/* ==========================================================================
   Table of Contents (目錄)
   1. Design Tokens (變數設定) - 修改顏色請改這裡
   2. Reset & Base (基礎重置)
   3. Components (共用元件：按鈕、標題、Loading)
   4. Navbar (導覽列)
   5. Hero Section (關於我)
   6. Skills & Timeline (技能經歷)
   7. Portfolio (作品集)
   8. Services (接案服務 - 手風琴)
   9. Footer (頁尾)
   10. Animations (動畫效果)
   11. Responsive (RWD 手機版設定)
   ========================================================================== */

/* =========================================
   1. Design Tokens (變數設定)
   [說明] 這裡定義全站共用的顏色與數值，修改這裡即可改變全站風格
   ========================================= */
:root {
  /* --- 色票系統 --- */
  --color-bg: #eaefef; /* 網頁背景色 (淺灰) */
  --color-secondary: #bfc9d1; /* 次要色 (裝飾線條、邊框) */
  --color-primary: #25343f; /* 主題色 (深藍灰 - 用於文字、Footer) */
  --color-accent: #ff9b51; /* 強調色 (亮橘 - 用於按鈕、重點文字) */

  /* --- 功能性顏色 --- */
  --color-navbar-bg: rgba(37, 52, 63, 0.98); /* 導覽列背景 (半透明深色) */
  --text-main: #25343f; /* 主要文字顏色 */
  --text-light: #6c757d; /* 次要文字顏色 (灰色說明文字) */
  --text-nav: #eeeeee; /* 導覽列連結顏色 */
  --white: #ffffff; /* 純白色 */

  /* --- 尺寸設定 --- */
  --container-width: 1140px; /* 內容最大寬度 */
  --header-height: 70px; /* 導覽列高度 */

  /* --- 效果設定 --- */
  --shadow-sm: 0 4px 6px rgba(37, 52, 63, 0.1);
  --shadow-md: 0 10px 20px rgba(37, 52, 63, 0.15);
  --radius-md: 8px;
  --radius-lg: 16px;
  --transition: 0.3s ease; /* 通用動畫時間 */
}

/* =========================================
   2. Reset & Base (基礎重置)
   ========================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box; /* 讓 padding 不會撐大元素 */
}

html {
  scroll-behavior: smooth; /* 點擊連結時平滑捲動 */
}

body {
  font-family: "Segoe UI", "Microsoft JhengHei", sans-serif;
  background-color: var(--color-bg);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden; /* 防止水平卷軸出現 */
}

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

ul {
  list-style: none;
}

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

/* 通用容器：限制內容最大寬度並置中 */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0; /* 區塊上下的留白 */
}

.bg-light {
  background-color: rgba(255, 255, 255, 0.5); /* 半透明白色背景區塊 */
}

/* =========================================
   3. Components (共用元件)
   ========================================= */
/* 區塊標題樣式 */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  position: relative;
  display: inline-block;
}

/* 標題下方的橘色底線 */
.section-title::after {
  content: "";
  display: block;
  width: 50%;
  height: 3px;
  background-color: var(--color-accent);
  margin: 10px auto 0;
  border-radius: 2px;
}

.section-subtitle {
  color: var(--text-light);
}

/* 網格系統 (Grid System) */
.grid-2-col {
  display: grid;
  grid-template-columns: 1fr 1fr; /* 兩欄平分 */
  gap: 3rem;
}

.grid-3-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* 三欄平分 */
  gap: 2rem;
}

/* Loading 遮罩與動畫 */
.loader-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-primary);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.5s ease, visibility 0.5s;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--color-accent);
  animation: spin 1s ease-in-out infinite;
  margin: 0 auto 1rem;
}

.loader-text {
  color: var(--white);
  letter-spacing: 2px;
  font-weight: 300;
  animation: pulse 1.5s infinite;
}

.loader-hidden {
  opacity: 0;
  visibility: hidden;
}

/* =========================================
   4. Navbar (導覽列)
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--color-navbar-bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  transition: var(--transition);
}

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

.logo {
  color: var(--white);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.nav-list {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-nav);
  font-weight: 500;
  position: relative;
  padding: 5px 0;
  font-size: 1rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}

/* 連結下方的滑動橘線 */
.nav-link::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

.nav-link:hover::before {
  width: 100%;
}

/* 漢堡選單按鈕 (預設隱藏) */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--white);
  transition: 0.3s;
}

/* =========================================
   5. Hero Section (關於我)
   ========================================= */
.hero-section {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 100px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #111 100%);
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* 背景光暈效果 */
.hero-section::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(255, 155, 81, 0.1) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

.profile-img-wrapper {
  width: 180px;
  height: 180px;
  margin: 0 auto 2rem;
  border-radius: 50%;
  border: 4px solid var(--color-accent);
  padding: 5px;
  overflow: hidden;
}

.profile-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-secondary);
  margin-bottom: 2rem;
}

.hero-desc {
  max-width: 600px;
  margin: 0 auto 2rem;
  color: #d1d9e0;
}

.accent-text {
  color: var(--color-accent);
  font-weight: bold;
}

/* 社群 Icon */
.social-icons a {
  color: var(--color-secondary);
  font-size: 1.5rem;
  margin: 0 10px;
}

.social-icons a:hover {
  color: var(--color-accent);
  transform: scale(1.2);
  display: inline-block;
}

/* =========================================
   6. Skills & Timeline (技能經歷)
   ========================================= */
.skills-wrapper,
.timeline-wrapper {
  background: var(--white);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.column-title {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-bg);
  padding-bottom: 0.5rem;
}

.skill-group {
  margin-bottom: 1.5rem;
}

.skill-group h4 {
  font-size: 1rem;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 技能標籤互動效果：放大+變深 */
.tags span {
  padding: 6px 14px;
  background-color: var(--color-bg);
  color: var(--color-primary);
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  display: inline-block;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.tags span:hover {
  transform: scale(1.1);
  background-color: #d1d9e0;
  cursor: default;
}

/* 時間軸樣式 */
.timeline {
  position: relative;
  padding-left: 20px;
  border-left: 2px solid var(--color-secondary);
}

.timeline-item {
  margin-bottom: 2rem;
  position: relative;
}

/* 時間軸上的圓點 */
.timeline-item::before {
  content: "";
  position: absolute;
  left: -27.5px;
  top: 5px;
  width: 11px;
  height: 11px;
  background: var(--color-accent);
  border-radius: 100%;
  border: 2px solid var(--white);
}

.timeline-date {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: bold;
  display: block;
  margin-bottom: 5px;
}

/* =========================================
   7. Portfolio (作品集)
   ========================================= */
.portfolio-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.portfolio-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-md);
}

.card-image {
  height: 200px;
  background-color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden; /* 確保縮放時圖片不會超出邊框 */
  border-radius: 8px 8px 0 0; /* 如果卡片有圓角 */
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover; 
  transition: transform 0.3s ease; /* 為互動做準備 */
}

.card-content {
  padding: 1.5rem;
  flex-grow: 1;
}

.card-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.card-tags {
  margin-top: 10px;
}

.card-tags small {
  display: inline-block;
  background: var(--color-bg);
  padding: 3px 8px;
  border-radius: 4px;
  margin-right: 5px;
  margin-top: 8px;
  color: var(--text-light);
}

.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-bg);
  background-color: #fafafa;
}

/* 卡片連結互動效果：只放大，不變色 */
.card-link {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: transform 0.2s ease, gap 0.2s ease;
}

.card-link:hover {
  gap: 10px;
  transform: scale(1.05);
}

/* =========================================
   8. Services (接案服務 - 手風琴)
   ========================================= */
.accordion-item {
  background: var(--white);
  margin-bottom: 1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  padding: 1.2rem;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: background 0.3s;
}

.accordion-header:hover {
  background-color: #f8f9fa;
}

.accordion-header.active .icon {
  transform: rotate(180deg); /* 箭頭旋轉動畫 */
  color: var(--color-accent);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out;
}

.content-inner {
  padding: 1.5rem;
  border-top: 1px solid var(--color-bg);
}

.content-inner p {
  margin-bottom: 0.8rem;
}

.price-tag {
  color: var(--color-accent);
  font-weight: bold;
  font-size: 1.1rem;
  margin: 0 5px;
}

.contact-hint {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-top: 1rem;
  border-top: 1px dashed var(--color-secondary);
  padding-top: 0.5rem;
}

.contact-hint a{
  text-decoration:none
}

.text-link {
  color: var(--color-primary);
  text-decoration: underline;
}

.text-link:hover {
  color: var(--color-accent);
}

/* =========================================
   9. Footer (頁尾)
   ========================================= */
.footer {
  background-color: var(--color-primary);
  color: var(--color-secondary);
  text-align: center;
  padding: 2rem 0;
  margin-top: 0; /* 修正：無上邊距，確保緊貼接案區塊 */
}

/* =========================================
   10. Animations (動畫效果)
   ========================================= */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.visible {
  opacity: 1;
  transform: none;
}

/* =========================================
   11. Responsive (RWD 手機版設定)
   ========================================= */
@media (max-width: 768px) {
  /* 轉為單欄排版 */
  .grid-2-col,
  .grid-3-col {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* 顯示漢堡按鈕 */
  .hamburger {
    display: block;
    z-index: 1001;
  }

  /* 漢堡變叉叉動畫 */
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* 手機版下拉選單 */
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-navbar-bg);
    flex-direction: column;
    align-items: center;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out, box-shadow 0.3s ease;
    box-shadow: none;
    padding: 0;
  }

  .nav-menu.active {
    max-height: 500px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    padding-bottom: 1.5rem;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .nav-list li {
    width: 100%;
    text-align: center;
  }

  .nav-link {
    display: block;
    padding: 1rem 0;
    font-size: 1.1rem;
    color: var(--white);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-list li:last-child .nav-link {
    border-bottom: none;
  }

  /* 文字尺寸調整 */
  .hero-title {
    font-size: 2.5rem;
  }
}