/* ========================================
   Minerdog Portal — Styles
   現代毛玻璃設計系統
   ======================================== */

/* ── 設計 Token ── */
:root {
  /* 色彩 — 亮色主題 */
  --clr-bg-from: hsl(230 60% 95%);
  --clr-bg-to: hsl(280 50% 92%);
  --clr-surface: hsl(0 0% 100% / 0.55);
  --clr-surface-border: hsl(0 0% 100% / 0.7);
  --clr-surface-hover: hsl(0 0% 100% / 0.72);

  --clr-orb-1: hsl(250 80% 70% / 0.5);
  --clr-orb-2: hsl(200 90% 65% / 0.4);
  --clr-orb-3: hsl(310 70% 75% / 0.35);

  --clr-text-primary: hsl(230 30% 18%);
  --clr-text-secondary: hsl(230 15% 45%);
  --clr-text-muted: hsl(230 10% 62%);

  --clr-accent-primary: hsl(250 85% 60%);
  --clr-accent-secondary: hsl(200 85% 50%);
  --clr-accent-card: hsl(160 70% 45%);

  --clr-badge-primary-bg: hsl(250 80% 94%);
  --clr-badge-primary-text: hsl(250 70% 45%);
  --clr-badge-accent-bg: hsl(160 65% 90%);
  --clr-badge-accent-text: hsl(160 60% 30%);

  --clr-footer-text: hsl(230 15% 55%);
  --clr-footer-link: hsl(250 70% 55%);

  /* 陰影 */
  --shadow-card: 0 8px 32px hsl(250 40% 20% / 0.08), 0 2px 8px hsl(250 40% 20% / 0.04);
  --shadow-card-hover: 0 20px 60px hsl(250 40% 20% / 0.15), 0 4px 16px hsl(250 40% 20% / 0.06);
  --shadow-glow: 0 0 60px hsl(250 80% 60% / 0.15);
  --shadow-glow-accent: 0 0 60px hsl(160 70% 45% / 0.15);

  /* 間距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1.25rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 5rem;

  /* 圓角 */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;

  /* 字型 */
  --font-body: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* 動畫 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* 模糊 */
  --blur-glass: blur(20px) saturate(180%);
}

/* 深色模式 */
@media (prefers-color-scheme: dark) {
  :root {
    --clr-bg-from: hsl(230 30% 8%);
    --clr-bg-to: hsl(270 25% 10%);
    --clr-surface: hsl(230 20% 16% / 0.65);
    --clr-surface-border: hsl(0 0% 100% / 0.08);
    --clr-surface-hover: hsl(230 20% 20% / 0.8);

    --clr-orb-1: hsl(250 70% 55% / 0.3);
    --clr-orb-2: hsl(200 80% 50% / 0.25);
    --clr-orb-3: hsl(310 60% 55% / 0.2);

    --clr-text-primary: hsl(230 20% 92%);
    --clr-text-secondary: hsl(230 15% 65%);
    --clr-text-muted: hsl(230 10% 45%);

    --clr-accent-primary: hsl(250 80% 70%);
    --clr-accent-secondary: hsl(200 80% 65%);
    --clr-accent-card: hsl(160 65% 55%);

    --clr-badge-primary-bg: hsl(250 40% 25%);
    --clr-badge-primary-text: hsl(250 80% 78%);
    --clr-badge-accent-bg: hsl(160 35% 18%);
    --clr-badge-accent-text: hsl(160 65% 68%);

    --clr-footer-text: hsl(230 15% 45%);
    --clr-footer-link: hsl(250 70% 68%);

    --shadow-card: 0 8px 32px hsl(0 0% 0% / 0.3), 0 2px 8px hsl(0 0% 0% / 0.2);
    --shadow-card-hover: 0 20px 60px hsl(0 0% 0% / 0.4), 0 4px 16px hsl(0 0% 0% / 0.25);
  }
}

/* 強制深色覆蓋（JS toggle） */
[data-theme="dark"] {
  --clr-bg-from: hsl(230 30% 8%);
  --clr-bg-to: hsl(270 25% 10%);
  --clr-surface: hsl(230 20% 16% / 0.65);
  --clr-surface-border: hsl(0 0% 100% / 0.08);
  --clr-surface-hover: hsl(230 20% 20% / 0.8);
  --clr-orb-1: hsl(250 70% 55% / 0.3);
  --clr-orb-2: hsl(200 80% 50% / 0.25);
  --clr-orb-3: hsl(310 60% 55% / 0.2);
  --clr-text-primary: hsl(230 20% 92%);
  --clr-text-secondary: hsl(230 15% 65%);
  --clr-text-muted: hsl(230 10% 45%);
  --clr-accent-primary: hsl(250 80% 70%);
  --clr-accent-secondary: hsl(200 80% 65%);
  --clr-accent-card: hsl(160 65% 55%);
  --clr-badge-primary-bg: hsl(250 40% 25%);
  --clr-badge-primary-text: hsl(250 80% 78%);
  --clr-badge-accent-bg: hsl(160 35% 18%);
  --clr-badge-accent-text: hsl(160 65% 68%);
  --clr-footer-text: hsl(230 15% 45%);
  --clr-footer-link: hsl(250 70% 68%);
  --shadow-card: 0 8px 32px hsl(0 0% 0% / 0.3), 0 2px 8px hsl(0 0% 0% / 0.2);
  --shadow-card-hover: 0 20px 60px hsl(0 0% 0% / 0.4), 0 4px 16px hsl(0 0% 0% / 0.25);
}

[data-theme="light"] {
  --clr-bg-from: hsl(230 60% 95%);
  --clr-bg-to: hsl(280 50% 92%);
  --clr-surface: hsl(0 0% 100% / 0.55);
  --clr-surface-border: hsl(0 0% 100% / 0.7);
  --clr-surface-hover: hsl(0 0% 100% / 0.72);
  --clr-orb-1: hsl(250 80% 70% / 0.5);
  --clr-orb-2: hsl(200 90% 65% / 0.4);
  --clr-orb-3: hsl(310 70% 75% / 0.35);
  --clr-text-primary: hsl(230 30% 18%);
  --clr-text-secondary: hsl(230 15% 45%);
  --clr-text-muted: hsl(230 10% 62%);
  --clr-accent-primary: hsl(250 85% 60%);
  --clr-accent-secondary: hsl(200 85% 50%);
  --clr-accent-card: hsl(160 70% 45%);
  --clr-badge-primary-bg: hsl(250 80% 94%);
  --clr-badge-primary-text: hsl(250 70% 45%);
  --clr-badge-accent-bg: hsl(160 65% 90%);
  --clr-badge-accent-text: hsl(160 60% 30%);
  --clr-footer-text: hsl(230 15% 55%);
  --clr-footer-link: hsl(250 70% 55%);
  --shadow-card: 0 8px 32px hsl(250 40% 20% / 0.08), 0 2px 8px hsl(250 40% 20% / 0.04);
  --shadow-card-hover: 0 20px 60px hsl(250 40% 20% / 0.15), 0 4px 16px hsl(250 40% 20% / 0.06);
}

/* ── 基礎重置 ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  color-scheme: light dark;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--clr-text-primary);
  background: linear-gradient(135deg in oklab, var(--clr-bg-from), var(--clr-bg-to));
  min-block-size: 100dvh;
  overflow-x: hidden;
  transition: background var(--transition-base), color var(--transition-base);
}

/* ── 背景裝飾球 ── */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  will-change: transform;
  animation: float-orb linear infinite;
  transform: translate(var(--parallax-x, 0), var(--parallax-y, 0));
}

.orb-1 {
  inline-size: 600px;
  block-size: 600px;
  background: var(--clr-orb-1);
  inset-block-start: -100px;
  inset-inline-start: -100px;
  animation-duration: 20s;
}

.orb-2 {
  inline-size: 500px;
  block-size: 500px;
  background: var(--clr-orb-2);
  inset-block-end: -80px;
  inset-inline-end: -80px;
  animation-duration: 25s;
  animation-direction: reverse;
}

.orb-3 {
  inline-size: 400px;
  block-size: 400px;
  background: var(--clr-orb-3);
  inset-block-start: 50%;
  inset-inline-start: 50%;
  translate: -50% -50%;
  animation-duration: 18s;
  animation-delay: -5s;
}

@keyframes float-orb {
  0%, 100% { translate: 0 0; }
  25%       { translate: 30px -20px; }
  50%       { translate: -20px 30px; }
  75%       { translate: 20px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  .orb { animation: none; }
}

/* ── 頁面容器 ── */
.page-wrapper {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-block-size: 100dvh;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}

/* ── 頁首 ── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--spacing-lg);
}

.logo-mark {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--clr-accent-primary);
  font-size: 1.2rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  text-decoration: none;
}

.logo-mark svg {
  flex-shrink: 0;
  transition: transform var(--transition-slow);
}

.logo-mark:hover svg {
  transform: rotate(15deg) scale(1.05);
}

/* 主題切換按鈕 */
.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--clr-surface-border);
  background: var(--clr-surface);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  cursor: pointer;
  font-size: 1.1rem;
  transition: background var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
}

.theme-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-card);
}

.theme-btn:focus-visible {
  outline: 2px solid var(--clr-accent-primary);
  outline-offset: 3px;
}

.theme-icon {
  display: none;
}

:root:not([data-theme]) .theme-icon--light,
[data-theme="light"] .theme-icon--light {
  display: block;
}

[data-theme="dark"] .theme-icon--dark,
:root:not([data-theme]) .theme-icon--dark {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-icon--light { display: none; }
  :root:not([data-theme]) .theme-icon--dark  { display: block; }
}

/* ── 主內容 ── */
.main-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xl);
  padding-block: var(--spacing-xl);
}

/* ── Hero 區塊 ── */
.hero {
  text-align: center;
  max-inline-size: 56ch;
}

.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-accent-primary);
  margin-block-end: var(--spacing-sm);
}

.hero-title {
  font-size: clamp(2.25rem, 1.5rem + 4vw, 4rem);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--clr-text-primary);
  text-wrap: balance;
  margin-block-end: var(--spacing-md);
}

.hero-title-accent {
  background: linear-gradient(135deg in oklch, var(--clr-accent-primary), var(--clr-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.15rem);
  color: var(--clr-text-secondary);
  font-weight: var(--font-weight-light);
  text-wrap: pretty;
}

/* ── 卡片區 ── */
.cards-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
  gap: var(--spacing-lg);
  inline-size: 100%;
  max-inline-size: 780px;
}

/* ── 個別卡片 ── */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-xl) var(--spacing-lg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--clr-surface-border);
  background: var(--clr-surface);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition:
    transform var(--transition-slow),
    box-shadow var(--transition-base),
    background var(--transition-base);
}

.card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-card-hover);
  background: var(--clr-surface-hover);
}

.card:hover .card-arrow {
  transform: translateX(5px);
  opacity: 1;
}

.card:hover .card-glow {
  opacity: 1;
}

.card:focus-visible {
  outline: 2px solid var(--clr-accent-primary);
  outline-offset: 3px;
}

/* 卡片光暈效果 */
.card-glow {
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg in oklch, var(--clr-accent-primary), var(--clr-accent-secondary));
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-base);
  padding: 1px;
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.card--accent .card-glow {
  background: linear-gradient(135deg in oklch, var(--clr-accent-card), var(--clr-accent-secondary));
}

/* 圖標 */
.card-icon {
  inline-size: 3.5rem;
  block-size: 3.5rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg in oklch, var(--clr-accent-primary), var(--clr-accent-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 20px var(--clr-accent-primary);
  transition: transform var(--transition-slow), box-shadow var(--transition-base);
}

.card--accent .card-icon {
  background: linear-gradient(135deg in oklch, var(--clr-accent-card), var(--clr-accent-secondary));
  box-shadow: 0 4px 20px var(--clr-accent-card);
}

.card:hover .card-icon {
  transform: scale(1.08) rotate(-3deg);
}

/* 標籤 */
.card-badge {
  display: inline-block;
  padding: 0.2em 0.75em;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--clr-badge-primary-bg);
  color: var(--clr-badge-primary-text);
  inline-size: fit-content;
}

.card--accent .card-badge {
  background: var(--clr-badge-accent-bg);
  color: var(--clr-badge-accent-text);
}

/* 卡片內容 */
.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  flex: 1;
}

.card-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  color: var(--clr-text-primary);
}

.card-desc {
  font-size: 0.95rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
  text-wrap: pretty;
}

/* 箭頭 */
.card-arrow {
  color: var(--clr-accent-primary);
  opacity: 0.5;
  align-self: flex-end;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.card--accent .card-arrow {
  color: var(--clr-accent-card);
}

/* ── 頁尾 ── */
.site-footer {
  text-align: center;
  padding-block: var(--spacing-lg);
  font-size: 0.85rem;
  color: var(--clr-footer-text);
}

.site-footer a {
  color: var(--clr-footer-link);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.site-footer a:hover {
  opacity: 0.75;
}

/* ── 響應式調整 ── */
@media (max-width: 480px) {
  .card {
    padding: var(--spacing-lg) var(--spacing-md);
  }
}