:root {
    --color-primary: #c45c26;
    --color-primary-dark: #a04a1e;
    --color-secondary: #8b4513;
    --color-accent: #d4a574;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-light: #f8f5f2;
    --color-bg-dark: #2c2c2c;
    --color-success: #28a745;
    --color-error: #dc3545;
    --color-border: #e0e0e0;
    
    --font-family: 'Vazirmatn', 'Tahoma', 'Arial', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;
    
    --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: 8px;
    --border-radius-lg: 12px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

/* Load Vazirmatn Font (Local) */
@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    direction: rtl;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

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

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Section */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: var(--font-size-2xl);
    color: var(--color-secondary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--color-primary);
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: white;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: white;
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Header */
.header {
    background: var(--color-bg);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-secondary);
}

.logo-img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-light);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-text);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background: var(--color-text);
    transition: var(--transition);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-accent) 100%);
    padding-top: 70px;
    text-align: center;
}

.hero-content {
    padding: var(--spacing-2xl);
}

.hero-title {
    font-size: var(--font-size-3xl);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* About Section */
.about {
    background: var(--color-bg);
}

.about-text p {
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.about-features li {
    padding: var(--spacing-md);
    background: var(--color-bg-light);
    border-radius: var(--border-radius);
    font-weight: 500;
}

/* About Features Detailed */
.about-tagline {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.about-tagline .tag {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 50px;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.about-features-detailed {
    list-style: none;
    margin: var(--spacing-xl) 0;
}

.about-features-detailed li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: var(--color-bg-light);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.about-features-detailed li:hover {
    background: var(--color-bg);
    box-shadow: var(--shadow);
    transform: translateX(-5px);
}

.feature-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

/* Comparison Box */
.comparison-box {
    background: linear-gradient(135deg, #f8f5f2 0%, #fff 100%);
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    text-align: center;
}

.comparison-box h4 {
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.comparison-item {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
}

.comparison-item.ours {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
}

.comparison-item.others {
    background: #e0e0e0;
    color: var(--color-text);
}

.comparison-title {
    display: block;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

.comparison-value {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.comparison-result {
    font-size: var(--font-size-lg);
    color: var(--color-primary-dark);
    font-weight: 700;
    margin: 0;
}

@media (max-width: 600px) {
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .about-tagline .tag {
        font-size: var(--font-size-base);
        padding: var(--spacing-xs) var(--spacing-md);
    }
}

/* Products Section */
.products {
    background: var(--color-bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.product-card {
    background: var(--color-bg);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    height: 200px;
    overflow: hidden;
    background: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info {
    padding: var(--spacing-lg);
}

.product-title {
    font-size: var(--font-size-lg);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.product-desc {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* Order Section */
.order {
    background: var(--color-bg);
}

.order-desc {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.order-form {
    max-width: 500px;
    margin: 0 auto;
    background: var(--color-bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-group input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group input::placeholder {
    color: #999;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    display: block;
    background: #d4edda;
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.form-message.error {
    display: block;
    background: #f8d7da;
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

/* Field Errors */
.field-error {
    display: none;
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    padding-right: var(--spacing-xs);
}

.form-group input.input-error {
    border-color: var(--color-error);
    background-color: #fff5f5;
}

.form-group input.input-error:focus {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.15);
}

/* Contact Section */
.contact {
    background: var(--color-bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.contact-icon {
    font-size: 28px;
}

.contact-item h3 {
    font-size: var(--font-size-base);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.contact-item p,
.contact-item address {
    color: var(--color-text-light);
    font-style: normal;
    line-height: 1.6;
}

.phone-link {
    color: var(--color-primary);
    font-weight: 500;
    direction: ltr;
    display: inline-block;
}

.phone-link:hover {
    text-decoration: underline;
}

.contact-map {
    height: 100%;
    min-height: 350px;
}

.contact-map iframe {
    width: 100%;
    height: 100%;
    min-height: 350px;
}

/* Footer */
.footer {
    background: var(--color-bg-dark);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer p {
    opacity: 0.9;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin-left: var(--spacing-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   Responsive Styles
   ============================================ */

/* Tablet */
@media (max-width: 992px) {
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--color-bg);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--spacing-2xl);
        gap: var(--spacing-md);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-toggle.active .hamburger {
        background: transparent;
    }
    
    .nav-toggle.active .hamburger::before {
        transform: rotate(45deg);
        top: 0;
    }
    
    .nav-toggle.active .hamburger::after {
        transform: rotate(-45deg);
        top: 0;
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .order-form {
        padding: var(--spacing-lg);
    }
}
/* ============================================
   Brick Calculator Section
   ============================================ */
.calculator {
    background-color: var(--color-bg-light);
}

.calculator-desc {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.calculator-form {
    background: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    max-width: 500px;
    margin: 0 auto var(--spacing-xl);
}

.calculator-form .form-group {
    margin-bottom: var(--spacing-md);
}

.calculator-form select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    background-color: var(--color-bg);
    transition: var(--transition);
    cursor: pointer;
}

.calculator-form select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.calculator-result {
    background: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    border: 2px solid var(--color-primary);
}

.calculator-result h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.result-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--color-bg-light);
    border-radius: var(--border-radius);
}

.result-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.result-data {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.result-label {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.result-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
}

.result-note {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm);
    background: var(--color-bg-light);
    border-radius: var(--border-radius);
}

@media (max-width: 600px) {
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .result-item {
        flex-direction: row;
        gap: var(--spacing-md);
    }
    
    .result-icon {
        margin-bottom: 0;
    }
    
    .result-data {
        align-items: flex-start;
    }
}