/* =============================================================================
   index.css — Roth IRA Calculator Design System
   Theme: Dark mode, glassmorphism, teal-emerald accent palette
   ============================================================================= */

/* ---------- Google Font ---------- */
/* Font loaded via <link> tags in index.html for security & performance */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Background */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.65);
  --bg-card-hover: rgba(17, 24, 39, 0.8);
  --bg-input: rgba(255, 255, 255, 0.05);
  --bg-input-focus: rgba(255, 255, 255, 0.08);

  /* Glass effect */
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.14);
  --glass-blur: 20px;

  /* Accent — Teal / Emerald */
  --accent-primary: #14b8a6;
  --accent-primary-dim: rgba(20, 184, 166, 0.15);
  --accent-secondary: #10b981;
  --accent-gradient: linear-gradient(135deg, #14b8a6, #10b981);
  --accent-glow: 0 0 30px rgba(20, 184, 166, 0.15);

  /* Scenario B accent — Amber */
  --accent-b: #f59e0b;
  --accent-b-dim: rgba(245, 158, 11, 0.15);
  --accent-b-gradient: linear-gradient(135deg, #f59e0b, #ef4444);
  --accent-b-glow: 0 0 30px rgba(245, 158, 11, 0.15);

  /* Scenario C accent — Purple / Violet */
  --accent-c: #a78bfa;
  --accent-c-dim: rgba(167, 139, 250, 0.15);
  --accent-c-gradient: linear-gradient(135deg, #a78bfa, #7c3aed);
  --accent-c-glow: 0 0 30px rgba(167, 139, 250, 0.15);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #5eead4;
  --text-accent-b: #fbbf24;
  --text-accent-c: #c4b5fd;

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-divider: rgba(255, 255, 255, 0.08);

  /* Sizing */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 4px rgba(0, 0, 0, 0.2);
  --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---------- DotField Interactive Background ---------- */
.dot-field-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* ---------- App Container ---------- */
.app {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ---------- Header ---------- */
.header {
  text-align: center;
  margin-bottom: 3rem;
  padding-top: 1rem;
}

.header__logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 1rem;
  filter: drop-shadow(0 0 20px rgba(20, 184, 166, 0.25));
  transition: transform var(--transition-normal), filter var(--transition-normal);
}

.header__logo:hover {
  transform: scale(1.08);
  filter: drop-shadow(0 0 30px rgba(20, 184, 166, 0.4));
}

.header__title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.header__tagline {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.header__tagline em {
  color: var(--text-accent);
  font-style: normal;
  font-weight: 500;
}

/* ---------- Scenarios Container ---------- */
.scenarios {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.scenarios--dual {
  grid-template-columns: 1fr 1fr;
}

.scenarios--triple {
  grid-template-columns: 1fr 1fr 1fr;
}

/* ---------- Scenario Panel (Glass Card) ---------- */
.scenario {
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
  animation: fadeSlideUp 0.5s ease-out both;
}

.scenario:hover {
  border-color: var(--glass-border-hover);
}

.scenario--a {
  --panel-accent: var(--accent-primary);
  --panel-accent-dim: var(--accent-primary-dim);
  --panel-text-accent: var(--text-accent);
}

.scenario--b {
  --panel-accent: var(--accent-b);
  --panel-accent-dim: var(--accent-b-dim);
  --panel-text-accent: var(--text-accent-b);
  animation-delay: 0.1s;
}

.scenario--c {
  --panel-accent: var(--accent-c);
  --panel-accent-dim: var(--accent-c-dim);
  --panel-text-accent: var(--text-accent-c);
  animation-delay: 0.2s;
}

.scenario__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.scenario__label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--panel-text-accent);
}

.scenario__label-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--panel-accent);
  box-shadow: 0 0 8px var(--panel-accent);
}

.scenario__remove-btn {
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.scenario__remove-btn:hover {
  border-color: #ef4444;
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

/* ---------- Form Layout ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-input {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
  width: 100%;
}

.form-input:focus {
  background: var(--bg-input-focus);
  border-color: var(--panel-accent, var(--accent-primary));
  box-shadow: 0 0 0 3px var(--panel-accent-dim, var(--accent-primary-dim));
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* Number input spinners — subtle */
.form-input[type="number"]::-webkit-inner-spin-button,
.form-input[type="number"]::-webkit-outer-spin-button {
  opacity: 0.3;
}

/* ---------- Strategy Toggle ---------- */
.strategy-toggle {
  display: flex;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.strategy-toggle:hover {
  border-color: var(--panel-accent, var(--accent-primary));
  box-shadow: 0 0 0 3px var(--panel-accent-dim, var(--accent-primary-dim)),
              0 0 12px var(--panel-accent-dim, var(--accent-primary-dim));
}

.strategy-toggle__option {
  flex: 1;
  padding: 0.55rem 0.5rem;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.strategy-toggle__option:hover {
  color: var(--panel-text-accent, var(--text-accent));
}

.strategy-toggle__option--active {
  background: var(--panel-accent, var(--accent-primary));
  color: var(--bg-primary);
  font-weight: 600;
}

/* ---------- Range Slider ---------- */
.range-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.range-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  background: var(--border-subtle);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--panel-accent, var(--accent-primary));
  box-shadow: 0 0 8px var(--panel-accent, var(--accent-primary));
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.range-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--panel-accent, var(--accent-primary));
  box-shadow: 0 0 8px var(--panel-accent, var(--accent-primary));
  border: none;
  cursor: pointer;
}

.range-value {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--panel-text-accent, var(--text-accent));
  min-width: 3rem;
  text-align: right;
}

/* ---------- Advanced Toggle ---------- */
.advanced-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding: 0.4rem 0;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.advanced-toggle:hover {
  color: var(--text-secondary);
}

.advanced-toggle__icon {
  transition: transform var(--transition-normal);
  font-size: 0.65rem;
}

.advanced-toggle__icon--open {
  transform: rotate(90deg);
}

.advanced-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height var(--transition-slow), opacity var(--transition-normal), margin var(--transition-normal);
}

.advanced-section--open {
  max-height: 300px;
  opacity: 1;
  margin-top: 0.75rem;
}

/* ---------- Divider ---------- */
.divider {
  height: 1px;
  background: var(--border-divider);
  margin: 1.5rem 0;
}

/* ---------- Results Section ---------- */
.results {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.results--visible {
  opacity: 1;
  transform: translateY(0);
}

.results__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.result-card {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  transition: border-color var(--transition-fast);
}

.result-card:hover {
  border-color: var(--glass-border-hover);
}

.result-card--hero {
  grid-column: 1 / -1;
  background: var(--panel-accent-dim, var(--accent-primary-dim));
  border-color: rgba(20, 184, 166, 0.15);
}

.result-card__label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.result-card__value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.result-card--hero .result-card__value {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.scenario--b .result-card--hero .result-card__value {
  background: var(--accent-b-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.scenario--c .result-card--hero .result-card__value {
  background: var(--accent-c-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Year-by-Year Table ---------- */
.table-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  width: 100%;
  background: var(--panel-accent-dim, var(--accent-primary-dim));
  border: 1px solid rgba(20, 184, 166, 0.2);
  border-radius: var(--radius-md);
  color: var(--panel-text-accent, var(--text-accent));
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  padding: 0.75rem 1.25rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.table-toggle::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(20, 184, 166, 0.06) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.table-toggle:hover {
  border-color: var(--panel-accent, var(--accent-primary));
  box-shadow: 0 0 20px rgba(20, 184, 166, 0.12), inset 0 0 20px rgba(20, 184, 166, 0.04);
  transform: translateY(-1px);
}

.table-toggle:hover::before {
  opacity: 1;
}

.table-toggle:active {
  transform: translateY(0);
}

/* Scenario B overrides for amber accent */
.scenario--b .table-toggle {
  background: var(--accent-b-dim);
  border-color: rgba(245, 158, 11, 0.2);
}

.scenario--b .table-toggle:hover {
  border-color: var(--accent-b);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.12), inset 0 0 20px rgba(245, 158, 11, 0.04);
}

.scenario--b .table-toggle::before {
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(245, 158, 11, 0.06) 50%,
    transparent 100%
  );
}

/* Scenario C overrides for purple accent */
.scenario--c .table-toggle {
  background: var(--accent-c-dim);
  border-color: rgba(167, 139, 250, 0.2);
}

.scenario--c .table-toggle:hover {
  border-color: var(--accent-c);
  box-shadow: 0 0 20px rgba(167, 139, 250, 0.12), inset 0 0 20px rgba(167, 139, 250, 0.04);
}

.scenario--c .table-toggle::before {
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(167, 139, 250, 0.06) 50%,
    transparent 100%
  );
}

/* Chevron icon animation */
.table-toggle .advanced-toggle__icon {
  font-size: 0.7rem;
  transition: transform var(--transition-normal);
}

.table-toggle--open .advanced-toggle__icon {
  transform: rotate(90deg);
}

.table-container {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height var(--transition-slow), opacity var(--transition-normal);
}

.table-container--open {
  max-height: 600px;
  opacity: 1;
  overflow-y: auto;
  margin-top: 0.75rem;
}

/* Custom scrollbar for table */
.table-container::-webkit-scrollbar {
  width: 5px;
}

.table-container::-webkit-scrollbar-track {
  background: transparent;
}

.table-container::-webkit-scrollbar-thumb {
  background: var(--border-divider);
  border-radius: 3px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

.data-table thead {
  position: sticky;
  top: 0;
  z-index: 2;
}

.data-table th {
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.68rem;
  padding: 0.6rem 0.5rem;
  text-align: right;
  border-bottom: 1px solid var(--border-divider);
}

.data-table th:first-child {
  text-align: left;
}

.data-table td {
  padding: 0.5rem 0.5rem;
  text-align: right;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-fast);
}

.data-table td:first-child {
  text-align: left;
  color: var(--text-primary);
  font-weight: 500;
}

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

/* Highlight the catch-up transition row */
.data-table tr.catchup-row td {
  color: var(--text-accent);
}

/* ---------- Add Scenario Button ---------- */
.add-scenario-wrapper {
  display: flex;
  justify-content: center;
  margin: 1rem 0 2rem;
}

.add-scenario-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px dashed var(--border-divider);
  border-radius: var(--radius-lg);
  padding: 0.8rem 1.5rem;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.add-scenario-btn:hover {
  border-color: var(--accent-b);
  color: var(--text-accent-b);
  box-shadow: var(--accent-b-glow);
}

.add-scenario-btn__icon {
  font-size: 1.1rem;
  font-weight: 300;
}

/* ---------- Comparison Section ---------- */
.comparison {
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  margin-top: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.comparison--visible {
  opacity: 1;
  transform: translateY(0);
}

.comparison__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.comparison__title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.comparison__delta {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-sm);
  background: var(--accent-primary-dim);
  color: var(--text-accent);
}

.comparison__chart-wrapper {
  position: relative;
  height: 320px;
}

/* ---------- Border Glow Effect ---------- */
.border-glow {
  --edge-proximity: 0;
  --cursor-angle: 0deg;
  --edge-sensitivity: 30;
  --glow-padding: 30px;
  --glow-c1: #14b8a6;
  --glow-c2: #5eead4;
  --glow-c3: #10b981;
  position: relative;
  overflow: visible !important;
  isolation: isolate;
}

/* Directional gradient border — only the border ring is visible,
   the inside is masked out so glassmorphism/existing bg shows through */
.border-glow::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1.5px;
  background: conic-gradient(
    from calc(var(--cursor-angle) - 90deg),
    transparent 0%,
    var(--glow-c1) 8%,
    var(--glow-c2) 16%,
    var(--glow-c3) 24%,
    transparent 32%,
    transparent 68%,
    var(--glow-c3) 76%,
    var(--glow-c2) 84%,
    var(--glow-c1) 92%,
    transparent 100%
  );
  /* Mask: show only the border ring, exclude the content area */
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask-composite: exclude;
  /* Opacity driven by edge proximity */
  opacity: calc(
    clamp(0, (var(--edge-proximity) - var(--edge-sensitivity)) / (100 - var(--edge-sensitivity)), 1)
  );
  pointer-events: none;
  z-index: 4;
  transition: opacity 0.25s ease-out;
}

/* Fade out when not hovering */
.border-glow:not(:hover)::before,
.border-glow:not(:hover) > .edge-light {
  opacity: 0 !important;
  transition: opacity 0.6s ease-in-out;
}

/* Outer glow layer — directional cone mask so glow only appears
   on the edge nearest the cursor */
.border-glow > .edge-light {
  position: absolute;
  inset: calc(var(--glow-padding) * -1);
  border-radius: inherit;
  pointer-events: none;
  z-index: -1;
  opacity: calc(
    clamp(0, (var(--edge-proximity) - var(--edge-sensitivity)) / (100 - var(--edge-sensitivity)), 1)
  );
  transition: opacity 0.25s ease-out;
  -webkit-mask-image: conic-gradient(
    from var(--cursor-angle) at center,
    black 2.5%, transparent 12%, transparent 88%, black 97.5%
  );
  mask-image: conic-gradient(
    from var(--cursor-angle) at center,
    black 2.5%, transparent 12%, transparent 88%, black 97.5%
  );
  mix-blend-mode: plus-lighter;
}

/* Inner box-shadow glow */
.border-glow > .edge-light::before {
  content: "";
  position: absolute;
  inset: var(--glow-padding);
  border-radius: inherit;
  box-shadow:
    inset 0 0 0 1px var(--glow-color, hsl(174deg 70% 60% / 100%)),
    inset 0 0 2px 0 var(--glow-color-60, hsl(174deg 70% 60% / 60%)),
    inset 0 0 4px 0 var(--glow-color-50, hsl(174deg 70% 60% / 50%)),
    inset 0 0 8px 0 var(--glow-color-40, hsl(174deg 70% 60% / 40%)),
    inset 0 0 16px 0 var(--glow-color-30, hsl(174deg 70% 60% / 30%)),
    inset 0 0 28px 2px var(--glow-color-20, hsl(174deg 70% 60% / 20%)),
    0 0 2px 0 var(--glow-color-60, hsl(174deg 70% 60% / 60%)),
    0 0 4px 0 var(--glow-color-50, hsl(174deg 70% 60% / 50%)),
    0 0 8px 0 var(--glow-color-40, hsl(174deg 70% 60% / 40%)),
    0 0 16px 0 var(--glow-color-30, hsl(174deg 70% 60% / 30%)),
    0 0 28px 2px var(--glow-color-20, hsl(174deg 70% 60% / 20%));
}

/* ---------- Hidden Utility ---------- */
.hidden {
  display: none !important;
}

/* ---------- Animations ---------- */
@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes countUp {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

.animate-value {
  animation: countUp 0.3s ease-out;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .scenarios--dual,
  .scenarios--triple {
    grid-template-columns: 1fr;
  }

  .header__title {
    font-size: 2rem;
  }
}

@media (max-width: 640px) {
  .app {
    padding: 1.25rem 1rem 3rem;
  }

  .header__title {
    font-size: 1.6rem;
  }

  .header__tagline {
    font-size: 0.9rem;
  }

  .scenario {
    padding: 1.25rem;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .results__grid {
    grid-template-columns: 1fr;
  }

  .result-card--hero {
    grid-column: 1;
  }

  .result-card--hero .result-card__value {
    font-size: 1.5rem;
  }

  .comparison__chart-wrapper {
    height: 240px;
  }

  .data-table {
    font-size: 0.7rem;
  }
}

/* ---------- Footer ---------- */
.footer {
  margin-top: 4rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer__legal-block h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__legal-block p {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0.75rem;
}

.footer__legal-block p:last-child {
  margin-bottom: 0;
}

.footer__social {
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px dashed var(--border-subtle);
}

.social-link {
  color: var(--text-muted);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

.social-link:hover {
  color: var(--accent-primary);
  background: var(--accent-primary-dim);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.2);
}

/* ---------- Legal Banner ---------- */
.legal-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--border-divider);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
  box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.5);
}

.legal-banner--visible {
  transform: translateY(0);
}

.legal-banner__content {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}

.legal-banner__content strong {
  color: #ef4444;
  font-weight: 600;
}

.legal-banner__btn {
  white-space: nowrap;
  background: var(--accent-primary-dim);
  color: var(--text-accent);
  border: 1px solid rgba(20, 184, 166, 0.3);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.legal-banner__btn:hover {
  background: var(--accent-primary);
  color: var(--bg-primary);
  box-shadow: 0 0 15px rgba(20, 184, 166, 0.4);
}

@media (max-width: 768px) {
  .legal-banner {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    padding: 1.25rem;
  }
  
  .legal-banner__btn {
    width: 100%;
  }
}