/**
 * Fast Source Theme - Base Design System & Core Styles
 * 
 * High-performance, zero-bloat CSS Reset, Tokens, Layout & Components.
 * Direction: RTL by default for Persian/Arabic source code marketplaces.
 */

:root {
    /* Color Palette: Sleek Developer Theme (Linear / GitHub / Raycast inspired) */
    --color-bg-base: #0b0f19;
    --color-bg-surface: #111827;
    --color-bg-card: #1f2937;
    --color-bg-card-hover: #263346;
    --color-bg-subtle: #162032;

    --color-border: #2e3a51;
    --color-border-hover: #3b82f6;
    --color-border-subtle: #1e283d;

    --color-text-main: #f3f4f6;
    --color-text-secondary: #9ca3af;
    --color-text-muted: #6b7280;

    /* Accent & Brand Colors */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-glow: rgba(59, 130, 246, 0.25);

    --color-accent-emerald: #10b981;
    --color-accent-emerald-glow: rgba(16, 185, 129, 0.2);
    --color-accent-purple: #8b5cf6;
    --color-accent-amber: #f59e0b;
    --color-accent-rose: #f43f5e;

    /* Typography */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Vazirmatn", Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Fira Code", monospace;

    /* Transitions & Shadows */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 25px var(--color-primary-glow);

    /* Dimensions */
    --container-max: 1240px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

/* 1. Universal Reset & Box-Sizing */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    direction: rtl;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-base);
    color: var(--color-text-main);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Accessibility Skip Link */
.screen-reader-text,
.skip-link {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link:focus {
    position: fixed;
    top: 1rem;
    right: 1rem;
    width: auto;
    height: auto;
    clip: auto;
    background: var(--color-primary);
    color: #fff;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    z-index: 9999;
}

/* 2. Container & Layout System */
.content-container,
.header-container,
.footer-container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.site-main {
    flex: 1 0 auto;
    padding-block: 2.5rem 4rem;
}

/* 3. Typography & Elements */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-main);
    font-weight: 700;
    line-height: 1.3;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

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

code, pre {
    font-family: var(--font-mono);
    direction: ltr;
    text-align: left;
}

/* 4. Header & Navigation Component */
.site-header {
    background-color: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-normal);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4.5rem;
    gap: 1.5rem;
}

.header-brand .brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent-purple));
    border-radius: var(--radius-md);
    color: #fff;
    box-shadow: 0 0 15px var(--color-primary-glow);
}

.brand-icon svg {
    width: 1.35rem;
    height: 1.35rem;
}

.brand-title {
    font-size: 1.25rem;
    font-weight: 800;
    background: linear-gradient(to left, #fff, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Navigation List */
.header-nav .nav-list {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 0.5rem 0.25rem;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text-main);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}

.nav-link:hover::after {
    transform: scaleX(1);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cart-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    position: relative;
    transition: all var(--transition-fast);
}

.cart-button:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.cart-button svg {
    width: 1.2rem;
    height: 1.2rem;
}

.cart-badge {
    position: absolute;
    top: -0.3rem;
    left: -0.3rem;
    background-color: var(--color-accent-rose);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    width: 1.15rem;
    height: 1.15rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.mobile-menu-toggle svg {
    width: 1.35rem;
    height: 1.35rem;
}

/* 5. Breadcrumb Navigation */
.breadcrumb-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.breadcrumb-nav a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.breadcrumb-nav a:hover {
    color: var(--color-primary);
}

.breadcrumb-separator {
    color: var(--color-border);
    font-size: 0.75rem;
}

.breadcrumb-current {
    color: var(--color-text-main);
    font-weight: 600;
}

/* 6. Footer Component */
.site-footer {
    background-color: var(--color-bg-surface);
    border-top: 1px solid var(--color-border-subtle);
    padding-top: 3.5rem;
    padding-bottom: 2rem;
    margin-top: auto;
}

.footer-main-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col-brand .brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-about {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    max-width: 380px;
}

.footer-col-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--color-text-main);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.footer-links a:hover {
    color: var(--color-primary);
    padding-right: 0.35rem;
}

.footer-feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.footer-feature-list li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.88rem;
    color: var(--color-text-secondary);
}

.icon-feature {
    width: 1.1rem;
    height: 1.1rem;
    color: var(--color-accent-emerald);
    flex-shrink: 0;
}

.footer-bottom-bar {
    border-top: 1px solid var(--color-border-subtle);
    padding-top: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.copyright-text {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.footer-badges {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.badge-php-engine,
.badge-zero-bloat {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-base);
    color: var(--color-text-secondary);
}

.badge-php-engine {
    border-color: rgba(59, 130, 246, 0.4);
    color: #93c5fd;
}

/* 7. Empty State Component */
.empty-state-card {
    text-align: center;
    background-color: var(--color-bg-card);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    max-width: 580px;
    margin-inline: auto;
}

.icon-large {
    width: 3.5rem;
    height: 3.5rem;
    color: var(--color-text-muted);
    margin: 0 auto 1.5rem auto;
}

.empty-state-title {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
}

.empty-state-message {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.75rem;
}

.btn-return-shop {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    background-color: var(--color-primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-return-shop:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

/* 8. Mobile Navigation Responsiveness */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .header-nav {
        position: fixed;
        top: 4.5rem;
        left: 0;
        right: 0;
        background-color: var(--color-bg-surface);
        border-bottom: 1px solid var(--color-border);
        padding: 1.5rem;
        display: none;
        flex-direction: column;
        box-shadow: var(--shadow-lg);
    }

    .header-nav.is-active {
        display: flex;
    }

    .header-nav .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .nav-link {
        padding: 0.75rem 1rem;
        background-color: var(--color-bg-card);
        border-radius: var(--radius-sm);
    }

    .footer-main-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}