* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0f;
  --surface: #14141f;
  --surface2: #1c1c2e;
  --border: #2a2a3e;
  --text: #e8e8f0;
  --text2: #9898b0;
  --accent: #7c5bf5;
  --accent2: #a78bfa;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== SPA Pages ===== */
.app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
}

.page {
  padding: 16px;
  padding-bottom: 60px;
}

.page.hidden {
  display: none;
}

/* ===== Home Page ===== */
.home-header {
  text-align: center;
  padding: 28px 0 20px;
}

.home-header h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 1px;
}

.subtitle {
  color: var(--text2);
  font-size: 13px;
  margin-top: 6px;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.sys-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 14px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.sys-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-color, var(--accent));
}

.sys-card:hover {
  border-color: var(--card-color, var(--accent));
  transform: translateY(-2px);
}

.sys-card:active {
  transform: scale(0.97);
}

.sys-card .card-emoji {
  font-size: 32px;
  display: block;
  margin-bottom: 8px;
}

.sys-card .card-label {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.sys-card .card-desc {
  font-size: 11px;
  color: var(--text2);
  line-height: 1.4;
}

.sys-card.card-full {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  padding: 16px 18px;
}

.sys-card.card-full .card-emoji {
  font-size: 36px;
  margin-bottom: 0;
  flex-shrink: 0;
}

/* ===== System Page ===== */
.sys-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
}

.btn-back {
  background: none;
  border: none;
  color: var(--accent2);
  font-size: 15px;
  cursor: pointer;
  padding: 6px 0;
  flex-shrink: 0;
}

.sys-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sys-icon {
  font-size: 24px;
}

.sys-name {
  font-size: 20px;
  font-weight: 700;
}

.sys-desc {
  color: var(--text2);
  font-size: 13px;
  margin-bottom: 16px;
}

/* ===== Input Section ===== */
.input-section {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
}

.form-group {
  margin-bottom: 14px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text2);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-row {
  display: flex;
  gap: 12px;
}

.flex-1 {
  flex: 1;
}

input, select {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
}

input:focus, select:focus {
  border-color: var(--accent);
}

input:disabled, select:disabled {
  opacity: 0.4;
}

select {
  cursor: pointer;
}

/* Date & Time Row */
.date-row, .time-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

.date-row select, .time-row select {
  flex: 1;
  min-width: 0;
}

.date-sep {
  color: var(--text2);
  font-size: 13px;
  flex-shrink: 0;
}

/* Checkbox - Custom Style */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text2);
  cursor: pointer;
  margin-top: 10px;
  user-select: none;
  padding: 8px 12px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.2s;
}

.checkbox-label:hover {
  border-color: var(--accent);
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.check-box {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
  font-size: 13px;
  color: transparent;
}

.checkbox-label input:checked ~ .check-box {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.checkbox-label input:checked ~ .check-text {
  color: var(--text);
}

/* Button */
.btn-primary {
  width: 100%;
  padding: 14px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 1px;
  margin-top: 16px;
}

.btn-primary:hover {
  background: var(--accent2);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary.loading {
  position: relative;
  color: transparent;
}

.btn-primary.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22px;
  height: 22px;
  margin: -11px 0 0 -11px;
  border: 3px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Results ===== */
.results-section {
  margin-top: 20px;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.results-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.btn-copy-all {
  padding: 8px 14px;
  background: var(--surface2);
  color: var(--accent2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-copy-all:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* Result Card */
.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.result-card:hover {
  border-color: var(--accent);
}

.result-card.highlight {
  border-color: var(--warning);
  border-width: 2px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
}

.card-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-icon {
  font-size: 20px;
}

.card-name {
  font-size: 15px;
  font-weight: 600;
}

.card-summary {
  font-size: 12px;
  color: var(--text2);
  max-width: 180px;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-arrow {
  color: var(--text2);
  transition: transform 0.2s;
  font-size: 12px;
  margin-left: 6px;
  flex-shrink: 0;
}

.result-card.open .card-arrow {
  transform: rotate(180deg);
}

.card-body {
  display: none;
  padding: 0 16px 16px;
}

.result-card.open .card-body {
  display: block;
}

.card-error {
  color: var(--danger);
  font-size: 13px;
  padding: 8px 0;
}

/* Prompt Text */
.prompt-area {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 300px;
  overflow-y: auto;
  font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
}

.btn-copy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  margin-top: 10px;
  padding: 10px;
  background: var(--surface2);
  color: var(--accent2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-copy:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.btn-copy.copied {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

/* Wuxing Visual */
.wuxing-bars {
  margin: 12px 0;
}

.wx-bar-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 13px;
}

.wx-label {
  width: 24px;
  text-align: center;
  font-weight: 600;
}

.wx-bar-track {
  flex: 1;
  height: 20px;
  background: var(--bg);
  border-radius: 4px;
  overflow: hidden;
}

.wx-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 6px;
  font-size: 11px;
  color: white;
  font-weight: 600;
  min-width: 30px;
}

.wx-bar-fill.wx-jin { background: linear-gradient(90deg, #d4a017, #f5d060); }
.wx-bar-fill.wx-mu { background: linear-gradient(90deg, #22a55a, #4ade80); }
.wx-bar-fill.wx-shui { background: linear-gradient(90deg, #2563eb, #60a5fa); }
.wx-bar-fill.wx-huo { background: linear-gradient(90deg, #dc2626, #f87171); }
.wx-bar-fill.wx-tu { background: linear-gradient(90deg, #a16207, #d4a017); }

.xiji-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0;
}

.xiji-tag {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}

.xiji-tag.xi {
  background: rgba(52, 211, 153, 0.15);
  color: var(--success);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.xiji-tag.ji {
  background: rgba(248, 113, 113, 0.15);
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.3);
}

.section-label {
  font-size: 12px;
  color: var(--text2);
  margin: 10px 0 4px;
  font-weight: 500;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--surface2);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  border: 1px solid var(--border);
  transition: transform 0.3s ease;
  z-index: 100;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* Responsive */
@media (min-width: 768px) {
  .app { max-width: 560px; }
  .home-header h1 { font-size: 30px; }
  .card-grid { grid-template-columns: 1fr 1fr 1fr; }
}