/* ===== CSS Variables ===== */
:root {
    /* Colors (refreshed palette: teal + indigo + warm accent) */
    --primary: #0ea5a4;
    --primary-dark: #0b8f89;
    --primary-light: #2dd4bf;
    --secondary: #6366f1;
    --accent: #f59e0b;
    --dark: #0f1724;
    --dark-light: #24303a;
    --light: #f8fafc;
    --gray: #6b7280;
    --gray-light: #e6eef2;
    --gray-lighter: #f7fafc;
    --success: #16a34a;
    --warning: #f59e0b;
    --danger: #ef4444;
    --price-color: #0ea5a4;
    
    /* Typography */
    --font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 1rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-hover: 0 20px 50px rgba(14, 165, 164, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Container */
    --container-xs: 100%;
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--dark);
    background-color: var(--light);
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-tap-highlight-color: transparent;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--dark);
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-base);
}

/* Top banner */
.site-top-banner {
    width: 100%;
    background: transparent;
    display: block;
    position: relative;
}

.site-top-banner .top-accent {
    height: 4rem;
    background: #0084ff;
    width: 100%;
    display: block;
    margin: 0;
    position: relative;
    overflow: hidden;
}

.site-top-banner .top-accent .top-text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    margin: 0;
    color: white;
    font-weight: 800;
    font-size: clamp(1rem, 2.4vw, 1.5rem);
    line-height: 1;
    white-space: nowrap;
    text-align: center;
    width: 100%;
    padding: 0 var(--spacing-md);
}

.header.scrolled {
    padding: var(--spacing-xs) 0;
    box-shadow: var(--shadow-lg);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    height: 60px;
}

/* Navigation */
.nav {
    flex: 1;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
    margin: 0;
    padding: 0;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--dark);
    text-decoration: none;
    font-weight: 700;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    cursor: default;
}

.nav-link .nav-caret {
    margin-inline-start: var(--spacing-xs);
    font-size: 1.2rem;
    color: currentColor;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 1em;
    line-height: 1;
    transform-origin: center;
    transition: transform var(--transition-fast);
}

.nav-item:hover .nav-caret {
    transform: rotate(180deg);
}

.nav-link:hover,
.nav-link.active {
    background: rgba(14, 165, 164, 0.08);
    color: var(--primary);
}

/* Submenu */
.submenu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 220px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: 100;
    padding: var(--spacing-sm);
    border: 1px solid var(--gray-light);
    max-height: 70vh;
    overflow-y: auto;
}

.nav-item:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu-item {
    margin-bottom: var(--spacing-xs);
}

.submenu-item:last-child {
    margin-bottom: 0;
}

.submenu-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.submenu-link:hover {
    background: rgba(14, 165, 164, 0.08);
    color: var(--primary);
    padding-right: var(--spacing-lg);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    align-items: center;
    justify-content: center;
    position: relative;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--primary);
    border-radius: 2px;
    transition: all var(--transition-base);
    position: absolute;
}

.mobile-menu-btn span:nth-child(1) {
    top: 12px;
}

.mobile-menu-btn span:nth-child(2) {
    top: 19px;
    opacity: 1;
}

.mobile-menu-btn span:nth-child(3) {
    top: 26px;
}

.mobile-menu-btn.active span:nth-child(1) {
    top: 19px;
    transform: rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-btn.active span:nth-child(3) {
    top: 19px;
    transform: rotate(-45deg);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary);
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    white-space: nowrap;
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
    margin-left: 3rem;
}

.contact-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    background: linear-gradient(135deg, rgba(14, 165, 164, 0.05), rgba(99, 102, 241, 0.05));
    padding: 1.8rem 0;
    margin-top: 140px;
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    position: relative;
    overflow: hidden;
}

.breadcrumb::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(14, 165, 164, 0.1) 0%, transparent 70%);
}

.breadcrumb-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.breadcrumb ul {
    display: flex;
    list-style: none;
    gap: 12px;
    color: var(--gray);
    font-size: 1rem;
    align-items: center;
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-base);
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 8px;
    display: inline-block;
}

.breadcrumb a:hover {
    color: var(--primary-dark);
    background: rgba(14, 165, 164, 0.1);
    transform: translateY(-2px);
}

.breadcrumb li:not(:last-child)::after {
    content: "›";
    margin-right: 12px;
    color: var(--primary);
    font-weight: bold;
}

/* ===== فوتر ===== */
.main-footer {
    background: linear-gradient(135deg, var(--dark), #0f172a);
    color: white;
    padding: 5rem 0 2.5rem;
    margin-top: 6rem;
    border-top: 4px solid var(--primary);
    position: relative;
    overflow: hidden;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-column h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1.8rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid var(--accent);
    display: inline-block;
    font-weight: 700;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 1rem;
}

.footer-link {
    color: #cbd5e0;
    text-decoration: none;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.05rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    width: 100%;
}

.footer-link:hover {
    color: white;
    transform: translateX(-10px);
    background: rgba(255, 255, 255, 0.1);
}

.footer-link i {
    font-size: 0.9rem;
    color: var(--accent);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
    color: #cbd5e0;
}

.contact-icon {
    color: var(--accent);
    font-size: 1.3rem;
    margin-top: 0.2rem;
    min-width: 24px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-link {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition-base);
    font-size: 1.2rem;
}

.social-link:hover {
    background: var(--primary);
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 10px 20px rgba(14, 165, 164, 0.3);
}

.footer-bottom {
    text-align: center;
    padding-top: 2.5rem;
    border-top: 1px solid #4a5568;
    color: #a0aec0;
    font-size: 1rem;
    position: relative;
}

.footer-bottom::before {
    content: '';
    position: absolute;
    top: 0;
    right: 50%;
    transform: translateX(50%);
    width: 200px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

/* ===== Responsive Design ===== */
/* Large Desktop (≥1400px) */
@media (min-width: 1400px) {
    .container {
        max-width: var(--container-2xl);
    }
}

/* Tablet Portrait (768px - 991px) */
@media (max-width: 991px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 100px;
        right: -100%;
        width: 320px;
        height: calc(100vh - 100px);
        background: white;
        transition: right var(--transition-base);
        overflow-y: auto;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-2xl);
        border-top: 1px solid var(--gray-light);
        z-index: 999;
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-xs);
        align-items: stretch;
    }
    
    .nav-item {
        width: 100%;
    }
    
    .nav-link {
        width: 100%;
        justify-content: space-between;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
        border: 1px solid var(--gray-light);
    }
    
    .nav-caret {
        transition: transform var(--transition-base);
    }
    
    .nav-item.active .nav-caret {
        transform: rotate(180deg);
    }
    
    .submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: var(--gray-lighter);
        margin-top: var(--spacing-xs);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
        padding: 0;
        width: 100%;
    }
    
    .nav-item.active .submenu {
        max-height: 500px;
        padding: var(--spacing-sm) 0;
        margin-top: var(--spacing-xs);
    }
    
    .submenu-link {
        padding: var(--spacing-sm) var(--spacing-xl);
        font-size: var(--font-size-sm);
    }
}

/* Mobile Landscape (576px - 767px) */
@media (max-width: 767px) and (min-width: 576px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Mobile Portrait (≤575px) */
@media (max-width: 575px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .site-top-banner .top-accent {
        height: 3.5rem;
    }
    
    .site-top-banner .top-accent .top-text {
        font-size: 0.9rem;
        white-space: normal;
        text-align: center;
        padding: 0 var(--spacing-sm);
    }
    
    .header-container {
        height: 50px;
        gap: var(--spacing-sm);
    }
    
    .mobile-menu-btn {
        width: 36px;
        height: 36px;
    }
    
    .mobile-menu-btn span {
        width: 20px;
    }
    
    .nav {
        top: 90px;
        width: 100%;
        height: calc(100vh - 90px);
        padding: var(--spacing-md);
    }
    
    .breadcrumb {
        margin-top: 130px;
    }
}

/* Small Mobile (≤375px) */
@media (max-width: 375px) {
    .nav {
        width: 100%;
        padding: var(--spacing-sm);
    }
    
    .nav-link {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
    
    .submenu-link {
        padding: var(--spacing-xs) var(--spacing-lg);
        font-size: var(--font-size-xs);
    }
    
    .breadcrumb {
        margin-top: 120px;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .nav-link:hover {
        background: transparent;
    }
    
    .nav-item:hover .submenu {
        opacity: 0;
        visibility: hidden;
    }
    
    .nav-item.active .submenu {
        opacity: 1;
        visibility: visible;
    }
    
    /* Add active states for touch devices */
    .nav-link:active {
        background: rgba(14, 165, 164, 0.08);
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .header {
        background: white;
        border-bottom: 2px solid black;
    }
    
    .nav-link {
        border: 1px solid black;
    }
}

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

/* ===== Utilities ===== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== Responsive Adjustments ===== */
@media (max-width: 1200px) {
    .header-container,
    .breadcrumb-content,
    .footer-container {
        max-width: 100%;
    }
}

@media (max-width: 992px) {
    .breadcrumb {
        margin-top: 130px;
    }
}

@media (max-width: 768px) {
    .header-container,
    .breadcrumb-content,
    .footer-container {
        padding: 0 1.5rem;
    }
    
    .breadcrumb {
        margin-top: 120px;
        padding: 1.5rem 0;
    }
}

@media (max-width: 480px) {
    .breadcrumb {
        margin-top: 110px;
    }

}