/* ============================================================
   AMBEREN D2C — Brand Style System
   Real Science. Real Relief.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* --- Brand Tokens --- */
:root {
  /* Primary */
  --red: #C8102E;
  --orange: #E87722;
  --warm-orange: #F26522;

  /* Secondary */
  --gold: #FFB81C;
  --deep-red: #8B1A1A;

  /* Neutrals */
  --cream: #FFF8F2;
  --warm-cream: #FFF0E0;
  --light-grey: #F5F5F5;
  --white: #FFFFFF;
  --charcoal: #2D2D2D;

  /* Gradients */
  --grad-brand: linear-gradient(135deg, #C8102E 0%, #E87722 100%);
  --grad-dark: linear-gradient(135deg, #C8102E 0%, #8B1A1A 100%);
  --grad-warm: linear-gradient(135deg, #E87722 0%, #F26522 100%);
  --grad-subtle: linear-gradient(135deg, #FFF8F2 0%, #FFF0E0 100%);
  --grad-hero: linear-gradient(160deg, #C8102E 0%, #D4452A 40%, #E87722 100%);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(45,45,45,0.06), 0 1px 2px rgba(45,45,45,0.04);
  --shadow-md: 0 4px 12px rgba(45,45,45,0.08), 0 2px 4px rgba(45,45,45,0.04);
  --shadow-lg: 0 12px 40px rgba(200,16,46,0.12), 0 4px 12px rgba(45,45,45,0.06);
  --shadow-xl: 0 20px 60px rgba(200,16,46,0.15), 0 8px 20px rgba(45,45,45,0.08);

  /* Typography */
  --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing scale */
  --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;

  /* Layout */
  --container: 1200px;
  --container-wide: 1400px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 100px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.3s;
  --duration-slow: 0.5s;
}

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

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--charcoal);
  background: var(--white);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
input, select, textarea { font-family: inherit; font-size: inherit; }

/* --- Utility --- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--sp-6); }
.container-wide { max-width: var(--container-wide); margin: 0 auto; padding: 0 var(--sp-6); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.35rem); }

.eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.body-lg { font-size: 1.125rem; line-height: 1.7; }
.body-sm { font-size: 0.875rem; line-height: 1.6; }
.caption { font-size: 0.75rem; line-height: 1.5; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  transition: all var(--duration) var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.15);
  opacity: 0;
  transition: opacity var(--duration) var(--ease-out);
}

.btn:hover::after { opacity: 1; }

.btn-primary {
  background: var(--grad-brand);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(200,16,46,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200,16,46,0.4);
}

.btn-secondary {
  background: var(--white);
  color: var(--red);
  border: 2px solid var(--red);
}

.btn-secondary:hover {
  background: var(--cream);
  transform: translateY(-1px);
}

.btn-white {
  background: var(--white);
  color: var(--red);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.btn-ghost {
  background: transparent;
  color: var(--red);
  padding: 12px 24px;
}

.btn-ghost:hover { background: rgba(200,16,46,0.06); }

.btn-sm { padding: 10px 22px; font-size: 0.85rem; }
.btn-lg { padding: 18px 40px; font-size: 1.05rem; }

/* --- Badge / Tag --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius-pill);
}

.badge-red { background: var(--red); color: var(--white); }
.badge-orange { background: var(--orange); color: var(--white); }
.badge-gold { background: rgba(255,184,28,0.15); color: #B8860B; }
.badge-outline { background: transparent; border: 1.5px solid var(--red); color: var(--red); }

/* --- Cards --- */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* --- Header / Navigation --- */
.site-header {
  position: fixed;
  top: 38px;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(200,16,46,0.06);
  transition: all var(--duration) var(--ease-out);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--sp-8);
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--red);
  text-transform: uppercase;
  position: relative;
}

.logo img {
  border-radius: 8px;
}

.logo span {
  display: block;
  font-size: 0.5rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: var(--charcoal);
  margin-top: -2px;
  text-transform: uppercase;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav-main a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--charcoal);
  transition: color var(--duration) var(--ease-out);
  position: relative;
}

.nav-main a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--grad-brand);
  border-radius: 1px;
  transition: width var(--duration) var(--ease-out);
}

.nav-main a:hover { color: var(--red); }
.nav-main a:hover::after { width: 100%; }
.nav-main a.active { color: var(--red); }
.nav-main a.active::after { width: 100%; }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.header-actions .icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background var(--duration) var(--ease-out);
  color: var(--charcoal);
}

.header-actions .icon-btn:hover {
  background: var(--cream);
  color: var(--red);
}

.cart-count {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  background: var(--red);
  color: var(--white);
  font-size: 0.65rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Mobile menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}

.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--charcoal);
  border-radius: 1px;
  transition: all var(--duration) var(--ease-out);
}

/* --- Announcement Bar --- */
.announcement-bar {
  background: var(--grad-brand);
  color: var(--white);
  text-align: center;
  padding: 8px var(--sp-6);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.announcement-bar a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* --- Footer --- */
.site-footer {
  background: var(--charcoal);
  color: rgba(255,255,255,0.8);
  padding: var(--sp-20) 0 var(--sp-10);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-brand);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1.2fr;
  gap: var(--sp-10);
  margin-bottom: var(--sp-16);
}

.footer-brand .logo {
  color: var(--white);
  margin-bottom: var(--sp-4);
}

.footer-brand .logo span { color: rgba(255,255,255,0.5); }

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
  max-width: 280px;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-5);
}

.footer-col ul { display: flex; flex-direction: column; gap: var(--sp-3); }

.footer-col a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--duration) var(--ease-out);
}

.footer-col a:hover { color: var(--gold); }

.footer-newsletter p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--sp-4);
}

.footer-newsletter-form {
  display: flex;
  gap: var(--sp-2);
}

.footer-newsletter-form input {
  flex: 1;
  padding: 12px 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  color: var(--white);
  outline: none;
  transition: border-color var(--duration) var(--ease-out);
}

.footer-newsletter-form input::placeholder { color: rgba(255,255,255,0.35); }
.footer-newsletter-form input:focus { border-color: var(--gold); }

.footer-newsletter-form button {
  padding: 12px 20px;
  background: var(--grad-brand);
  color: var(--white);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  transition: opacity var(--duration) var(--ease-out);
}

.footer-newsletter-form button:hover { opacity: 0.9; }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--sp-8);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

.footer-legal-links {
  display: flex;
  gap: var(--sp-6);
}

.footer-legal-links a:hover { color: rgba(255,255,255,0.7); }

/* --- Section helpers --- */
.section { padding: var(--sp-20) 0; }
.section-sm { padding: var(--sp-16) 0; }
.section-lg { padding: var(--sp-24) 0; }

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--sp-12);
}

.section-header .eyebrow {
  color: var(--orange);
  margin-bottom: var(--sp-3);
}

.section-header h2 {
  color: var(--red);
  margin-bottom: var(--sp-4);
}

.section-header p {
  font-size: 1.1rem;
  color: rgba(45,45,45,0.7);
  line-height: 1.7;
}

/* --- Disclaimer Bar --- */
.disclaimer-bar {
  background: var(--light-grey);
  padding: var(--sp-6) 0;
  text-align: center;
}

.disclaimer-bar p {
  font-size: 0.75rem;
  color: rgba(45,45,45,0.45);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

.bg-cream { background: var(--cream); }
.bg-warm-cream { background: var(--warm-cream); }
.bg-gradient { background: var(--grad-brand); color: var(--white); }
.bg-dark { background: var(--charcoal); color: var(--white); }

/* --- Form inputs --- */
.form-group { margin-bottom: var(--sp-5); }

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: var(--sp-2);
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid #E0E0E0;
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--charcoal);
  outline: none;
  transition: all var(--duration) var(--ease-out);
}

.form-input:focus {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(200,16,46,0.08);
}

.form-input::placeholder { color: #B0B0B0; }

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%232D2D2D' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

/* --- Scroll-driven refinements --- */
.section-header h2 {
  position: relative;
  display: inline-block;
}

/* Warm underline accent on section headers */
.section-header h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--grad-brand);
  border-radius: 2px;
  margin: var(--sp-3) auto 0;
}

/* Card focus ring for accessibility */
a.product-card:focus-visible,
a.blog-card:focus-visible,
a.featured-post:focus-visible {
  outline: 3px solid var(--red);
  outline-offset: 2px;
  border-radius: var(--radius-xl);
}

/* --- Animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.7s var(--ease-out);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-8);
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .announcement-bar {
    font-size: 0.72rem;
    padding: 7px var(--sp-3);
  }

  .announcement-bar .desktop-only {
    display: none;
  }

  .site-header {
    top: 30px;
  }

  .nav-main {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(200,16,46,0.08);
    box-shadow: var(--shadow-md);
    padding: var(--sp-4) var(--sp-6);
  }
  .nav-main.open { display: flex; }
  .nav-main a {
    padding: var(--sp-3) 0;
    border-bottom: 1px solid rgba(0,0,0,0.04);
  }
  .nav-main a:last-child { border-bottom: none; }
  .nav-main a::after { display: none; }

  .menu-toggle { display: flex; }
  .menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-6);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--sp-4);
    text-align: center;
  }

  .section { padding: var(--sp-16) 0; }
  .section-lg { padding: var(--sp-20) 0; }

  .header-inner { padding: 0 var(--sp-4); height: 64px; }
}