/* =========================================================
   PROJECT EULER DESIGN SYSTEM
   Sprint 1 — Foundation
   ========================================================= */

/* ---------- Design tokens ---------- */

:root {
  /* Brand */
  --color-primary-50: #eef4ff;
  --color-primary-100: #d9e6ff;
  --color-primary-200: #bcd2ff;
  --color-primary-300: #8eb5ff;
  --color-primary-400: #5a8cff;
  --color-primary-500: #3465f3;
  --color-primary-600: #2449d8;
  --color-primary-700: #203bad;
  --color-primary-800: #20358a;
  --color-primary-900: #1e306d;

  /* Accent */
  --color-accent-400: #22d3a7;
  --color-accent-500: #10b981;
  --color-accent-600: #059669;

  /* Neutral */
  --color-white: #ffffff;
  --color-gray-25: #fcfcfd;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  --color-gray-950: #07101f;

  /* Semantic */
  --color-success: #16a34a;
  --color-success-soft: #dcfce7;

  --color-warning: #d97706;
  --color-warning-soft: #fef3c7;

  --color-danger: #dc2626;
  --color-danger-soft: #fee2e2;

  --color-info: #0284c7;
  --color-info-soft: #e0f2fe;

  /* Application surfaces */
  --background-page: var(--color-gray-50);
  --background-surface: var(--color-white);
  --background-subtle: var(--color-gray-100);
  --background-sidebar: var(--color-gray-950);

  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-muted: var(--color-gray-500);
  --text-on-brand: var(--color-white);

  --border-default: var(--color-gray-200);
  --border-strong: var(--color-gray-300);
  --focus-ring: rgba(52, 101, 243, 0.24);

  /* Typography */
  --font-sans:
    Inter,
    ui-sans-serif,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;

  --font-mono:
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
    monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.125rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm:
    0 1px 3px rgba(15, 23, 42, 0.08),
    0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md:
    0 8px 20px rgba(15, 23, 42, 0.08),
    0 2px 6px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 18px 45px rgba(15, 23, 42, 0.12);

  /* Layout */
  --sidebar-width: 17rem;
  --header-height: 4.5rem;
  --content-max-width: 90rem;

  /* Motion */
  --transition-fast: 150ms ease;
  --transition-normal: 220ms ease;
}

/* ---------- Dark theme ---------- */

[data-theme="dark"] {
  --background-page: #07101f;
  --background-surface: #101b2d;
  --background-subtle: #172338;
  --background-sidebar: #050b16;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --border-default: #26354c;
  --border-strong: #384860;

  --focus-ring: rgba(90, 140, 255, 0.32);

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 22px 50px rgba(0, 0, 0, 0.38);
}

/* ---------- Reset ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--background-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ---------- Typography ---------- */

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: var(--space-4);
  font-size: clamp(2rem, 4vw, var(--font-size-4xl));
  line-height: var(--line-height-tight);
  letter-spacing: -0.03em;
}

h2 {
  margin-bottom: var(--space-3);
  font-size: var(--font-size-2xl);
  line-height: var(--line-height-tight);
}

h3 {
  margin-bottom: var(--space-2);
  font-size: var(--font-size-xl);
}

p {
  color: var(--text-secondary);
}

code,
pre {
  font-family: var(--font-mono);
}

/* ---------- Layout utilities ---------- */

.container {
  width: min(
    calc(100% - (var(--space-6) * 2)),
    var(--content-max-width)
  );
  margin-inline: auto;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* ---------- Card ---------- */

.card {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  background: var(--background-surface);
  box-shadow: var(--shadow-sm);
}

.card__header,
.card__body,
.card__footer {
  padding: var(--space-6);
}

.card__header {
  border-bottom: 1px solid var(--border-default);
}

.card__footer {
  border-top: 1px solid var(--border-default);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.btn--primary {
  background: var(--color-primary-600);
  color: var(--text-on-brand);
}

.btn--primary:hover {
  background: var(--color-primary-700);
}

.btn--secondary {
  border-color: var(--border-default);
  background: var(--background-surface);
  color: var(--text-primary);
}

.btn--secondary:hover {
  border-color: var(--border-strong);
  background: var(--background-subtle);
}

.btn--danger {
  background: var(--color-danger);
  color: var(--color-white);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn--ghost:hover {
  background: var(--background-subtle);
  color: var(--text-primary);
}

.btn--sm {
  min-height: 2.25rem;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
}

.btn--lg {
  min-height: 3.25rem;
  padding: var(--space-4) var(--space-6);
}

/* ---------- Form controls ---------- */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--background-surface);
  color: var(--text-primary);
  outline: none;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-input,
.form-select {
  min-height: 2.75rem;
  padding: 0 var(--space-4);
}

.form-textarea {
  min-height: 8rem;
  padding: var(--space-3) var(--space-4);
  resize: vertical;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.form-help {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.form-error {
  color: var(--color-danger);
  font-size: var(--font-size-sm);
}

/* ---------- Badges ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--background-subtle);
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.badge--success {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.badge--warning {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.badge--danger {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

.badge--info {
  background: var(--color-info-soft);
  color: var(--color-info);
}

/* ---------- Responsive behavior ---------- */

@media (max-width: 900px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - (var(--space-4) * 2)), var(--content-max-width));
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .card__header,
  .card__body,
  .card__footer {
    padding: var(--space-4);
  }

  .btn {
    width: 100%;
  }
}

/* ---------- Accessibility ---------- */

:focus-visible {
  outline: 3px solid var(--color-primary-400);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* =========================================================
   APPLICATION SHELL
   ========================================================= */

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
}

/* ---------- Sidebar ---------- */

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 50;
  width: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(
      circle at top left,
      rgba(52, 101, 243, 0.2),
      transparent 32%
    ),
    var(--background-sidebar);
  color: var(--color-white);
}

.sidebar__header {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar__logo {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(
    135deg,
    var(--color-primary-400),
    var(--color-accent-400)
  );
  color: var(--color-white);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  box-shadow: 0 8px 20px rgba(52, 101, 243, 0.3);
}

.sidebar__brand {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sidebar__brand-name {
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.01em;
}

.sidebar__brand-description {
  color: var(--color-gray-400);
  font-size: var(--font-size-xs);
}

.sidebar__content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5) var(--space-4);
}

.sidebar__section {
  margin-bottom: var(--space-6);
}

.sidebar__section-title {
  margin: 0 0 var(--space-2);
  padding: 0 var(--space-3);
  color: var(--color-gray-500);
  font-size: 0.6875rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar__link {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-gray-300);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.sidebar__link:hover {
  background: rgba(255, 255, 255, 0.07);
  color: var(--color-white);
  transform: translateX(2px);
}

.sidebar__link--active {
  background: rgba(52, 101, 243, 0.2);
  color: var(--color-white);
}

.sidebar__link--active::before {
  width: 0.25rem;
  height: 1.5rem;
  margin-left: calc(var(--space-3) * -1);
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
  background: var(--color-primary-400);
  content: "";
}

.sidebar__icon {
  width: 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--font-size-lg);
}

.sidebar__footer {
  padding: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar__user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.05);
}

.sidebar__avatar {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  background: var(--color-primary-600);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
}

.sidebar__user-info {
  min-width: 0;
}

.sidebar__user-name {
  overflow: hidden;
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar__user-role {
  color: var(--color-gray-400);
  font-size: var(--font-size-xs);
}

/* ---------- Main application ---------- */

.app-main {
  min-width: 0;
  grid-column: 2;
}

/* ---------- Header ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 var(--space-8);
  border-bottom: 1px solid var(--border-default);
  background: color-mix(
    in srgb,
    var(--background-surface) 88%,
    transparent
  );
  backdrop-filter: blur(16px);
}

.topbar__left,
.topbar__right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.topbar__menu-button {
  display: none;
}

.topbar__title-group {
  display: flex;
  flex-direction: column;
}

.topbar__title {
  margin: 0;
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.01em;
}

.topbar__subtitle {
  color: var(--text-muted);
  font-size: var(--font-size-xs);
}

.icon-button {
  width: 2.75rem;
  height: 2.75rem;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--background-surface);
  color: var(--text-secondary);
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.icon-button:hover {
  border-color: var(--border-strong);
  background: var(--background-subtle);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.icon-button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--focus-ring);
}

/* ---------- Page content ---------- */

.page-content {
  width: min(
    calc(100% - (var(--space-8) * 2)),
    var(--content-max-width)
  );
  margin-inline: auto;
  padding-block: var(--space-8) var(--space-16);
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.page-header__content {
  max-width: 48rem;
}

.page-header__eyebrow {
  margin-bottom: var(--space-2);
  color: var(--color-primary-600);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-header__title {
  margin-bottom: var(--space-3);
}

.page-header__description {
  max-width: 42rem;
  margin-bottom: 0;
  font-size: var(--font-size-lg);
}

.page-header__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------- Mobile overlay ---------- */

.sidebar-overlay {
  position: fixed;
  inset: 0;
  z-index: 45;
  display: none;
  background: rgba(2, 6, 23, 0.58);
  backdrop-filter: blur(2px);
}

/* ---------- Responsive shell ---------- */

@media (max-width: 900px) {
  .app-shell {
    display: block;
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }

  .sidebar.sidebar--open {
    transform: translateX(0);
  }

  .sidebar-overlay.sidebar-overlay--visible {
    display: block;
  }

  .app-main {
    min-height: 100vh;
  }

  .topbar__menu-button {
    display: inline-grid;
  }
}

@media (max-width: 768px) {
  .topbar {
    padding-inline: var(--space-4);
  }

  .topbar__subtitle {
    display: none;
  }

  .page-content {
    width: calc(100% - (var(--space-4) * 2));
    padding-block: var(--space-6) var(--space-12);
  }

  .page-header {
    flex-direction: column;
  }

  .page-header__actions {
    width: 100%;
  }

  .page-header__actions .btn {
    flex: 1;
  }
}

@media (max-width: 480px) {
  .topbar__title {
    max-width: 10rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .topbar__right .icon-button:not(#theme-toggle) {
    display: none;
  }

  .page-header__actions {
    flex-direction: column;
  }
}
/* =========================================================
   ICON SYSTEM
   ========================================================= */

.sidebar__icon svg {
  width: 1.2rem;
  height: 1.2rem;
  stroke-width: 1.9;
}

.icon-button svg {
  width: 1.2rem;
  height: 1.2rem;
  stroke-width: 2;
}

.btn svg {
  width: 1rem;
  height: 1rem;
  stroke-width: 2;
}
/* =========================================================
   MATH TUTOR WORKSPACE
   ========================================================= */

.tutor-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20rem;
  align-items: start;
  gap: var(--space-6);
}

.tutor-workspace,
.tutor-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.question-composer {
  overflow: hidden;
}

.question-composer__header,
.question-composer__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.question-composer__title {
  margin-bottom: var(--space-1);
}

.question-composer__description {
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

.input-tabs {
  display: inline-flex;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
  padding: var(--space-1);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--background-subtle);
}

.input-tab {
  display: inline-flex;
  min-height: 2.5rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.input-tab:hover {
  color: var(--text-primary);
}

.input-tab--active {
  background: var(--background-surface);
  color: var(--color-primary-600);
  box-shadow: var(--shadow-xs);
}

.input-tab svg {
  width: 1rem;
  height: 1rem;
}

.input-panel {
  min-height: 15rem;
}

.question-input-wrapper {
  overflow: hidden;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--background-surface);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.question-input-wrapper:focus-within {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.question-input {
  min-height: 11rem;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.question-input:focus {
  box-shadow: none;
}

.question-input__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3);
  border-top: 1px solid var(--border-default);
  background: var(--background-subtle);
}

.question-input__tools {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.composer-tool {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.composer-tool:hover {
  background: var(--background-surface);
  color: var(--text-primary);
}

.composer-tool svg {
  width: 1rem;
  height: 1rem;
}

.character-count {
  color: var(--text-muted);
  font-size: var(--font-size-xs);
  white-space: nowrap;
}

.upload-zone {
  width: 100%;
  min-height: 15rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-8);
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-xl);
  background: var(--background-subtle);
  color: var(--text-primary);
  text-align: center;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.upload-zone:hover {
  border-color: var(--color-primary-500);
  background: var(--color-primary-50);
  transform: translateY(-2px);
}

[data-theme="dark"] .upload-zone:hover {
  background: rgba(52, 101, 243, 0.1);
}

.upload-zone__icon,
.empty-state__icon,
.tutor-tip__icon {
  width: 3.5rem;
  height: 3.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-lg);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

[data-theme="dark"] .upload-zone__icon,
[data-theme="dark"] .empty-state__icon,
[data-theme="dark"] .tutor-tip__icon {
  background: rgba(52, 101, 243, 0.18);
  color: var(--color-primary-300);
}

.upload-zone__icon svg,
.empty-state__icon svg,
.tutor-tip__icon svg {
  width: 1.65rem;
  height: 1.65rem;
}

.upload-zone__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
}

.upload-zone__description {
  color: var(--text-secondary);
}

.upload-zone__formats {
  color: var(--text-muted);
  font-size: var(--font-size-xs);
}

.image-preview {
  overflow: hidden;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
}

.image-preview img {
  width: 100%;
  max-height: 24rem;
  object-fit: contain;
  background: var(--background-subtle);
}

.image-preview__information {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
}

.image-preview__name,
.image-preview__size {
  margin-bottom: 0;
}

.image-preview__name {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
}

.image-preview__size {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.voice-recorder {
  min-height: 15rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  padding: var(--space-8);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  background: var(--background-subtle);
  text-align: center;
}

.voice-recorder__button {
  width: 5rem;
  height: 5rem;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: var(--radius-full);
  background: var(--color-primary-600);
  color: var(--color-white);
  box-shadow: 0 12px 30px rgba(52, 101, 243, 0.3);
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast);
}

.voice-recorder__button:hover {
  transform: scale(1.05);
  background: var(--color-primary-700);
}

.voice-recorder__button svg {
  width: 2rem;
  height: 2rem;
}

.voice-recorder__content h3 {
  margin-bottom: var(--space-2);
}

.voice-recorder__content p {
  margin-bottom: 0;
}

.voice-recorder__timer {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.response-preference {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.response-preference__select {
  min-width: 11rem;
}

.tutor-response {
  min-height: 20rem;
}

.empty-state {
  min-height: 20rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-8);
  text-align: center;
}

.empty-state h2,
.empty-state p {
  max-width: 31rem;
  margin-bottom: 0;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.section-heading h3 {
  margin-bottom: var(--space-1);
}

.section-heading p {
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

.section-heading > svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-warning);
}

.suggested-questions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.suggested-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--text-secondary);
  text-align: left;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.suggested-question:hover {
  border-color: var(--border-default);
  background: var(--background-subtle);
  color: var(--text-primary);
}

.suggested-question__icon {
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: var(--color-primary-50);
  color: var(--color-primary-600);
}

[data-theme="dark"] .suggested-question__icon {
  background: rgba(52, 101, 243, 0.14);
  color: var(--color-primary-300);
}

.suggested-question__icon svg {
  width: 1rem;
  height: 1rem;
}

.tutor-tip {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.tutor-tip__icon {
  flex-shrink: 0;
}

.tutor-tip h3 {
  margin-bottom: var(--space-2);
}

.tutor-tip p {
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

/* ---------- Tutor responsive behavior ---------- */

@media (max-width: 1200px) {
  .tutor-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .tutor-sidebar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .question-composer__header,
  .question-composer__footer {
    align-items: stretch;
    flex-direction: column;
  }

  .input-tabs {
    width: 100%;
  }

  .input-tab {
    flex: 1;
    padding-inline: var(--space-2);
  }

  .response-preference {
    align-items: stretch;
    flex-direction: column;
  }

  .response-preference__select {
    width: 100%;
  }

  .tutor-sidebar {
    display: flex;
  }
}

@media (max-width: 480px) {
  .input-tab {
    font-size: var(--font-size-xs);
  }

  .question-input__footer {
    align-items: flex-end;
  }

  .composer-tool {
    padding-inline: var(--space-2);
  }

  .composer-tool span {
    display: none;
  }
}

/* =========================================================
   TUTOR RESPONSE
   ========================================================= */

.tutor-response {
  overflow: hidden;
  scroll-margin-top: calc(
    var(--header-height) + var(--space-6)
  );
}

.tutor-response__content {
  min-height: 20rem;
}

.response-loading,
.response-error {
  min-height: 20rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  padding: var(--space-8);
  text-align: left;
}

.response-loading h2,
.response-error h2 {
  margin-bottom: var(--space-2);
}

.response-loading p,
.response-error p {
  max-width: 34rem;
  margin-bottom: 0;
}

.response-loading__spinner,
.button-spinner {
  display: inline-block;
  flex-shrink: 0;
  border-style: solid;
  border-color: var(--border-default);
  border-top-color: var(--color-primary-600);
  border-radius: var(--radius-full);
  animation: tutor-spin 800ms linear infinite;
}

.response-loading__spinner {
  width: 3rem;
  height: 3rem;
  border-width: 0.25rem;
}

.button-spinner {
  width: 1rem;
  height: 1rem;
  border-width: 0.15rem;
  border-color: rgba(255, 255, 255, 0.4);
  border-top-color: var(--color-white);
}

@keyframes tutor-spin {
  to {
    transform: rotate(360deg);
  }
}

.response-error {
  align-items: flex-start;
  justify-content: flex-start;
  background: color-mix(
    in srgb,
    var(--color-danger-soft) 55%,
    var(--background-surface)
  );
}

.response-error__icon {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: var(--radius-lg);
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

.response-error__icon svg {
  width: 1.4rem;
  height: 1.4rem;
}

.response-error__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.solution__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-default);
  background:
    linear-gradient(
      135deg,
      color-mix(
        in srgb,
        var(--color-primary-50) 75%,
        var(--background-surface)
      ),
      var(--background-surface)
    );
}

[data-theme="dark"] .solution__header {
  background:
    linear-gradient(
      135deg,
      rgba(52, 101, 243, 0.12),
      var(--background-surface)
    );
}

.solution__eyebrow {
  margin-bottom: var(--space-2);
  color: var(--color-primary-600);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

[data-theme="dark"] .solution__eyebrow {
  color: var(--color-primary-300);
}

.solution__header h2 {
  margin-bottom: var(--space-2);
}

.solution__question {
  max-width: 48rem;
  margin-bottom: 0;
  color: var(--text-secondary);
}

.solution__body {
  padding: var(--space-6);
}

.solution-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.solution-step {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--space-4);
}

.solution-step__number {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--color-primary-600);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
}

.solution-step__content {
  min-width: 0;
  padding: var(--space-1) 0 var(--space-5);
  border-bottom: 1px solid var(--border-default);
}

.solution-step:last-child .solution-step__content {
  border-bottom: 0;
}

.solution-step__content h3 {
  margin-bottom: var(--space-2);
}

.solution-step__content p {
  margin-bottom: var(--space-3);
  line-height: var(--line-height-relaxed);
}

.solution-step__expression {
  overflow-x: auto;
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--background-subtle);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  white-space: pre-wrap;
}

.solution-no-steps {
  margin-bottom: var(--space-6);
}

.final-answer {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding: var(--space-5);
  border: 1px solid
    color-mix(
      in srgb,
      var(--color-success) 30%,
      var(--border-default)
    );
  border-radius: var(--radius-xl);
  background:
    color-mix(
      in srgb,
      var(--color-success-soft) 45%,
      var(--background-surface)
    );
}

.final-answer__icon {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  background: var(--color-success);
  color: var(--color-white);
}

.final-answer__icon svg {
  width: 1.2rem;
  height: 1.2rem;
}

.final-answer__label {
  margin-bottom: var(--space-1);
  color: var(--color-success);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.final-answer__value {
  margin-bottom: 0;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  white-space: pre-wrap;
}

.solution__message {
  margin: var(--space-5) 0 0;
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-default);
  font-size: var(--font-size-sm);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  transform: none;
}

@media (max-width: 640px) {
  .solution__header {
    flex-direction: column;
    padding: var(--space-4);
  }

  .solution__body {
    padding: var(--space-4);
  }

  .solution-step {
    grid-template-columns: 2rem minmax(0, 1fr);
    gap: var(--space-3);
  }

  .solution-step__number {
    width: 2rem;
    height: 2rem;
  }

  .response-loading,
  .response-error {
    min-height: 16rem;
    align-items: flex-start;
    flex-direction: column;
    padding: var(--space-5);
  }
}
/* =========================================================
   EDUCATIONAL EXPLANATION
   ========================================================= */

.solution__introduction {
  max-width: 48rem;
  margin: var(--space-4) 0 0;
  padding: var(--space-4);
  border-left: 3px solid var(--color-primary-500);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--background-subtle);
  color: var(--text-primary);
  line-height: var(--line-height-relaxed);
}

.learning-note {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding: var(--space-5);
  border: 1px solid
    color-mix(
      in srgb,
      var(--color-warning) 30%,
      var(--border-default)
    );
  border-radius: var(--radius-xl);
  background:
    color-mix(
      in srgb,
      var(--color-warning-soft) 42%,
      var(--background-surface)
    );
}

.learning-note__icon {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  background: var(--color-warning);
  color: var(--color-white);
}

.learning-note__icon svg {
  width: 1.2rem;
  height: 1.2rem;
}

.learning-note__label {
  margin-bottom: var(--space-1);
  color: var(--color-warning);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.learning-note__text {
  margin-bottom: 0;
  color: var(--text-primary);
  line-height: var(--line-height-relaxed);
}

.solution__encouragement {
  margin: var(--space-5) 0 0;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-style: italic;
  line-height: var(--line-height-relaxed);
}
/* =========================================================
   PROGRESSIVE HINTS
   ========================================================= */

.hint-panel {
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  border: 1px solid
    color-mix(
      in srgb,
      var(--color-info) 30%,
      var(--border-default)
    );
  border-radius: var(--radius-xl);
  background:
    color-mix(
      in srgb,
      var(--color-info-soft) 38%,
      var(--background-surface)
    );
}

.hint-panel__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.hint-panel__header h3 {
  margin-bottom: 0;
}

.hint-panel__eyebrow {
  margin-bottom: var(--space-1);
  color: var(--color-info);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hint-panel__description {
  margin: var(--space-3) 0 var(--space-4);
  font-size: var(--font-size-sm);
}

.hint-panel__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.hint-panel__empty {
  min-height: 6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  text-align: center;
}

.hint-panel__empty svg {
  width: 1.1rem;
  height: 1.1rem;
}

.revealed-hint {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--background-surface);
}

.revealed-hint__number {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--color-info);
  color: var(--color-white);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
}

.revealed-hint p {
  margin: 0;
  color: var(--text-primary);
  line-height: var(--line-height-relaxed);
}

.hint-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

@media (max-width: 640px) {
  .hint-panel__header {
    flex-direction: column;
  }

  .hint-panel__actions {
    flex-direction: column;
  }

  .hint-panel__actions .btn {
    width: 100%;
  }
}
/* =========================================================
   STUDENT ATTEMPT
   ========================================================= */

.student-attempt {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--background-surface);
}

.student-attempt__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.student-attempt__header h4 {
  margin: 0;
  color: var(--text-primary);
  font-size: var(--font-size-base);
}

.student-attempt__header > svg {
  width: 1.2rem;
  height: 1.2rem;
  color: var(--color-primary-500);
}

.student-attempt__eyebrow {
  margin-bottom: var(--space-1);
  color: var(--color-primary-500);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.student-attempt__controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-3);
}

.student-attempt__feedback {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
}

.student-attempt__feedback[hidden] {
  display: none;
}

.student-attempt__feedback--success {
  border-color:
    color-mix(
      in srgb,
      var(--color-success) 40%,
      var(--border-default)
    );
  background:
    color-mix(
      in srgb,
      var(--color-success-soft) 45%,
      var(--background-surface)
    );
}

.student-attempt__feedback--error {
  border-color:
    color-mix(
      in srgb,
      var(--color-danger) 35%,
      var(--border-default)
    );
  background:
    color-mix(
      in srgb,
      var(--color-danger-soft) 45%,
      var(--background-surface)
    );
}

.student-attempt__feedback--info {
  border-color:
    color-mix(
      in srgb,
      var(--color-info) 35%,
      var(--border-default)
    );
  background:
    color-mix(
      in srgb,
      var(--color-info-soft) 40%,
      var(--background-surface)
    );
}

.student-attempt__feedback-icon {
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  background: var(--background-subtle);
}

.student-attempt__feedback-icon svg {
  width: 1.1rem;
  height: 1.1rem;
}

.student-attempt__feedback--success
.student-attempt__feedback-icon {
  color: var(--color-success);
}

.student-attempt__feedback--error
.student-attempt__feedback-icon {
  color: var(--color-danger);
}

.student-attempt__feedback--info
.student-attempt__feedback-icon {
  color: var(--color-info);
}

.student-attempt__feedback h5 {
  margin: 0 0 var(--space-1);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
}

.student-attempt__feedback p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.student-attempt__correct-answer {
  margin-top: var(--space-2) !important;
}

@media (max-width: 640px) {
  .student-attempt__controls {
    grid-template-columns: 1fr;
  }

  .student-attempt__controls .btn {
    width: 100%;
  }
}
[hidden] {
  display: none !important;
}


/* =====================================================
   EDUVIXA MATH BRAND ASSETS
   ===================================================== */

.eduvixa-brand-mark {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.sidebar__brand-icon,
.sidebar__logo {
  flex: 0 0 auto;
  overflow: hidden;
}

.sidebar__brand-icon .eduvixa-brand-mark {
  width: 36px;
  height: 36px;
}

.sidebar__logo .eduvixa-brand-mark {
  width: 42px;
  height: 42px;
}

.auth-brand__icon,
.auth-brand__logo,
.brand-mark,
.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.auth-brand__icon .eduvixa-brand-mark,
.auth-brand__logo .eduvixa-brand-mark,
.brand-mark .eduvixa-brand-mark,
.brand-logo .eduvixa-brand-mark {
  width: 48px;
  height: 48px;
}

@media (max-width: 680px) {
  .sidebar__brand-icon .eduvixa-brand-mark,
  .sidebar__logo .eduvixa-brand-mark {
    width: 36px;
    height: 36px;
  }
}


/* =====================================================
   EDUVIXA MATH LOGO
   Transparent logo without the old Sigma container
   ===================================================== */

.eduvixa-brand-logo {
  display: block;
  width: 52px;
  height: 52px;
  max-width: none;
  object-fit: contain;
  object-position: center;
  background: transparent;
}

/*
  Remove the old square styling around the Sigma logo.
  :has() targets only containers holding the Eduvixa logo.
*/
.sidebar__brand-icon:has(.eduvixa-brand-logo),
.sidebar__logo:has(.eduvixa-brand-logo),
.auth-brand__icon:has(.eduvixa-brand-logo),
.auth-brand__logo:has(.eduvixa-brand-logo),
.brand-icon:has(.eduvixa-brand-logo),
.brand-mark:has(.eduvixa-brand-logo),
[class*="brand-icon"]:has(.eduvixa-brand-logo),
[class*="brand-mark"]:has(.eduvixa-brand-logo) {
  width: 54px;
  height: 54px;
  min-width: 54px;
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

/* Slightly smaller inside the application sidebar */
.sidebar__brand-icon .eduvixa-brand-logo,
.sidebar__logo .eduvixa-brand-logo {
  width: 42px;
  height: 42px;
}

/* Larger on authentication pages */
.auth-brand__icon .eduvixa-brand-logo,
.auth-brand__logo .eduvixa-brand-logo,
[class*="auth"] [class*="brand"] .eduvixa-brand-logo {
  width: 56px;
  height: 56px;
}

@media (max-width: 680px) {
  .eduvixa-brand-logo {
    width: 46px;
    height: 46px;
  }
}


/* =====================================================
   EDUVIXA MATH PNG LOGO
   ===================================================== */

.eduvixa-brand-logo {
  display: block;
  width: 58px;
  height: 58px;
  max-width: none;
  object-fit: contain;
  background: transparent;
}

/* Remove the old Sigma box */
.sidebar__brand-icon:has(.eduvixa-brand-logo),
.sidebar__logo:has(.eduvixa-brand-logo),
.auth-brand__icon:has(.eduvixa-brand-logo),
.auth-brand__logo:has(.eduvixa-brand-logo),
.brand-icon:has(.eduvixa-brand-logo),
.brand-mark:has(.eduvixa-brand-logo),
[class*="brand-icon"]:has(.eduvixa-brand-logo),
[class*="brand-mark"]:has(.eduvixa-brand-logo) {
  width: 60px;
  height: 60px;
  min-width: 60px;
  padding: 0;
  border: 0;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  box-shadow: none;
}

/* Authentication pages */
.auth-brand__icon .eduvixa-brand-logo,
.auth-brand__logo .eduvixa-brand-logo,
[class*="auth"] [class*="brand"] .eduvixa-brand-logo {
  width: 60px;
  height: 60px;
}

/* Application sidebar */
.sidebar__brand-icon .eduvixa-brand-logo,
.sidebar__logo .eduvixa-brand-logo {
  width: 46px;
  height: 46px;
}


/* =====================================================
   EDUVIXA MATH LOGO — FINAL PNG
   ===================================================== */

.eduvixa-brand-logo {
  display: block;
  width: 56px;
  height: 56px;
  max-width: none;
  object-fit: contain;
  object-position: center;
  background: transparent;
}

/* Remove the old Sigma container design */
.sidebar__brand-icon:has(.eduvixa-brand-logo),
.sidebar__logo:has(.eduvixa-brand-logo),
.auth-brand__icon:has(.eduvixa-brand-logo),
.auth-brand__logo:has(.eduvixa-brand-logo),
.brand-icon:has(.eduvixa-brand-logo),
.brand-mark:has(.eduvixa-brand-logo),
[class*="brand-icon"]:has(.eduvixa-brand-logo),
[class*="brand-mark"]:has(.eduvixa-brand-logo) {
  width: 58px;
  height: 58px;
  min-width: 58px;
  padding: 0;
  border: 0;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  box-shadow: none;
}

/* Sign-in, sign-up and onboarding pages */
[class*="auth"] [class*="brand"]
.eduvixa-brand-logo {
  width: 58px;
  height: 58px;
}

/* Application sidebar */
.sidebar__brand-icon
.eduvixa-brand-logo,
.sidebar__logo
.eduvixa-brand-logo {
  width: 46px;
  height: 46px;
}


/* =====================================================
   EDUVIXA MATH LOGO — FINAL OVERRIDE
   ===================================================== */

.eduvixa-brand-logo {
  display: block !important;
  width: 58px !important;
  height: 58px !important;
  max-width: none !important;
  object-fit: contain !important;
  object-position: center !important;
  border: 0 !important;
  border-radius: 14px !important;
  background: transparent !important;
  box-shadow: none !important;
}

/* Remove the old Sigma container box */
.sidebar__logo,
.sidebar__brand-icon,
.auth-brand__icon,
.auth-brand__logo,
.brand-icon,
.brand-mark {
  background: transparent !important;
  border: 0 !important;
  box-shadow: none !important;
}

.sidebar__logo:has(.eduvixa-brand-logo),
.sidebar__brand-icon:has(.eduvixa-brand-logo),
.auth-brand__icon:has(.eduvixa-brand-logo),
.auth-brand__logo:has(.eduvixa-brand-logo),
.brand-icon:has(.eduvixa-brand-logo),
.brand-mark:has(.eduvixa-brand-logo) {
  width: 60px !important;
  height: 60px !important;
  min-width: 60px !important;
  padding: 0 !important;
  overflow: visible !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

/* Application sidebar */
.sidebar__logo .eduvixa-brand-logo,
.sidebar__brand-icon .eduvixa-brand-logo {
  width: 54px !important;
  height: 54px !important;
}

/* Sign-in, sign-up and onboarding */
.auth-brand__icon .eduvixa-brand-logo,
.auth-brand__logo .eduvixa-brand-logo,
.auth-shell [class*="brand"] .eduvixa-brand-logo {
  width: 60px !important;
  height: 60px !important;
}


/* =====================================================
   EDUVIXA MATH LOGO — FINAL SIZE AND CONTAINER
   ===================================================== */

.eduvixa-brand-logo,
.eduvixa-brand-mark {
  display: block !important;
  width: 56px !important;
  height: 56px !important;
  min-width: 56px !important;
  max-width: 56px !important;
  object-fit: contain !important;
  object-position: center !important;
  padding: 0 !important;
  margin: 0 !important;
  border: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

/* Remove the old Sigma square */
.sidebar__logo,
.sidebar__brand-icon,
.auth-brand__icon,
.auth-brand__logo {
  width: 60px !important;
  height: 60px !important;
  min-width: 60px !important;
  padding: 0 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  overflow: visible !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

/* Application sidebar */
.sidebar__logo img,
.sidebar__brand-icon img {
  width: 54px !important;
  height: 54px !important;
}

/* Authentication pages */
.auth-brand__icon img,
.auth-brand__logo img,
.auth-shell [class*="brand"] img {
  width: 58px !important;
  height: 58px !important;
}

/* ==========================================================
   Eduvixa Auth Logo
   ========================================================== */

.auth-brand__mark {
  width: 64px;
  height: 64px;

  display: flex;
  align-items: center;
  justify-content: center;

  background: none !important;
  border: none !important;
  box-shadow: none !important;

  overflow: visible;
}

.auth-brand__logo {
  width: 60px;
  height: 60px;

  object-fit: contain;
  display: block;
}



/* =====================================================
   EDUVIXA LOGO — CONSISTENT FINAL SIZE
   ===================================================== */

/* Remove all old logo container decoration */
.auth-brand__mark,
.sidebar__logo,
.sidebar__brand-icon,
.sidebar__brand-mark {
  display: flex !important;
  flex: 0 0 auto !important;
  align-items: center !important;
  justify-content: center !important;

  padding: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;

  background: transparent !important;
  background-image: none !important;
  box-shadow: none !important;

  overflow: visible !important;
}

/* Sign-in, sign-up and onboarding logo */
.auth-brand__mark {
  width: 76px !important;
  height: 76px !important;
  min-width: 76px !important;
}

.auth-brand__mark img,
.auth-brand__logo {
  display: block !important;
  width: 72px !important;
  height: 72px !important;
  min-width: 72px !important;
  max-width: 72px !important;

  object-fit: contain !important;
  object-position: center !important;

  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

/* Dashboard and application sidebar logo */
.sidebar__logo,
.sidebar__brand-icon,
.sidebar__brand-mark {
  width: 56px !important;
  height: 56px !important;
  min-width: 56px !important;
}

.sidebar__logo img,
.sidebar__brand-icon img,
.sidebar__brand-mark img,
.sidebar__logo .eduvixa-brand-logo,
.sidebar__brand-icon .eduvixa-brand-logo {
  display: block !important;
  width: 52px !important;
  height: 52px !important;
  min-width: 52px !important;
  max-width: 52px !important;

  object-fit: contain !important;

  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}

/* General fallback */
.eduvixa-brand-logo,
.eduvixa-brand-mark {
  object-fit: contain !important;
  object-position: center !important;
}
/* =====================================================
   Disabled sidebar items
   ===================================================== */

.sidebar__nav-link--disabled {
  opacity: .45;
  cursor: not-allowed;

  pointer-events: none;

  user-select: none;
}

.sidebar__nav-link--disabled:hover {
  background: inherit;
}

.coming-soon-badge {
  display: inline-block;

  margin-left: 8px;

  padding: 2px 7px;

  border-radius: 999px;

  font-size: .68rem;

  background: #f59e0b;

  color: white;

  font-weight: 600;
}

/* =====================================================
   MATH TUTOR — TEMPORARILY DISABLED
   ===================================================== */

a[href="/tutor"],
a[href="/tutor/"],
a[href^="/tutor?"] {
  pointer-events: none !important;
  cursor: not-allowed !important;
  opacity: 0.45 !important;
  user-select: none !important;
}

a[href="/tutor"]::after,
a[href="/tutor/"]::after,
a[href^="/tutor?"]::after {
  content: "Coming soon";
  display: inline-flex;
  margin-left: auto;
  padding: 3px 7px;
  border-radius: 999px;
  font-size: 9px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.25);
}


/* =====================================================
   MATH TUTOR — COMING SOON
   ===================================================== */

[data-disabled-tutor="true"] {
  opacity: 0.48 !important;
  cursor: not-allowed !important;
  pointer-events: none !important;
  user-select: none !important;
}

[data-disabled-tutor="true"]::after {
  content: "Soon";
  display: inline-flex;
  align-items: center;
  justify-content: center;

  margin-left: auto;
  padding: 3px 7px;

  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 999px;

  background: rgba(245, 158, 11, 0.12);
  color: #fbbf24;

  font-size: 9px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}


/* =====================================================
   ASSESSMENT CERTIFICATE AND PROMOTION RESULT
   ===================================================== */

.assessment-results__promotion,
.assessment-results__grade-progress {
  display: flex;
  align-items: flex-start;
  gap: 14px;

  width: min(680px, 100%);
  margin: 22px auto 0;
  padding: 18px 20px;

  border: 1px solid
    rgba(59, 130, 246, 0.24);
  border-radius: 16px;

  background:
    rgba(59, 130, 246, 0.08);

  text-align: left;
}

.assessment-results__promotion {
  border-color:
    rgba(16, 185, 129, 0.3);

  background:
    rgba(16, 185, 129, 0.1);
}

.assessment-results__promotion svg,
.assessment-results__grade-progress svg {
  flex: 0 0 auto;

  width: 24px;
  height: 24px;

  color: #60a5fa;
}

.assessment-results__promotion svg {
  color: #34d399;
}

.assessment-results__promotion strong,
.assessment-results__grade-progress strong {
  display: block;

  margin-bottom: 5px;

  color: var(
    --color-text-primary,
    #f8fafc
  );

  font-size: 1rem;
}

.assessment-results__promotion p,
.assessment-results__grade-progress p {
  margin: 0;

  color: var(
    --color-text-secondary,
    #94a3b8
  );

  line-height: 1.6;
}

.assessment-results__actions {
  flex-wrap: wrap;
}