:root {
    --primary: #2B6E4F;
    --primary-dark: #1F5A3E;
    --primary-light: #3A8A65;
    --primary-bg: rgba(43,110,79,0.06);
    --gradient-brand: linear-gradient(135deg, #2B6E4F, #1F5A3E);
    --success: #2B8A4E;
    --warning: #C08B3C;
    --error: #B85C38;
    --info: #3B7BA8;
    --text-primary: #2C3630;
    --text-secondary: #4A5B52;
    --text-tertiary: #7A8E82;
    --text-placeholder: #B0BEB5;
    --border: #D8DFD9;
    --border-light: #E8ECE9;
    --bg-page: #F0EDE6;
    --bg-card: #FAFAF6;
    --bg-hover: #EDECE6;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px rgba(44,54,48,0.04), 0 1px 6px rgba(44,54,48,0.02);
    --shadow-md: 0 3px 8px rgba(44,54,48,0.05), 0 2px 6px rgba(44,54,48,0.03);
    --shadow-lg: 0 8px 16px rgba(44,54,48,0.06), 0 4px 8px rgba(44,54,48,0.03);
    --shadow-xl: 0 16px 32px rgba(44,54,48,0.07), 0 8px 16px rgba(44,54,48,0.03);
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-base: 16px;
    --space-lg: 20px;
    --space-xl: 24px;
    --space-2xl: 32px;
    --header-height: 56px;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }

.app-header {
    background: var(--bg-card);
    padding: 0 24px;
    height: var(--header-height);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.header-back {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 1.2em;
    flex-shrink: 0;
    transition: color 0.2s;
}
.header-back:hover { color: var(--primary); }
.header-title {
    flex: 1;
    font-size: 1.15em;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}
.header-actions a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9em;
    transition: color 0.2s;
}
.header-actions a:hover { color: var(--primary); }

.app-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
}
.app-container-narrow {
    max-width: 480px;
    margin: 0 auto;
    padding: 20px;
}
.app-container-wide {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: box-shadow 0.2s;
}
.card:hover {
    box-shadow: var(--shadow-md);
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-base);
}
.card-title {
    font-size: 1.05em;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    font-family: var(--font-sans);
    line-height: 1.5;
    color: var(--text-primary);
    white-space: nowrap;
}
.btn-primary {
    background: var(--primary);
    color: white;
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}
.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg);
}
.btn-success {
    background: var(--success);
    color: white;
}
.btn-success:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}
.btn-danger {
    background: var(--error);
    color: white;
}
.btn-danger:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}
.btn-warning {
    background: var(--warning);
    color: white;
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: white;
}
.btn-sm {
    padding: 4px 12px;
    font-size: 0.8em;
}
.btn-lg {
    padding: 12px 24px;
    font-size: 1em;
}
.btn-block {
    width: 100%;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.form-group {
    margin-bottom: var(--space-base);
}
.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-size: 0.9em;
}
.form-input {
    width: 100%;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9em;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-card);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(43,110,79,0.12);
}
.form-input::placeholder {
    color: var(--text-placeholder);
}
select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237A8E82' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}
textarea.form-input {
    height: auto;
    min-height: 100px;
    padding: 10px 12px;
    resize: vertical;
    line-height: 1.6;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    gap: 0;
    margin-bottom: var(--space-lg);
    background: var(--bg-card);
}
.tab {
    padding: 10px 20px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 500;
    color: var(--text-tertiary);
    border: none;
    background: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all 0.2s;
    font-family: var(--font-sans);
}
.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}
.tab:hover {
    color: var(--text-secondary);
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(44,54,48,0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}
.modal-container {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 520px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: modalIn 0.2s ease-out;
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}
.modal-header h3 {
    font-size: 1.05em;
    font-weight: 600;
    margin: 0;
}
.modal-close {
    background: none;
    border: none;
    font-size: 1.5em;
    color: var(--text-tertiary);
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
}
.modal-close:hover { color: var(--text-secondary); }
.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 20px;
    border-top: 1px solid var(--border);
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.97) translateY(8px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.toast {
    position: fixed;
    top: 72px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 0.9em;
    font-weight: 500;
    color: white;
    z-index: 2000;
    opacity: 0;
    transition: all 0.3s;
    white-space: nowrap;
    pointer-events: none;
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.toast-success { background: var(--success); }
.toast-error { background: var(--error); }
.toast-warning { background: var(--warning); }
.toast-info { background: var(--info); }

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-tertiary);
}
.empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
}
.empty-text {
    font-size: 0.9em;
    margin-bottom: 16px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}
.stat-value {
    font-size: 1.8em;
    font-weight: 700;
    color: var(--primary);
}
.stat-label {
    font-size: 0.8em;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-xl);
    font-size: 0.75em;
    font-weight: 500;
}
.badge-success { background: rgba(43,138,78,0.08); color: var(--success); }
.badge-warning { background: rgba(192,139,60,0.08); color: var(--warning); }
.badge-error { background: rgba(184,92,56,0.08); color: var(--error); }
.badge-info { background: rgba(59,123,168,0.08); color: var(--info); }
.badge-primary { background: rgba(43,110,79,0.08); color: var(--primary); }

.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: var(--space-lg) 0;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.9em;
    margin-bottom: var(--space-base);
    transition: color 0.2s;
}
.back-link:hover { color: var(--primary); }

.progress-bar {
    height: 8px;
    background: var(--border-light);
    border-radius: 4px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.3s;
}

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.9em;
    margin-bottom: var(--space-base);
}
.alert-success { background: rgba(43,138,78,0.06); color: #1a5a32; border-left: 3px solid var(--success); }
.alert-warning { background: rgba(192,139,60,0.06); color: #6b4d1a; border-left: 3px solid var(--warning); }
.alert-error { background: rgba(184,92,56,0.06); color: #6b3420; border-left: 3px solid var(--error); }
.alert-info { background: rgba(59,123,168,0.06); color: #1d4a6e; border-left: 3px solid var(--info); }

.loading {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-tertiary);
}
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 10px;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 1024px) {
    .app-container-wide { padding: 16px; }
}

@media (max-width: 768px) {
    .app-header { padding: 0 16px; }
    .header-title { font-size: 1em; }
    .app-container, .app-container-narrow, .app-container-wide { padding: 16px; }
    .card { padding: 16px; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .tab { padding: 8px 14px; font-size: 0.85em; }
}

@media (max-width: 640px) {
    .app-header { padding: 0 12px; height: 48px; }
    .header-title { font-size: 0.95em; }
    .app-container, .app-container-narrow, .app-container-wide { padding: 12px; }
    .card { padding: 14px; border-radius: var(--radius-md); }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .grid-auto { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
    .tab { padding: 8px 12px; font-size: 0.8em; }
    .btn { min-height: 36px; }
    .btn-sm { min-height: 28px; }
    .modal-overlay { padding: 0; }
    .modal-container { max-width: 100%; height: 100vh; border-radius: 0; max-height: 100vh; }
    .stat-value { font-size: 1.5em; }
}

@media (max-width: 480px) {
    .app-container, .app-container-narrow, .app-container-wide { padding: 10px; }
    .card { padding: 12px; margin-bottom: 12px; }
}