/* ═══════════════════════════════════════════════
   PAGE-SPECIFIC STYLES
   ═══════════════════════════════════════════════ */

/* ══════════════════════════════════════
   SPLASH SCREEN
   ══════════════════════════════════════ */
.splash-screen {
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: var(--sp-4);
  position: relative;
  overflow: hidden;
}

.splash-screen::before {
  content: '';
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, rgba(30, 136, 229, 0.22) 0%, rgba(30, 136, 229, 0.04) 55%, transparent 75%);
  filter: blur(40px);
  animation: pulse-glow 3.5s ease-in-out infinite alternate;
  pointer-events: none;
}

.splash-logo {
  width: 110px;
  height: 110px;
  filter: drop-shadow(0 12px 24px rgba(30, 136, 229, 0.35));
  animation: float 3s ease-in-out infinite;
  z-index: 1;
}

.splash-title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-extrabold);
  letter-spacing: -0.5px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
  z-index: 1;
}

.splash-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  margin-top: calc(-1 * var(--sp-2));
  z-index: 1;
}

.splash-loader-bar {
  width: 140px;
  height: 4px;
  background: var(--color-surface-variant);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
  margin-top: var(--sp-4);
  z-index: 1;
}

.splash-loader-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 45%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  animation: shimmer-slide 1.4s ease-in-out infinite;
}

@keyframes shimmer-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

@keyframes pulse-glow {
  0% { transform: scale(0.9); opacity: 0.6; }
  100% { transform: scale(1.15); opacity: 1; }
}

/* ══════════════════════════════════════
   LOGIN / SIGNUP CHOICE
   ══════════════════════════════════════ */
.auth-choice-container {
  min-height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: var(--sp-6) var(--sp-4);
  box-sizing: border-box;
  position: relative;
  overflow-y: auto;
}

.auth-choice-container::before {
  content: '';
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 136, 229, 0.15) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  filter: blur(50px);
  pointer-events: none;
}

.auth-choice {
  padding: var(--sp-8) var(--sp-6);
  max-width: 480px;
  width: 100%;
  margin: auto;
  box-sizing: border-box;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  position: relative;
  z-index: 1;
}

.auth-choice-logo-wrapper {
  position: relative;
  display: inline-block;
  margin: 0 auto var(--sp-4);
}

.auth-choice-logo {
  width: 84px;
  height: 84px;
  filter: drop-shadow(0 8px 16px rgba(30, 136, 229, 0.3));
  display: block;
}

.auth-choice-title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-extrabold);
  letter-spacing: -0.5px;
  margin-bottom: var(--sp-1);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-choice-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--fs-sm);
  margin-bottom: var(--sp-6);
}

.auth-choice-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  width: 100%;
  box-sizing: border-box;
}

.auth-choice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
  box-sizing: border-box;
}

.auth-choice-grid .btn {
  width: 100%;
  min-width: 0;
  padding: 12px 14px;
  font-size: var(--fs-base);
  box-sizing: border-box;
}

@media (max-width: 360px) {
  .auth-choice-grid {
    grid-template-columns: 1fr;
  }
}

.or-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: var(--sp-3);
  margin: var(--sp-4) 0;
  color: var(--color-text-tertiary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  text-align: center;
}

.or-divider::before,
.or-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
  opacity: 0.8;
}

/* ══════════════════════════════════════
   LOGIN / SIGNUP FORMS
   ══════════════════════════════════════ */
.auth-page-container {
  min-height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: var(--sp-6) var(--sp-4);
  box-sizing: border-box;
  position: relative;
  overflow-y: auto;
}

.auth-page {
  padding: var(--sp-8) var(--sp-6);
  max-width: 460px;
  width: 100%;
  margin: auto;
  box-sizing: border-box;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  position: relative;
  z-index: 1;
}

@media (max-width: 480px) {
  .auth-choice-container,
  .auth-page-container {
    padding: var(--sp-4) var(--sp-3);
  }
  .auth-choice,
  .auth-page {
    padding: var(--sp-6) var(--sp-4);
    border-radius: var(--radius-lg);
  }
}

.auth-header {
  text-align: center;
  margin-bottom: var(--sp-6);
}

.auth-logo {
  width: 68px;
  height: 68px;
  margin: 0 auto var(--sp-3);
  filter: drop-shadow(0 6px 14px rgba(30, 136, 229, 0.25));
}

.auth-title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  letter-spacing: -0.3px;
  margin-bottom: var(--sp-1);
}

.auth-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--fs-sm);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.auth-links {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-sm);
  margin-top: var(--sp-1);
}

.auth-links a {
  color: var(--color-primary);
  font-weight: var(--fw-semibold);
  transition: opacity 0.15s;
}

.auth-links a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.auth-bottom-link {
  text-align: center;
  margin-top: var(--sp-6);
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}

.auth-bottom-link a {
  color: var(--color-primary);
  font-weight: var(--fw-bold);
  margin-inline-start: var(--sp-1);
}

/* ── Student Type Selector in Signup ── */
.type-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
  margin-top: var(--sp-1);
}

.type-card {
  padding: var(--sp-4) var(--sp-3);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
  background: var(--color-surface-variant);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
}

.type-card .material-icons-round {
  font-size: 26px;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.type-card-label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
}

.type-card:hover {
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
}

.type-card.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-dim);
  color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(30, 136, 229, 0.15);
}

.type-card.selected .material-icons-round {
  color: var(--color-primary);
}

/* ── Password Strength ── */
.password-strength {
  display: flex;
  gap: var(--sp-1);
  margin-top: var(--sp-1);
}

.strength-bar {
  flex: 1;
  height: 4px;
  background: var(--color-surface-variant);
  border-radius: var(--radius-full);
  transition: background var(--duration-fast) var(--ease-in-out);
}

.strength-bar.weak {
  background: var(--color-error);
}

.strength-bar.medium {
  background: var(--color-warning);
}

.strength-bar.strong {
  background: var(--color-success);
}

/* ══════════════════════════════════════
   HOME PAGE
   ══════════════════════════════════════ */
.home-page {
  padding-bottom: var(--sp-8);
}

.home-welcome {
  padding: var(--sp-6);
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  color: white;
  margin-bottom: var(--sp-6);
  position: relative;
  overflow: hidden;
}

.home-welcome::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.home-welcome-greeting {
  font-size: var(--fs-sm);
  opacity: 0.9;
}

.home-welcome-name {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  margin-top: var(--sp-1);
}

.home-quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--sp-3);
  margin-bottom: var(--sp-6);
}

@media (min-width: 768px) {
  .home-quick-actions {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-4);
  }
}

.quick-action-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-4);
  text-align: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.quick-action-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elevated);
}

.quick-action-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--sp-2);
  font-size: 26px;
}

.quick-action-label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
}

/* ── Blog Posts Grid ── */
.blog-list, #blog-posts-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--sp-4);
  width: 100%;
}

.blog-post-card {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  background: var(--color-card-bg);
  transition: all var(--duration-fast) var(--ease-out);
}

.blog-post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-elevated);
  border-color: var(--color-primary-dim);
}

.blog-post-img-wrapper {
  position: relative;
  width: 100%;
  height: 160px;
  max-height: 170px;
  background: var(--color-surface-variant);
  overflow: hidden;
  flex-shrink: 0;
}

.blog-post-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.blog-post-card:hover .blog-post-img-wrapper img {
  transform: scale(1.03);
}

@media (max-width: 600px) {
  .blog-list, #blog-posts-container {
    grid-template-columns: 1fr;
  }
  .blog-post-img-wrapper {
    height: 180px;
    max-height: 200px;
    aspect-ratio: 16/9;
  }
}

@media (min-width: 1024px) {
  .blog-list, #blog-posts-container {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--sp-5);
  }
  .blog-post-img-wrapper {
    height: 150px;
    max-height: 160px;
  }
}

/* ── Ecosystem Section ── */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.ecosystem-card {
  padding: 0 !important;
  overflow: hidden;
  border-radius: 18px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
}

.ecosystem-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-elevated);
}

.ecosystem-img-wrapper {
  width: 100%;
  height: 160px;
  max-height: 170px;
  background: var(--color-surface-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}

.ecosystem-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.ecosystem-card:hover .ecosystem-img-wrapper img {
  transform: scale(1.03);
}

@media (max-width: 600px) {
  .ecosystem-grid {
    grid-template-columns: 1fr;
  }
  .ecosystem-img-wrapper {
    height: 180px;
    max-height: 200px;
    aspect-ratio: 16/9;
  }
}

@media (min-width: 1024px) {
  .ecosystem-grid {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--sp-5);
  }
  .ecosystem-img-wrapper {
    height: 150px;
    max-height: 160px;
  }
}

.blog-card {
  display: flex;
  gap: var(--sp-4);
  padding: var(--sp-4);
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.blog-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elevated);
  border-color: var(--color-primary);
}

.blog-card-image {
  width: 84px;
  height: 84px;
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
}

.blog-card-content {
  flex: 1;
  min-width: 0;
}

.blog-card-category {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--sp-1);
}

.blog-card-title {
  font-weight: var(--fw-semibold);
  margin-bottom: var(--sp-1);
  display: -webkit-box;
  line-clamp: 2;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-date {
  font-size: var(--fs-xs);
  color: var(--color-text-tertiary);
}

/* ══════════════════════════════════════
   SUBJECTS / COURSES
   ══════════════════════════════════════ */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--sp-4);
}

@media (min-width: 1024px) {
  .subjects-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--sp-5);
  }
}

.subject-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-4);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.subject-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elevated);
  border-color: var(--color-primary);
}

.subject-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
}

.subject-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.subject-name {
  font-weight: var(--fw-semibold);
  font-size: var(--fs-md);
  flex: 1;
}

.subject-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}

/* ── Flashcard Subjects Toolbar & Mobile FAB ── */
.fc-add-subj-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  height: 42px;
  padding: 0 16px;
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-md);
  white-space: nowrap;
}

@media (max-width: 600px) {
  .fc-add-subj-btn {
    width: 42px;
    height: 42px;
    padding: 0 !important;
    border-radius: var(--radius-md);
    justify-content: center;
  }

  .fc-add-subj-btn .fc-add-btn-label {
    display: none;
  }
}

/* ══════════════════════════════════════
   LECTURES
   ══════════════════════════════════════ */
.lecture-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.lecture-card {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.lecture-card:hover {
  background: var(--color-surface-hover);
}

.lecture-card.read {
  opacity: 0.7;
}

.lecture-number {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-dim);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  flex-shrink: 0;
}

.lecture-info {
  flex: 1;
  min-width: 0;
}

.lecture-title {
  font-weight: var(--fw-medium);
}

.lecture-subtitle {
  font-size: var(--fs-xs);
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

.lecture-actions {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
}

/* ══════════════════════════════════════
   PROFILE
   ══════════════════════════════════════ */
.profile-page {
  padding-bottom: var(--sp-8);
}

.profile-header {
  text-align: center;
  padding: var(--sp-6) var(--sp-4);
  margin-bottom: var(--sp-4);
}

.profile-avatar-wrapper {
  position: relative;
  width: 96px;
  height: 96px;
  margin: 0 auto var(--sp-4);
}

.profile-avatar-edit {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.profile-name {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
}

.profile-email {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  margin-top: var(--sp-1);
}

.profile-section {
  margin-bottom: var(--sp-4);
}

.profile-section-title {
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--sp-2) 0;
}

.settings-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-in-out);
}

.settings-item:hover {
  background: var(--color-surface-hover);
}

.settings-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.settings-item-content {
  flex: 1;
}

.settings-item-title {
  font-weight: var(--fw-medium);
}

.settings-item-desc {
  font-size: var(--fs-xs);
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

/* ══════════════════════════════════════
   ABOUT PAGE
   ══════════════════════════════════════ */
.about-page {
  text-align: center;
  padding-bottom: var(--sp-8);
}

.about-logo {
  width: 80px;
  height: 80px;
  margin: var(--sp-4) auto;
}

.about-version {
  font-size: var(--fs-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--sp-6);
}

.about-section {
  margin-bottom: var(--sp-6);
  text-align: start;
}

.credit-card {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3);
  border-radius: var(--radius-md);
}

.credit-name {
  font-weight: var(--fw-semibold);
}

.credit-role {
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
}

/* ══════════════════════════════════════
   ADD SETTINGS (initial setup)
   ══════════════════════════════════════ */
.settings-setup {
  max-width: 480px;
  margin: 0 auto;
  padding: var(--sp-6);
}

.settings-setup-title {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  text-align: center;
  margin-bottom: var(--sp-6);
}

.settings-step {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

/* ── Student type selector ── */
.type-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
}

.type-card {
  padding: var(--sp-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.type-card:hover {
  border-color: var(--color-primary);
}

.type-card.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-dim);
}

.type-card .material-icons-round {
  font-size: 36px;
  color: var(--color-primary);
  margin-bottom: var(--sp-2);
}

.type-card-label {
  font-weight: var(--fw-semibold);
}

.type-card-desc {
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  margin-top: var(--sp-1);
}

/* ══════════════════════════════════════
   FLASHCARDS & QUIZ STYLES
   ══════════════════════════════════════ */
.flashcard-3d-wrapper {
  width: 100%;
  max-width: 540px;
  min-height: 280px;
  perspective: 1000px;
  margin: var(--sp-4) auto;
}

.flashcard-card-box {
  width: 100%;
  min-height: 280px;
  border-radius: var(--radius-xl);
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  background: var(--color-card-bg);
  border: 1.5px solid var(--color-card-border);
  box-shadow: var(--shadow-card);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease;
  cursor: pointer;
  user-select: none;
}

.flashcard-card-box:hover {
  box-shadow: var(--shadow-elevated);
  transform: translateY(-2px);
}

.flashcard-question-text {
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-relaxed);
  color: var(--color-text);
}

.flashcard-answer-text {
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  line-height: var(--lh-relaxed);
  color: var(--color-success);
}

.quiz-option-btn {
  width: 100%;
  text-align: start;
  justify-content: flex-start;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  font-size: var(--fs-base);
  color: var(--color-text);
  transition: all var(--duration-fast) ease;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.quiz-option-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  background: var(--color-surface-hover);
}

.quiz-option-btn.correct {
  border-color: var(--color-success) !important;
  background: rgba(76, 175, 80, 0.12) !important;
  color: var(--color-success) !important;
}

.quiz-option-btn.wrong {
  border-color: var(--color-error) !important;
  background: rgba(244, 67, 54, 0.12) !important;
  color: var(--color-error) !important;
}

/* ══════════════════════════════════════
   AI SUMMARIZER & CHATBOT PAGE STYLES
   ══════════════════════════════════════ */
.page-container:has(.summarizer-page),
#page-container:has(.summarizer-page) {
  padding: 0 !important;
  max-width: 100% !important;
  width: 100% !important;
  overflow: hidden !important;
}

.summarizer-page {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--app-bar-height));
  height: calc(100dvh - var(--app-bar-height));
  max-width: 100% !important;
  width: 100% !important;
  margin: 0 !important;
  padding: var(--sp-3) var(--sp-6);
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
}

@media (min-width: 1024px) {
  .summarizer-page {
    padding: var(--sp-4) var(--sp-8);
    max-width: 100% !important;
    width: 100% !important;
    height: calc(100vh - var(--app-bar-height));
    height: calc(100dvh - var(--app-bar-height));
  }

  .sum-messages-container {
    width: 100%;
    max-width: 100%;
  }

  .sum-chat-message {
    max-width: 82%;
  }

  .sum-input-container {
    width: 100%;
    max-width: 100%;
  }
}

/* ── Top Bar ── */
.sum-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  width: 100%;
}

.sum-file-info {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  min-width: 0;
  flex: 1;
}

.sum-ai-badge {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(41, 118, 199, 0.35);
}

.sum-file-meta {
  min-width: 0;
  flex: 1;
}

.sum-app-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: var(--color-text);
  line-height: 1.2;
}

.sum-filename {
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  line-height: 1.2;
  margin-top: 2px;
}

/* ── Action Buttons Group ── */
.sum-actions-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.sum-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius-md);
  background: var(--color-surface-variant);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  white-space: nowrap;
}

.sum-action-btn:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.sum-action-btn.icon-only {
  width: 36px;
  padding: 0;
}

.sum-action-btn .material-icons-round {
  font-size: 18px;
}

/* ── Messages Container ── */
.sum-messages-container {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: var(--sp-4) 0;
}

/* ── Chat Messages ── */
.sum-chat-message {
  display: flex;
  gap: var(--sp-2);
  max-width: 90%;
  animation: fadeIn 0.2s var(--ease-out);
}

.sum-chat-message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.sum-chat-message.bot {
  align-self: flex-start;
}

.sum-chat-bubble {
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-lg);
  font-size: var(--fs-sm);
  line-height: 1.6;
  position: relative;
  word-break: break-word;
}

.sum-chat-message.user .sum-chat-bubble {
  background: var(--gradient-primary);
  color: #ffffff;
  border-bottom-right-radius: 4px;
  box-shadow: 0 4px 14px rgba(41, 118, 199, 0.25);
}

.sum-chat-message.bot .sum-chat-bubble {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-sm);
}

[dir="rtl"] .sum-chat-message.user .sum-chat-bubble {
  border-bottom-right-radius: var(--radius-lg);
  border-bottom-left-radius: 4px;
}

[dir="rtl"] .sum-chat-message.bot .sum-chat-bubble {
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: 4px;
}

.sum-chat-bubble p {
  margin: 0 0 var(--sp-2);
}
.sum-chat-bubble p:last-child {
  margin-bottom: 0;
}

.sum-chat-bubble ul, .sum-chat-bubble ol {
  margin: var(--sp-2) 0;
  padding-inline-start: var(--sp-5);
}

.sum-chat-bubble pre {
  background: var(--color-surface-variant);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--sp-3);
  overflow-x: auto;
  font-family: monospace;
  font-size: var(--fs-xs);
  margin: var(--sp-2) 0;
}

.sum-chat-bubble code {
  background: var(--color-surface-variant);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-family: monospace;
  font-size: 0.9em;
}

/* ── Error & Retry Card ── */
.sum-error-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  background: rgba(244, 63, 94, 0.08);
  border: 1px solid rgba(244, 63, 94, 0.35);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-size: var(--fs-sm);
  max-width: 90%;
  align-self: flex-start;
}

.sum-error-header {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: var(--fw-bold);
  color: var(--color-error);
}

.sum-error-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
  flex-wrap: wrap;
}

/* ── Message Actions Bar ── */
.sum-msg-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--sp-3);
  padding-top: var(--sp-2);
  border-top: 1px solid var(--color-divider);
  flex-wrap: wrap;
}

.sum-msg-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-variant);
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  font-size: 11px;
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.sum-msg-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.sum-msg-btn .material-icons-round {
  font-size: 14px;
}

/* ── Command Chips Bar ── */
.sum-command-chips {
  display: flex;
  gap: var(--sp-2);
  padding: var(--sp-2) 0 var(--sp-2);
  flex-shrink: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  white-space: nowrap;
}
.sum-command-chips::-webkit-scrollbar { display: none; }

.sum-cmd-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}

.sum-cmd-chip:hover {
  background: var(--color-primary-dim);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* ── Chat Input Container ── */
.sum-input-container {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) 0 calc(var(--sp-2) + env(safe-area-inset-bottom, 0px));
  flex-shrink: 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  width: 100%;
}

.sum-input-wrapper {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
}

.sum-input-field {
  width: 100%;
  padding: 12px 16px;
  padding-inline-end: 40px;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: 24px;
  font-size: var(--fs-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

.sum-input-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}

.sum-send-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #ffffff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(41, 118, 199, 0.35);
  transition: transform var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
  -webkit-tap-highlight-color: transparent;
}

.sum-send-btn:hover:not(:disabled) {
  transform: scale(1.05);
  box-shadow: 0 6px 18px rgba(41, 118, 199, 0.45);
}

.sum-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ── Mobile Responsive Overrides ── */
@media (max-width: 600px) {
  .summarizer-page {
    padding: var(--sp-2) var(--sp-3);
  }
  
  .sum-btn-text {
    display: none;
  }
  
  .sum-action-btn {
    width: 36px;
    padding: 0;
  }
  
  .sum-chat-message {
    max-width: 95%;
  }

  .sum-chat-bubble {
    font-size: var(--fs-xs);
    padding: var(--sp-2) var(--sp-3);
  }

  .sum-input-field {
    padding: 10px 14px;
    font-size: var(--fs-xs);
  }

  .sum-send-btn {
    width: 40px;
    height: 40px;
  }
}