@import url('/ai-school/stitch.css');
/**
 * FreeStudyAdda AI School - Unified Design System & UI Stylesheet
 * Phase 1 Architecture
 */

:root {
  --primary-navy: #0e2752;
  --primary-dark: #081a38;
  --primary-blue: #1e58c8;
  --primary-light: #eef4ff;
  --accent-teal: #0d826a;
  --accent-teal-bg: #e6f6f2;
  --accent-amber: #d97706;
  --accent-amber-bg: #fef3c7;
  --accent-purple: #6d28d9;
  --accent-purple-bg: #f3e8ff;
  --accent-rose: #be123c;
  --accent-rose-bg: #ffe4e6;
  
  --text-main: #182f55;
  --text-muted: #5e7290;
  --text-dim: #8c9eb5;
  
  --surface-bg: #f5f8fc;
  --surface-card: #ffffff;
  --surface-subtle: #f8fbff;
  --border-line: #dbe4f3;
  --border-focus: #1e58c8;
  
  --shadow-sm: 0 2px 6px rgba(16, 44, 89, 0.05);
  --shadow-md: 0 8px 24px rgba(16, 44, 89, 0.08);
  --shadow-lg: 0 16px 36px rgba(16, 44, 89, 0.12);
  
  --font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Noto Sans Devanagari", "Segoe UI", Arial, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  
  --container-max: 1200px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--surface-bg);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Accessibility Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid #6393ed;
  outline-offset: 2px;
}

/* Base Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--primary-navy);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: #123c8b;
}

/* Layout Containers */
.fsa-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Global Top Navigation Bar */
.fsa-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-line);
}

.fsa-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 16px;
}

.fsa-brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fsa-brand-logo {
  font-size: 20px;
  font-weight: 900;
  color: var(--primary-navy);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.03em;
}

.fsa-badge-ai {
  font-size: 11px;
  font-weight: 800;
  background: linear-gradient(135deg, #1e58c8, #0d826a);
  color: #ffffff;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.fsa-nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.fsa-nav-item a {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 700;
  color: #334e77;
}

.fsa-nav-item a:hover,
.fsa-nav-item a.active {
  background: var(--primary-light);
  color: var(--primary-blue);
}

.fsa-nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Language Selector Pill */
.fsa-lang-selector {
  display: flex;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-pill);
  padding: 2px 4px;
  font-size: 12px;
  font-weight: 700;
}

.fsa-lang-btn {
  border: none;
  background: transparent;
  padding: 5px 9px;
  border-radius: var(--radius-pill);
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 700;
  transition: all 0.15s ease;
}

.fsa-lang-btn.active {
  background: var(--primary-blue);
  color: #ffffff;
}

.fsa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 13.5px;
  font-weight: 750;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.fsa-btn-primary {
  background: linear-gradient(135deg, #1e58c8, #103c8c);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(30, 88, 200, 0.25);
}

.fsa-btn-primary:hover {
  background: linear-gradient(135deg, #164bb3, #0d2f70);
  color: #ffffff;
}

.fsa-btn-secondary {
  background: #ffffff;
  color: var(--primary-navy);
  border-color: var(--border-line);
}

.fsa-btn-secondary:hover {
  background: var(--surface-subtle);
  border-color: #bccde5;
}

.fsa-btn-accent {
  background: var(--accent-teal);
  color: #ffffff;
}

.fsa-btn-accent:hover {
  background: #0a6955;
  color: #ffffff;
}

.fsa-btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* Mobile Toggle */
.fsa-mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-line);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 18px;
  cursor: pointer;
  color: var(--primary-navy);
}

/* Breadcrumbs */
.fsa-breadcrumb-bar {
  background: #ffffff;
  border-bottom: 1px solid var(--border-line);
  padding: 10px 0;
  font-size: 12.5px;
}

.fsa-breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.fsa-breadcrumb-list li+li:before {
  content: "/";
  color: var(--text-dim);
  margin-right: 8px;
}

.fsa-breadcrumb-list a {
  color: var(--text-muted);
  font-weight: 600;
}

.fsa-breadcrumb-list a:hover {
  color: var(--primary-blue);
}

.fsa-breadcrumb-list span[aria-current="page"] {
  color: var(--primary-navy);
  font-weight: 750;
}

/* Hero Section */
.fsa-hero {
  background: radial-gradient(circle at 90% 10%, #e2ecff 0%, transparent 40%), linear-gradient(135deg, #ffffff 0%, #edf3fc 100%);
  padding: 44px 0 52px;
  border-bottom: 1px solid var(--border-line);
}

.fsa-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.85fr);
  align-items: center;
  gap: 36px;
}

.fsa-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  font-weight: 850;
  color: var(--accent-amber);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.fsa-eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(13, 130, 106, 0.2);
}

.fsa-hero-title {
  font-size: clamp(32px, 4.2vw, 54px);
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.fsa-hero-title span {
  color: var(--primary-blue);
}

.fsa-hero-description {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 620px;
  line-height: 1.65;
  margin-bottom: 24px;
}

.fsa-hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.fsa-perks-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12.5px;
  color: #3b5a80;
  font-weight: 650;
}

.fsa-perks-row span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Cards & Grid Systems */
.fsa-section {
  padding: 48px 0;
}

.fsa-section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.fsa-section-kicker {
  font-size: 11px;
  font-weight: 850;
  color: var(--accent-teal);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.fsa-section-title {
  font-size: clamp(22px, 2.5vw, 32px);
  color: var(--primary-navy);
}

.fsa-section-subtitle {
  color: var(--text-muted);
  font-size: 14.5px;
  max-width: 650px;
  margin-top: 6px;
}

.fsa-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.fsa-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.fsa-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

/* Category Card */
.fsa-card {
  background: var(--surface-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  position: relative;
}

.fsa-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #b5cefc;
}

.fsa-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
  background: var(--primary-light);
  color: var(--primary-blue);
}

.fsa-card-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary-navy);
  margin-bottom: 8px;
}

.fsa-card-text {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 16px;
  flex-grow: 1;
}

.fsa-card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  font-weight: 750;
  border-top: 1px solid #edf2f9;
  padding-top: 14px;
}

/* Badges & Chips */
.fsa-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 11.5px;
  font-weight: 750;
  border: 1px solid transparent;
}

.fsa-chip-blue {
  background: var(--primary-light);
  color: var(--primary-blue);
  border-color: #c9dbfa;
}

.fsa-chip-green {
  background: var(--accent-teal-bg);
  color: var(--accent-teal);
  border-color: #b6e9dc;
}

.fsa-chip-amber {
  background: var(--accent-amber-bg);
  color: var(--accent-amber);
  border-color: #fde68a;
}

.fsa-chip-purple {
  background: var(--accent-purple-bg);
  color: var(--accent-purple);
  border-color: #e9d5ff;
}

/* Interactive Tabs */
.fsa-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 2px solid var(--border-line);
  margin-bottom: 24px;
  overflow-x: auto;
  scrollbar-width: none;
}

.fsa-tabs::-webkit-scrollbar {
  display: none;
}

.fsa-tab-btn {
  background: transparent;
  border: none;
  padding: 12px 18px;
  font-size: 14px;
  font-weight: 750;
  color: var(--text-muted);
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.fsa-tab-btn:hover {
  color: var(--primary-blue);
}

.fsa-tab-btn.active {
  color: var(--primary-blue);
}

.fsa-tab-btn.active:after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-blue);
  border-radius: 3px 3px 0 0;
}

/* Search and Filter Controls */
.fsa-controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.fsa-search-wrap {
  position: relative;
  flex: 1;
  min-width: 260px;
}

.fsa-search-input {
  width: 100%;
  padding: 11px 16px 11px 40px;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  font-size: 13.5px;
  color: var(--text-main);
  outline: none;
  transition: border-color 0.15s ease;
}

.fsa-search-input:focus {
  border-color: var(--border-focus);
}

.fsa-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 15px;
  pointer-events: none;
}

.fsa-filter-select {
  padding: 11px 16px;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  background: #ffffff;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--text-main);
  cursor: pointer;
}

/* Virtual Classroom Interface */
.fsa-classroom-wrapper {
  background: #09172e;
  color: #ffffff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  margin-bottom: 32px;
}

.fsa-classroom-topbar {
  background: #0e2448;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #1a396e;
  flex-wrap: wrap;
  gap: 12px;
}

.fsa-classroom-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(320px, 1fr);
  min-height: 520px;
}

.fsa-classroom-stage {
  padding: 20px;
  display: flex;
  flex-direction: column;
  background: radial-gradient(circle at 50% 50%, #10264d 0%, #08152b 100%);
  position: relative;
}

.fsa-whiteboard {
  flex: 1;
  background: #ffffff;
  color: #1a2e4c;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 380px;
}

.fsa-whiteboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #e1e9f4;
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.fsa-whiteboard-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.fsa-wb-tool {
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid #d3e1f2;
  background: #f7faff;
  color: #274873;
  cursor: pointer;
}

.fsa-wb-tool.active {
  background: var(--primary-blue);
  color: #ffffff;
  border-color: var(--primary-blue);
}

.fsa-whiteboard-canvas {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  background: repeating-linear-gradient(0deg, #f9fbff, #f9fbff 24px, #e9eff9 25px);
  border-radius: var(--radius-sm);
  border: 1px dashed #cadcf2;
}

.fsa-classroom-controls {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.fsa-classroom-sidebar {
  background: #0b1d3a;
  border-left: 1px solid #1a396e;
  display: flex;
  flex-direction: column;
}

.fsa-sidebar-tabs {
  display: flex;
  border-bottom: 1px solid #1a396e;
}

.fsa-sb-tab {
  flex: 1;
  padding: 12px;
  font-size: 13px;
  font-weight: 750;
  text-align: center;
  background: transparent;
  border: none;
  color: #8da4c8;
  cursor: pointer;
}

.fsa-sb-tab.active {
  color: #ffffff;
  background: #102a54;
  border-bottom: 2px solid #3b82f6;
}

.fsa-sidebar-content {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Placeholder Announcement Banner */
.fsa-placeholder-box {
  background: linear-gradient(135deg, #f0f7ff, #e6f0fd);
  border: 1.5px dashed #93b9f4;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 18px 0;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  color: #173868;
}

.fsa-placeholder-badge {
  background: #2563eb;
  color: #ffffff;
  font-size: 11px;
  font-weight: 850;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

/* Dashboard Stat Tiles */
.fsa-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.fsa-stat-tile {
  background: var(--surface-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-sm);
}

.fsa-stat-label {
  font-size: 12px;
  font-weight: 750;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.fsa-stat-val {
  font-size: 28px;
  font-weight: 850;
  color: var(--primary-navy);
  line-height: 1.1;
  margin-bottom: 4px;
}

.fsa-stat-note {
  font-size: 12px;
  color: var(--accent-teal);
  font-weight: 650;
}

/* Progress Bar */
.fsa-progress {
  width: 100%;
  height: 8px;
  background: #e2eaf5;
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin: 8px 0;
}

.fsa-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #1e58c8, #0d826a);
  border-radius: var(--radius-pill);
  transition: width 0.3s ease;
}

/* Footer */
.fsa-footer {
  margin-top: auto;
  background: var(--primary-dark);
  color: #cbdbee;
  padding: 48px 0 24px;
  border-top: 1px solid #162f59;
}

.fsa-footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 36px;
}

.fsa-footer-col h4 {
  color: #ffffff;
  font-size: 15px;
  margin-bottom: 16px;
}

.fsa-footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fsa-footer-links a {
  color: #a0b6d4;
  font-size: 13.5px;
}

.fsa-footer-links a:hover {
  color: #ffffff;
}

.fsa-footer-bottom {
  border-top: 1px solid #172d52;
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12.5px;
  color: #7b94b7;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .fsa-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .fsa-footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .fsa-classroom-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .fsa-container {
    padding-left: 18px;
    padding-right: 18px;
  }
  
  .fsa-hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .fsa-mobile-toggle {
    display: block;
  }
  
  .fsa-nav-menu {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-line);
    box-shadow: 0 12px 28px rgba(16, 44, 89, 0.12);
  }
  
  .fsa-nav-menu.open {
    display: flex;
  }
  
  .fsa-grid-3,
  .fsa-grid-2 {
    grid-template-columns: 1fr;
  }
  
  .fsa-footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .fsa-hero {
    padding: 32px 0 40px;
  }
}

@media (max-width: 480px) {
  .fsa-grid-4 {
    grid-template-columns: 1fr;
  }
  .fsa-stat-grid {
    grid-template-columns: 1fr;
  }
  .fsa-hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .fsa-btn {
    width: 100%;
  }
}