/* ============================================================
   DRIVE MUSIC CHANNEL — style.css
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');

/* ============================================================
   Custom Properties
   ============================================================ */
:root {
  /* Colors */
  --color-bg:        #000000;
  --color-bg-alt:    #0a0a0a;
  --color-text:      #ffffff;
  --color-muted:     #8a8a8a;
  --color-gold:      #ffffff;
  --color-gold-dim:  rgba(255, 255, 255, 0.18);
  --color-cream:     #EEF1EA;

  /* Typography */
  --font-base:       'Inter', system-ui, sans-serif;
  --fw-regular:      400;
  --fw-medium:       500;
  --fw-bold:         700;

  /* Spacing scale */
  --space-xs:   0.5rem;
  --space-sm:   1rem;
  --space-md:   2rem;
  --space-lg:   4rem;
  --space-xl:   6rem;
  --space-2xl: 10rem;

  /* Layout */
  --max-width:  1200px;
  --header-h:   72px;
  --radius:     4px;
  --radius-lg:  8px;

  /* Transitions */
  --trans-fast: 0.18s ease;
  --trans-base: 0.3s ease;
  --trans-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  font-family: var(--font-base);
  font-weight: var(--fw-regular);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

/* ============================================================
   Container
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* ============================================================
   Fade-In (IntersectionObserver)
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--trans-slow), transform var(--trans-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   Button System
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.875rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: background var(--trans-fast), color var(--trans-fast),
              border-color var(--trans-fast), transform var(--trans-fast),
              box-shadow var(--trans-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

/* Primary: white bg, black text */
.btn--primary {
  background: var(--color-text);
  color: var(--color-bg);
  border: 2px solid var(--color-text);
}

.btn--primary:hover {
  background: var(--color-cream);
  border-color: var(--color-cream);
  box-shadow: 0 6px 24px rgba(255, 255, 255, 0.15);
}

/* Gold: gold outline */
.btn--gold {
  background: transparent;
  color: var(--color-gold);
  border: 2px solid var(--color-gold);
}

.btn--gold:hover {
  background: var(--color-gold);
  color: var(--color-bg);
  box-shadow: 0 6px 24px rgba(201, 168, 76, 0.3);
}

/* Ghost: transparent, white outline */
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn--ghost:hover {
  border-color: var(--color-text);
  box-shadow: 0 6px 24px rgba(255, 255, 255, 0.1);
}

/* ============================================================
   Section Titles
   ============================================================ */
.section-label {
  display: block;
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  line-height: 1.1;
  position: relative;
  display: inline-block;
  padding-bottom: 0.6rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--color-gold);
  border-radius: 2px;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background var(--trans-base), backdrop-filter var(--trans-base),
              box-shadow var(--trans-base);
}

.site-header.scrolled {
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.header-logo img {
  height: 40px;
  width: auto;
  filter: invert(1);
  display: block;
}

.header-logo:hover img {
  opacity: 0.85;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  color: var(--color-muted);
  letter-spacing: 0.06em;
  transition: color var(--trans-fast);
}

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

.header-cta {
  padding: 0.5rem 1.25rem;
  font-size: 0.8125rem;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  z-index: 200;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--trans-base), opacity var(--trans-base);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile overlay nav */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 150;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans-base);
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav a {
  font-size: 2rem;
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  color: var(--color-text);
  transition: color var(--trans-fast);
}

.mobile-nav a:hover {
  color: var(--color-gold);
}

.mobile-nav .btn {
  margin-top: var(--space-sm);
  font-size: 1rem;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--header-h) var(--space-md) var(--space-lg);
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 30% 60%, rgba(201, 168, 76, 0.06), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero-overline {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
}

.hero-title {
  font-size: clamp(4rem, 15vw, 10rem);
  font-weight: var(--fw-bold);
  letter-spacing: -0.04em;
  line-height: 0.9;
  background: linear-gradient(135deg, #ffffff 0%, #c9a84c 60%, #ffffff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-muted);
  font-weight: var(--fw-regular);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-lg);
  max-width: 500px;
  margin-inline: auto;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-muted);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--color-gold);
  border-bottom: 2px solid var(--color-gold);
  transform: rotate(45deg);
  animation: bounce 1.6s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50%       { transform: rotate(45deg) translateY(6px); }
}

/* ============================================================
   Section Wrapper
   ============================================================ */
.section {
  padding: var(--space-xl) 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section-header {
  margin-bottom: var(--space-lg);
}

/* ============================================================
   Videos Section
   ============================================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

.video-facade {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #111;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
}

.video-facade img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--trans-slow), filter var(--trans-slow);
}

.video-facade:hover img {
  transform: scale(1.04);
  filter: brightness(0.6);
}

.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.play-btn__circle {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--trans-fast), border-color var(--trans-fast),
              transform var(--trans-fast);
  backdrop-filter: blur(4px);
}

.play-btn__circle svg {
  width: 24px;
  height: 24px;
  fill: #fff;
  margin-left: 4px; /* optical center for play triangle */
}

.video-facade:hover .play-btn__circle {
  background: rgba(201, 168, 76, 0.85);
  border-color: var(--color-gold);
  transform: scale(1.1);
}

.video-facade iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  z-index: 2;
}

/* ============================================================
   Merch Section
   ============================================================ */
.merch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.product-card {
  background: var(--color-bg-alt);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--trans-base), transform var(--trans-base),
              box-shadow var(--trans-base);
}

.product-card:hover {
  border-color: var(--color-gold);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(201, 168, 76, 0.12);
}

.product-image {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  position: relative;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--trans-slow);
}

.product-card:hover .product-image img {
  transform: scale(1.03);
}

.product-body {
  padding: 1.25rem;
}

.product-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 0.5rem;
}

.product-name {
  font-size: 1rem;
  font-weight: var(--fw-bold);
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

.product-price {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-gold);
  transition: gap var(--trans-fast), opacity var(--trans-fast);
}

.product-link:hover {
  gap: 0.7rem;
  opacity: 0.85;
}

.merch-cta {
  text-align: center;
}

/* ============================================================
   About Section
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about-text .section-header {
  margin-bottom: var(--space-md);
}

.about-headline {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: var(--fw-bold);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.about-body {
  color: var(--color-muted);
  line-height: 1.75;
  margin-bottom: var(--space-md);
  max-width: 520px;
}

.about-body p + p {
  margin-top: 1rem;
}

.about-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-logo img {
  width: 100%;
  max-width: 400px;
  opacity: 0.5;
  filter: brightness(1.2);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--space-lg) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-brand img {
  height: 32px;
  filter: invert(1);
  margin-bottom: var(--space-sm);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.6;
  max-width: 240px;
}

.footer-col-title {
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-muted);
  transition: color var(--trans-fast);
}

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

.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-muted);
  transition: color var(--trans-fast);
}

.social-link:hover {
  color: var(--color-gold);
}

.social-link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  flex-shrink: 0;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.footer-bottom a {
  color: var(--color-muted);
  transition: color var(--trans-fast);
}

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

/* ============================================================
   Responsive — Tablet (≤900px)
   ============================================================ */
@media (max-width: 900px) {
  :root {
    --space-xl: 4rem;
    --space-2xl: 6rem;
  }

  /* Header */
  .hamburger {
    display: flex;
  }

  .header-nav .nav-links,
  .header-nav .header-cta {
    display: none;
  }

  .mobile-nav {
    display: flex;
  }

  /* Merch grid → 2 columns */
  .merch-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* About → stacked */
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about-logo {
    order: -1;
  }

  .about-logo img {
    max-width: 280px;
  }

  /* Footer → 2 col */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* ============================================================
   Responsive — Mobile (≤600px)
   ============================================================ */
@media (max-width: 600px) {
  :root {
    --space-lg: 3rem;
    --space-xl: 3rem;
  }

  /* Hero CTAs stacked */
  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-ctas .btn {
    width: 100%;
    justify-content: center;
  }

  /* Merch → 1 column */
  .merch-grid {
    grid-template-columns: 1fr;
  }

  /* Video grid → single col */
  .video-grid {
    grid-template-columns: 1fr;
  }

  /* Footer → single col */
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}