/* ==========================================================================
   KT FITNESS & NUTRITION - DESIGN SYSTEM & STYLES
   Inspired by Peeta Fitness & Modern Health Influencer Web Aesthetics
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@700;800;900&family=Noto+Sans+TC:wght@300;400;500;700;900&family=Outfit:wght@400;600;800;900&family=Syne:wght@700;800&display=swap');

:root {
  /* Color Palette */
  --primary: #e63946;
  --primary-hover: #d62839;
  --primary-light: rgba(230, 57, 70, 0.15);
  --secondary: #1d3557;
  --accent: #457b9d;
  --accent-light: #a8dadc;
  
  /* Pure Pitch Black Default Theme (Dark Mode Default) */
  --bg-main: #000000;
  --bg-card: #0a0a0a;
  --bg-alt: #121212;
  --text-main: #ffffff;
  --text-muted: #a1a1aa;
  --border-color: #27272a;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.8);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.9);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.95);

  /* Light Theme Overrides (if toggled) */
  --light-bg-main: #f8fafc;
  --light-bg-card: #ffffff;
  --light-bg-alt: #f1f5f9;
  --light-text-main: #0f172a;
  --light-text-muted: #64748b;
  --light-border-color: #e2e8f0;

  /* Typography */
  --font-main: 'Noto Sans TC', 'Outfit', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', 'Noto Sans TC', sans-serif;

  /* Spacing & Layout */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --max-width: 1240px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Theme Switching */
body.light-theme {
  --bg-main: var(--light-bg-main);
  --bg-card: var(--light-bg-card);
  --bg-alt: var(--light-bg-alt);
  --text-main: var(--light-text-main);
  --text-muted: var(--light-text-muted);
  --border-color: var(--light-border-color);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}

body.light-theme .site-header {
  background-color: #ffffff;
  border-bottom: 2px solid #e2e8f0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

/* Global Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   TOP ANNOUNCEMENT BAR
   ========================================================================== */
.top-bar {
  background: #000000;
  border-bottom: 1px solid #1a1a1a;
  color: #ffffff;
  font-size: 0.875rem;
  padding: 0.5rem 0;
  text-align: center;
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-bar-notice {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.badge-new {
  background-color: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  text-transform: uppercase;
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.top-bar-link {
  color: rgba(255,255,255,0.85);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.top-bar-link:hover {
  color: #ffffff;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #000000;
  border-bottom: 3px solid #ffffff;
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.45), 0 0 15px rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

/* Logo */
.brand-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
}

.brand-logo:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.brand-title {
  font-family: 'Montserrat', 'Outfit', sans-serif;
  font-size: 1.7rem;
  font-weight: 900;
  color: #ffffff !important;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
}

.brand-title span {
  color: #ffffff !important;
}

.logo-badge,
.brand-subtitle {
  display: none !important;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.6rem 1.1rem;
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.8), 0 0 16px rgba(255, 255, 255, 0.4);
}

.nav-link:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.15);
  text-shadow: 0 0 12px rgba(255, 255, 255, 1), 0 0 22px rgba(255, 255, 255, 0.7);
}

.nav-link.active {
  color: #000000 !important;
  background-color: #ffffff !important;
  font-weight: 800 !important;
  text-shadow: none !important;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.9), 0 0 28px rgba(255, 255, 255, 0.5);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  list-style: none;
  z-index: 1100;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: 0.6rem 1rem;
  color: var(--text-main);
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.dropdown-link:hover {
  background-color: var(--bg-alt);
  color: var(--primary);
}

/* Header Utilities */
.header-utils {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  background: var(--bg-alt);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
}

.icon-btn:hover {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.cart-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background-color: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #c52233);
  color: #ffffff;
  font-weight: 700;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 14px rgba(230, 57, 70, 0.35);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(230, 57, 70, 0.5);
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 2px solid var(--border-color);
  font-weight: 700;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

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

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 5rem 0 4rem;
  background: radial-gradient(circle at 80% 20%, var(--primary-light) 0%, transparent 40%),
              radial-gradient(circle at 10% 80%, rgba(29, 53, 87, 0.08) 0%, transparent 40%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(230, 57, 70, 0.2);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -1px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary), #e63946, #f1faee);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.stat-num span {
  color: var(--primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Hero Media Showcase */
.hero-media {
  position: relative;
}

.hero-card-featured {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 2;
  overflow: hidden;
}

.hero-banner-visual {
  height: 280px;
  background: linear-gradient(135deg, #1d3557, #0b0f19);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.hero-banner-visual::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: var(--primary);
  opacity: 0.3;
  filter: blur(50px);
  border-radius: 50%;
}

.hero-banner-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(230, 57, 70, 0.9);
  color: #fff;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.hero-banner-content h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.hero-banner-content p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
}

.hero-floating-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  z-index: 3;
}

.badge-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.badge-text strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-main);
}

.badge-text span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   FEATURED BANNER / PROMO SECTION
   ========================================================================== */
.section {
  padding: 4.5rem 0;
}

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

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.section-tag {
  color: var(--primary);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Promo Banner Grid */
.promo-card {
  background: linear-gradient(135deg, var(--secondary), #0f172a);
  border-radius: var(--radius-lg);
  color: #ffffff;
  padding: 2.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.promo-card::after {
  content: '';
  position: absolute;
  right: -100px;
  top: -100px;
  width: 300px;
  height: 300px;
  background: var(--primary);
  opacity: 0.15;
  filter: blur(60px);
  border-radius: 50%;
}

.promo-content h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.promo-content p {
  color: rgba(255,255,255,0.8);
  margin-bottom: 1.5rem;
  max-width: 600px;
}

/* ==========================================================================
   FOUNDER STORY & MYTHS (Peeta Style)
   ========================================================================== */
.story-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3.5rem;
  align-items: center;
}

.story-media {
  position: relative;
}

.story-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.story-quote {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  border-left: 4px solid var(--primary);
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.story-text {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 0.98rem;
}

/* Myths Cards 2x2 Grid */
.myths-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.myth-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: var(--transition);
}

.myth-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.myth-num {
  font-family: var(--font-heading);
  color: var(--primary);
  font-weight: 900;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.4rem;
}

.myth-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.myth-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   INTERACTIVE CALCULATOR SUITE (TDEE & BMR & FFMI)
   ========================================================================== */
.calc-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.calc-tabs {
  display: flex;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border-color);
}

.calc-tab {
  flex: 1;
  padding: 1.2rem 1rem;
  background: transparent;
  border: none;
  font-weight: 700;
  font-size: 1rem;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
  text-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
}

.calc-tab.active {
  background: #ffffff !important;
  color: #000000 !important;
  border-bottom: 3px solid #ffffff !important;
  font-weight: 800 !important;
  text-shadow: none !important;
}

.calc-body {
  padding: 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.gender-select {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.gender-btn {
  padding: 0.75rem;
  background: var(--bg-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 700;
  text-align: center;
  color: #ffffff;
  transition: var(--transition);
  text-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
}

.gender-btn.active {
  background: #ffffff !important;
  color: #000000 !important;
  border-color: #ffffff !important;
  font-weight: 800 !important;
  text-shadow: none !important;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.8);
}

/* Calculator Results Panel */
.calc-result-panel {
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.result-box {
  text-align: center;
  margin-bottom: 1.5rem;
}

.result-title {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.result-val {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.1;
  margin: 0.25rem 0;
}

.result-unit {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 500;
}

.macro-split {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

.macro-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  text-align: center;
}

.macro-card strong {
  display: block;
  font-size: 1.1rem;
  color: var(--text-main);
}

.macro-card span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   ARTICLES & KNOWLEDGE HUB
   ========================================================================== */
.category-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.pill-btn {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-shadow: 0 0 6px rgba(255, 255, 255, 0.7);
}

.pill-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
  border-color: #ffffff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.9);
}

.pill-btn.active {
  background: #ffffff !important;
  color: #000000 !important;
  border-color: #ffffff !important;
  font-weight: 800 !important;
  text-shadow: none !important;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.9), 0 0 24px rgba(255, 255, 255, 0.4);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.article-img-wrap {
  height: 200px;
  position: relative;
  background: linear-gradient(135deg, var(--secondary), #0f172a);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  overflow: hidden;
}

.article-category-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}

.article-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.article-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  flex: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.read-more-link {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.read-more-link:hover {
  gap: 0.6rem;
}

/* ==========================================================================
   ONLINE SHOP & SUPPLEMENT SHOWCASE
   ========================================================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.product-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: #10b981;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.product-visual {
  height: 180px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.product-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.product-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  flex: 1;
}

.product-price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.product-price {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--primary);
}

.btn-add-cart {
  background: var(--bg-alt);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-add-cart:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ==========================================================================
   CONTACT & CONSULTATION SECTION
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-icon {
  width: 46px;
  height: 46px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-detail h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.contact-detail p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-form-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   MODALS (Search & Cart & Article View)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 600px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 2rem;
  position: relative;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: var(--transition);
}

.modal-overlay.active .modal-container {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background-color: var(--dark-bg-main);
  color: #94a3b8;
  padding: 4.5rem 0 2rem;
  border-top: 1px solid var(--dark-border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand .brand-title {
  color: #ffffff;
}

.footer-desc {
  font-size: 0.9rem;
  margin: 1rem 0 1.5rem;
  line-height: 1.6;
}

.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-icon {
  width: 40px;
  height: 40px;
  background: var(--dark-bg-card);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-icon:hover {
  background: var(--primary);
  transform: translateY(-3px);
}

.footer-title {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--dark-border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--primary);
  color: #fff;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

/* Responsive Styles */
@media (max-width: 992px) {
  .hero-grid, .story-grid, .calc-body, .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .myths-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .promo-card {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}