/* ====================================================================
   Personal Future Simulator MVP - Design System & Modern Aesthetics
   Theme: High-Performance Fintech Glassmorphism / Cyber Dark
   Authored by: Coder AI under Design Guidance
   ==================================================================== */

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

:root {
  /* Color Palette */
  --bg-primary: #0a0d14;
  --bg-secondary: #101522;
  --bg-tertiary: #171f33;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 35, 54, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);

  /* Accents & Gradients */
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-purple: #8b5cf6;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;

  --gradient-brand: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-glow: linear-gradient(135deg, rgba(6, 182, 212, 0.25) 0%, rgba(139, 92, 246, 0.25) 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-pivot: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  --gradient-baseline: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);

  /* Borders & Shadows */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(6, 182, 212, 0.5);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 35px rgba(99, 102, 241, 0.25);

  /* Typography */
  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverted: #0a0d14;

  /* Spacing & Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.18s ease;
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: 
    radial-gradient(circle at 15% 20%, rgba(6, 182, 212, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(139, 92, 246, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    var(--bg-primary);
  background-attachment: fixed;
}

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(10, 13, 20, 0.82);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.85rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-brand);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
  fill: #fff;
}

.brand-text {
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: rgba(99, 102, 241, 0.18);
  color: var(--accent-indigo);
  border: 1px solid rgba(99, 102, 241, 0.35);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.user-avatar {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gradient-brand);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-main);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(6, 182, 212, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  color: #fb7185;
  border-color: rgba(244, 63, 94, 0.3);
}

.btn-danger:hover {
  background: rgba(244, 63, 94, 0.25);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 0.85rem 1.85rem;
  font-size: 1.05rem;
}

/* Layout Container */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
  flex: 1;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4.5rem 1.5rem 3rem;
  max-width: 860px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.28);
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2.25rem;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

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

/* Cards & Glassmorphism */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.85rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-smooth);
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.14);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.35rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-badge {
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  text-transform: uppercase;
}

.badge-baseline {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge-pivot {
  background: rgba(139, 92, 246, 0.15);
  color: #a78bfa;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

@media (max-width: 992px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.5rem;
  }
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

.form-label .helper {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-left: 0.35rem;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 0.95rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  pointer-events: none;
}

.input-suffix {
  position: absolute;
  right: 0.95rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  pointer-events: none;
}

.form-control {
  width: 100%;
  background: rgba(10, 13, 20, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.7rem 1rem;
  font-family: var(--font-main);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-control.has-prefix {
  padding-left: 2rem;
}

.form-control.has-suffix {
  padding-right: 2.5rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
  background: rgba(16, 21, 34, 0.85);
}

.form-range {
  width: 100%;
  accent-color: var(--accent-indigo);
  cursor: pointer;
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

/* Preset Buttons */
.preset-bar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.preset-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preset-btn:hover, .preset-btn.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-indigo);
  color: #fff;
}

/* KPI / Metric Cards */
.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border-subtle);
}

.kpi-card.kpi-baseline::before {
  background: var(--accent-blue);
}

.kpi-card.kpi-pivot::before {
  background: var(--accent-purple);
}

.kpi-card.kpi-delta::before {
  background: var(--accent-emerald);
}

.kpi-card.kpi-delta.negative::before {
  background: var(--accent-rose);
}

.kpi-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
}

.kpi-value {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-family: var(--font-mono);
}

.kpi-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Simulation Chart Canvas */
.chart-container {
  position: relative;
  width: 100%;
  height: 420px;
  margin-top: 1rem;
}

/* Comparison Table */
.data-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th {
  background: rgba(16, 21, 34, 0.9);
  padding: 0.85rem 1rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Alerts and Messages */
.alert {
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-danger {
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(244, 63, 94, 0.35);
  color: #fda4af;
}

.alert-success {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #6ee7b7;
}

.alert-info {
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.35);
  color: #67e8f9;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* Auth Cards */
.auth-wrapper {
  max-width: 440px;
  margin: 3.5rem auto;
  width: 100%;
}

.auth-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.auth-title {
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 600;
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background: rgba(10, 13, 20, 0.9);
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}