:root {
  --bg: #FCF9F4;
  --bg-card: #FFFFFF;
  --bg-warm: #F5EDE6;
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --accent: #E8C4A0;
  --accent-light: #FFF6ED;
  --accent-peach: #FFE8E0;
  --border: #F0E8DF;
  --danger: #E74C3C;
  --success: #27AE60;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --nav-height: 68px;
}

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

html,
body,
#root {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
}

input,
select,
textarea {
  font-family: inherit;
}

::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.app-shell {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 500px;
  margin: 0 auto;
}

.app-content {
  flex: 1;
  overflow-y: auto;
  padding: 8px 20px 20px;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0 16px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.page-title {
  font-size: 26px;
  font-weight: 700;
}

/* Bottom Nav */
.bottom-nav {
  display: flex;
  height: var(--nav-height);
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 6px 8px;
  padding-bottom: calc(6px + env(safe-area-inset-bottom));
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: none;
  color: var(--text-tertiary);
  font-size: 11px;
  transition: color 0.2s;
}

.nav-item.active {
  color: var(--text-primary);
  font-weight: 600;
}

.nav-item .nav-icon {
  font-size: 20px;
}

.center-nav-btn {
  position: relative;
  top: -14px;
}

.center-nav-btn .fab-circle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Buttons */
.btn {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: opacity 0.15s, transform 0.15s;
}

.btn:active {
  opacity: 0.85;
  transform: scale(0.98);
}

.btn-primary {
  background: var(--text-primary);
  color: #fff;
  width: 100%;
}

.btn-secondary {
  background: var(--bg-warm);
  color: var(--text-primary);
  width: 100%;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 100%;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  padding: 16px;
}

/* Forms */
.input-group {
  margin-bottom: 16px;
}

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

.input {
  width: 100%;
  padding: 13px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

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

.code-row {
  display: flex;
  gap: 10px;
}

.code-row .input {
  flex: 1;
}

.code-btn {
  padding: 13px 18px;
  background: var(--accent-light);
  color: #B8734A;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
}

.code-btn:disabled {
  opacity: 0.5;
}

/* Tag Pills */
.tag-pill {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.tag-pill-active {
  background: var(--text-primary);
  border-color: var(--text-primary);
  color: #fff;
}

/* Toast */
.toast {
  position: fixed;
  top: 60px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 10px 24px;
  border-radius: 20px;
  font-size: 14px;
  z-index: 1000;
  animation: toast-in 0.3s;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(-8px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}