/**
 * TalkStock Legal Pages - Terms & Privacy
 * ========================================
 * Shared styles for /terms and /privacy pages
 * Uses brand-system.css design tokens (v2.0 --color-* semantic tokens)
 */

/* ==================== Reset & Base ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--brand-font-family, 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    line-height: 1.6;
}

/* ==================== Header Bar ==================== */
.legal-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 56px;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border-default);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.legal-header-back {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.15s;
}

.legal-header-back:hover {
    color: var(--color-accent-hover);
}

.legal-header-back svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.legal-header-logo {
    height: 28px;
    width: auto;
}

/* ==================== Main Content ==================== */
.legal-main {
    max-width: 800px;
    margin: 0 auto;
    padding: 80px 24px 64px;
}

/* ==================== Page Title ==================== */
.legal-title {
    font-size: 30px;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

/* ==================== Effective Date Badge ==================== */
.legal-date-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--color-accent-muted);
    color: var(--color-accent);
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--brand-radius-full, 9999px);
    margin-bottom: 32px;
}

.legal-date-badge svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* ==================== Table of Contents ==================== */
.legal-toc {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-default);
    border-radius: var(--brand-radius-lg, 20px);
    padding: 24px 28px;
    margin-bottom: 40px;
}

.legal-toc-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 16px;
}

.legal-toc-list {
    list-style: none;
    counter-reset: toc-counter;
}

.legal-toc-list li {
    counter-increment: toc-counter;
    margin-bottom: 4px;
}

.legal-toc-list li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--brand-radius-md, 12px);
    text-decoration: none;
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: all 0.15s;
}

.legal-toc-list li a::before {
    content: counter(toc-counter);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-accent-muted);
    color: var(--color-accent);
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
}

.legal-toc-list li a:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
}

/* ==================== Section ==================== */
.legal-section {
    margin-bottom: 40px;
    scroll-margin-top: 72px;
}

.legal-section h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
    padding-left: 16px;
    border-left: 4px solid var(--color-accent);
    margin-bottom: 16px;
    line-height: 1.4;
}

.legal-section p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.legal-section ul,
.legal-section ol {
    padding-left: 24px;
    margin-bottom: 12px;
}

.legal-section li {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.legal-section strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* Highlight box for important disclaimers */
.legal-highlight {
    background: var(--color-accent-muted);
    border: 1px solid var(--color-accent-subtle);
    border-radius: var(--brand-radius-md, 12px);
    padding: 16px 20px;
    margin: 16px 0;
}

.legal-highlight p {
    color: var(--color-text-primary);
    font-weight: 500;
    margin-bottom: 0;
}

/* Warning box for liability */
.legal-warning {
    background: var(--color-danger-subtle);
    border: 1px solid rgba(239, 68, 68, 0.12);
    border-radius: var(--brand-radius-md, 12px);
    padding: 16px 20px;
    margin: 16px 0;
}

.legal-warning p {
    color: var(--color-text-primary);
    font-weight: 500;
    margin-bottom: 0;
}

/* ==================== Page Footer ==================== */
.legal-footer {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border-default);
    text-align: center;
}

.legal-footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}

.legal-footer-links a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.15s;
}

.legal-footer-links a:hover {
    color: var(--color-accent-hover);
}

.legal-footer-links .legal-dot {
    color: var(--color-text-muted);
    font-size: 10px;
}

.legal-footer-copyright {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ==================== Language Switcher ==================== */
.legal-lang-switcher {
    position: relative;
}

.legal-lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--color-border-default);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all 0.15s;
    font-family: inherit;
}

.legal-lang-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-text-primary);
}

.legal-lang-btn.open {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.legal-lang-chevron {
    transition: transform 0.2s;
}

.legal-lang-btn.open .legal-lang-chevron {
    transform: rotate(180deg);
}

.legal-lang-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 140px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-default);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s, visibility 0.15s;
    z-index: 200;
}

.legal-lang-dropdown.open {
    opacity: 1;
    visibility: visible;
}

.legal-lang-option {
    display: block;
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 400;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.12s;
}

.legal-lang-option:hover {
    background: var(--color-accent-muted);
    color: var(--color-text-primary);
}

.legal-lang-option.active {
    color: var(--color-accent);
    font-weight: 600;
}

/* ==================== Back to Top Button ==================== */
.legal-back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-accent);
    color: var(--color-text-on-accent);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px var(--color-accent-subtle);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    z-index: 99;
}

.legal-back-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.legal-back-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.legal-back-top svg {
    width: 20px;
    height: 20px;
}

/* ==================== Dark Theme ==================== */
[data-theme="dark"] body {
    background: var(--color-bg-page);
    color: var(--color-text-primary);
}

[data-theme="dark"] .legal-header {
    background: var(--color-bg-secondary);
    border-bottom-color: var(--color-border-default);
}

[data-theme="dark"] .legal-toc {
    background: var(--color-bg-secondary);
    border-color: var(--color-border-default);
}

[data-theme="dark"] .legal-highlight {
    background: var(--color-accent-muted);
    border-color: var(--color-accent-subtle);
}

[data-theme="dark"] .legal-warning {
    background: var(--color-danger-subtle);
    border-color: rgba(239, 68, 68, 0.2);
}

[data-theme="dark"] .legal-footer {
    border-top-color: var(--color-border-default);
}

[data-theme="dark"] .legal-lang-btn {
    border-color: var(--color-border-default);
}

[data-theme="dark"] .legal-lang-dropdown {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-default);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .legal-lang-option:hover {
    background: var(--color-bg-hover);
}

[data-theme="dark"] .legal-back-top {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .legal-back-top:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .legal-toc-list li a:hover {
    background: var(--color-bg-hover);
}

/* ==================== Desktop (>=768px) ==================== */
@media (min-width: 768px) {
    .legal-header {
        padding: 0 40px;
    }

    .legal-main {
        padding: 88px 40px 80px;
    }

    .legal-toc {
        padding: 28px 32px;
    }
}

/* ==================== Large Desktop (>=1200px) ==================== */
@media (min-width: 1200px) {
    .legal-header {
        padding: 0 64px;
    }

    .legal-main {
        padding: 96px 48px 80px;
    }
}

/* ==================== Small Mobile (<=380px) ==================== */
@media (max-width: 380px) {
    .legal-main {
        padding: 72px 20px 48px;
    }

    .legal-title {
        font-size: 24px;
    }

    .legal-section h2 {
        font-size: 18px;
    }

    .legal-toc {
        padding: 20px;
        border-radius: var(--brand-radius-md, 12px);
    }

    .legal-back-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

/* ==================== Accessibility ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto !important;
    }
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ==================== Print ==================== */
@media print {
    .legal-header,
    .legal-back-top,
    .legal-lang-switcher {
        display: none !important;
    }

    .legal-main {
        padding: 0;
        max-width: 100%;
    }

    .legal-section {
        page-break-inside: avoid;
    }

    .legal-toc {
        border: 1px solid #ccc;
    }

    body {
        background: #fff;
        color: #000;
    }

    .legal-section p,
    .legal-section li {
        color: #333;
    }
}