/* ================================================
   溪流環境資訊平台 — 主樣式表
   設計風格：深色系 + 水藍色調 + 現代玻璃擬態
   ================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;600;700;900&family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS 設計 Token ── */
:root {
  /* 主色系 */
  --primary:       #0077b6;
  --primary-light: #00b4d8;
  --primary-dark:  #023e8a;
  --accent:        #48cae4;
  --accent-2:      #90e0ef;

  /* 狀態色 */
  --success:  #06d6a0;
  --warning:  #ffd166;
  --danger:   #ef476f;
  --info:     #74b9ff;

  /* 背景層次 */
  --bg-base:    #050d1a;
  --bg-surface: #0a1628;
  --bg-card:    #0f2040;
  --bg-hover:   #162d52;

  /* 玻璃效果 */
  --glass-bg:     color-mix(in srgb, var(--bg-card) 60%, transparent);
  --glass-border: rgba(0, 180, 216, 0.2);
  --glass-blur:   blur(16px);

  /* 文字色 */
  --text-primary:   #e8f4fd;
  --text-secondary: #94b3c7;
  --text-muted:     #4a7a99;

  /* 漸層 */
  /* 跟著主題顏色變（版面設定、我的版面設定換顏色時，按鈕、標題區的漸層也會一起換） */
  --gradient-primary: linear-gradient(135deg, color-mix(in srgb, var(--primary) 55%, #021433) 0%, var(--primary) 50%, var(--primary-light) 100%);
  --gradient-card:    linear-gradient(145deg, var(--bg-card) 0%, var(--bg-hover) 100%);
  --gradient-hero:    radial-gradient(ellipse at 30% 40%, color-mix(in srgb, var(--primary) 30%, transparent) 0%, transparent 60%),
                      radial-gradient(ellipse at 70% 60%, color-mix(in srgb, var(--primary-light) 20%, transparent) 0%, transparent 50%),
                      linear-gradient(180deg, var(--bg-base) 0%, color-mix(in srgb, var(--bg-base) 60%, #000) 100%);

  /* 圓角 */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* 陰影 */
  --shadow-sm:   0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md:   0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg:   0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(0, 180, 216, 0.3);

  /* 動畫 */
  --transition-fast: 0.15s ease;
  --transition-mid:  0.3s ease;
  --transition-slow: 0.5s ease;

  /* 字體 */
  --font-tc: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  --font-en: 'Inter', sans-serif;

  /* 導覽列高度 */
  --navbar-height: 70px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-tc);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── 捲軸樣式 ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-light); }

/* ── 名字旁的頭銜（全站共用） ── */
.title-badge {
  display: inline-block; margin-left: 0.3rem; padding: 0.05rem 0.45rem; border-radius: 999px;
  font-size: 0.68rem; font-weight: 700; white-space: nowrap; vertical-align: middle;
  color: #ffe9a8; background: rgba(255, 209, 102, 0.12); border: 1px solid rgba(255, 209, 102, 0.35);
}
/* 初代溪友：金色漸層、微微發光 */
.title-badge.pioneer {
  color: #2a1a00; border-color: #f5d77a;
  background: linear-gradient(120deg, #e0b84c, #fff1b8 45%, #e0b84c 70%, #c99a2e);
  background-size: 200% 100%; box-shadow: 0 0 8px rgba(245, 215, 122, 0.55);
  animation: pioneer-shine 4s ease-in-out infinite;
}
@keyframes pioneer-shine { 0%, 100% { background-position: 0% 0; } 50% { background-position: 100% 0; } }
/* 擁有者：彩虹極光一直流動、強發光 */
.title-badge.role.owner {
  color: #1b1030; border-color: rgba(255, 255, 255, 0.7); text-shadow: 0 0 2px rgba(255, 255, 255, 0.6);
  background: linear-gradient(90deg, #ff6b6b, #ffa94d, #ffd43b, #69db7c, #4dabf7, #b197fc, #ff6b6b);
  background-size: 300% 100%; animation: owner-aurora 6s linear infinite;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.45), 0 0 16px rgba(177, 151, 252, 0.6);
}
@keyframes owner-aurora { from { background-position: 0% 0; } to { background-position: 300% 0; } }
/* 初始開發團隊：電光藍紫、發光 */
.title-badge.role.founder {
  color: #fff; border-color: #a78bfa;
  background: linear-gradient(120deg, #4f46e5, #a78bfa 50%, #4f46e5); background-size: 200% 100%;
  animation: pioneer-shine 4s ease-in-out infinite; box-shadow: 0 0 9px rgba(167, 139, 250, 0.6);
}
/* 管理員：海水藍、微光 */
.title-badge.role.admin {
  color: #fff; border-color: #7dd3fc; text-shadow: 0 1px 2px rgba(3, 105, 161, 0.8);
  background: linear-gradient(120deg, #0369a1, #38bdf8 55%, #0369a1); box-shadow: 0 0 5px rgba(125, 211, 252, 0.45);
}
@media (prefers-reduced-motion: reduce) { .title-badge.pioneer, .title-badge.role.owner, .title-badge.role.founder { animation: none; } }
.prefs-swatch.pioneer-swatch:not(.unlocked) { opacity: 0.55; }
.title-badge.negative { color: #ffb4c2; background: rgba(239, 71, 111, 0.12); border-color: rgba(239, 71, 111, 0.4); }
.title-badge.role {
  color: #e8f4fd; background: color-mix(in srgb, var(--primary-light) 18%, transparent);
  border-color: color-mix(in srgb, var(--primary-light) 50%, transparent);
}

/* ── 連結 ── */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--accent-2); }

/* ================================================
   導覽列
   ================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background: color-mix(in srgb, var(--bg-base) 85%, transparent);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1100;  /* 比地圖的按鈕（Leaflet 用 1000）高，往下捲時地圖按鈕才不會蓋到選單 */
  display: flex;
  align-items: center;
  padding: 0 2rem;
  gap: 2rem;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary) !important;
  text-decoration: none;
  white-space: nowrap;
}

.navbar-brand .logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: var(--shadow-glow);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  min-width: 0;            /* 放不下時可以縮，改成左右捲動 */
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--primary-light) 45%, transparent) transparent;
}
.navbar-nav::-webkit-scrollbar { height: 5px; }
.navbar-nav::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--primary-light) 45%, transparent); border-radius: 3px; }
.navbar-nav::-webkit-scrollbar-track { background: transparent; }
/* 還有沒看到的選項時，邊緣淡出提示可以捲 */
.navbar-nav.fade-right { -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 40px), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 40px), transparent); }
.navbar-nav.fade-left { -webkit-mask-image: linear-gradient(90deg, transparent, #000 40px); mask-image: linear-gradient(90deg, transparent, #000 40px); }
.navbar-nav.fade-left.fade-right { -webkit-mask-image: linear-gradient(90deg, transparent, #000 40px, #000 calc(100% - 40px), transparent); mask-image: linear-gradient(90deg, transparent, #000 40px, #000 calc(100% - 40px), transparent); }
.nav-item { flex-shrink: 0; }

/* 選單兩側的捲動箭頭（只有放不下時出現） */
.nav-arrow {
  flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%; cursor: pointer; padding: 0;
  border: 1px solid var(--glass-border); background: rgba(255,255,255,0.05); color: var(--text-primary);
  font-size: 1.2rem; line-height: 1; display: flex; align-items: center; justify-content: center;
}
.nav-arrow[hidden] { display: none; }
.nav-arrow:hover:not(:disabled) { border-color: var(--primary-light); color: var(--accent); }
.nav-arrow:disabled { opacity: 0.3; cursor: default; }

.nav-item .nav-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-item .nav-link:hover,
.nav-item .nav-link.active {
  background: rgba(0, 180, 216, 0.15);
  color: var(--accent);
}

.nav-item .nav-link .nav-icon { font-size: 1rem; }

.navbar-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

/* ── 漢堡選單（手機用） ── */
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  margin-left: auto;
}

/* ================================================
   主要內容區域
   ================================================ */
.main-content {
  padding-top: var(--navbar-height);
  min-height: 100vh;
}

/* ── 頁面標題橫幅 ── */
.page-hero {
  background: var(--gradient-hero);
  padding: 4rem 2rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(0, 180, 216, 0.08) 0%, transparent 60%);
  animation: hero-rotate 20s linear infinite;
}

@keyframes hero-rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.page-hero h1 {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 900;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 60%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.75rem;
  position: relative;
}

.page-hero p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

/* ── 容器 ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 3rem 0;
}

/* ================================================
   卡片系統
   ================================================ */
.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: all var(--transition-mid);
  overflow: hidden;
}

.card:hover {
  border-color: rgba(0, 180, 216, 0.4);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-body { padding: 1.5rem; }

.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.1);
}

/* ── 數據卡片 ── */
.data-card {
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all var(--transition-mid);
}

.data-card:hover {
  border-color: var(--primary-light);
  box-shadow: 0 0 20px rgba(0, 180, 216, 0.2);
}

.data-card .data-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.data-card .data-value {
  font-family: var(--font-en);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.data-card .data-unit {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-left: 0.25rem;
}

/* ================================================
   按鈕系統
   ================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-tc);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  outline: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(0, 119, 182, 0.4);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 119, 182, 0.6);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-outline:hover {
  background: rgba(0, 180, 216, 0.15);
  color: var(--accent);
}

.btn-danger {
  background: linear-gradient(135deg, #c62828, #ef476f);
  color: white;
}

.btn-success {
  background: linear-gradient(135deg, #00897b, #06d6a0);
  color: white;
}

.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.8rem; }
.btn-lg { padding: 0.9rem 2rem; font-size: 1rem; }

/* ================================================
   狀態徽章
   ================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.7rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-normal  { background: rgba(6, 214, 160, 0.15);  color: var(--success); border: 1px solid rgba(6, 214, 160, 0.3); }
.badge-warning { background: rgba(255, 209, 102, 0.15); color: var(--warning); border: 1px solid rgba(255, 209, 102, 0.3); }
.badge-danger  { background: rgba(239, 71, 111, 0.15);  color: var(--danger);  border: 1px solid rgba(239, 71, 111, 0.3); }
.badge-info    { background: rgba(116, 185, 255, 0.15); color: var(--info);    border: 1px solid rgba(116, 185, 255, 0.3); }

/* ================================================
   網格系統
   ================================================ */
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* ================================================
   表單元素
   ================================================ */
.form-group { margin-bottom: 1.25rem; }

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-control,
.form-select {
  width: 100%;
  background: color-mix(in srgb, var(--bg-surface) 80%, transparent);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.65rem 1rem;
  font-family: var(--font-tc);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.15);
}

.form-control::placeholder { color: var(--text-muted); }

textarea.form-control { resize: vertical; min-height: 100px; }
.form-control[hidden], .form-select[hidden] { display: none; }

/* ================================================
   進度條
   ================================================ */
.progress-bar-wrap {
  background: rgba(255,255,255,0.08);
  border-radius: 10px;
  overflow: hidden;
  height: 8px;
}

.progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 10px;
  transition: width 0.5s ease;
}

/* ================================================
   頁尾
   ================================================ */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--glass-border);
  padding: 2.5rem 2rem;
  text-align: center;
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.footer p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ================================================
   動畫工具類別
   ================================================ */
.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.slide-up {
  animation: slideUp 0.5s ease forwards;
}

.float-anim {
  animation: float 3s ease-in-out infinite;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

/* ── 漣漪水波動畫 ── */
.ripple-container {
  position: relative;
  overflow: hidden;
}

.ripple-container::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
  animation: ripple-scan 3s linear infinite;
}

@keyframes ripple-scan {
  from { transform: translateX(-100%); }
  to   { transform: translateX(100%); }
}

/* ── 粒子背景 ── */
.particles-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(0, 180, 216, 0.15);
  animation: particle-float linear infinite;
}

@keyframes particle-float {
  from { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  to   { transform: translateY(-10vh) rotate(720deg); opacity: 0; }
}

/* ── 工具類別 ── */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-primary-c { color: var(--primary-light); }
.text-accent    { color: var(--accent); }
.text-success   { color: var(--success); }
.text-warning   { color: var(--warning); }
.text-danger    { color: var(--danger); }
.text-muted-c   { color: var(--text-muted); }
.font-mono      { font-family: var(--font-en); }

.flex          { display: flex; }
.flex-center   { display: flex; align-items: center; justify-content: center; }
.flex-between  { display: flex; align-items: center; justify-content: space-between; }
.flex-gap-1    { gap: 0.5rem; }
.flex-gap-2    { gap: 1rem; }
.flex-wrap     { flex-wrap: wrap; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.p-2  { padding: 1rem; }
.p-3  { padding: 1.5rem; }

.divider {
  height: 1px;
  background: var(--glass-border);
  margin: 1.5rem 0;
}

/* ── 量表（Gauge）── */
.gauge-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.gauge-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

/* ── 通用彈窗 Modal ── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 10000; padding: 1rem;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease;
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  max-width: 560px; width: 100%;
  max-height: 90vh; overflow-y: auto;
  transform: scale(0.95);
  transition: transform 0.25s ease;
  box-shadow: var(--shadow-lg);
}
.modal-overlay.open .modal-box { transform: scale(1); }

/* ── 通用通知 Toast ── */
.toast {
  position: fixed; bottom: 2rem; right: 2rem;
  background: var(--success); color: white;
  padding: 0.75rem 1.25rem; border-radius: 10px;
  font-size: 0.875rem; font-weight: 600;
  box-shadow: var(--shadow-md);
  transform: translateY(100px); opacity: 0;
  transition: all 0.35s ease;
  z-index: 99999;
}
.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ================================================
   響應式設計
   ================================================ */
/* 導覽列項目多：中等寬度先縮小間距；電腦版放不下時左右捲動，手機才收進 ☰ 選單 */
@media (max-width: 2100px) {
  .navbar { gap: 0.6rem; padding: 0 1.25rem; }
  .navbar-nav { gap: 0; }
  .nav-item .nav-link { padding: 0.5rem 0.55rem; gap: 0.3rem; }
  .navbar-status { display: none !important; }
}

@media (max-width: 768px) {
  .nav-arrow { display: none !important; }
  .navbar-nav {
    overflow-x: visible;
    -webkit-mask-image: none !important; mask-image: none !important;
    display: none;
    position: absolute;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background: color-mix(in srgb, var(--bg-base) 97%, transparent);
    border-bottom: 1px solid var(--glass-border);
    flex-direction: column;
    padding: 1rem;
    gap: 0.5rem;
  }
  .navbar-nav.open { display: flex; }
  .navbar-toggle { display: block; }
}

@media (max-width: 768px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr) !important; }  /* 數字卡片兩個一排，不要每個佔一整行 */
  .edu-2col { grid-template-columns: 1fr !important; }
  .section { padding-top: 2.5rem; padding-bottom: 2.5rem; }
  .btn-sm { min-height: 36px; }                                   /* 手指比較好按 */
  .modal-overlay { padding: 0.5rem; align-items: flex-end; }      /* 視窗從下方滑出，像手機 App */
  .modal-box { max-height: 92vh; border-radius: var(--radius-lg) var(--radius-lg) 0.75rem 0.75rem; }
  .toast { left: 1rem; right: 1rem; bottom: 1rem; text-align: center; }
  input, select, textarea { font-size: 16px !important; }         /* iPhone 輸入框小於 16px 會自動放大畫面 */
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .page-hero { padding: 3rem 1rem 2rem; }
}

@media (max-width: 480px) {
  /* 原本手機上整體縮小成 14px，很多字只剩 10px 看不清楚；改回 15px */
  :root { font-size: 15px; }
  .navbar { gap: 0.5rem; padding: 0 0.75rem; }
  .navbar-brand > span { display: none; }  /* 手機上只留圖示，讓出空間給登入按鈕 */
  .container { padding: 0 1rem; }
  .card-body { padding: 1rem; }
}

/* 選照片的元件（static/js/image-picker.js） */
.image-picker { display:flex; gap:0.5rem; flex-wrap:wrap; }
.picker-item, .picker-add {
  position:relative; width:84px; height:84px; border-radius:10px; overflow:hidden;
  border:1px dashed var(--glass-border); background:rgba(255,255,255,0.03);
}
.picker-item img { width:100%; height:100%; object-fit:cover; }
.picker-item .picker-remove {
  position:absolute; top:4px; right:4px; width:22px; height:22px; border-radius:50%; border:none; cursor:pointer;
  background:rgba(0,0,0,0.65); color:#fff; font-size:0.75rem; line-height:22px; padding:0;
}
.picker-item.uploading::after {
  content:"上傳中…"; position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  background:rgba(0,0,0,0.55); color:#fff; font-size:0.72rem;
}
.picker-add {
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px;
  color:var(--text-muted); font-size:0.72rem; cursor:pointer;
}
.picker-add span { font-size:1.4rem; }
.picker-add:hover { border-color:var(--primary-light); color:var(--primary-light); }
.picker-hint { font-size:0.72rem; color:var(--text-muted); margin-top:0.35rem; }

/* 免責聲明的短提醒（水質監測、社群預警、Q&A 問答、AI 小幫手） */
.disclaimer-note {
  font-size: 0.78rem; line-height: 1.6; color: var(--text-muted); padding: 0.55rem 0.8rem; border-radius: 10px;
  background: rgba(255,255,255,0.03); border: 1px solid var(--glass-border); margin-bottom: 1rem;
}
.disclaimer-note a { color: var(--primary-light); }

/* 地圖：輸入經緯度定位（static/js/map-coords.js） */
.coord-input { margin: 0.5rem 0; }
.coord-row { display: flex; gap: 0.4rem; }
.coord-row input {
  flex: 1; min-width: 0; padding: 0.45rem 0.7rem; border-radius: 8px; font-family: inherit; font-size: 0.85rem;
  border: 1px solid var(--glass-border); background: var(--bg-card); color: var(--text-primary);
}
.coord-row input:focus { outline: none; border-color: var(--primary-light); }
.coord-row .btn { white-space: nowrap; }
.coord-msg { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; min-height: 1em; }
.coord-msg.bad { color: var(--danger); }