:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #818cf8;
    --primary-hover: #6366f1;
    --secondary: #38bdf8;
    --accent: #c084fc;
    --border: #334155;
    --font-main: 'Outfit', sans-serif;
    --spacing: 1rem;
    --radius: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.site-header {
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.main-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
}

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

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    border: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.btn-secondary:hover {
    border-color: var(--text-main);
    color: var(--text-main);
}

.btn-block {
    width: 100%;
    text-align: center;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Hero */
.hero {
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(to right, var(--secondary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    position: relative;
    height: 400px;
}

.glow-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    filter: blur(60px);
    opacity: 0.5;
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Sponsors */
.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.sponsor-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease;
}

.sponsor-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.sponsor-logo {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
    padding: 1rem;
}

.sponsor-logo img {
    max-height: 100%;
    max-width: 100%;
}

.sponsor-link {
    color: var(--secondary);
    font-weight: 600;
    margin-top: 1rem;
    display: inline-block;
}

/* Clinics */
.search-bar-container {
    max-width: 600px;
    margin: 0 auto 3rem;
}

.search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: 50px;
    border: 2px solid var(--border);
    background: var(--bg-card);
    color: var(--text-main);
    font-size: 1.1rem;
    transition: border-color 0.3s ease;
}

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

.clinics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.clinic-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.clinic-header {
    margin-bottom: 1rem;
}

.clinic-header h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.location-badge {
    background: rgba(56, 189, 248, 0.1);
    color: var(--secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.clinic-body {
    color: var(--text-muted);
    font-size: 0.95rem;
    flex-grow: 1;
}

.website-link {
    display: block;
    margin-top: 1rem;
    color: var(--primary);
}

/* Add Clinic Form */
.form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 3rem;
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modern-form .form-group {
    margin-bottom: 1.5rem;
}

.modern-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.modern-form input,
.modern-form textarea {
    width: 100%;
    padding: 0.75rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
}

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

.form-row {
    display: flex;
    gap: 1rem;
}

.form-group.half {
    flex: 1;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
    margin-top: 6rem;
    background: var(--bg-card);
}

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

.footer-col h3 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.footer-col h4 {
    margin-bottom: 1.5rem;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
}

.footer-col a:hover {
    color: var(--text-main);
}

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    font-size: 0.9rem;
}

/* Mobile */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-text p {
        margin: 0 auto 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* ========================================
   AD SYSTEM STYLES
   ======================================== */

/* Ad Zone Containers */
.ads-zone {
    margin: 2rem 0;
}

.ads-zone-homepage {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
}

.ads-zone-sidebar {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    position: sticky;
    top: 100px;
}

.ads-zone-inline {
    margin: 2rem 0;
}

.ads-zone-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    margin-top: 3rem;
}

/* Sponsor/Business Showcase Cards */
.ad-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.ad-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
}

.ad-sponsor {
    text-align: center;
}

.ad-logo {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 1rem;
}

.ad-logo img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.ad-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.ad-description {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.ad-link {
    color: var(--secondary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.ad-link:hover {
    color: var(--primary);
}

/* Banner Ads */
.ad-banner {
    margin: 1rem 0;
    text-align: center;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius);
    overflow: hidden;
}

.ad-banner-link {
    display: inline-block;
    transition: opacity 0.3s ease;
}

.ad-banner-link:hover {
    opacity: 0.9;
}

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

/* Standard Banner Sizes */
.ad-size-leaderboard {
    max-width: 728px;
    margin-left: auto;
    margin-right: auto;
}

.ad-size-leaderboard .ad-banner-img {
    width: 728px;
    height: 90px;
}

.ad-size-medium {
    max-width: 300px;
}

.ad-size-medium .ad-banner-img {
    width: 300px;
    height: 250px;
}

.ad-size-skyscraper {
    max-width: 160px;
}

.ad-size-skyscraper .ad-banner-img {
    width: 160px;
    height: 600px;
}

.ad-size-mobile {
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
}

.ad-size-mobile .ad-banner-img {
    width: 320px;
    height: 50px;
}

.ad-size-responsive {
    width: 100%;
}

.ad-size-responsive .ad-banner-img {
    width: 100%;
    height: auto;
}

/* HTML/Code Ads */
.ad-html {
    margin: 1rem 0;
    text-align: center;
}

/* Ad Grid Layouts */
.ads-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.ads-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.ads-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

/* Sponsored Label */
.ad-sponsored-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    text-align: center;
}

/* Homepage Premium Sponsors (existing styles enhanced) */
.sponsors-section {
    padding: 5rem 0;
    background: linear-gradient(to bottom, transparent, rgba(99, 102, 241, 0.03), transparent);
}

/* Ad Section Title */
.ad-section-title {
    text-align: center;
    margin-bottom: 2rem;
}

.ad-section-title h3 {
    font-size: 1.5rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.ad-section-title p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Mobile Responsive Ads */
@media (max-width: 768px) {
    .ads-grid-2,
    .ads-grid-3,
    .ads-grid-4 {
        grid-template-columns: 1fr;
    }
    
    .ad-size-leaderboard .ad-banner-img {
        width: 100%;
        height: auto;
        max-width: 728px;
    }
    
    .ad-size-skyscraper {
        max-width: 100%;
    }
    
    .ad-size-skyscraper .ad-banner-img {
        width: 100%;
        height: auto;
        max-width: 160px;
    }
    
    .ads-zone-sidebar {
        position: static;
        margin: 2rem 0;
    }
}

/* Footer Ad Area */
.footer-ads {
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
    padding: 3rem 0;
    margin-top: 2rem;
}

.footer-ads .container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}