/* style.css — Olou Beauty Care Design System & Components */

/* ============================================
   CUSTOM PALETTE: OLOU BEAUTY CARE
   Warm cream surfaces, turmeric gold accent.
   No dark mode for this brand site.
   ============================================ */

:root {
  /* --- Type Scale (fluid) --- */
  --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,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* --- 4px Spacing System --- */
  --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;

  /* --- Surfaces (Warm Cream) --- */
  --color-bg:              #fdf9f4;
  --color-surface:         #faf5ee;
  --color-surface-2:       #f7f1e8;
  --color-surface-offset:  #f3ede3;
  --color-surface-offset-2:#eee7db;
  --color-surface-dynamic: #e8e0d3;
  --color-divider:         #ddd5c8;
  --color-border:          #d4cab9;

  /* --- Text --- */
  --color-text:        #333333;
  --color-text-muted:  #777777;
  --color-text-faint:  #b5a999;
  --color-text-inverse:#fdf9f4;

  /* --- Primary Accent (Turmeric Gold) --- */
  --color-primary:          #d09b3d;
  --color-primary-hover:    #b8862f;
  --color-primary-active:   #855c1a;
  --color-primary-highlight: #f3e8d3;

  /* --- Semantic Colors --- */
  --color-success:        #6a8c45;
  --color-success-highlight: #e8f0dd;
  --color-error:          #a13544;
  --color-error-highlight: #f5e0e3;

  /* --- Font Families --- */
  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-body:    'DM Sans', 'Helvetica Neue', sans-serif;

  /* --- Radius --- */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* --- Shadows (tone-matched to warm cream) --- */
  --shadow-sm: 0 1px 2px oklch(0.3 0.02 70 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.3 0.02 70 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.3 0.02 70 / 0.12);

  /* --- Content widths --- */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;
  --content-full:    100%;
}

/* ============================================
   SKIP TO CONTENT
   ============================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: top var(--transition-interactive);
}
.skip-link:focus {
  top: var(--space-2);
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.08);
  padding: var(--space-3) var(--space-4);
}

.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo {
  text-decoration: none;
  color: var(--color-text);
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-3);
}
.logo-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--color-primary);
  flex-shrink: 0;
}
.logo-text {
  display: flex;
  flex-direction: column;
}
.logo-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.01em;
}
.logo-tagline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.3;
}

/* Desktop Nav */
.nav-desktop {
  display: none;
}
.nav-desktop ul {
  list-style: none;
  display: flex;
  gap: var(--space-6);
}
.nav-desktop a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  padding: var(--space-2) var(--space-1);
  transition: color var(--transition-interactive);
}
.nav-desktop a:hover,
.nav-desktop a:focus-visible {
  color: var(--color-primary);
}

/* Hamburger Button */
.hamburger-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text);
}
.hamburger-btn svg {
  width: 24px;
  height: 24px;
}

@media (min-width: 768px) {
  .nav-desktop {
    display: block;
  }
  .hamburger-btn {
    display: none;
  }
}

/* Mobile Nav Overlay */
.nav-mobile {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100dvh;
  z-index: 200;
  background: oklch(from var(--color-bg) l c h / 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  visibility: hidden;
  transition: opacity 300ms cubic-bezier(0.16, 1, 0.3, 1),
              visibility 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-mobile[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}
.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}
.nav-mobile a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.nav-mobile a:hover,
.nav-mobile a:focus-visible {
  color: var(--color-primary);
}
.nav-mobile .close-btn {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  cursor: pointer;
}
.nav-mobile .close-btn svg {
  width: 24px;
  height: 24px;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      to right,
      oklch(0.15 0.02 70 / 0.78) 0%,
      oklch(0.15 0.02 70 / 0.50) 45%,
      oklch(0.15 0.02 70 / 0.20) 100%
    ),
    linear-gradient(
      to top,
      oklch(0.15 0.02 70 / 0.50) 0%,
      oklch(0.15 0.02 70 / 0.00) 30%
    );
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-12) var(--space-4) var(--space-16);
  width: 100%;
}
@media (min-width: 768px) {
  .hero-content {
    padding: var(--space-20) var(--space-8) var(--space-20);
  }
}
.hero-kicker {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 500;
  margin-bottom: var(--space-4);
}
.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 600;
  color: var(--color-text-inverse);
  max-width: 16ch;
  margin-bottom: var(--space-4);
  line-height: 1.08;
}
.hero-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: oklch(0.88 0.01 70);
  max-width: 48ch;
  line-height: 1.65;
  margin-bottom: var(--space-8);
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  min-height: 44px;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
}
.btn:active {
  transform: translateY(0);
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: 1px solid transparent;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  background: var(--color-primary-active);
}
.btn-outline {
  background: transparent;
  color: var(--color-text-inverse);
  border: 1px solid oklch(from var(--color-text-inverse) l c h / 0.4);
}
.btn-outline:hover {
  background: oklch(from var(--color-text-inverse) l c h / 0.1);
  border-color: oklch(from var(--color-text-inverse) l c h / 0.6);
  transform: translateY(-1px);
}
.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-outline-dark:hover {
  background: var(--color-primary-highlight);
  transform: translateY(-1px);
}

/* ============================================
   SECTION COMMON
   ============================================ */
.section {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) var(--space-4);
}
.section-container {
  max-width: var(--content-wide);
  margin-inline: auto;
}
.section-kicker {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 500;
  margin-bottom: var(--space-3);
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.section-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 55ch;
  margin-bottom: var(--space-10);
}

/* Alternating section backgrounds */
.section-alt {
  background: var(--color-surface);
}

/* ============================================
   PRODUCTS
   ============================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--space-6);
}
@media (min-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.product-card {
  background: var(--color-bg);
  border: 1px solid oklch(from var(--color-text) l c h / 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}
.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.product-card-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.product-card-body {
  padding: var(--space-5);
}
.product-card-category {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
  margin-bottom: var(--space-2);
}
.product-card-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.2;
}
.product-card-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}
.product-card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-interactive),
              gap var(--transition-interactive);
}
.product-card-cta:hover {
  color: var(--color-primary-active);
  gap: var(--space-3);
}
.product-card-cta svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ============================================
   ABOUT
   ============================================ */
.about-grid {
  display: grid;
  gap: var(--space-10);
  align-items: center;
}
@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}
.about-text p {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}
.about-text p:last-of-type {
  margin-bottom: var(--space-6);
}
.about-highlight {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  font-style: italic;
  color: var(--color-primary-active);
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-4);
  margin-top: var(--space-4);
  line-height: 1.5;
}
.about-img {
  border-radius: var(--radius-lg);
  width: 100%;
  object-fit: contain;
}

/* ============================================
   GALLERY
   ============================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(200px, 100%), 1fr));
  gap: var(--space-3);
}
@media (min-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }
}
.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 1/1;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}
.gallery-item:hover img {
  transform: scale(1.06);
}

/* ============================================
   INSTAGRAM REELS
   ============================================ */
.reels-grid {
  display: grid;
  gap: var(--space-6);
  justify-items: center;
}
@media (min-width: 768px) {
  .reels-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.reel-container {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 9/16;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-offset);
}
.reel-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ============================================
   VIDEOS
   ============================================ */
.videos-grid {
  display: grid;
  gap: var(--space-6);
  justify-items: center;
}
@media (min-width: 768px) {
  .videos-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.video-container {
  width: 100%;
  max-width: 360px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-offset);
  aspect-ratio: 9/16;
}
.video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-lg);
}

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: grid;
  gap: var(--space-10);
}
@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}
.contact-info a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.contact-info a:hover {
  color: var(--color-primary-active);
}
.contact-detail {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
}
.contact-detail svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-primary);
}
.contact-message {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
}
.contact-message p {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}
.contact-social {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.contact-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              transform var(--transition-interactive);
}
.contact-social a:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
}
.contact-social svg {
  width: 20px;
  height: 20px;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-surface-offset);
  border-top: 1px solid oklch(from var(--color-text) l c h / 0.08);
  padding: var(--space-8) var(--space-4);
  text-align: center;
}
.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}
.footer-text {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.footer-links {
  display: flex;
  gap: var(--space-4);
}
.footer-links a {
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}
.footer-links a:hover {
  color: var(--color-primary);
}
.footer-links svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-in.is-visible {
  opacity: 1;
}

/* Stagger children */
.stagger-children .fade-in:nth-child(1) { transition-delay: 0ms; }
.stagger-children .fade-in:nth-child(2) { transition-delay: 50ms; }
.stagger-children .fade-in:nth-child(3) { transition-delay: 100ms; }
.stagger-children .fade-in:nth-child(4) { transition-delay: 150ms; }
.stagger-children .fade-in:nth-child(5) { transition-delay: 200ms; }
.stagger-children .fade-in:nth-child(6) { transition-delay: 250ms; }

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transition: none;
  }
}

/* ============================================
   HEADER SCROLL STATE
   ============================================ */
.header-scrolled {
  box-shadow: var(--shadow-sm);
}

/* ============================================
   MOBILE RESPONSIVE OVERRIDES
   ============================================ */
@media (max-width: 767px) {
  .hero {
    min-height: 70vh;
  }
  .hero h1 {
    font-size: var(--text-2xl);
    max-width: 100%;
  }
  .hero-subtitle {
    max-width: 100%;
  }
  .hero-ctas {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-ctas .btn {
    width: 100%;
    text-align: center;
  }
  .products-grid {
    grid-template-columns: 1fr;
  }
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reels-grid {
    grid-template-columns: 1fr;
  }
  .reel-container {
    max-width: 100%;
  }
  .videos-grid {
    grid-template-columns: 1fr;
  }
  .video-container {
    max-width: 100%;
  }
}