/* =========================================================
   OJOS AI — Unified Design System
   Dark Glassmorphism | Premium Medical UI
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

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

:root {
  --bg-base:       #050810;
  --bg-card:       rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.07);
  --border:        rgba(255,255,255,0.08);
  --border-hover:  rgba(99,202,183,0.35);
  --accent:        #63cab7;
  --accent2:       #4f9cf9;
  --accent-glow:   rgba(99,202,183,0.18);
  --text-primary:  #f0f4f8;
  --text-muted:    #8899aa;
  --text-dim:      #4a5568;
  --danger:        #ef4444;
  --warning:       #f59e0b;
  --success:       #10b981;
  --info:          #3b82f6;
  --radius:        16px;
  --radius-sm:     10px;
  --shadow:        0 8px 32px rgba(0,0,0,0.45);
  --shadow-glow:   0 0 40px rgba(99,202,183,0.12);
  --font:          'Inter', sans-serif;
  --font-display:  'Space Grotesk', sans-serif;
  --transition:    0.25s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated background mesh */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 10%, rgba(99,202,183,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 90%, rgba(79,156,249,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 60% 40%, rgba(139,92,246,0.04) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: rgba(99,202,183,0.3); border-radius: 3px; }

/* ── Typography ── */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: #fff; }

/* ── Glass Card ── */
.glass {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.glass:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

/* ── Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 68px;
  background: rgba(5,8,16,0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}
.navbar-brand .logo-img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--border);
}
.brand-dot { color: var(--accent); }

.navbar-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.navbar-links a {
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
}
.navbar-links a:hover,
.navbar-links a.active { color: var(--text-primary); background: var(--bg-card); }

.btn-nav {
  padding: 0.45rem 1.1rem !important;
  background: linear-gradient(135deg, var(--accent), #4a9d8a) !important;
  color: #050810 !important;
  font-weight: 600 !important;
  border-radius: var(--radius-sm) !important;
}
.btn-nav:hover { opacity: 0.9; transform: translateY(-1px); }

/* ── Flash Messages ── */
.flashes { padding: 0 2rem; margin-top: 1rem; position: relative; z-index: 10; }
.alert {
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid;
  margin-bottom: 0.5rem;
  backdrop-filter: blur(10px);
}
.alert-success  { background: rgba(16,185,129,0.12); border-color: rgba(16,185,129,0.3); color: #6ee7b7; }
.alert-danger   { background: rgba(239,68,68,0.12);  border-color: rgba(239,68,68,0.3);  color: #fca5a5; }
.alert-warning  { background: rgba(245,158,11,0.12); border-color: rgba(245,158,11,0.3); color: #fcd34d; }
.alert-info     { background: rgba(59,130,246,0.12); border-color: rgba(59,130,246,0.3); color: #93c5fd; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #4a9d8a 100%);
  color: #050810;
  box-shadow: 0 4px 20px rgba(99,202,183,0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,202,183,0.35); color: #050810; }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}
.btn-outline:hover { background: var(--bg-card); }

/* ── Hero Section ── */
.hero {
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 68px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
}

.hero-inner { max-width: 820px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(99,202,183,0.1);
  border: 1px solid rgba(99,202,183,0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 2rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 50%, var(--accent2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── Stats Bar ── */
.stats-bar {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 2rem;
  flex-wrap: wrap;
}
.stat-item {
  text-align: center;
  padding: 1.5rem 2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  min-width: 150px;
  transition: all var(--transition);
}
.stat-item:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; margin-top: 0.25rem; }

/* ── Features Section ── */
.section {
  position: relative;
  z-index: 1;
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.section-title {
  text-align: center;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 3rem;
}
.accent { color: var(--accent); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}
.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99,202,183,0.1);
  border-radius: 12px;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}
.feature-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; }
.feature-card p  { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

/* ── Footer ── */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 3rem 2rem 2rem;
  text-align: center;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.footer-links a { color: var(--text-muted); font-size: 0.9rem; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { color: var(--text-dim); font-size: 0.82rem; }
.footer-copy span { color: var(--accent); }

/* ── Auth Pages ── */
.auth-page {
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 68px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.auth-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  max-width: 900px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.auth-panel-left {
  background: linear-gradient(135deg, rgba(99,202,183,0.12) 0%, rgba(79,156,249,0.08) 100%);
  border-right: 1px solid var(--border);
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.auth-panel-left .eye-icon { font-size: 5rem; margin-bottom: 1.5rem; filter: drop-shadow(0 0 20px rgba(99,202,183,0.4)); }
.auth-panel-left h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 1rem; }
.auth-panel-left p  { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }
.auth-stats {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}
.auth-stat { text-align: center; }
.auth-stat strong { display: block; font-size: 1.3rem; color: var(--accent); font-family: var(--font-display); }
.auth-stat span   { font-size: 0.75rem; color: var(--text-muted); }

.auth-panel-right { padding: 3rem 2.5rem; }
.auth-tabs {
  display: flex;
  gap: 0;
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 2rem;
}
.auth-tab {
  flex: 1;
  padding: 0.6rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 8px;
  transition: all var(--transition);
  font-family: var(--font);
}
.auth-tab.active { background: var(--accent); color: #050810; }

.auth-form { display: none; }
.auth-form.active { display: block; }
.auth-form h3 { font-size: 1.3rem; margin-bottom: 0.4rem; }
.auth-form p  { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 1.5rem; }

.form-group { margin-bottom: 1.1rem; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--text-muted); margin-bottom: 0.4rem; text-transform: uppercase; letter-spacing: 0.05em; }
.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font);
  transition: all var(--transition);
  outline: none;
}
.form-group input:focus {
  border-color: var(--accent);
  background: rgba(99,202,183,0.06);
  box-shadow: 0 0 0 3px rgba(99,202,183,0.12);
}
.form-group input::placeholder { color: var(--text-dim); }

.btn-auth {
  width: 100%;
  padding: 0.8rem;
  background: linear-gradient(135deg, var(--accent) 0%, #4a9d8a 100%);
  color: #050810;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  transition: all var(--transition);
  margin-top: 0.5rem;
  letter-spacing: 0.02em;
}
.btn-auth:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(99,202,183,0.3); }

/* ── Prediction Page ── */
.prediction-page {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 2rem;
}
.page-header { text-align: center; margin-bottom: 2.5rem; }
.page-header h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 700; margin-bottom: 0.5rem; }
.page-header p   { color: var(--text-muted); }

/* Upload Zone */
.upload-zone {
  padding: 2.5rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 2px dashed var(--border);
  transition: all var(--transition);
  margin-bottom: 2rem;
}
.upload-zone:hover { border-color: var(--accent); background: rgba(99,202,183,0.04); }
.upload-zone h2 { font-size: 1.1rem; font-weight: 600; margin-bottom: 1.5rem; text-align: center; }

.drop-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 2.5rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.drop-area:hover { border-color: var(--border-hover); background: rgba(99,202,183,0.04); }
.drop-icon { font-size: 3rem; }
.drop-text { font-size: 1rem; font-weight: 500; }
.drop-sub  { font-size: 0.8rem; color: var(--text-muted); }
#retina_image { display: none; }

.upload-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}
#selected-file { font-size: 0.85rem; color: var(--text-muted); flex: 1; }
#selected-file.has-file { color: var(--accent); }

/* Preview */
.img-preview {
  margin-top: 1rem;
  text-align: center;
  display: none;
}
.img-preview img {
  max-height: 220px;
  max-width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  object-fit: contain;
}
.img-preview.active { display: block; }

/* Loading Overlay */
.loading-overlay {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2rem;
  text-align: center;
}
.loading-overlay.active { display: flex; }
.spinner {
  width: 48px; height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Result Card */
.result-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  animation: fadeUp 0.5s ease;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.result-header {
  padding: 1.75rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
}
.result-emoji { font-size: 2.5rem; }
.result-title { font-size: 1.5rem; font-weight: 700; }
.result-confidence { font-size: 0.9rem; color: var(--text-muted); margin-top: 0.2rem; }
.result-confidence strong { color: var(--accent); }

.result-body { padding: 2rem; display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
@media(max-width: 640px) { .result-body { grid-template-columns: 1fr; } }

.result-section h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); font-weight: 600; margin-bottom: 0.75rem; }

.advice-text { font-size: 0.92rem; color: var(--text-primary); line-height: 1.7; background: rgba(255,255,255,0.03); padding: 1rem; border-radius: var(--radius-sm); border: 1px solid var(--border); }

.tips-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.tips-list li { display: flex; align-items: flex-start; gap: 0.6rem; font-size: 0.88rem; color: var(--text-muted); }
.tips-list li::before { content: '→'; color: var(--accent); flex-shrink: 0; font-weight: 700; }

/* Prob Bars */
.prob-bars { display: flex; flex-direction: column; gap: 0.6rem; }
.prob-row { display: flex; align-items: center; gap: 0.75rem; }
.prob-label { font-size: 0.78rem; color: var(--text-muted); width: 130px; flex-shrink: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.prob-bar-wrap { flex: 1; height: 8px; background: rgba(255,255,255,0.06); border-radius: 4px; overflow: hidden; }
.prob-bar { height: 100%; border-radius: 4px; transition: width 1s ease; }
.prob-val { font-size: 0.78rem; font-weight: 600; width: 42px; text-align: right; flex-shrink: 0; }

/* Uploaded image in result */
.result-img { border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--border); grid-column: 1 / -1; }
.result-img img { width: 100%; max-height: 250px; object-fit: contain; background: rgba(0,0,0,0.2); display: block; }

/* Disclaimer */
.disclaimer {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  background: rgba(245,158,11,0.06);
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-sm);
  font-size: 0.83rem;
  color: #fcd34d;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

/* ── About Page ── */
.about-page {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 2rem;
}
.content-card {
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}
.content-card h2 { font-size: 1.25rem; margin-bottom: 1rem; }
.content-card p  { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }
.content-card ul { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; padding-left: 1.25rem; }
.content-card ul li { margin-bottom: 0.4rem; }
.content-card ul li strong { color: var(--text-primary); }
.tech-grid-about { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.75rem; margin-top: 1rem; }
.tech-badge {
  padding: 0.6rem 1rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.tech-badge strong { color: var(--accent); display: block; margin-bottom: 0.2rem; }

/* ── Diseases Page ── */
.diseases-page {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 2rem;
}
.disease-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; margin-top: 2.5rem; }
.disease-card {
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: 3px solid;
  transition: all var(--transition);
}
.disease-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-glow); border-color: var(--border-hover); }
.disease-card .d-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.disease-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.75rem; }
.disease-card p  { font-size: 0.88rem; color: var(--text-muted); line-height: 1.65; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .auth-container { grid-template-columns: 1fr; }
  .auth-panel-left { display: none; }
  .navbar-links { display: none; }
  .stats-bar { gap: 1rem; }
  .stat-item { min-width: 120px; padding: 1rem 1.25rem; }
}