/**
 * Seller Toolkit — global styles
 * UI colours per docs/03-UI设计规范.md
 */

/* Self-hosted Inter (Sprint 8 — no Google Fonts CDN) */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('../fonts/inter-latin-400-normal.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('../fonts/inter-latin-500-normal.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url('../fonts/inter-latin-600-normal.woff2') format('woff2');
}
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('../fonts/inter-latin-700-normal.woff2') format('woff2');
}

:root {
    --color-primary: #2563EB;
    --color-secondary: #0F172A;
    --color-success: #22C55E;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-bg: #FFFFFF;
    --color-bg-light: #F8FAFC;
    --color-border: #E5E7EB;
    --font-family: 'Inter', Arial, Helvetica, sans-serif;
    --max-width: 1280px;
    --content-width: 1200px;
    --btn-radius: 8px;
    --card-radius: 12px;
}

body {
    font-family: var(--font-family);
    color: var(--color-secondary);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#main-content {
    flex: 1;
}

.container {
    max-width: var(--content-width);
}

/* ── Icons (Lucide) ── */
.icon-sm { width: 18px; height: 18px; }
.icon-md { width: 24px; height: 24px; }
.icon-lg { width: 32px; height: 32px; }

/* ── Bootstrap overrides ── */
.text-primary { color: var(--color-primary) !important; }

.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    border-radius: var(--btn-radius);
    min-height: 48px;
    font-weight: 500;
}

.btn-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
}

.btn-outline-primary {
    color: var(--color-primary);
    border-color: var(--color-primary);
    border-radius: var(--btn-radius);
    min-height: 48px;
    font-weight: 500;
}

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

/* ── Header ── */
.site-header .navbar-brand {
    color: var(--color-primary);
    font-size: 1.25rem;
}

.site-header .nav-link {
    color: var(--color-secondary);
    font-weight: 500;
}

.site-header .nav-link:hover {
    color: var(--color-primary);
}

/* ── Search box ── */
.search-box .form-control,
.search-box .input-group-text {
    border-color: var(--color-border);
    border-radius: var(--btn-radius);
    min-height: 42px;
}

.search-box .form-control:focus {
    box-shadow: none;
    border-color: var(--color-primary);
}

/* ── Hero ── */
.hero-section {
    background-color: var(--color-bg-light);
}

.hero-trust-block {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 32px;
    padding: 16px 20px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--card-radius);
}

.hero-trust {
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
}

.hero-rating {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;
}

.hero-rating-stars {
    color: #F59E0B;
    font-size: 1.125rem;
    letter-spacing: 2px;
    line-height: 1;
    margin-bottom: 6px;
}

.hero-rating-text {
    font-size: 0.875rem;
}

.hero-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    line-height: 1.2;
    color: var(--color-secondary);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: #475569;
}

/* Hero tool preview mockup */
.hero-preview-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--card-radius);
    box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
    overflow: hidden;
}

.hero-preview-header {
    background: var(--color-bg-light);
    padding: 12px 16px;
    display: flex;
    gap: 6px;
    border-bottom: 1px solid var(--color-border);
}

.hero-preview-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
}

.hero-preview-body {
    padding: 20px;
}

.hero-preview-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--btn-radius);
    margin-bottom: 8px;
    font-size: 0.875rem;
    color: var(--color-secondary);
}

.hero-preview-result {
    margin-top: 12px;
    padding: 12px;
    background: #f0fdf4;
    border-radius: var(--btn-radius);
    font-size: 0.875rem;
    text-align: center;
}

/* ── Sections ── */
.section-py {
    padding: 64px 0;
}

.section-title {
    font-size: 1.75rem;
    color: var(--color-secondary);
}

.bg-light {
    background-color: var(--color-bg-light) !important;
}

/* ── Cards ── */
.tool-card,
.category-card {
    border: 1px solid var(--color-border);
    border-radius: var(--card-radius);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.tool-card:hover,
.category-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
}

.tool-card .btn-sm {
    min-height: 36px;
    border-radius: var(--btn-radius);
}

.tool-placeholder-card {
    border: 1px solid var(--color-border);
    border-radius: var(--card-radius);
    background: var(--color-bg-light);
}

/* Category tabs */
.category-tabs .nav-link {
    color: var(--color-secondary);
    border-radius: var(--btn-radius);
    font-weight: 500;
}

.category-tabs .nav-link.active {
    background-color: var(--color-primary);
}

.how-step-number {
    width: 40px; height: 40px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
}

.tool-form-card, .tool-result, .tool-placeholder-card {
    border: 1px solid var(--color-border);
    border-radius: var(--card-radius);
}

.tool-result-content { font-size: 0.9375rem; }

.ai-result-text { line-height: 1.7; white-space: pre-wrap; }

.page-content h2, .page-content h3, .page-content h4, .page-content h5, .page-content h6 {
    color: var(--color-secondary);
}
.page-content h2 { font-size: 1.25rem; margin-top: 1.5rem; }
.page-content h3, .page-content h4, .page-content h5, .page-content h6 { font-size: 1rem; margin-top: 1rem; }
.page-content p, .page-content li { color: #475569; line-height: 1.75; }
.page-content a { color: var(--color-primary); }
.page-content ul { padding-left: 1.25rem; }
.page-content .lead { font-size: 1.125rem; }

.contact-form .form-control,
.contact-form .form-select {
    border-color: var(--color-border);
    border-radius: var(--btn-radius);
    min-height: 44px;
}
.contact-form .form-control:focus,
.contact-form .form-select:focus {
    border-color: var(--color-primary);
    box-shadow: none;
}

/* ── Pricing (commercial) ── */
.pricing-card {
    border-radius: var(--card-radius);
    transition: transform 0.2s ease;
}
.pricing-card-featured {
    transform: scale(1.02);
}
.pricing-badge {
    background: var(--color-primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    padding: 0.35rem;
    border-radius: var(--card-radius) var(--card-radius) 0 0;
    margin: -1px -1px 0;
}
.pricing-price .display-6 {
    color: var(--color-secondary);
}
.pricing-features li {
    line-height: 1.5;
}

/* ── Email capture ── */
.email-capture-compact .form-control {
    min-height: 44px;
    border-radius: var(--btn-radius);
}

.blog-content h2 { font-size: 1.25rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.75rem; }
.blog-content p { color: var(--color-secondary); line-height: 1.7; }
.blog-content a { color: var(--color-primary); }

@media (min-width: 1200px) {
    .tool-card-col { flex: 0 0 25%; max-width: 25%; }
}

/* ── FAQ accordion ── */
.accordion-item {
    border-color: var(--color-border);
    border-radius: var(--btn-radius) !important;
    margin-bottom: 8px;
    overflow: hidden;
}

.accordion-button {
    font-weight: 500;
    color: var(--color-secondary);
    background-color: var(--color-bg);
}

.accordion-button:not(.collapsed) {
    color: var(--color-primary);
    background-color: var(--color-bg-light);
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--color-border);
}

/* ── Footer ── */
.site-footer .footer-brand {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.site-footer .footer-heading {
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.site-footer .footer-link {
    color: #94a3b8;
    text-decoration: none;
    display: inline-block;
    padding: 0.375rem 0;
    min-height: 44px;
    line-height: 1.5;
}

.site-footer .footer-link:hover {
    color: #ffffff;
}

/* ── Responsive ── */
@media (max-width: 991px) {
    .section-py {
        padding: 48px 0;
    }
}

@media (max-width: 575px) {
    .hero-section {
        text-align: center;
    }

    .hero-section .d-flex {
        justify-content: center;
    }

    .hero-section .mb-4 {
        margin-left: auto;
        margin-right: auto;
    }
}