/**
 * EverRun marketing site — styles v2.0
 * Dark-first, OLED-true. Tokens from EverRun Design System v1.1.0
 * EverRun accent = Ember Coral #FF5A3C | Parent = sharmaanoop
 */

/* ===== TOKENS ===== */
:root {
  /* Accent — Ember Coral */
  --er-accent:      #FF5A3C;
  --er-accent-dim:  #E6482C;
  --er-accent-on:   #200A05;
  --er-accent-soft: rgba(255, 90, 60, 0.10);
  --er-accent-border: rgba(255, 90, 60, 0.22);
  --er-gradient-cta: linear-gradient(135deg, #FF5A3C, #E6482C);

  /* Neutrals */
  --n-0:    #000000;
  --n-50:   #0A0B0D;
  --n-100:  #121316;
  --n-150:  #1A1C20;
  --n-200:  #24262B;
  --n-300:  #33363D;
  --n-400:  #4A4E58;
  --n-500:  #6E7380;
  --n-600:  #9AA0AB;
  --n-700:  #C6CAD2;
  --n-900:  #F6F7F9;

  /* Semantic — dark (default) */
  --bg:           var(--n-0);
  --bg-raised:    var(--n-100);
  --bg-overlay:   var(--n-150);
  --text-primary:   var(--n-900);
  --text-secondary: var(--n-600);
  --text-tertiary:  var(--n-500);
  --border-subtle:  var(--n-200);
  --border-strong:  var(--n-300);

  /* Type */
  --font-ui:   -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;

  /* Space (4pt grid) */
  --sp-1: 4px;  --sp-2: 8px;   --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px;  --sp-8: 32px; --sp-10: 40px;
  --sp-12: 48px; --sp-16: 64px; --sp-20: 80px; --sp-24: 96px;

  /* Radius */
  --r-control: 10px;
  --r-card:    16px;
  --r-sheet:   24px;
  --r-full:    999px;

  /* Motion */
  --dur-fast:   150ms;
  --dur-base:   250ms;
  --dur-gentle: 350ms;
  --ease:       cubic-bezier(0.2, 0, 0, 1);
  --ease-emph:  cubic-bezier(0.3, 0, 0, 1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

/* ===== NAVIGATION ===== */
.nav {
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 800;
  font-size: 20px;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-accent { color: var(--er-accent); }

.nav nav {
  display: flex;
  gap: var(--sp-6);
}

.nav nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: color var(--dur-fast) var(--ease);
}

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

.cta-small {
  background: var(--er-gradient-cta);
  color: var(--er-accent-on);
  padding: 9px 20px;
  border-radius: var(--r-full);
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  transition: opacity var(--dur-fast) var(--ease);
}

.cta-small:hover { opacity: 0.86; }

/* ===== HERO ===== */
.hero {
  padding: 108px 0 88px;
  text-align: center;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

/* Subtle radial glow behind hero */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% -5%,
      rgba(255, 90, 60, 0.09) 0%,
      transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  font: 600 11px/14px var(--font-ui);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--er-accent);
  margin: 0 0 var(--sp-5);
}

.hero h1 {
  font-size: clamp(28px, 4.5vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-secondary);
  margin: 0 0 var(--sp-5);
  letter-spacing: -0.02em;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.hero h1 strong { color: var(--text-primary); }

.hero-kicker {
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 var(--sp-5);
  color: var(--text-primary);
}

.hero-kicker .accent { color: var(--er-accent); }

.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  margin: 0 auto var(--sp-10);
  max-width: 500px;
  line-height: 1.65;
}

.hero-ctas { margin-bottom: var(--sp-5); }

.cta-primary {
  display: inline-block;
  background: var(--er-gradient-cta);
  color: var(--er-accent-on);
  padding: 18px 40px;
  border-radius: var(--r-full);
  text-decoration: none;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.cta-primary:hover {
  opacity: 0.88;
  transform: translateY(-2px);
}

.hero-note {
  font-size: 13px;
  color: var(--text-tertiary);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ===== SAVINGS STRIP ===== */
.savings-strip {
  background: var(--bg-raised);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--sp-6) 0;
}

.savings-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-12);
  flex-wrap: wrap;
}

.savings-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-1);
}

.savings-stat .num {
  font: 800 40px/1 var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--er-accent);
  letter-spacing: -0.03em;
}

.savings-stat .lbl {
  font: 600 11px/14px var(--font-ui);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.savings-divider {
  width: 1px;
  height: 44px;
  background: var(--border-subtle);
}

/* ===== COMPARE ===== */
.compare { padding: var(--sp-20) 0; }

.section-header { text-align: center; margin-bottom: var(--sp-10); }

.section-overline {
  font: 600 11px/14px var(--font-ui);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--er-accent);
  margin: 0 0 var(--sp-3);
}

.compare h2, .features h2, .final-cta h2 {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 var(--sp-3);
  letter-spacing: -0.02em;
}

.section-sub {
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.6;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 auto var(--sp-4);
  max-width: 700px;
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-card);
  overflow: hidden;
}

.compare-table th,
.compare-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.compare-table thead tr th { border-bottom: 1px solid var(--border-strong); }
.compare-table tbody tr:last-child td { border-bottom: none; }

.compare-table th {
  font: 600 11px/14px var(--font-ui);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  background: var(--bg-overlay);
}

.compare-table td {
  font-size: 15px;
  color: var(--text-secondary);
}

.compare-table td:last-child {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.compare-table td:first-child {
  font-weight: 600;
  color: var(--text-primary);
}

.total-row td {
  font-weight: 700;
  color: var(--text-primary) !important;
}

.total-row td:last-child {
  font-weight: 800;
  font-size: 17px;
}

.everrun-row td {
  font-weight: 800;
  color: var(--er-accent) !important;
  background: var(--er-accent-soft);
}

.everrun-row td:last-child {
  font-size: 20px;
}

.compare-footnote {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 12px;
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ===== FEATURES ===== */
.features {
  padding: var(--sp-20) 0;
  background: var(--bg-raised);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-10);
}

.feature-card {
  background: var(--bg-overlay);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-card);
  padding: var(--sp-6);
  transition: border-color var(--dur-base) var(--ease),
              transform var(--dur-base) var(--ease);
}

.feature-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: var(--sp-4);
  display: block;
}

.feature-card h3 {
  margin: 0 0 var(--sp-3);
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.feature-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.65;
}

/* ===== FINAL CTA ===== */
.final-cta {
  padding: var(--sp-20) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 70% at 50% 120%,
    rgba(255, 90, 60, 0.07) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta h2 { margin: 0 0 var(--sp-3); }

.final-cta p {
  color: var(--text-secondary);
  font-size: 17px;
  margin: 0 0 var(--sp-8);
}

/* ===== FOOTER ===== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--sp-8) 0;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 13px;
  line-height: 1.8;
}

.site-footer p { margin: 0; }
.site-footer p + p { margin-top: var(--sp-2); }

.site-footer a {
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

.site-footer a:hover { color: var(--text-secondary); }

/* ===== SCROLL ANIMATIONS ===== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--dur-gentle) var(--ease-emph),
    transform var(--dur-gentle) var(--ease-emph);
}

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

.fade-up:nth-child(2) { transition-delay: 60ms; }
.fade-up:nth-child(3) { transition-delay: 120ms; }
.fade-up:nth-child(4) { transition-delay: 180ms; }

/* ===== TOOL PAGE SHARED STYLES ===== */
.tool {
  max-width: 640px;
  margin: 0 auto;
  padding: 56px var(--sp-6) var(--sp-6);
}

.tool h1 {
  font-size: clamp(24px, 3.5vw, 32px);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--sp-2);
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.tool .sub {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--sp-6);
  font-size: 16px;
}

.tabs {
  display: flex;
  gap: var(--sp-1);
  justify-content: center;
  margin-bottom: var(--sp-6);
  background: var(--bg-raised);
  padding: 4px;
  border-radius: var(--r-full);
  border: 1px solid var(--border-subtle);
}

.tabs button {
  flex: 1;
  padding: 9px 16px;
  border-radius: var(--r-full);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  font-family: var(--font-ui);
  transition: all var(--dur-fast) var(--ease);
}

.tabs button.active {
  background: var(--bg-overlay);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.4);
}

.tool-form {
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-card);
  padding: var(--sp-6);
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

label {
  display: block;
  font: 700 12px/14px var(--font-ui);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-2);
}

select, input[type="number"], input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--r-control);
  border: 1px solid var(--border-subtle);
  font-size: 15px;
  font-family: var(--font-ui);
  background: var(--bg-overlay);
  color: var(--text-primary);
  transition: border-color var(--dur-fast) var(--ease);
  -webkit-appearance: none;
}

select:focus, input:focus {
  outline: none;
  border-color: var(--er-accent);
}

/* Override select arrow for dark theme */
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236E7380' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.unit-toggle {
  display: flex;
  gap: var(--sp-1);
  margin-bottom: var(--sp-4);
  background: var(--bg-raised);
  padding: 4px;
  border-radius: var(--r-full);
  border: 1px solid var(--border-subtle);
}

.unit-toggle button {
  flex: 1;
  padding: 9px;
  border-radius: var(--r-full);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
  font-family: var(--font-ui);
  transition: all var(--dur-fast) var(--ease);
}

.unit-toggle button.active {
  background: var(--er-accent);
  color: var(--er-accent-on);
}

button.calc {
  width: 100%;
  background: var(--er-gradient-cta);
  color: var(--er-accent-on);
  border: none;
  padding: 16px;
  border-radius: var(--r-full);
  font-weight: 800;
  font-size: 16px;
  cursor: pointer;
  margin-top: var(--sp-2);
  font-family: var(--font-ui);
  transition: opacity var(--dur-fast) var(--ease);
}

button.calc:hover { opacity: 0.86; }

.results { margin-top: var(--sp-6); }

.results table {
  width: 100%;
  border-collapse: collapse;
}

.results th, .results td {
  padding: 12px 4px;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
  font-size: 15px;
}

.results th {
  font: 600 11px/14px var(--font-ui);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  padding-bottom: var(--sp-3);
}

.results td {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.results td:first-child {
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-weight: 600;
}

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

.results tr.highlight td {
  color: var(--er-accent) !important;
  font-weight: 700;
}

.result-box {
  margin-top: var(--sp-5);
  padding: var(--sp-5);
  background: var(--er-accent-soft);
  border: 1px solid var(--er-accent-border);
  border-radius: var(--r-card);
  text-align: center;
  font: 800 22px/1.3 var(--font-mono);
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.article {
  max-width: 640px;
  margin: 48px auto 0;
  padding: 0 var(--sp-6) 64px;
  color: var(--text-secondary);
}

.article h2 {
  color: var(--text-primary);
  font-size: 20px;
  font-weight: 700;
  margin-top: var(--sp-8);
  margin-bottom: var(--sp-3);
  letter-spacing: -0.01em;
}

.article p {
  line-height: 1.75;
  font-size: 15px;
  margin: 0 0 var(--sp-4);
}

.article .promo {
  background: var(--er-accent-soft);
  border: 1px solid var(--er-accent-border);
  border-radius: var(--r-card);
  padding: var(--sp-5);
  margin-top: var(--sp-6);
  text-align: center;
}

.article .promo strong { color: var(--text-primary); }

.article .promo a {
  color: var(--er-accent);
  font-weight: 700;
  text-decoration: none;
  transition: opacity var(--dur-fast) var(--ease);
}

.article .promo a:hover { opacity: 0.8; }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .nav nav { display: none; }
  .savings-inner { gap: var(--sp-8); }
  .savings-divider { display: none; }
  .hero { padding: 72px 0 60px; }
  .hero h1 { font-size: 26px; }
  .hero-kicker { font-size: 24px; }
}

@media (max-width: 480px) {
  .row { grid-template-columns: 1fr; }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .fade-up { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0ms !important; }
}