/* --- main.css --- */
:root {
  --primary: #00a8f0;
  --bg: #1b212c;
  --card: #111;
  --card-2: #555;
  --text: #ffffff;
  --muted: #9ca3af;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  opacity: 0;
  animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

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

/* 圖片全域防爆設定 */
img {
  max-width: 100%;
  height: auto;
  display: block;
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  -o-user-drag: none;
  user-drag: none;
}

header {
  position: sticky;
  top: 0;
  background: rgba(27, 33, 44, 0.7);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #2a2f3a;
  z-index: 100;
  transition: 0.3s;
}

.nav {
  max-width: 1100px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 30px 20px;
}

.logo {
  font-size: 30px;
  font-weight: bold;
  color: var(--primary);
}

.nav-links { display: flex; gap: 20px; }
.nav-links a:hover { color: var(--primary); }

/* Hero Section */
.hero {
  text-align: center;
  padding: 120px 20px 80px;
  background: radial-gradient(circle at top, rgba(0,168,240,0.15), transparent 60%);
}

.hero img {
  width: 160px;
  margin: 0 auto 20px;
}

.hero h1 { font-size: 48px; }
.typing { color: var(--primary); }
.hero p { color: var(--muted); }

.btn {
  display: inline-block;
  padding: 12px 26px;
  background: var(--primary);
  color: var(--bg);
  border-radius: 999px;
  font-weight: bold;
  transition: 0.3s;
}

.btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(0,168,240,0.4);
}

/* Section Layout */
section {
  max-width: 1100px;
  margin: auto;
  padding: 20px 20px;
}

h2 {
  font-size: 28px;
  margin-bottom: 25px;
  border-left: 4px solid var(--primary);
  padding-left: 10px;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 34px; }
  .grid {
    grid-template-columns: 1fr; /* 手機版單欄顯示 */
  }
}

/* --- social.css --- */
/* Socials */
.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.social-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.3s;
  will-change: transform;
}

.social-icon:hover {
  background: var(--card-2);
  transform: translateY(-5px);
  box-shadow: 0 0 10px rgba(0,168,240,0.3);
}

/* --- friend.css --- */
/* Friends Section */
.friends {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
}

.friend-card {
  background: var(--card);
  padding: 20px;
  border-radius: 16px;
  text-align: center;
  transition: 0.3s;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.friend-card:hover {
  transform: translateY(-6px);
  background: var(--card-2);
}

.friend-avatar {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  margin: 0 auto 10px;
  overflow: hidden;
  background: #444;
  flex-shrink: 0;
}

.friend-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.friend-card p {
  margin: 0;
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- card.css --- */
.card {
  background: var(--card);
  padding: 25px;
  border-radius: 18px;
  transition: 0.3s;
  will-change: transform;
  
  /* 內部 Flex 佈局 */
  display: flex;
  flex-direction: column;
  height: 100%; /* 填滿 Grid 容器 */
  text-align: center;
}

.card:hover {
  transform: translateY(-8px);
  background: var(--card-2);
}

.card img {
  max-height: 60px;
  width: auto;
  margin: 0 auto 15px; /* 置中並空出間距 */
  object-fit: contain;
  flex-shrink: 0;
}

.card p {
  margin: auto 0;
  font-size: 20px;
}

.card h3 {
  margin: 10px 0;
  color: var(--primary);
}

/* --- footer.css --- */
/* Footer */
footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  border-top: 1px solid #2a2f3a;
}

/* --- grid.css --- */
/* --- 卡片等高關鍵設定 --- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  align-items: stretch; /* 讓同一列的項目等高 */
}

/* 讓 a 標籤也撐開，否則裡面的 card 無法繼承高度 */
.grid > a {
  display: flex;
  flex-direction: column;
}


/* --- reveal.css --- */
/* 滾動動畫 */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 1.2s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* --- tag.css --- */
/* Tags */
.tags { margin-top: 10px; }
.tag {
  display: inline-block;
  background: #333;
  padding: 5px 10px;
  margin: 4px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--muted);
}