/* Modern SaaS-style Educational Dashboard UI */
:root {
  --saas-bg: #f3f6f9;
  --saas-surface: #ffffff;
  --saas-text: #1e293b;
  --saas-text-soft: #64748b;
  --saas-border: #e2e8f0;
  
  --saas-blue: #3b82f6;
  --saas-blue-light: #eff6ff;
  --saas-blue-hover: #2563eb;
  
  --saas-coral: #fb7185;
  --saas-coral-hover: #e11d48;

  --saas-gradient-blue: linear-gradient(135deg, #3b82f6 0%, #2dd4bf 100%);
  --saas-gradient-coral: linear-gradient(135deg, #fb7185 0%, #facc15 100%);

  --saas-radius: 16px;
  --saas-radius-lg: 24px;
  --saas-radius-sm: 8px;

  --saas-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
  --saas-shadow-hover: 0 10px 25px -4px rgba(15, 23, 42, 0.1);
}

body.saas-layout-active {
  margin: 0;
  background-color: var(--saas-bg);
  color: var(--saas-text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

.saas-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.saas-sidebar {
  width: 260px;
  background: var(--saas-surface);
  border-right: 1px solid var(--saas-border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  position: fixed;
  height: 100vh;
  top: 0;
  left: 0;
  z-index: 10;
}

.saas-sidebar-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  padding: 0 8px;
}

.saas-avatar {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--saas-gradient-blue);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.1rem;
}

.saas-profile-info h3 {
  margin: 0;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--saas-text);
}

.saas-profile-info span {
  font-size: 0.8rem;
  color: var(--saas-text-soft);
}

.saas-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.saas-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--saas-radius-sm);
  color: var(--saas-text-soft);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s;
  border: none;
  background: none;
  width: 100%;
  cursor: pointer;
  font-size: 0.95rem;
}

.saas-nav-item:hover {
  background-color: #f1f5f9;
  color: var(--saas-text);
}

.saas-nav-item.active {
  background-color: var(--saas-blue-light);
  color: var(--saas-blue);
}

.saas-nav-bottom {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--saas-border);
}

/* Main Content */
.saas-main {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
}

/* Topbar */
.saas-topbar {
  background: var(--saas-surface);
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--saas-border);
}

.saas-search-container {
  position: relative;
  width: 400px;
}

.saas-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--saas-text-soft);
  width: 18px;
  height: 18px;
}

.saas-search-input {
  width: 100%;
  background: var(--saas-bg);
  border: 1px solid transparent;
  padding: 10px 16px 10px 42px;
  border-radius: 20px;
  outline: none;
  transition: border 0.2s;
  font-size: 0.95rem;
}

.saas-search-input:focus {
  border-color: var(--saas-blue);
  background: var(--saas-surface);
}

.saas-action-btn-float {
  background: var(--saas-gradient-blue);
  color: white;
  border: none;
  padding: 10px 24px;
  border-radius: 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
  transition: transform 0.2s;
}

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

/* Content Area */
.saas-content {
  padding: 40px 32px;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.saas-page-title {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 20px 0;
  font-family: 'Space Grotesk', inherit;
}

/* Button & Filters */
.saas-btn-row {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
}

.saas-btn-gradient-blue {
  background: var(--saas-gradient-blue);
  color: white;
  border: none;
  border-radius: var(--saas-radius-sm);
  padding: 10px 20px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 20px;
}

.saas-btn-gradient-coral {
  background: var(--saas-gradient-coral);
  color: white;
  border: none;
  border-radius: var(--saas-radius-sm);
  padding: 10px 20px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 20px;
}

.saas-filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
}

.saas-filter-select {
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid var(--saas-border);
  background: var(--saas-surface);
  color: var(--saas-text-soft);
  outline: none;
  cursor: pointer;
}

/* Card Grid */
.saas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.saas-card {
  background: var(--saas-surface);
  border-radius: var(--saas-radius);
  padding: 24px;
  box-shadow: var(--saas-shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

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

.saas-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 12px 0;
}

.saas-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.saas-pill-outline {
  font-size: 0.75rem;
  border: 1px solid var(--saas-blue);
  color: var(--saas-blue);
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 500;
}

.saas-pill-fill {
  font-size: 0.75rem;
  background: #f1f5f9;
  color: var(--saas-text-soft);
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 500;
}

.saas-card-desc {
  font-size: 0.9rem;
  color: var(--saas-text-soft);
  margin-bottom: 24px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.saas-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--saas-border);
  padding-top: 16px;
  font-size: 0.8rem;
  color: var(--saas-text-soft);
}

.saas-pagination {
  display: flex;
  justify-content: center;
  margin-top: 40px;
  gap: 8px;
}

.saas-page-dot {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--saas-surface);
  border: 1px solid var(--saas-border);
  cursor: pointer;
  font-size: 0.9rem;
}
.saas-page-dot.active {
  background: var(--saas-blue);
  color: white;
  border-color: var(--saas-blue);
}

/* ===== Mobile Bottom Tab Bar ===== */
.saas-bottom-nav {
  display: none;
}

@media (max-width: 768px) {
  .saas-sidebar {
    display: none;
  }

  .saas-main {
    margin-left: 0;
    padding-bottom: 72px;
  }

  .saas-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--saas-surface);
    border-top: 1px solid var(--saas-border);
    justify-content: space-around;
    align-items: center;
    z-index: 100;
    padding: 0 4px;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
  }

  .saas-bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    font-size: 0.6rem;
    color: var(--saas-text-soft);
    text-decoration: none;
    padding: 6px 4px;
    min-width: 48px;
    min-height: 48px;
    justify-content: center;
    border-radius: 12px;
    transition: background 0.15s, color 0.15s;
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 500;
    line-height: 1.2;
  }

  .saas-bottom-nav-item:hover,
  .saas-bottom-nav-item:active {
    background: var(--saas-blue-light);
  }

  .saas-bottom-nav-item.active {
    color: var(--saas-blue);
  }

  .saas-bottom-nav-item svg {
    width: 22px;
    height: 22px;
  }

  .saas-topbar {
    padding: 0 12px;
    height: 56px;
  }

  .saas-topbar .saas-search-container {
    position: static;
    width: auto;
    flex: 0 0 auto;
  }

  .saas-topbar .saas-search-input {
    display: none;
  }

  .saas-topbar .saas-search-icon {
    position: static;
    transform: none;
    cursor: pointer;
    width: 20px;
    height: 20px;
    padding: 10px;
  }

  .saas-search-container.expanded {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 200;
    display: flex;
    align-items: flex-start;
    padding: 8px 12px;
  }

  .saas-search-container.expanded .saas-search-input {
    display: block;
    width: 100%;
    border-radius: 20px;
    height: 44px;
    font-size: 16px;
    padding: 0 16px 0 42px;
    box-shadow: var(--saas-shadow-hover);
  }

  .saas-search-container.expanded .saas-search-icon {
    position: absolute;
    left: 24px;
    top: 20px;
    z-index: 201;
  }

  .saas-content {
    padding: 20px 12px;
  }

  .saas-page-title {
    font-size: 1.5rem;
    margin-bottom: 16px;
  }

  .saas-btn-row {
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
  }

  .saas-btn-gradient-blue,
  .saas-btn-gradient-coral {
    flex: 1;
    min-width: 0;
    text-align: center;
    padding: 10px 12px;
    font-size: 0.85rem;
  }

  .saas-filter-bar {
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
  }

  .saas-filter-select {
    flex: 1;
    min-width: 0;
    font-size: 0.85rem;
  }

  .saas-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .saas-card {
    padding: 16px;
    border-radius: 12px;
  }

  .saas-action-btn-float {
    padding: 8px 16px;
    font-size: 0.8rem;
    white-space: nowrap;
  }

  .saas-topbar > div:first-child span {
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  .saas-content {
    padding: 16px 8px;
  }

  .saas-page-title {
    font-size: 1.3rem;
  }

  .saas-card {
    padding: 14px;
  }

  .saas-bottom-nav-item {
    font-size: 0.55rem;
    min-width: 40px;
  }

  .saas-bottom-nav-item svg {
    width: 20px;
    height: 20px;
  }

  .saas-btn-row {
    flex-direction: column;
    gap: 8px;
  }

  .saas-pagination {
    gap: 4px;
    margin-top: 24px;
  }

  .saas-page-dot {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }
}

@media (max-width: 360px) {
  .saas-topbar > div:first-child span {
    font-size: 0.85rem;
  }

  .saas-bottom-nav {
    height: 58px;
  }

  .saas-bottom-nav-item {
    font-size: 0.5rem;
    min-width: 36px;
    padding: 4px 2px;
  }

  .saas-content {
    padding: 12px 6px;
  }

  .saas-page-title {
    font-size: 1.2rem;
  }
}