/* styles.css */

:root {
    --primary-color: #1c335f;
    --primary-hover: #142546;
    --primary-light: #e8eef7;

    --secondary-color: #5b6470;
    --accent-color: #b0894f;
    --accent-strong: #8f6a2c;

    --success-color: #1a8f66;
    --warning-color: #c47f2f;
    --error-color: #c0392b;

    --bg-body: #f6f2eb;
    --bg-card: #fffdf8;
    --bg-elevated: #ffffff;

    --text-main: #1c1b17;
    --text-secondary: #6b6a67;

    --border-color: #e3ddd3;
    --border-strong: #d5c9b8;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 22px;

    --shadow-sm: 0 1px 2px rgba(12, 10, 6, 0.06);
    --shadow-md: 0 10px 30px rgba(26, 25, 22, 0.1);
    --shadow-lg: 0 18px 50px rgba(26, 25, 22, 0.14);

    --transition: all 0.25s ease;
    --header-height: 68px;

    --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
    --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    background-color: var(--bg-body);
    background-image:
        radial-gradient(circle at 15% 20%, rgba(176, 137, 79, 0.18), transparent 45%),
        radial-gradient(circle at 80% 0%, rgba(28, 51, 95, 0.2), transparent 45%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.75), rgba(246, 242, 235, 0.95));
    background-attachment: fixed;
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

img {
    max-width: 100%;
    display: block;
}

/* Navigation */
.navbar {
    background: rgba(255, 253, 248, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.75rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: 0.4px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.75rem;
    width: 100%;
    flex: 1;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 1.6rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.55rem 1.1rem;
    border-radius: 999px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    font-size: 0.95rem;
    white-space: nowrap;
    font-family: var(--font-serif);
}

.btn-primary {
    background: linear-gradient(135deg, #1c335f, #2c4a7f);
    color: #fff;
    border-color: rgba(28, 51, 95, 0.4);
    box-shadow: 0 8px 20px rgba(28, 51, 95, 0.2);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(28, 51, 95, 0.28);
}

.btn-secondary {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: rgba(28, 51, 95, 0.2);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(28, 51, 95, 0.12);
}

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

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-ghost {
    background: transparent;
    border: 1px dashed var(--border-strong);
    color: var(--text-secondary);
}

.btn-ghost:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-lg {
    padding: 0.7rem 1.6rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.3rem 0.65rem;
    font-size: 0.85rem;
}

.btn-full {
    width: 100%;
}

/* Forms */
.input-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.form-control,
.form-select,
textarea {
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--bg-elevated);
    width: 100%;
    font-family: var(--font-serif);
    color: var(--text-main);
}

.form-control:focus,
.form-select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(28, 51, 95, 0.12);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.table th,
.table td {
    padding: 0.8rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: rgba(246, 242, 235, 0.8);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.table tr:hover {
    background-color: rgba(232, 238, 247, 0.6);
}

/* Toast */
.toast-container {
    position: fixed;
    top: 90px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg-elevated);
    padding: 0.9rem 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 280px;
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.toast.success { border-left-color: var(--success-color); }
.toast.error { border-left-color: var(--error-color); }
.toast.warning { border-left-color: var(--warning-color); }

/* Footer */
footer {
    background: rgba(255, 253, 248, 0.9);
    border-top: 1px solid var(--border-color);
    padding: 2.2rem 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: auto;
}

/* Helpers */
.mobile-hide {
    display: inline;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 0.82rem;
    font-weight: 600;
}

/* Hero */
.page-hero {
    margin-bottom: 2rem;
    text-align: left;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(176, 137, 79, 0.16);
    color: var(--accent-strong);
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: clamp(1.8rem, 3.2vw, 2.6rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    color: var(--text-secondary);
    max-width: 700px;
}

/* Advanced Search Layout */
.advanced-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.panel {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.panel-header {
    padding: 1.5rem 1.6rem 0.5rem 1.6rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.panel-title {
    font-size: 1.15rem;
    font-weight: 700;
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

.panel-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.35rem;
}

.panel-body {
    padding: 1rem 1.6rem 1.4rem 1.6rem;
}

.panel-footer {
    padding: 0 1.6rem 1.6rem 1.6rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.logic-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.2rem;
}

.logic-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.logic-hint {
    color: var(--text-secondary);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.segmented {
    display: inline-flex;
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.15rem;
    gap: 0.2rem;
}

.segmented input {
    display: none;
}

.segmented label {
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
}

.segmented input:checked + label {
    background: var(--primary-color);
    color: #fff;
}

.rule-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.chip-group {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    align-items: center;
}

.chip-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.chip {
    border: 1px solid var(--border-color);
    background: var(--bg-elevated);
    color: var(--text-main);
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-serif);
}

.chip:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.rule-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.rule-list {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    counter-reset: rule;
}

.rule-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.9rem 1rem;
    background: var(--bg-elevated);
    position: relative;
    counter-increment: rule;
}

.rule-card::before {
    content: counter(rule);
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.rule-grid {
    display: grid;
    grid-template-columns: minmax(120px, 1.1fr) minmax(110px, 0.9fr) minmax(160px, 1.6fr) auto;
    gap: 0.8rem;
    align-items: end;
}

.rule-item label {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
    display: block;
}

.btn-remove {
    width: 40px;
    height: 40px;
    border-radius: 999px;
    background: #f8e7e2;
    color: var(--error-color);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-remove:hover {
    background: var(--error-color);
    color: #fff;
}

.inline-tips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.cta-group {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.preview-panel {
    margin: 0 1.6rem 1.6rem 1.6rem;
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-lg);
    background: rgba(246, 242, 235, 0.7);
    padding: 0.8rem 1rem;
}

.preview-panel summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--primary-color);
}

.json-preview {
    background: #111827;
    color: #d7dde6;
    padding: 1rem;
    border-radius: var(--radius-md);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.85rem;
    margin-top: 0.8rem;
    white-space: pre-wrap;
}

.summary-panel .panel-body {
    padding-top: 0.5rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 0;
    border-bottom: 1px dashed var(--border-color);
    font-size: 0.95rem;
}

.summary-item strong {
    color: var(--primary-color);
    font-weight: 700;
}

.summary-note {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.empty-state,
.loading-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
    .advanced-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-elevated);
        flex-direction: column;
        padding: 1rem;
        gap: 0.5rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .container {
        padding: 2rem 1.2rem;
    }

    .mobile-hide {
        display: none;
    }

    .rule-grid {
        grid-template-columns: 1fr;
    }

    .btn-remove {
        justify-self: flex-end;
    }

    .panel-header {
        align-items: flex-start;
    }
}