/* ── 原有樣式保持不變 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --purple: #a959ff;
  --purple-dark: #8e55cb;
  --purple-mid: #773db5;
  --purple-light: #eddbff;
  --purple-bg: #faf8ff;
  --purple-border: #edd8f6;
  --purple-tag-bg: #fbf7ff;
  --purple-tag-border: #e9d5ff;
  --cert-bg: #f6f0ff;
  --cert-border: #b47de6;
  --cert-section-bg: #ebe5fe;
  --page-grad: linear-gradient(160deg, #dbf4ff 0%, #e1d2ff 50%, #fee3ff 100%);
  --font-sans: 'Noto Sans TC', sans-serif;
  --font-serif: 'Noto Serif TC', serif;
  --app-max: 480px;
}

html { height: 100%; }
body { min-height: 100%; background: #e8e0f0; font-family: var(--font-sans); -webkit-font-smoothing: antialiased; }

.app { width: 100%; max-width: var(--app-max); margin: 0 auto; min-height: 100vh; background: var(--page-grad); position: relative; box-shadow: 0 0 40px rgba(120,60,180,0.12); }

/* ── NAVBAR 修改部分 ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  height: 53px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid #efefef;
}

.navbar-left {
  display: flex;
  align-items: center;
}

.navbar-logo {
  height: 32px;
  width: auto;
  object-fit: contain;
  margin-right: 8px;
}

.navbar-title {
  background: linear-gradient(90deg, #a959ff, #ff54da);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
}

/* 漢堡選單組件 */
.menu-container { position: relative; display: flex; align-items: center; }
.menu-toggle { background: none; border: none; cursor: pointer; padding: 8px; z-index: 102; display: flex; align-items: center; justify-content: center; }
.hamburger { width: 20px; height: 14px; position: relative; display: flex; flex-direction: column; justify-content: space-between; }
.hamburger span { display: block; width: 100%; height: 2px; background: var(--purple); border-radius: 2px; transition: all 0.3s ease-in-out; }

.menu-toggle.active .hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.active .hamburger span:nth-child(2) { opacity: 0; }
.menu-toggle.active .hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.dropdown-menu {
  position: absolute;
  top: 45px;
  right: 0;
  width: 160px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--purple-border);
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(120, 60, 180, 0.15);
  padding: 8px;
  display: none;
  flex-direction: column;
  gap: 4px;
  z-index: 101;
  transform-origin: top right;
  animation: menuFadeIn 0.2s ease-out;
}
.dropdown-menu.active { display: flex; }
@keyframes menuFadeIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }

.menu-item {
  text-decoration: none;
  color: var(--purple-dark);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 10px;
  transition: background 0.2s;
}
.menu-item:hover { background: var(--purple-light); color: var(--purple-mid); }

/* ── 其餘樣式保持不變 ── */
.view { display: none; width: 100%; padding-bottom: 48px; }
.view.active { display: block; }
.hero { padding: 20px 16px 8px; text-align: center; }
.hero-title { font-weight: 900; font-size: clamp(22px, 6vw, 28px); background: linear-gradient(90deg, #a959ff, #ff51d9); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 6px; }
.hero-sub { font-size: 12px; color: #555; margin-bottom: 14px; }
.bubbles { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; padding: 0 8px; }
.bubble { font-size: 13px; padding: 8px 14px; border-radius: 8px; box-shadow: 0 4px 4px rgba(0,0,0,0.05); }
.bubble-1 { background: rgba(255,255,255,0.9); transform: rotate(-3deg); color: #3da8d0; }
.bubble-2 { background: rgba(255,255,255,0.6); backdrop-filter: blur(2px); transform: rotate(2deg); color: #4a6ae0; }
.form-area { padding: 12px 16px 0; display: flex; flex-direction: column; gap: 14px; }
.card { background: white; border-radius: 20px; padding: 20px 18px; display: flex; flex-direction: column; gap: 16px; box-shadow: 0 4px 8px rgba(79,86,118,0.08); }
.card-heading { font-weight: 700; font-size: 16px; color: var(--purple); border-left: 5px solid var(--purple); padding-left: 12px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field-label { font-size: 13px; font-weight: 500; color: var(--purple-dark); }
.field-input, .field-textarea { width: 100%; background: var(--purple-bg); border: 1px solid var(--purple-border); border-radius: 16px; padding: 15px 22px; font-size: 16px; outline: none; transition: border-color 0.2s; }
.field-input.error { border-color: #ff4d4d; }
.datetime-row { display: flex; align-items: center; background: var(--purple-bg); border: 1px solid var(--purple-border); border-radius: 16px; height: 54px; overflow: hidden; }
.datetime-display { flex: 1; padding-left: 22px; border: none; background: transparent; font-size: 16px; outline: none; }
.btn-reset { padding: 0 18px; background: none; border: none; font-weight: 700; color: var(--purple-dark); cursor: pointer; }
.upload-area { height: 113px; background: var(--purple-bg); border: 1px dashed var(--purple-border); border-radius: 16px; cursor: pointer; position: relative; overflow: hidden; }
.upload-placeholder { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--purple-dark); }
.upload-preview { width: 100%; height: 100%; object-fit: cover; }
.tags { display: flex; flex-wrap: wrap; gap: 8px 6px; }
.tag { background: var(--purple-tag-bg); border: 1px solid var(--purple-tag-border); border-radius: 35px; padding: 6px 14px; font-size: 13px; color: var(--purple-mid); cursor: pointer; }
.tag.selected { background: var(--purple-dark); border-color: var(--purple-dark); color: white; }
.btn-generate { width: 100%; padding: 18px; background: linear-gradient(90deg, #8e55cb, #ce5ed6, #ff65de); border: none; border-radius: 16px; color: white; font-size: 16px; letter-spacing: 3px; cursor: pointer; }
.cert-render-offscreen { position: absolute; left: -9999px; width: 371px; }
.cert { background: #f6f0ff; border: 1px solid var(--cert-border); padding: 20px 16px; font-family: var(--font-serif); position: relative; }
.cert-no { position: absolute; top: 12px; right: 14px; font-size: 10px; }
.cert-title { font-weight: 900; font-size: 26px; color: var(--purple); text-align: center; letter-spacing: 5px; margin-bottom: 14px; }
.cert-section { background: var(--cert-section-bg); border-radius: 6px; padding: 10px 14px; margin-bottom: 10px; position: relative; }
.cert-avatar, .cert-avatar-empty { width: 66px; height: 66px; border-radius: 50%; }
.cert-avatar-empty { background: #d8c7f0; }
.cert-name { font-size: 20px; font-weight: 700; }
.cert-group-img, .cert-group-empty { width: 66px; height: 66px; border-radius: 50%; float: right; }
.cert-x-mark { position: absolute; right: 14px; top: 10px; font-size: 36px; color: rgba(200,40,40,0.8); }
.cert-idol { font-size: 18px; font-weight: 900; text-align: center; margin: 8px 0; }
.cert-stamp { position: absolute; bottom: 8px; right: 10px; width: 88px; height: 88px; border: 3px solid #ff6d6d; border-radius: 50%; display: flex; align-items: center; justify-content: center; transform: rotate(-6deg); }
.stamp-text { font-weight: 900; color: #ff6d6d; text-align: center; font-size: 20px; }
.cert-display-img { width: 100%; border-radius: 6px; }
.result-actions { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 16px; }
.btn-download { width: 100%; max-width: 260px; padding: 15px; background: white; border: 1px solid var(--purple-border); border-radius: 16px; color: var(--purple-mid); cursor: pointer; }
.btn-back { background: none; border: none; color: var(--purple-dark); cursor: pointer; text-decoration: underline; }

/* RWD 略 */
@media (min-width: 600px) {
  body { padding: 32px 0; }
  .app { border-radius: 24px; overflow: hidden; }
}