/* tracker.css - Modern Minimalist Design */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-primary: #3b82f6;
    --accent-secondary: #10b981;
    --border-color: #e2e8f0;
    --shadow: 0 10px 25px rgba(0,0,0,0.08);
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #60a5fa;
    --accent-secondary: #34d399;
    --border-color: #334155;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.alert-banner {
    background: var(--gradient);
    padding: 1rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.alert-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

#off {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 500;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header {
    padding: 1.5rem 2rem;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
}

[data-theme="dark"] .header {
    background: rgba(15, 23, 42, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

#logo {
    height: 40px;
    width: auto;
    transition: transform 0.2s ease;
}

#logo:hover {
    transform: scale(1.05);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    transition: all 0.2s ease;
    font-size: 0.95rem;
    position: relative;
    backdrop-filter: blur(10px);
}

.nav-link:hover {
    background: rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.support-link {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.donors-link {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.theme-toggle {
    background: var(--accent-secondary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.cta-button {
    display: inline-block;
    background: var(--gradient);
    color: white;
    padding: 1.5rem 3rem;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
    box-shadow: var(--shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    border: 2px solid transparent;
}

.cta-button:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(102, 126, 234, 0.4);
    border-color: rgba(255,255,255,0.3);
}

.cta-highlight {
    display: block;
    font-size: 1.5em;
    font-weight: 800;
    text-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
        padding-top: 1rem;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }
    
    .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .hero-section {
        padding: 1rem;
        text-align: center;
    }
    
    .hero-title {
        margin-bottom: 2rem;
    }
    
    .cta-button {
        padding: 1.25rem 2.5rem;
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 1rem;
    }
    
    .alert-banner {
        padding: 0.75rem 1rem;
    }
    
    #off {
        font-size: 0.85rem;
    }
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.nav-link:focus,
.theme-toggle:focus,
.cta-button:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}