/* ===========================
   WILDGAIN GROUP - style.css
   =========================== */

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

:root {
  --bg-main:        #1a1a1a;
  --bg-card:        #242424;
  --bg-nav:         #111111;
  --accent:         #c0392b;
  --accent-hover:   #e74c3c;
  --text-primary:   #f0f0f0;
  --text-secondary: #aaaaaa;
  --text-logo:      #cccccc;
  --border:         #333333;
  --white:          #ffffff;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: 'Noto Sans TC', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.05em;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* --- Layout --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

/* --- Navigation --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border);
  height: 64px;
  display: flex;
  align-items: center;
}

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

.nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-logo);
  letter-spacing: 0.1em;
}

.nav-logo span {
  color: var(--accent);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  transition: color 0.2s;
}

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

.nav-links a.active {
  color: var(--accent);
}

/* --- Hamburger (mobile) --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--bg-main);
  position: relative;
  overflow: hidden;
  padding-top: 64px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(192,57,43,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-logo-text {
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 900;
  color: var(--text-logo);
  letter-spacing: 0.15em;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.hero-en {
  font-size: clamp(0.9rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-tagline {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border: 1px solid var(--accent);
  color: var(--text-primary);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  transition: background 0.2s, color 0.2s;
  cursor: pointer;
  background: transparent;
}

.btn:hover {
  background: var(--accent);
  color: var(--white);
}

.btn-solid {
  background: var(--accent);
  color: var(--white);
}

.btn-solid:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* --- Brand Cards (集團首頁) --- */
.brands {
  padding: 80px 0;
}

.brands-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin-top: 48px;
}

.brand-card {
  background: var(--bg-card);
  padding: 48px 32px;
  border: 1px solid var(--border);
  transition: border-color 0.3s, transform 0.3s;
  cursor: pointer;
  text-align: center;
}

.brand-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.brand-card .brand-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.brand-card h3 {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}

.brand-card .brand-en {
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.brand-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* --- Section Header --- */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  color: var(--text-primary);
}

.section-header .section-en {
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-divider {
  width: 40px;
  height: 2px;
  background: var(--accent);
  margin: 16px auto 0;
}

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px;
  transition: border-color 0.3s;
}

.card:hover {
  border-color: var(--accent);
}

.card h3 {
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* --- Tabs --- */
.tabs-nav {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
  gap: 0;
}

.tab-btn {
  padding: 14px 28px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 0.95rem;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  letter-spacing: 0.05em;
  margin-bottom: -1px;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* --- Footer --- */
footer {
  background: var(--bg-nav);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 1.2rem;
  color: var(--text-logo);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.footer-brand p {
  font-size: 0.875rem;
}

.footer-col h4 {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.footer-col ul li a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin: 0;
}

.social-links {
  display: flex;
  gap: 20px;
}

.social-links a {
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  transition: color 0.2s;
}

.social-links a:hover {
  color: var(--accent);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .brands-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-nav);
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .tabs-nav {
    overflow-x: auto;
  }

  .tab-btn {
    white-space: nowrap;
    padding: 14px 20px;
  }
}