/* ===================================================================
   Vision-Aid AI Academy — Stylesheet
   Brand palette inspired by visionaid.org
   Accessibility-first: high contrast, focus rings, reduced motion
   =================================================================== */

/* --- Variables --- */
:root {
  --va-navy:       #0f2b46;
  --va-blue:       #1a5276;
  --va-sky:        #2980b9;
  --va-teal:       #17a2b8;
  --va-gold:       #e8a838;
  --va-gold-light: #fdf3dc;
  --va-white:      #ffffff;
  --va-off-white:  #f7f9fb;
  --va-gray-100:   #eef1f5;
  --va-gray-200:   #dce1e8;
  --va-gray-400:   #94a3b8;
  --va-gray-600:   #5a6a7e;
  --va-gray-800:   #2d3a4a;
  --va-red:        #c0392b;

  --font-display:  'DM Serif Display', Georgia, serif;
  --font-body:     'DM Sans', system-ui, -apple-system, sans-serif;

  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     20px;
  --shadow-sm:     0 1px 3px rgba(15,43,70,0.08);
  --shadow-md:     0 4px 16px rgba(15,43,70,0.10);
  --shadow-lg:     0 8px 32px rgba(15,43,70,0.14);
  --shadow-xl:     0 16px 48px rgba(15,43,70,0.18);

  --transition:    0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  color: var(--va-gray-800);
  background: var(--va-off-white);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--va-sky); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--va-navy); }

/* Focus */
:focus-visible {
  outline: 3px solid var(--va-gold);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--va-navy);
  color: var(--va-white);
  padding: 0.75rem 1.5rem;
  z-index: 9999;
  font-weight: 600;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===================================================================
   Header
   =================================================================== */
.site-header {
  background: var(--va-navy);
  color: var(--va-white);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--va-white);
  text-decoration: none;
}
.brand:hover { color: var(--va-gold); }

.brand-icon svg { display: block; color: var(--va-gold); }

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-display); font-size: 1.15rem; letter-spacing: 0.02em; }
.brand-sub { font-size: 0.72rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.12em; color: var(--va-gold); }

.header-nav { display: flex; align-items: center; gap: 1.25rem; }
.nav-user { font-size: 0.85rem; color: var(--va-gray-200); }
.nav-link {
  font-size: 0.85rem;
  color: var(--va-gold);
  font-weight: 600;
  padding: 0.35rem 1rem;
  border: 1px solid var(--va-gold);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-link:hover { background: var(--va-gold); color: var(--va-navy); }

/* ===================================================================
   Footer
   =================================================================== */
.site-footer {
  background: var(--va-navy);
  color: var(--va-gray-400);
  margin-top: auto;
  padding: 2rem 1.5rem;
  font-size: 0.85rem;
  text-align: center;
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-brand strong { color: var(--va-gold); }
.footer-links { margin-top: 0.5rem; }
.footer-links a { color: var(--va-gray-200); }
.footer-links a:hover { color: var(--va-gold); }

/* ===================================================================
   Flash Messages
   =================================================================== */
.flash-area { max-width: 560px; margin: 1.5rem auto 0; padding: 0 1.5rem; }
.flash-msg {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
}
.flash-error { background: #fef2f2; color: var(--va-red); border: 1px solid #fecaca; }
.flash-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }

/* ===================================================================
   Login Page — Split Layout
   =================================================================== */
.login-page {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 64px);
}

.login-hero {
  background: linear-gradient(160deg, var(--va-navy) 0%, var(--va-blue) 50%, var(--va-sky) 100%);
  color: var(--va-white);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  position: relative;
  overflow: hidden;
}

.hero-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(232,168,56,0.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(41,128,185,0.2) 0%, transparent 50%);
  pointer-events: none;
}

.login-hero-content { position: relative; z-index: 1; text-align: center; max-width: 420px; }
.hero-eyeicon { margin-bottom: 2rem; opacity: 0.9; }
.hero-eyeicon svg { margin: 0 auto; }

.hero-title {
  font-family: var(--font-display);
  font-size: 2.75rem;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.hero-accent { color: var(--va-gold); }

.hero-tagline {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--va-gray-100);
}
.hero-sub {
  font-size: 0.95rem;
  color: var(--va-gray-400);
}

/* Right side: form */
.login-form-area {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  background: var(--va-white);
}

.login-card { width: 100%; max-width: 380px; }

.login-heading {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--va-navy);
  margin-bottom: 0.35rem;
}

.login-hint {
  font-size: 0.9rem;
  color: var(--va-gray-600);
  margin-bottom: 2rem;
}

.login-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--va-gray-800);
}
.form-group input {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.7rem 0.9rem;
  border: 1.5px solid var(--va-gray-200);
  border-radius: var(--radius-sm);
  background: var(--va-off-white);
  color: var(--va-gray-800);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus {
  border-color: var(--va-sky);
  box-shadow: 0 0 0 3px rgba(41,128,185,0.15);
  outline: none;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  background: var(--va-navy);
  color: var(--va-white);
  text-decoration: none;
  margin-top: 0.5rem;
}
.btn-primary:hover { background: var(--va-blue); box-shadow: var(--shadow-md); }
.btn-primary:active { transform: scale(0.98); }

.login-footer-text {
  margin-top: 2.5rem;
  font-size: 0.78rem;
  color: var(--va-gray-400);
  line-height: 1.5;
  text-align: center;
}

/* Mobile */
@media (max-width: 800px) {
  .login-page { grid-template-columns: 1fr; }
  .login-hero { padding: 2.5rem 1.5rem; min-height: 320px; }
  .hero-title { font-size: 2rem; }
  .login-form-area { padding: 2rem 1.5rem; }
}

/* ===================================================================
   Academy Home — Banner
   =================================================================== */
.academy-banner {
  background: linear-gradient(160deg, var(--va-navy), var(--va-blue));
  color: var(--va-white);
  padding: 3rem 1.5rem 2.5rem;
  text-align: center;
}
.banner-content { max-width: 720px; margin: 0 auto; }
.banner-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
}
.banner-tagline {
  font-size: 1.15rem;
  color: var(--va-gold);
  font-weight: 500;
  margin-bottom: 0.75rem;
}
.banner-sub {
  font-size: 0.95rem;
  color: var(--va-gray-200);
  line-height: 1.6;
}

/* ===================================================================
   Section Headings
   =================================================================== */
.section-heading {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--va-navy);
  text-align: center;
  margin-bottom: 1.75rem;
}

/* ===================================================================
   Tutor Cards Grid
   =================================================================== */
.tutor-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}

.tutor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.tutor-card {
  background: var(--va-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--va-gray-200);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}
.tutor-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--card-accent, var(--va-sky));
}
.tutor-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.tutor-card--coming { opacity: 0.7; }
.tutor-card--coming:hover { transform: none; box-shadow: var(--shadow-sm); }

.tutor-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.tutor-icon { font-size: 2.25rem; line-height: 1; }

.tutor-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.65rem;
  border-radius: 99px;
}
.tutor-badge--live { background: #dcfce7; color: #166534; }
.tutor-badge--beta { background: #fef3c7; color: #92400e; }
.tutor-badge--soon { background: var(--va-gray-100); color: var(--va-gray-600); }

.tutor-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--va-navy);
  margin-bottom: 0.35rem;
}

.tutor-card-tagline {
  font-size: 0.9rem;
  color: var(--card-accent, var(--va-sky));
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.tutor-card-desc {
  font-size: 0.88rem;
  color: var(--va-gray-600);
  flex: 1;
  line-height: 1.55;
}

.tutor-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}
.feature-tag {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.55rem;
  background: var(--va-gray-100);
  color: var(--va-gray-600);
  border-radius: 99px;
}

.tutor-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--va-gray-100);
}

.btn-launch {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--va-white);
  background: var(--card-accent, var(--va-sky));
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition);
  display: inline-block;
}
.btn-launch:hover { opacity: 0.88; box-shadow: var(--shadow-md); color: var(--va-white); }
.btn-launch--disabled {
  background: var(--va-gray-200);
  color: var(--va-gray-400);
  cursor: default;
  pointer-events: none;
}
.tutor-version { font-size: 0.75rem; color: var(--va-gray-400); font-weight: 500; }

/* ===================================================================
   Info Section
   =================================================================== */
.info-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

.info-card {
  background: var(--va-white);
  border: 1px solid var(--va-gray-200);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
}
.info-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.info-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--va-navy);
  margin-bottom: 0.5rem;
}
.info-card p {
  font-size: 0.85rem;
  color: var(--va-gray-600);
  line-height: 1.5;
}

/* ===================================================================
   Coming Soon Page
   =================================================================== */
.coming-soon-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
}
.coming-soon-card {
  text-align: center;
  max-width: 520px;
  background: var(--va-white);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.coming-soon-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: var(--card-accent, var(--va-gray-400));
}
.coming-icon { font-size: 3.5rem; display: block; margin-bottom: 1rem; }
.coming-title { font-family: var(--font-display); font-size: 1.5rem; color: var(--va-navy); margin-bottom: 0.5rem; }
.coming-tagline { font-size: 1rem; color: var(--card-accent, var(--va-sky)); font-weight: 600; margin-bottom: 1rem; }
.coming-desc { font-size: 0.9rem; color: var(--va-gray-600); line-height: 1.6; margin-bottom: 1.5rem; }
.coming-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.4rem 1.25rem;
  background: var(--va-gray-100);
  color: var(--va-gray-600);
  border-radius: 99px;
  margin-bottom: 1.5rem;
}
.coming-note { font-size: 0.85rem; color: var(--va-gray-400); }

/* ===================================================================
   404 Page
   =================================================================== */
.error-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
}
.error-card { text-align: center; max-width: 420px; }
.error-code {
  font-family: var(--font-display);
  font-size: 6rem;
  color: var(--va-gray-200);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.error-card h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--va-navy);
  margin-bottom: 0.75rem;
}
.error-card p {
  font-size: 0.95rem;
  color: var(--va-gray-600);
  margin-bottom: 1.5rem;
}