/* ============================================================
   style.css — 簡約溫暖風格
   色彩：暖白底 + 四色系卡片（珊瑚 / 薄荷 / 天空藍 / 薰衣草）
   字體：標題用圓潤的 Quicksand，內文用 Noto Sans TC
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Quicksand:wght@500;600;700&family=Noto+Sans+TC:wght@400;500;700&display=swap");

:root {
  --color-bg: #faf6f0;
  --color-surface: #ffffff;
  --color-text: #2b2621;
  --color-text-secondary: #8a8078;
  --color-accent: #c1443c;
  --color-border: #ece3d8;

  --card-computer: #f7d9d3;
  --card-computer-icon: #c1443c;
  --card-study: #d9eae1;
  --card-study-icon: #3f7a5f;
  --card-discussion: #d6e4f0;
  --card-discussion-icon: #3d6a96;
  --card-counseling: #e5dcf0;
  --card-counseling-icon: #6b4f96;

  --radius-lg: 20px;
  --radius-md: 12px;
  --shadow-soft: 0 4px 16px rgba(43, 38, 33, 0.06);
  --shadow-hover: 0 10px 28px rgba(43, 38, 33, 0.1);

  --font-heading: "Quicksand", "Noto Sans TC", sans-serif;
  --font-body: "Noto Sans TC", -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- Header ---------- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  animation: fadeDown 0.5s ease both;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-badge {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pill-btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.pill-btn:hover {
  box-shadow: var(--shadow-soft);
  transform: translateY(-1px);
}

/* ---------- Main / Hero ---------- */

.main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 24px 64px;
  text-align: center;
}

.unit-name {
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 500;
  margin: 24px 0 6px;
  animation: fadeUp 0.5s ease 0.05s both;
}

.heading {
  font-family: var(--font-heading);
  font-size: 34px;
  font-weight: 700;
  margin: 0 0 10px;
  animation: fadeUp 0.5s ease 0.1s both;
}

.subheading {
  color: var(--color-text-secondary);
  font-size: 15px;
  margin: 0 0 40px;
  animation: fadeUp 0.5s ease 0.15s both;
}

/* ---------- Category grid ---------- */

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  text-align: left;
}

@media (max-width: 560px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  border: none;
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 40px;
  font-family: var(--font-body);
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  animation: fadeUp 0.5s ease both;
}

.card:nth-child(1) { animation-delay: 0.2s; }
.card:nth-child(2) { animation-delay: 0.26s; }
.card:nth-child(3) { animation-delay: 0.32s; }
.card:nth-child(4) { animation-delay: 0.38s; }

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.card:active {
  transform: translateY(-1px) scale(0.98);
}

.card.card-computer   { background: var(--card-computer); }
.card.card-study      { background: var(--card-study); }
.card.card-discussion { background: var(--card-discussion); }
.card.card-counseling { background: var(--card-counseling); }

.card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card-computer   .card-icon { color: var(--card-computer-icon); }
.card-study      .card-icon { color: var(--card-study-icon); }
.card-discussion .card-icon { color: var(--card-discussion-icon); }
.card-counseling .card-icon { color: var(--card-counseling-icon); }

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-label {
  font-size: 19px;
  font-weight: 700;
  font-family: var(--font-heading);
}

.card-arrow {
  transition: transform 0.18s ease;
}
.card:hover .card-arrow {
  transform: translateX(4px);
}

.card.is-loading {
  opacity: 0.6;
  pointer-events: none;
}

.site-footer {
  color: var(--color-text-secondary);
  font-size: 12.5px;
  margin-top: 48px;
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 20px);
  background: var(--color-text);
  color: #fff;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.toast.error {
  background: var(--color-accent);
}

/* ---------- Admin page ---------- */

.admin-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 12px 24px 64px;
}

.admin-title {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  margin: 8px 0 20px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.tab-btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 14px;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all 0.15s ease;
}

.tab-btn.active {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
}

.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 8px;
}

.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-soft);
  animation: fadeUp 0.35s ease both;
}

.stat-card-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.stat-card-value {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
}

.log-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.log-table th, .log-table td {
  text-align: left;
  padding: 10px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--color-border);
}

.log-table th {
  color: var(--color-text-secondary);
  font-weight: 500;
  background: #fbf8f4;
}

.log-table tr:last-child td {
  border-bottom: none;
}

.empty-state {
  color: var(--color-text-secondary);
  font-size: 14px;
  padding: 32px 0;
  text-align: center;
}

.download-row {
  margin-top: 24px;
  display: flex;
  justify-content: flex-end;
}

/* ---------- Modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(43, 38, 33, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 10;
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 300px;
  box-shadow: var(--shadow-hover);
  transform: translateY(8px);
  transition: transform 0.2s ease;
}

.modal-overlay.show .modal-box {
  transform: translateY(0);
}

.modal-box h3 {
  font-family: var(--font-heading);
  margin: 0 0 16px;
  font-size: 17px;
}

.modal-box input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 8px;
  font-family: var(--font-body);
}

.modal-error {
  color: var(--color-accent);
  font-size: 12.5px;
  min-height: 16px;
  margin-bottom: 8px;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.btn-primary {
  background: var(--color-text);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 13px;
  cursor: pointer;
}

.download-format-row {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

/* ---------- Animations ---------- */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}