/* ============================================
   سپیدراه کلینیک - Main Stylesheet
   RTL | Responsive | Modern Minimal Design
   Primary Color: #225ACC
   ============================================ */

/* ---- CSS Variables ---- */
:root {
    --primary: #225ACC;
    --primary-light: #3B7ADD;
    --primary-dark: #1A4599;
    --primary-50: #EEF4FF;
    --primary-100: #D4E2FF;
    --primary-200: #A8C4FF;
    --primary-300: #7CA6FF;
    --primary-400: #5088FF;

    --secondary: #6C757D;
    --secondary-light: #8E979F;
    --secondary-dark: #495057;

    --success: #28A745;
    --success-light: #D4EDDA;
    --success-dark: #1E7E34;

    --danger: #DC3545;
    --danger-light: #F8D7DA;
    --danger-dark: #BD2130;

    --warning: #FFC107;
    --warning-light: #FFF3CD;
    --warning-dark: #D39E00;

    --info: #17A2B8;
    --info-light: #D1ECF1;

    --text-primary: #2D3436;
    --text-secondary: #636E72;
    --text-muted: #B2BEC3;
    --text-light: #FFFFFF;

    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #EEF4FF;
    --bg-dark: #2D3436;

    --border: #E1E8ED;
    --border-light: #F0F2F5;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --font-primary: 'IRANSans', 'Vazirmatn', 'Tahoma', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --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;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    --max-width: 1280px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--text-primary);
    background: var(--bg-primary);
    direction: rtl;
    text-align: right;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

ul, ol {
    list-style: none;
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* ---- Container ---- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn:focus-visible {
    outline: 3px solid var(--primary-200);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-light);
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--text-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--text-light);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--primary);
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--primary-50);
}

.btn-sm {
    padding: 8px 18px;
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: 16px 36px;
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ---- Header / Navbar ---- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    height: var(--header-height);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-logo img {
    height: 48px;
    width: auto;
}

.header-logo-text {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--primary);
}

/* ---- Navigation ---- */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: var(--primary-50);
}

/* ---- Mobile Menu Toggle ---- */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Hero Section ---- */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--bg-primary) 50%, var(--primary-50) 100%);
    position: relative;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(34,90,204,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(34,90,204,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.hero-title span {
    color: var(--primary);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.9;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---- Hero Stats ---- */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.hero-stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: 6px;
}

/* ---- Sections ---- */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: 12px;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    margin: 12px auto 0;
}

.section-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section-bg-alt {
    background: var(--bg-secondary);
}

.section-bg-primary {
    background: var(--primary-50);
}

/* ---- Services Grid ---- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.service-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 3px;
    height: 0;
    background: var(--primary);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-100);
}

.service-card:hover::before {
    height: 100%;
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-50);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--primary);
    color: var(--text-light);
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.service-desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ---- Slider (Services > 6) ---- */
.services-slider-wrapper {
    position: relative;
    overflow: hidden;
}

.services-slider {
    display: flex;
    gap: 24px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 10px 0;
}

.services-slider .service-card {
    min-width: calc(33.333% - 16px);
    flex-shrink: 0;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary);
    transition: var(--transition);
    z-index: 2;
}

.slider-btn:hover {
    background: var(--primary);
    color: var(--text-light);
    border-color: var(--primary);
}

.slider-btn-next { left: -20px; }
.slider-btn-prev { right: -20px; }

/* ---- Blog Cards ---- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.blog-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.blog-card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.05);
}

.blog-card-tag {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--primary);
    color: var(--text-light);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.blog-card-body {
    padding: 20px;
}

.blog-card-date {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-bottom: 8px;
}

.blog-card-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-excerpt {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ---- About Section ---- */
.about-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-tertiary);
    height: 400px;
}

.about-content h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: 20px;
}

.about-content p {
    font-size: var(--font-size-base);
    line-height: 2;
    margin-bottom: 16px;
}

/* ---- Contact Section ---- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    align-items: flex-start;
}

.contact-info-icon {
    width: 44px;
    height: 44px;
    background: var(--primary-50);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-info-label {
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: 4px;
}

.contact-info-value {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ---- Footer ---- */
.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-light);
}

.footer-text {
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-200);
    padding-right: 4px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: var(--transition);
    font-size: 1rem;
}

.footer-social a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.5);
}

/* ---- Appointment Modal ---- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    padding: 24px 28px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--danger-light);
    color: var(--danger);
}

.modal-body {
    padding: 28px;
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ---- Forms ---- */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-50);
}

.form-control.error {
    border-color: var(--danger);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: left 12px center;
    background-size: 16px;
    padding-left: 40px;
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--danger);
    margin-top: 4px;
    display: none;
}

.form-control.error ~ .form-error {
    display: block;
}

/* ---- Status Messages ---- */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: var(--success-light);
    color: var(--success-dark);
    border: 1px solid var(--success);
}

.alert-error {
    background: var(--danger-light);
    color: var(--danger-dark);
    border: 1px solid var(--danger);
}

.alert-warning {
    background: var(--warning-light);
    color: var(--warning-dark);
    border: 1px solid var(--warning);
}

.alert-info {
    background: var(--info-light);
    color: var(--info);
    border: 1px solid var(--info);
}

/* ---- Breadcrumb ---- */
.breadcrumb {
    padding: 20px 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb-list li:not(:last-child)::after {
    content: '/';
    color: var(--text-muted);
    font-size: var(--font-size-xs);
}

.breadcrumb-list a {
    color: var(--text-muted);
}

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

.breadcrumb-list span {
    color: var(--text-primary);
    font-weight: 500;
}

/* ---- Pagination ---- */
.pagination {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.pagination ul {
    display: flex;
    gap: 6px;
}

.pagination a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

.pagination a:hover,
.pagination .active a {
    background: var(--primary);
    color: var(--text-light);
    border-color: var(--primary);
}

.pagination .active a {
    cursor: default;
    pointer-events: none;
}

/* ---- Skeleton Loading ---- */
.skeleton {
    background: linear-gradient(90deg, var(--border-light) 25%, var(--bg-secondary) 50%, var(--border-light) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeletonShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
}

.skeleton-image {
    height: 200px;
    width: 100%;
}

.skeleton-body {
    padding: 20px;
}

.skeleton-line {
    height: 12px;
    margin-bottom: 10px;
    width: 100%;
}

.skeleton-line:last-child {
    width: 60%;
}

.skeleton-line-sm {
    height: 10px;
    width: 40%;
    margin-bottom: 16px;
}

.skeleton-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    margin-bottom: 18px;
}

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.empty-state-text {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* ---- Countdown / Timer ---- */
.timer-container {
    text-align: center;
    padding: 20px;
}

.timer-display {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary);
    margin: 20px 0;
    direction: ltr;
    font-family: monospace;
}

.timer-text {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.timer-fallback {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.timer-fallback a {
    color: var(--primary);
    text-decoration: underline;
}

/* ---- Back to Top ---- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--text-light);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ---- Loading Spinner ---- */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 40px auto;
}

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

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .services-slider .service-card {
        min-width: calc(50% - 12px);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --header-height: 64px;
    }

    .header-inner {
        padding: 0 16px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        width: 100%;
        padding: 12px 16px;
    }

    .hero {
        padding: 100px 0 50px;
        min-height: auto;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
        margin-top: 40px;
    }

    .section {
        padding: 50px 0;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .services-slider .service-card {
        min-width: calc(100% - 10px);
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .about-section {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .slider-btn {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .slider-btn-next { left: -10px; }
    .slider-btn-prev { right: -10px; }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.6rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .modal {
        max-width: 100%;
        border-radius: var(--radius-md);
    }
}