/**
 * @file    : css/layout.css
 * @purpose : 佈局系統 - Container、Navbar、Footer
 * @depends : ['css/variables.css']
 */

/* ========================================
   Container
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

/* ========================================
   Navbar - 2026 AI 科技風格升級
   毛玻璃效果 + Sticky 過渡 + 發光 CTA
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  /* 🌑 深色毛玻璃 - 高端 AI 科技風格 */
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: linear-gradient(
    180deg,
    rgba(30, 25, 22, 0.92) 0%,
    /* 深咖啡黑 */ rgba(45, 35, 28, 0.88) 100% /* 溫暖深棕 */
  );
  /* 底部金線 - 高級感 */
  border-bottom: 1px solid rgba(210, 165, 90, 0.35);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.25),
    0 0 40px rgba(210, 105, 30, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Sticky 狀態 - 滾動後更深 */
.navbar-scrolled {
  background: linear-gradient(
    180deg,
    rgba(25, 20, 18, 0.96) 0%,
    rgba(40, 30, 24, 0.94) 100%
  );
  box-shadow:
    0 6px 30px rgba(0, 0, 0, 0.35),
    0 0 50px rgba(210, 105, 30, 0.15);
}

.navbar-scrolled .nav-container {
  padding-top: 6px;
  padding-bottom: 6px;
}

.navbar-scrolled .logo-text {
  font-size: 1.5rem;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 10px var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding 0.3s ease;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Logo 文字 - AI 強烈漸層 (橘→金→深紅) */
.logo-text {
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  /* 強烈三色漸層效果 */
  background: linear-gradient(
    135deg,
    #d2691e 0%,
    /* 琥珀橘 */ #ffb347 35%,
    /* 亮金橘 */ #ff8c00 65%,
    /* 深橘 */ #b8860b 100% /* 暗金 */
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  /* 額外文字陰影增強可見度 */
  filter: drop-shadow(0 1px 2px rgba(210, 105, 30, 0.3));
  transition: all 0.3s ease;
}

.logo-text:hover {
  filter: drop-shadow(0 2px 4px rgba(210, 105, 30, 0.4)) brightness(1.1);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  /* 擴大間距 - 呼吸感 */
}

.nav-link {
  /* 🌒 深色背景需要淺色文字 */
  color: rgba(255, 250, 245, 0.9);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
  position: relative;
}

.nav-link:hover {
  color: var(--color-accent);
  background: rgba(210, 165, 90, 0.15);
}

/* 當前頁面高亮 */
.nav-link-active {
  color: var(--color-accent) !important;
  background: rgba(210, 165, 90, 0.12);
  cursor: default;
}

/* 導航連結底線動畫 */
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
  border-radius: 1px;
}

.nav-link:hover::after {
  width: 60%;
}

/* CTA 按鈕 - 2026 AI 能量核心 (專家優化版) */
.nav-cta {
  /* 🎨 加深漸層起始色 (APCA 對比優化) */
  background: linear-gradient(135deg, #c05000 0%, #a87000 100%);
  color: #ffffff !important;
  /* 📐 精簡 padding */
  padding: 7px 20px;
  /* 🔲 圓角方形 - 2026 科技感 */
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  /* 三層發光 + 內發光 */
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.15),
    0 0 10px rgba(192, 80, 0, 0.5),
    0 4px 20px rgba(192, 80, 0, 0.35),
    0 8px 32px rgba(192, 80, 0, 0.2);
  border: 1px solid rgba(255, 200, 100, 0.35);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
  /* ✨ 呼吸微動畫 */
  animation: nav-cta-breathe 3s ease-in-out infinite;
  position: relative;
  overflow: hidden;
}

/* 呼吸發光動畫 - 能量核心效果 */
@keyframes nav-cta-breathe {
  0%,
  100% {
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.15),
      0 0 10px rgba(192, 80, 0, 0.5),
      0 4px 20px rgba(192, 80, 0, 0.35),
      0 8px 32px rgba(192, 80, 0, 0.2);
  }

  50% {
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.2),
      0 0 18px rgba(255, 140, 0, 0.6),
      0 4px 28px rgba(255, 140, 0, 0.4),
      0 8px 40px rgba(192, 80, 0, 0.25);
  }
}

.nav-cta::after {
  display: none;
}

/* 🎯 Focus 狀態 - 無障礙合規 */
.nav-cta:focus-visible {
  outline: 3px solid rgba(255, 200, 100, 0.8);
  outline-offset: 3px;
  animation: none;
}

.nav-cta:hover {
  background: linear-gradient(135deg, #e06000 0%, #c05000 100%);
  color: #ffffff !important;
  transform: translateY(-3px) scale(1.03);
  /* 懸停時停止呼吸，改為穩定強發光 */
  animation: none;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.25),
    0 0 20px rgba(255, 140, 0, 0.7),
    0 6px 30px rgba(224, 96, 0, 0.45),
    0 12px 50px rgba(192, 80, 0, 0.3);
}

/* Mobile Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  /* 🌒 深色背景需要淺色漢堡線 */
  background: rgba(255, 250, 245, 0.9);
  transition: var(--transition-fast);
}

/* ========================================
   Footer - Warm Luxury Style
   ======================================== */
.footer {
  position: relative;
  background: linear-gradient(180deg, #4a3428 0%, #3d2b1f 50%, #2e1f16 100%);
  color: var(--bg-light);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  text-align: center;
  overflow: hidden;
}

/* 背景網格效果 */
.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200, 170, 130, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 170, 130, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

/* 頂部漸層邊框 */
.footer::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-primary) 20%,
    var(--color-accent) 50%,
    var(--color-primary) 80%,
    transparent 100%
  );
}

.footer-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}

.footer-brand {
  font-size: var(--font-size-3xl);
  font-weight: 900;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-accent)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 2px 20px rgba(230, 126, 34, 0.3);
}

.footer-tagline {
  font-size: var(--font-size-lg);
  color: rgba(253, 249, 243, 0.85);
  font-weight: 300;
  letter-spacing: 0.1em;
  margin-bottom: 0;
}

.footer-divider {
  width: 80px;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-primary),
    transparent
  );
  margin: var(--spacing-lg) 0;
  border-radius: 1px;
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: rgba(253, 249, 243, 0.5);
  margin-bottom: 0;
}

/* ========================================
   Footer Quick Nav
   ======================================== */
.footer-quick-nav {
  margin-bottom: var(--spacing-3xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid rgba(200, 170, 130, 0.2);
}

.footer-section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent);
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.footer-section-subtitle {
  font-size: var(--font-size-base);
  color: rgba(253, 249, 243, 0.6);
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.footer-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.footer-nav-card {
  background: rgba(255, 250, 245, 0.08);
  border: 1px solid rgba(200, 170, 130, 0.25);
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  transition: all 0.3s ease;
  display: block;
}

.footer-nav-card:hover {
  background: rgba(255, 250, 245, 0.15);
  border-color: var(--color-primary);
  transform: translateY(-3px);
}

.footer-nav-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.footer-nav-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: rgba(253, 249, 243, 0.95);
  margin-bottom: 6px;
}

.footer-nav-card p {
  font-size: 0.85rem;
  color: rgba(253, 249, 243, 0.6);
  margin-bottom: 12px;
  line-height: 1.4;
}

/* 當前頁面高亮狀態 */
.footer-nav-card-current {
  background: rgba(210, 105, 30, 0.25);
  border-color: var(--color-primary);
  pointer-events: none;
}

.footer-nav-card-current .footer-nav-tag {
  background: rgba(255, 255, 255, 0.2);
}

.footer-nav-tag {
  display: inline-block;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-accent)
  );
  color: white;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
}

/* ========================================
   Responsive
   ======================================== */

/* Tablet (768px~1024px) — 壓縮導航間距，保持完整顯示 */
@media (max-width: 1024px) {
  .nav-menu {
    gap: var(--spacing-md);
  }

  .nav-link {
    font-size: 0.9rem;
    padding: 4px 8px;
  }

  .nav-cta {
    padding: 6px 16px;
    font-size: 0.9rem;
  }
}

/* Mobile (<768px) — 漢堡選單 */
@media (max-width: 767px) {
  /* Compact navbar for mobile / LINE in-app browser */
  .navbar {
    padding-top: env(safe-area-inset-top, 0px);
  }

  .nav-container {
    padding-top: 6px;
    padding-bottom: 6px;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    /* 🌑 手機版深色毛玻璃 */
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: linear-gradient(
      180deg,
      rgba(30, 25, 22, 0.95) 0%,
      rgba(45, 35, 28, 0.92) 100%
    );
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(210, 165, 90, 0.35);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  /* Footer Quick Nav — 2 欄 */
  .footer-nav-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .footer-nav-card {
    padding: 16px;
  }

  .footer-nav-icon {
    font-size: 1.6rem;
  }

  .footer-nav-card h4 {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .footer-nav-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   iframe-mode: PRO360 嵌入時自動啟用
   偵測邏輯在 <head> inline script
   ============================================================ */
.iframe-mode .navbar {
  display: none;
}

.iframe-mode .footer {
  display: none;
}

/* iframe 內 body 適配：移除 navbar 留的空間，確保內容可滾動 */
.iframe-mode body {
  padding-top: 0 !important;
  margin-top: 0 !important;
}

/* Hero 區域：移除為 fixed navbar 預留的 padding */
.iframe-mode .hero {
  padding-top: 32px !important;
}

/* 所有 section 確保不被裁切 */
.iframe-mode section {
  overflow: visible;
}