/* ============================================================
   SpaceLens AI — Custom Stylesheet
   Space-exploration theme: dark navy / deep blue / cyan accent
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;800;900&family=Exo+2:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  --sl-bg:            #030712;
  --sl-surface:       #0d1117;
  --sl-surface-2:     #161b22;
  --sl-surface-3:     #1c2333;
  --sl-border:        rgba(56, 189, 248, 0.15);
  --sl-border-solid:  #1e2d3d;

  --sl-primary:       #38bdf8;        /* cyan */
  --sl-primary-glow:  rgba(56, 189, 248, 0.35);
  --sl-secondary:     #818cf8;        /* indigo */
  --sl-accent:        #a78bfa;        /* violet */
  --sl-success:       #4ade80;
  --sl-warning:       #fbbf24;
  --sl-danger:        #f87171;

  --sl-text:          #e2e8f0;
  --sl-text-muted:    #8b98a9;
  --sl-text-dim:      #4a5568;

  --sl-font-heading:  'Orbitron', sans-serif;
  --sl-font-body:     'Exo 2', sans-serif;

  --sl-radius:        0.75rem;
  --sl-radius-lg:     1.25rem;
  --sl-radius-xl:     1.75rem;

  --sl-transition:    0.25s ease;
  --sl-transition-lg: 0.4s ease;
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--sl-bg);
  color: var(--sl-text);
  font-family: var(--sl-font-body);
  font-size: 15px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6,
.font-heading {
  font-family: var(--sl-font-heading);
  letter-spacing: 0.04em;
}

.text-cyan    { color: var(--sl-primary)   !important; }
.text-violet  { color: var(--sl-accent)    !important; }
.text-indigo  { color: var(--sl-secondary) !important; }
.text-muted   { color: var(--sl-text-muted) !important; }

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar               { width: 6px; }
::-webkit-scrollbar-track         { background: var(--sl-bg); }
::-webkit-scrollbar-thumb         { background: var(--sl-surface-3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover   { background: var(--sl-primary); }

/* ╔══════════════════════════════════════════════════════════╗
   ║  STAR-FIELD BACKGROUND                                   ║
   ╚══════════════════════════════════════════════════════════╝ */
.stars-bg {
  position: fixed;
  inset: 0;
  z-index: 0;           /* Base layer — all page content sits at z-index: 1+ */
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%,   rgba(56,189,248,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 20% 80%,  rgba(129,140,248,0.05) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 80% 20%,  rgba(167,139,250,0.04) 0%, transparent 70%),
    var(--sl-bg);
}

/* ── Animated twinkling dots ─────────────────────────────── */
.stars-bg::before,
.stars-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at  10%  20%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at  30%  60%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at  50%  10%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at  70%  80%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at  90%  35%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at  15%  75%, rgba(56,189,248,0.8) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at  45%  50%, rgba(129,140,248,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at  80%   5%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at  25%  90%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at  60%  25%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at  5%   45%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at  95%  65%, rgba(255,255,255,0.5) 0%, transparent 100%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  animation: twinkle 6s infinite alternate ease-in-out;
}

.stars-bg::after {
  background-image:
    radial-gradient(1px 1px at  8%   55%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at  38%  22%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at  55%  85%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at  78%  40%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at  92%  12%, rgba(167,139,250,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at  22%  33%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at  65%  70%, rgba(255,255,255,0.5) 0%, transparent 100%);
  animation-delay: 3s;
  animation-duration: 8s;
}

@keyframes twinkle {
  0%   { opacity: 0.6; }
  50%  { opacity: 1;   }
  100% { opacity: 0.7; }
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  GLASSMORPHISM CARD                                      ║
   ╚══════════════════════════════════════════════════════════╝ */
.glass-card {
  background: rgba(13, 17, 23, 0.75);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--sl-border);
  border-radius: var(--sl-radius-lg);
  transition: border-color var(--sl-transition), box-shadow var(--sl-transition);
}

.glass-card:hover {
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.08);
}

.glass-card-dark {
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--sl-border);
  border-radius: var(--sl-radius-lg);
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  NAVBAR                                                  ║
   ╚══════════════════════════════════════════════════════════╝ */
.sl-navbar {
  background: rgba(3, 7, 18, 0.9) !important;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--sl-border);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 1030;
  transition: background var(--sl-transition);
}

.sl-navbar .navbar-brand {
  font-family: var(--sl-font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--sl-primary) !important;
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sl-navbar .navbar-brand .brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--sl-primary), var(--sl-accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}

.sl-navbar .nav-link {
  color: var(--sl-text-muted) !important;
  font-family: var(--sl-font-body);
  font-weight: 500;
  font-size: 0.875rem;
  letter-spacing: 0.03em;
  padding: 0.4rem 0.85rem !important;
  border-radius: var(--sl-radius);
  transition: color var(--sl-transition), background var(--sl-transition);
}

.sl-navbar .nav-link:hover,
.sl-navbar .nav-link.active {
  color: var(--sl-primary) !important;
  background: rgba(56, 189, 248, 0.08);
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  BUTTONS                                                 ║
   ╚══════════════════════════════════════════════════════════╝ */
.btn-sl-primary {
  background: linear-gradient(135deg, var(--sl-primary) 0%, var(--sl-secondary) 100%);
  border: none;
  color: #fff;
  font-family: var(--sl-font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.65rem 1.6rem;
  border-radius: var(--sl-radius);
  transition: opacity var(--sl-transition), box-shadow var(--sl-transition), transform var(--sl-transition);
  text-transform: uppercase;
}

.btn-sl-primary:hover {
  opacity: 0.9;
  box-shadow: 0 0 20px var(--sl-primary-glow);
  transform: translateY(-1px);
  color: #fff;
}

.btn-sl-outline {
  background: transparent;
  border: 1px solid var(--sl-primary);
  color: var(--sl-primary);
  font-family: var(--sl-font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.65rem 1.6rem;
  border-radius: var(--sl-radius);
  transition: background var(--sl-transition), box-shadow var(--sl-transition), transform var(--sl-transition);
  text-transform: uppercase;
}

.btn-sl-outline:hover {
  background: rgba(56, 189, 248, 0.1);
  box-shadow: 0 0 16px var(--sl-primary-glow);
  transform: translateY(-1px);
  color: var(--sl-primary);
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  SIDEBAR                                                 ║
   ╚══════════════════════════════════════════════════════════╝ */
.sl-sidebar {
  width: 240px;
  min-height: 100vh;
  background: var(--sl-surface);
  border-right: 1px solid var(--sl-border-solid);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 0;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 2;           /* above sl-app-layout z-index:1, below navbar z-index:1030 */
}

.sl-sidebar .sidebar-brand {
  font-family: var(--sl-font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--sl-primary);
  letter-spacing: 0.08em;
  padding: 0 1.25rem 1.5rem;
  border-bottom: 1px solid var(--sl-border-solid);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sl-sidebar .nav-section-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sl-text-dim);
  padding: 0.5rem 1.25rem 0.25rem;
}

.sl-sidebar .nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--sl-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.6rem 1.25rem;
  border-radius: 0;
  transition: color var(--sl-transition), background var(--sl-transition), border-color var(--sl-transition);
  border-left: 3px solid transparent;
  text-decoration: none;
}

.sl-sidebar .nav-link i {
  font-size: 1rem;
  width: 1.2rem;
  text-align: center;
  flex-shrink: 0;
}

.sl-sidebar .nav-link:hover {
  color: var(--sl-primary);
  background: rgba(56, 189, 248, 0.06);
  border-left-color: rgba(56, 189, 248, 0.4);
}

.sl-sidebar .nav-link.active {
  color: var(--sl-primary);
  background: rgba(56, 189, 248, 0.1);
  border-left-color: var(--sl-primary);
  font-weight: 600;
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  DASHBOARD LAYOUT                                        ║
   ╚══════════════════════════════════════════════════════════╝ */
.sl-app-layout {
  display: flex;
  min-height: calc(100vh - 57px);
  position: relative;   /* establish stacking context above stars-bg */
  z-index: 1;
}

.sl-main-content {
  flex: 1;
  min-width: 0;
  padding: 2rem;
  overflow-y: auto;
  color: var(--sl-text);
  position: relative;
  z-index: 1;
}

/* Ensure all headings inside the app shell are visibly white/light */
.sl-main-content h1,
.sl-main-content h2,
.sl-main-content h3,
.sl-main-content h4,
.sl-main-content h5,
.sl-main-content h6,
.sl-main-content .font-heading {
  color: var(--sl-text);
}

/* Page header paragraphs */
.sl-main-content > div > p,
.sl-main-content > div > div > p {
  color: var(--sl-text-muted);
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  STAT CARDS                                              ║
   ╚══════════════════════════════════════════════════════════╝ */
.stat-card {
  background: var(--sl-surface-2);
  border: 1px solid var(--sl-border-solid);
  border-radius: var(--sl-radius-lg);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--sl-transition), box-shadow var(--sl-transition);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--sl-primary), var(--sl-accent));
  opacity: 0;
  transition: opacity var(--sl-transition);
}

.stat-card:hover { border-color: var(--sl-primary); }
.stat-card:hover::before { opacity: 1; }

.stat-card .stat-value {
  font-family: var(--sl-font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--sl-primary);
  line-height: 1.1;
}

.stat-card .stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sl-text-muted);
  margin-top: 0.25rem;
}

.stat-card .stat-icon {
  font-size: 2.5rem;
  opacity: 0.12;
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--sl-primary);
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  LANDING PAGE                                            ║
   ╚══════════════════════════════════════════════════════════╝ */

/* Hero */
.sl-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.sl-hero .hero-content {
  position: relative;
  z-index: 2;
}

.sl-hero .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 50px;
  padding: 0.3rem 0.9rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--sl-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  animation: fadeInDown 0.8s ease both;
}

.sl-hero .hero-title {
  font-family: var(--sl-font-heading);
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.02em;
  animation: fadeInUp 0.9s ease 0.1s both;
}

.sl-hero .hero-title .highlight {
  background: linear-gradient(135deg, var(--sl-primary), var(--sl-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sl-hero .hero-subtitle {
  font-size: 1.1rem;
  color: var(--sl-text-muted);
  max-width: 560px;
  line-height: 1.8;
  margin-top: 1.25rem;
  animation: fadeInUp 1s ease 0.2s both;
}

.sl-hero .hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  animation: fadeInUp 1s ease 0.35s both;
}

/* Hero orbit rings */
.hero-orb {
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 600px;
  height: 600px;
  pointer-events: none;
  z-index: 1;
  opacity: 0.55;
}

.hero-orb .ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.hero-orb .ring-1 {
  inset: 0;
  animation: spinOrbit 24s linear infinite;
}

.hero-orb .ring-2 {
  inset: 60px;
  border-color: rgba(129, 140, 248, 0.2);
  animation: spinOrbit 18s linear infinite reverse;
}

.hero-orb .ring-3 {
  inset: 130px;
  border-color: rgba(167, 139, 250, 0.15);
  animation: spinOrbit 12s linear infinite;
}

.hero-orb .planet {
  position: absolute;
  inset: 180px;
  background: radial-gradient(circle at 35% 35%,
    rgba(56, 189, 248, 0.2),
    rgba(56, 189, 248, 0.05) 40%,
    rgba(0,0,0,0) 70%);
  border-radius: 50%;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.hero-orb .dot {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sl-primary);
  box-shadow: 0 0 8px var(--sl-primary);
  top: 50%;
  left: -4px;
  margin-top: -4px;
}

.hero-orb .ring-1 .dot { background: var(--sl-primary);    box-shadow: 0 0 8px var(--sl-primary); }
.hero-orb .ring-2 .dot { background: var(--sl-secondary);  box-shadow: 0 0 8px var(--sl-secondary); }
.hero-orb .ring-3 .dot { background: var(--sl-accent);     box-shadow: 0 0 8px var(--sl-accent); }

@keyframes spinOrbit { to { transform: rotate(360deg); } }

/* ── Section headers ─────────────────────────────────────── */
.sl-section {
  padding: 5rem 0;
  position: relative;
  z-index: 1;
}

.sl-section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.sl-section-header .section-eyebrow {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sl-primary);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 50px;
  padding: 0.25rem 0.85rem;
  margin-bottom: 1rem;
}

.sl-section-header h2 {
  font-family: var(--sl-font-heading);
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--sl-text);
}

.sl-section-header p {
  color: var(--sl-text-muted);
  max-width: 540px;
  margin: 0.75rem auto 0;
  font-size: 1rem;
}

/* ── Feature Cards ───────────────────────────────────────── */
.feature-card {
  background: var(--sl-surface-2);
  border: 1px solid var(--sl-border-solid);
  border-radius: var(--sl-radius-lg);
  padding: 2rem 1.75rem;
  height: 100%;
  transition: border-color var(--sl-transition), transform var(--sl-transition), box-shadow var(--sl-transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -20%, rgba(56,189,248,0.06) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--sl-transition-lg);
}

.feature-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(56, 189, 248, 0.08);
}

.feature-card:hover::before { opacity: 1; }

.feature-card .feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--sl-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--sl-primary);
  margin-bottom: 1.25rem;
  transition: background var(--sl-transition), box-shadow var(--sl-transition);
}

.feature-card:hover .feature-icon {
  background: rgba(56, 189, 248, 0.18);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.25);
}

.feature-card h4 {
  font-family: var(--sl-font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--sl-text);
  margin-bottom: 0.75rem;
  letter-spacing: 0.03em;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--sl-text-muted);
  line-height: 1.7;
  margin: 0;
}

/* ── How it works Steps ──────────────────────────────────── */
.step-card {
  text-align: center;
  padding: 2rem 1.5rem;
  position: relative;
}

.step-card .step-number {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--sl-primary), var(--sl-secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--sl-font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 1.25rem;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.3);
}

.step-card h4 {
  font-family: var(--sl-font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--sl-text);
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: 0.85rem;
  color: var(--sl-text-muted);
  line-height: 1.7;
}

.step-connector {
  position: absolute;
  top: 50px;
  right: 0;
  width: 50%;
  height: 1px;
  background: linear-gradient(90deg, var(--sl-primary), transparent);
  opacity: 0.3;
}

/* ── Landing Stats ───────────────────────────────────────── */
.landing-stat {
  text-align: center;
  padding: 2rem;
}

.landing-stat .stat-num {
  font-family: var(--sl-font-heading);
  font-size: 2.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--sl-primary), var(--sl-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.landing-stat .stat-desc {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sl-text-muted);
  margin-top: 0.5rem;
}

/* ── Class Badge ─────────────────────────────────────────── */
.class-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1rem;
  background: var(--sl-surface-3);
  border: 1px solid var(--sl-border-solid);
  border-radius: var(--sl-radius);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--sl-text);
  transition: border-color var(--sl-transition), background var(--sl-transition);
}

.class-badge:hover {
  border-color: rgba(56, 189, 248, 0.35);
  background: var(--sl-surface-2);
}

.class-badge i { font-size: 1rem; }

/* ╔══════════════════════════════════════════════════════════╗
   ║  FORMS / AUTH                                            ║
   ╚══════════════════════════════════════════════════════════╝ */
.sl-auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  position: relative;
  z-index: 1;
}

.sl-auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--sl-surface);
  border: 1px solid var(--sl-border-solid);
  border-radius: var(--sl-radius-xl);
  padding: 2.5rem 2rem;
}

.sl-auth-card .auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.sl-auth-card .auth-logo .logo-mark {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--sl-primary), var(--sl-accent));
  border-radius: var(--sl-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  margin: 0 auto 0.75rem;
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.3);
}

.sl-auth-card h1 {
  font-family: var(--sl-font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--sl-text);
  letter-spacing: 0.04em;
}

.sl-auth-card .auth-subtitle {
  font-size: 0.85rem;
  color: var(--sl-text-muted);
}

/* Form controls */
.sl-form-group { margin-bottom: 1.25rem; }

.sl-form-group label,
.sl-form-group > label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  /* Raised from --sl-text-muted to full --sl-text for legibility on dark cards */
  color: var(--sl-text) !important;
  margin-bottom: 0.4rem;
  display: block;
}

/* Override Bootstrap dark-theme .form-control completely */
.sl-form-control,
.sl-form-control:not(:disabled) {
  width: 100%;
  background: var(--sl-surface-3) !important;
  border: 1px solid var(--sl-border-solid) !important;
  border-radius: var(--sl-radius) !important;
  color: var(--sl-text) !important;
  font-family: var(--sl-font-body) !important;
  font-size: 0.9rem;
  padding: 0.65rem 0.9rem;
  transition: border-color var(--sl-transition), box-shadow var(--sl-transition);
  outline: none;
  -webkit-text-fill-color: var(--sl-text);  /* Safari autofill colour fix */
  box-shadow: none;
}

.sl-form-control::placeholder { color: var(--sl-text-dim) !important; opacity: 1; }

.sl-form-control:focus,
.sl-form-control:focus-visible {
  border-color: var(--sl-primary) !important;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12) !important;
  background: var(--sl-surface-2) !important;
  color: var(--sl-text) !important;
  outline: none;
}

/* Autofill — browsers tint autofilled inputs with system colours */
.sl-form-control:-webkit-autofill,
.sl-form-control:-webkit-autofill:hover,
.sl-form-control:-webkit-autofill:focus {
  -webkit-box-shadow: 0 0 0 1000px var(--sl-surface-3) inset !important;
  -webkit-text-fill-color: var(--sl-text) !important;
  caret-color: var(--sl-text);
}

.sl-form-control.is-invalid { border-color: var(--sl-danger) !important; }
.sl-form-control.is-invalid:focus { box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.12) !important; }

.sl-invalid-feedback {
  font-size: 0.78rem;
  color: var(--sl-danger);
  margin-top: 0.3rem;
}

/* Textarea variant */
textarea.sl-form-control {
  resize: vertical;
  min-height: 80px;
  line-height: 1.6;
}

/* Select variant */
select.sl-form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 16 16'%3E%3Cpath fill='%238b98a9' d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: right 0.85rem center !important;
  padding-right: 2.5rem;
}

/* File input — Bootstrap dark makes this widget near-invisible */
input[type="file"].sl-form-control {
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  color: var(--sl-text-muted) !important;
}

input[type="file"].sl-form-control::-webkit-file-upload-button,
input[type="file"].sl-form-control::file-selector-button {
  background: var(--sl-surface-3);
  border: 1px solid var(--sl-border-solid);
  border-radius: calc(var(--sl-radius) - 2px);
  color: var(--sl-text);
  font-family: var(--sl-font-body);
  font-size: 0.8rem;
  padding: 0.3rem 0.75rem;
  margin-right: 0.75rem;
  cursor: pointer;
  transition: background var(--sl-transition), border-color var(--sl-transition);
}

input[type="file"].sl-form-control::-webkit-file-upload-button:hover,
input[type="file"].sl-form-control::file-selector-button:hover {
  background: var(--sl-surface-2);
  border-color: var(--sl-primary);
  color: var(--sl-primary);
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  ALERTS / MESSAGES                                       ║
   ╚══════════════════════════════════════════════════════════╝ */
.sl-alert {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: var(--sl-radius);
  font-size: 0.875rem;
  border: 1px solid transparent;
  animation: fadeInDown 0.4s ease both;
}

.sl-alert-success {
  background: rgba(74, 222, 128, 0.08);
  border-color: rgba(74, 222, 128, 0.25);
  color: var(--sl-success);
}

.sl-alert-danger, .sl-alert-error {
  background: rgba(248, 113, 113, 0.08);
  border-color: rgba(248, 113, 113, 0.25);
  color: var(--sl-danger);
}

.sl-alert-info {
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.25);
  color: var(--sl-primary);
}

.sl-alert-warning {
  background: rgba(251, 191, 36, 0.08);
  border-color: rgba(251, 191, 36, 0.25);
  color: var(--sl-warning);
}

.sl-alert .btn-close {
  filter: invert(1);
  opacity: 0.5;
  margin-left: auto;
  flex-shrink: 0;
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  PREDICTION PAGE                                         ║
   ╚══════════════════════════════════════════════════════════╝ */
.upload-zone {
  border: 2px dashed var(--sl-border-solid);
  border-radius: var(--sl-radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--sl-transition), background var(--sl-transition);
  background: rgba(13,17,23,0.5);
  position: relative;
  overflow: hidden;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--sl-primary);
  background: rgba(56, 189, 248, 0.04);
}

.upload-zone .upload-icon {
  font-size: 3rem;
  color: var(--sl-primary);
  opacity: 0.6;
  margin-bottom: 1rem;
}

.upload-zone .upload-title {
  font-family: var(--sl-font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--sl-text);
  margin-bottom: 0.5rem;
}

.upload-zone .upload-hint {
  font-size: 0.8rem;
  color: var(--sl-text-muted);
}

/* Confidence bar */
.confidence-bar-wrap {
  background: var(--sl-surface-3);
  border-radius: 50px;
  height: 8px;
  overflow: hidden;
  margin-top: 0.35rem;
}

.confidence-bar {
  height: 100%;
  border-radius: 50px;
  background: linear-gradient(90deg, var(--sl-primary), var(--sl-accent));
  transition: width 1s ease;
}

/* Result card */
.result-card {
  background: var(--sl-surface-2);
  border: 1px solid var(--sl-border-solid);
  border-radius: var(--sl-radius-lg);
  overflow: hidden;
  /* Explicit text colour so Bootstrap dark never overrides inner content */
  color: var(--sl-text);
}

.result-card .result-header {
  background: var(--sl-surface-2);
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--sl-border-solid);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-card .result-header h5,
.result-card .result-header h5 * {
  font-family: var(--sl-font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--sl-text) !important;
  margin: 0;
}

.result-card .result-body {
  padding: 1.5rem;
  color: var(--sl-text);
}

/* All text inside result cards is explicitly coloured */
.result-card p,
.result-card div,
.result-card span:not(.confidence-pill):not(.section-eyebrow) {
  color: inherit;
}

/* Labels inside result-card form groups */
.result-card .sl-form-group label,
.result-card .sl-form-group > label {
  color: var(--sl-text) !important;
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  HISTORY TABLE                                           ║
   ╚══════════════════════════════════════════════════════════╝ */
.sl-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.sl-table th {
  font-family: var(--sl-font-heading);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sl-text-muted);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--sl-border-solid);
  white-space: nowrap;
}

.sl-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(30, 45, 61, 0.5);
  font-size: 0.875rem;
  color: var(--sl-text);
  vertical-align: middle;
}

.sl-table tr:last-child td { border-bottom: none; }

.sl-table tbody tr:hover td { background: rgba(56, 189, 248, 0.03); }

/* ── Confidence pill ─────────────────────────────────────── */
.confidence-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--sl-font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.65rem;
  border-radius: 50px;
}

.confidence-pill.high   { background: rgba(74, 222, 128, 0.12); color: var(--sl-success); }
.confidence-pill.medium { background: rgba(251, 191, 36, 0.12); color: var(--sl-warning); }
.confidence-pill.low    { background: rgba(248, 113, 113, 0.12); color: var(--sl-danger); }

/* ╔══════════════════════════════════════════════════════════╗
   ║  FOOTER                                                  ║
   ╚══════════════════════════════════════════════════════════╝ */
.sl-footer {
  background: var(--sl-surface);
  border-top: 1px solid var(--sl-border-solid);
  padding: 3rem 0 1.5rem;
  position: relative;
  z-index: 1;
}

.sl-footer .footer-brand {
  font-family: var(--sl-font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--sl-primary);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.sl-footer .footer-desc {
  font-size: 0.85rem;
  color: var(--sl-text-muted);
  line-height: 1.7;
  max-width: 300px;
}

.sl-footer .footer-heading {
  font-family: var(--sl-font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sl-text);
  margin-bottom: 1rem;
}

.sl-footer .footer-link {
  display: block;
  font-size: 0.85rem;
  color: var(--sl-text-muted);
  text-decoration: none;
  padding: 0.2rem 0;
  transition: color var(--sl-transition);
}

.sl-footer .footer-link:hover { color: var(--sl-primary); }

.sl-footer .footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--sl-border-solid);
  font-size: 0.8rem;
  color: var(--sl-text-dim);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ╔══════════════════════════════════════════════════════════╗
   ║  UTILITIES                                               ║
   ╚══════════════════════════════════════════════════════════╝ */
.divider-glow {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--sl-primary), transparent);
  opacity: 0.25;
  margin: 3rem 0;
}

.glow-text {
  text-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--sl-success);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.6);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%   { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.6); }
  70%  { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

/* ── Entry animations ────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-up { animation: fadeInUp 0.7s ease both; }

/* ── Spinner ─────────────────────────────────────────────── */
.sl-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(56, 189, 248, 0.3);
  border-top-color: var(--sl-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Loading overlay ─────────────────────────────────────── */
.sl-loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(6px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  gap: 1rem;
}

.sl-loading-overlay .loading-text {
  font-family: var(--sl-font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--sl-primary);
  text-transform: uppercase;
}

.sl-loading-spinner {
  width: 52px;
  height: 52px;
  border: 3px solid rgba(56, 189, 248, 0.2);
  border-top-color: var(--sl-primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 991.98px) {
  .sl-sidebar { display: none; }
  .sl-app-layout { flex-direction: column; }
  .sl-main-content { padding: 1.25rem; }

  .hero-orb { display: none; }
  .sl-hero { min-height: auto; padding: 4rem 0; }

  .sl-hero .hero-title { font-size: 2.2rem; }
}

@media (max-width: 575.98px) {
  .sl-auth-card { padding: 1.75rem 1.25rem; }
  .stat-card .stat-value { font-size: 1.6rem; }
}