/* ============================================================
   F1 Detailing Solutions — Premium dark aesthetic
   ============================================================ */

:root,
[data-theme='light'] {
  /* Surfaces — premium dark by default; light overridden below */
  --color-bg: #0a0a0c;
  --color-surface: #111114;
  --color-surface-2: #16161a;
  --color-surface-offset: #1b1b20;
  --color-divider: #24242a;
  --color-border: #2c2c34;

  /* Text */
  --color-text: #f4f4f5;
  --color-text-muted: #a1a1aa;
  --color-text-faint: #6b6b75;
  --color-text-inverse: #0a0a0c;

  /* Accent — F1 racing red */
  --color-primary: #e10600;
  --color-primary-hover: #ff1a14;
  --color-primary-active: #b00500;
  --color-primary-soft: rgba(225, 6, 0, 0.12);

  /* Neutral accent for secondary surfaces */
  --color-accent-2: #c8a45c; /* muted gold for tier accents */

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 18px rgba(0,0,0,0.45);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.55);
  --shadow-glow: 0 8px 30px rgba(225,6,0,0.25);

  --content-narrow: 680px;
  --content-default: 1080px;
  --content-wide: 1240px;
  --content-full: 100%;

  --font-display: 'Sora', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.25rem, 1.05rem + 0.9vw, 1.625rem);
  --text-xl: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem);
  --text-2xl: clamp(2.1rem, 1.3rem + 3.4vw, 3.6rem);
  --text-3xl: clamp(2.6rem, 1rem + 5vw, 4.8rem);

  /* Spacing */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;
}

/* Light theme */
[data-theme='light'] {
  --color-bg: #f6f6f4;
  --color-surface: #ffffff;
  --color-surface-2: #f1f1ee;
  --color-surface-offset: #ebebe7;
  --color-divider: #e2e2dd;
  --color-border: #d6d6cf;

  --color-text: #18181b;
  --color-text-muted: #52525b;
  --color-text-faint: #9b9ba3;
  --color-text-inverse: #ffffff;

  --color-primary: #d00500;
  --color-primary-hover: #b00400;
  --color-primary-active: #8a0300;
  --color-primary-soft: rgba(208,5,0,0.10);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 18px rgba(0,0,0,0.10);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.14);
  --shadow-glow: 0 8px 30px rgba(208,5,0,0.18);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-display);
  text-wrap: balance;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection { background: var(--color-primary-soft); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

button { cursor: pointer; background: none; border: none; }

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.section { padding-block: clamp(var(--space-12), 7vw, var(--space-24)); }
.section-alt { background: var(--color-surface); border-block: 1px solid var(--color-divider); }

.section-head { max-width: var(--content-default); margin-bottom: var(--space-12); }
.section-head h2 { font-size: var(--text-2xl); margin-block: var(--space-3) var(--space-4); }
.section-lead { color: var(--color-text-muted); font-size: var(--text-base); max-width: 64ch; }

.eyebrow {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.accent { color: var(--color-primary); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--transition-interactive), background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-sm { padding: var(--space-2) var(--space-4); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }
.btn-block { display: flex; width: 100%; }

.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-glow); }
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-outline { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-ghost { background: color-mix(in oklab, var(--color-text) 8%, transparent); color: var(--color-text); border: 1px solid var(--color-border); }
.btn-ghost:hover { border-color: var(--color-text); background: color-mix(in oklab, var(--color-text) 14%, transparent); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 80%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition: background var(--transition-interactive);
}
.nav-bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-6); min-height: 72px;
}
.brand { display: inline-flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--color-text); }
.brand-mark { width: 34px; height: 34px; color: var(--color-primary); }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-text strong { font-family: var(--font-display); font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; }
.brand-text em { font-style: normal; font-size: 0.62rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--color-text-muted); font-weight: 500; }

.primary-nav { display: flex; gap: var(--space-8); }
.primary-nav a {
  font-family: var(--font-display); font-size: var(--text-sm); font-weight: 500;
  color: var(--color-text-muted); text-decoration: none; position: relative; padding-block: var(--space-1);
}
.primary-nav a:hover { color: var(--color-text); }
.primary-nav a::after { content:''; position:absolute; left:0; bottom:-2px; width:0; height:2px; background:var(--color-primary); transition: width var(--transition-interactive); }
.primary-nav a:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: var(--space-4); }
.nav-phone { display: inline-flex; align-items: center; gap: var(--space-2); font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; color: var(--color-text); text-decoration: none; }
.nav-phone:hover { color: var(--color-primary); }

.theme-toggle, .menu-toggle { display: inline-flex; align-items: center; justify-content: center; color: var(--color-text); padding: var(--space-2); border-radius: var(--radius-full); }
.theme-toggle:hover, .menu-toggle:hover { background: color-mix(in oklab, var(--color-text) 10%, transparent); }

.mobile-nav { display: none; flex-direction: column; gap: var(--space-2); padding: var(--space-4) var(--space-6) var(--space-6); border-top: 1px solid var(--color-divider); background: var(--color-bg); }
.mobile-nav a { font-family: var(--font-display); font-weight: 600; color: var(--color-text); text-decoration: none; padding: var(--space-3) 0; border-bottom: 1px solid var(--color-divider); }
.mobile-nav .btn { margin-top: var(--space-3); }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: min(92vh, 820px); display: flex; align-items: center; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('assets/img/hero.jpg');
  background-size: cover; background-position: center;
  transform: scale(1.05);
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(8,8,10,0.92) 0%, rgba(8,8,10,0.72) 38%, rgba(8,8,10,0.30) 70%, rgba(8,8,10,0.55) 100%),
    linear-gradient(0deg, rgba(8,8,10,0.85) 0%, rgba(8,8,10,0) 45%);
}
[data-theme='light'] .hero-overlay {
  background:
    linear-gradient(90deg, rgba(20,20,24,0.85) 0%, rgba(20,20,24,0.6) 40%, rgba(20,20,24,0.20) 72%, rgba(20,20,24,0.50) 100%),
    linear-gradient(0deg, rgba(20,20,24,0.80) 0%, rgba(20,20,24,0) 45%);
}
.hero-content { position: relative; z-index: 2; padding-block: var(--space-24); max-width: 760px; }
.hero .eyebrow { color: #ff5b56; }
.hero-title { font-size: var(--text-3xl); color: #fff; margin-block: var(--space-4); max-width: 16ch; }
.hero-sub { color: rgba(255,255,255,0.86); font-size: var(--text-lg); max-width: 56ch; margin-bottom: var(--space-8); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-12); }
.hero-ctas .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.35); background: rgba(255,255,255,0.06); }
.hero-ctas .btn-ghost:hover { background: rgba(255,255,255,0.14); border-color: #fff; }

.hero-stats { display: flex; flex-wrap: wrap; gap: var(--space-8); border-top: 1px solid rgba(255,255,255,0.18); padding-top: var(--space-6); }
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { font-family: var(--font-display); color: #fff; font-size: var(--text-base); font-weight: 700; }
.hero-stats span { color: rgba(255,255,255,0.7); font-size: var(--text-sm); }

/* ---------- Trust strip ---------- */
.trust { padding-block: var(--space-12); background: var(--color-surface); border-bottom: 1px solid var(--color-divider); }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-8); }
.trust-item { display: flex; gap: var(--space-4); align-items: flex-start; }
.trust-item svg { color: var(--color-primary); flex-shrink: 0; margin-top: 2px; }
.trust-item h3 { font-size: var(--text-base); margin-bottom: var(--space-1); }
.trust-item p { font-size: var(--text-sm); color: var(--color-text-muted); max-width: 32ch; }

/* ---------- Pricing note + cards ---------- */
.pricing-note { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-8); }
.pricing-note span { font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; color: var(--color-text-muted); }
.pricing-note ul { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.pricing-note li { font-size: var(--text-xs); padding: var(--space-1) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-full); color: var(--color-text-muted); }

.cards { display: grid; gap: var(--space-6); }
.packages-grid { grid-template-columns: repeat(4, 1fr); }
.ceramic-grid { grid-template-columns: repeat(3, 1fr); }

.card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--transition-interactive), border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in oklab, var(--color-primary) 50%, var(--color-border)); box-shadow: var(--shadow-md); }

.card-featured { border-color: var(--color-primary); box-shadow: var(--shadow-glow); background: linear-gradient(180deg, var(--color-primary-soft), var(--color-surface-2) 60%); }

.badge { position: absolute; top: -12px; left: var(--space-6); background: var(--color-primary); color: #fff; font-family: var(--font-display); font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.04em; padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); text-transform: uppercase; }

.card-head h3 { font-size: var(--text-lg); }
.best-for { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-1); }

.price-tiers { display: flex; flex-direction: column; gap: var(--space-1); margin-block: var(--space-4); padding: var(--space-4); background: var(--color-surface-offset); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.price-tiers > div { display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-3); padding-block: var(--space-1); }
.price-tiers > div + div { border-top: 1px solid var(--color-divider); }
.price-tiers span { font-size: var(--text-sm); color: var(--color-text-muted); }
.price-tiers strong { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; letter-spacing: -0.02em; white-space: nowrap; }
.card-featured .price-tiers { background: color-mix(in oklab, var(--color-primary) 8%, var(--color-surface-2)); }

.feature-list { display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-6); flex: 1 0 auto; }
.card .btn-block { margin-top: auto; }
.feature-list li { position: relative; padding-left: var(--space-6); font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.5; }
.feature-list li::before { content:''; position:absolute; left: 0; top: 0.55em; width: 7px; height: 7px; border-radius: 50%; background: var(--color-primary); }

.coating-desc { font-size: var(--text-sm); color: var(--color-text); margin-block: var(--space-3) var(--space-4); }
.tier-flag { align-self: flex-start; font-family: var(--font-display); font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-primary); padding: var(--space-1) var(--space-3); border: 1px solid color-mix(in oklab, var(--color-primary) 40%, transparent); border-radius: var(--radius-full); margin-bottom: var(--space-4); }
.tier-flag.elite { color: var(--color-accent-2); border-color: color-mix(in oklab, var(--color-accent-2) 40%, transparent); }

.pricing-foot { margin-top: var(--space-8); font-size: var(--text-sm); color: var(--color-text-muted); max-width: 70ch; }

/* ---------- Add-ons ---------- */
.addons { margin-top: var(--space-16); padding-top: var(--space-10); border-top: 1px solid var(--color-divider); }
.addons-head { margin-bottom: var(--space-6); max-width: 64ch; }
.addons-head h3 { font-size: var(--text-xl); margin-bottom: var(--space-2); }
.addons-head p { color: var(--color-text-muted); font-size: var(--text-sm); }
.addons-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }
.addon { display: flex; flex-direction: column; gap: var(--space-1); padding: var(--space-4); background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.addon span:first-child { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.addon span:last-child { font-size: var(--text-xs); color: var(--color-primary); font-family: var(--font-display); font-weight: 600; }

/* ---------- Benefits ---------- */
.benefits { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3) var(--space-6); margin-bottom: var(--space-12); }
.benefits li { position: relative; padding-left: var(--space-6); font-size: var(--text-sm); color: var(--color-text-muted); }
.benefits li::before { content:'✓'; position:absolute; left:0; color: var(--color-primary); font-weight: 700; }
.benefits strong { color: var(--color-text); }

.ceramic-cta { margin-top: var(--space-12); text-align: center; }
.ceramic-cta p { color: var(--color-text-muted); margin-bottom: var(--space-5); }

/* ---------- Process ---------- */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); counter-reset: step; }
.process li { position: relative; padding-top: var(--space-2); }
.step-num { display: block; font-family: var(--font-display); font-size: var(--text-xl); font-weight: 800; color: var(--color-primary); margin-bottom: var(--space-5); letter-spacing: -0.02em; }
.process h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.process p { font-size: var(--text-sm); color: var(--color-text-muted); }
.process li:not(:last-child)::after { content:''; position:absolute; top: 0.7em; right: calc(-1 * var(--space-3)); width: calc(100% - 2ch); height: 1px; background: var(--color-border); }

/* ---------- Our Work ---------- */
.work-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--space-8); align-items: center; }
.work-feature { position: relative; border-radius: var(--radius-xl); overflow: hidden; border: 1px solid var(--color-border); aspect-ratio: 4/3; }
.work-feature img { width: 100%; height: 100%; object-fit: cover; }
.work-feature figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: var(--space-8) var(--space-6) var(--space-5); color: #fff; background: linear-gradient(0deg, rgba(8,8,10,0.9), transparent); font-size: var(--text-sm); }
.work-cta h3 { font-size: var(--text-xl); margin-bottom: var(--space-3); }
.work-cta p { color: var(--color-text-muted); margin-bottom: var(--space-6); }
.work-links { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* ---------- Contact ---------- */
.contact { background: var(--color-surface); border-top: 1px solid var(--color-divider); }
.contact-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: var(--space-12); align-items: center; }
.contact-lead h2 { font-size: var(--text-2xl); margin-block: var(--space-3) var(--space-4); }
.contact-list { display: flex; flex-direction: column; gap: var(--space-4); margin-block: var(--space-8); }
.contact-list li { display: flex; align-items: center; gap: var(--space-3); font-size: var(--text-base); }
.contact-list svg { color: var(--color-primary); flex-shrink: 0; }
.contact-list a { color: var(--color-text); text-decoration: none; font-weight: 500; }
.contact-list a:hover { color: var(--color-primary); }

.social-row { display: flex; gap: var(--space-3); }
.social-row a { display: inline-flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: var(--radius-full); border: 1px solid var(--color-border); color: var(--color-text); }
.social-row a:hover { color: var(--color-primary); border-color: var(--color-primary); }

.contact-cta-card { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-8); box-shadow: var(--shadow-md); }
.contact-cta-card h3 { font-size: var(--text-xl); margin-bottom: var(--space-2); }
.contact-cta-card > p { color: var(--color-text-muted); margin-bottom: var(--space-5); font-size: var(--text-sm); }
.contact-cta-card .btn + .btn { margin-top: var(--space-3); }
.contact-hours { margin-top: var(--space-5); font-size: var(--text-xs); color: var(--color-text-faint); text-align: center; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-bg); border-top: 1px solid var(--color-divider); padding-top: var(--space-16); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--space-8); padding-bottom: var(--space-12); }
.footer-brand .brand { margin-bottom: var(--space-4); }
.footer-brand p { color: var(--color-text-muted); font-size: var(--text-sm); max-width: 48ch; }
.footer-col h4 { font-family: var(--font-display); font-size: var(--text-sm); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-muted); margin-bottom: var(--space-4); }
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a { color: var(--color-text); text-decoration: none; font-size: var(--text-sm); }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-block: var(--space-6); border-top: 1px solid var(--color-divider); }
.footer-bottom p { font-size: var(--text-xs); color: var(--color-text-faint); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .packages-grid { grid-template-columns: repeat(2, 1fr); }
  .ceramic-grid { grid-template-columns: repeat(3, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .process li:nth-child(2)::after { display: none; }
  .addons-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .primary-nav, .nav-phone { display: none; }
  .menu-toggle { display: inline-flex; }
  .mobile-nav.open { display: flex; }
  .ceramic-grid { grid-template-columns: 1fr; }
  .work-grid, .contact-grid { grid-template-columns: 1fr; }
  .benefits { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-2); }
}

@media (max-width: 560px) {
  .packages-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .process li::after { display: none !important; }
  .addons-grid { grid-template-columns: 1fr; }
  .benefits { grid-template-columns: 1fr; }
  .hero-stats { gap: var(--space-5); }
  .container { padding-inline: var(--space-4); }
  .nav-bar { min-height: 64px; }
  .brand-text em { display: none; }
}

@media (min-width: 821px) {
  .menu-toggle { display: none; }
}