/* /assets/css/landing.css */
:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-light: #334155;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', system-ui, sans-serif; }

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

/* Navigation */
.navbar { display: flex; justify-content: space-between; align-items: center; padding: 24px 5%; background: rgba(15, 23, 42, 0.9); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border-light); }
.nav-brand { font-size: 1.5rem; font-weight: 700; color: #ffffff; display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { color: var(--text-main); text-decoration: none; font-weight: 500; transition: var(--transition); }
.nav-links a:hover { color: var(--primary); }

/* Buttons */
.btn { padding: 12px 28px; border-radius: 8px; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); border: none; text-decoration: none; font-size: 1rem; }
.btn-primary { background: var(--primary); color: #ffffff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: rgba(59, 130, 246, 0.1); }

/* Hero Section */
.hero { padding: 120px 5%; text-align: center; max-width: 900px; margin: 0 auto; }
.badge { background: rgba(59, 130, 246, 0.1); color: var(--primary); padding: 8px 16px; border-radius: 30px; font-size: 0.875rem; font-weight: 600; display: inline-block; margin-bottom: 24px; border: 1px solid rgba(59, 130, 246, 0.2); }
.hero h1 { font-size: 3.5rem; line-height: 1.2; margin-bottom: 24px; font-weight: 800; background: linear-gradient(to right, #ffffff, #94a3b8); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 1.25rem; color: var(--text-muted); margin-bottom: 40px; }

/* Grid Layouts */
.section { padding: 80px 5%; }
.section-title { text-align: center; font-size: 2.5rem; margin-bottom: 16px; }
.section-subtitle { text-align: center; color: var(--text-muted); margin-bottom: 60px; max-width: 600px; margin-left: auto; margin-right: auto; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; max-width: 1200px; margin: 0 auto; }

/* Cards */
.card { background: var(--bg-card); padding: 40px; border-radius: var(--radius-lg); border: 1px solid var(--border-light); transition: var(--transition); }
.card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5); }
.card-icon { font-size: 32px; color: var(--primary); margin-bottom: 24px; }
.card h3 { font-size: 1.5rem; margin-bottom: 16px; }
.card p { color: var(--text-muted); margin-bottom: 24px; }

/* Donation Section */
.donation-wrapper { background: linear-gradient(145deg, var(--bg-card), #0f172a); border-radius: var(--radius-lg); padding: 60px 40px; text-align: center; max-width: 800px; margin: 0 auto; border: 1px solid var(--border-light); }
.donation-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; margin-top: 32px; }

/* Footer */
footer { text-align: center; padding: 40px 5%; border-top: 1px solid var(--border-light); margin-top: 80px; color: var(--text-muted); }

/* --- MOBILE RESPONSIVENESS: LANDING PAGE --- */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 16px;
        padding: 16px;
        text-align: center;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }
    .hero {
        padding: 60px 5% 40px;
    }
    .hero h1 {
        font-size: 2.2rem;
    }
    .hero p {
        font-size: 1.1rem;
        margin-bottom: 24px;
    }
    .section {
        padding: 40px 5%;
    }
    .section-title {
        font-size: 2rem;
    }
    .donation-grid {
        grid-template-columns: 1fr;
    }
    
    /* Receipt Mobile Adjustments */
    .receipt-container {
        padding: 24px;
        margin: 20px 5%;
    }
    .receipt-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        margin-bottom: 20px;
    }
    .receipt-value {
        font-size: 1.3rem;
    }
    .verify-card {
        padding: 30px 20px;
    }
}