/* ============================================
   Side Swing Landing Page
   Colors: Emerald #10B981, Amber #F59E0B, Slate #0F172A
   ============================================ */

:root {
    --emerald: #10B981;
    --emerald-dark: #059669;
    --emerald-light: #34D399;
    --amber: #F59E0B;
    --amber-dark: #D97706;
    --slate-900: #0F172A;
    --slate-800: #1E293B;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-400: #94A3B8;
    --slate-300: #CBD5E1;
    --white: #FFFFFF;
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: var(--slate-900);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---- Nav ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(15, 23, 42, 0.8);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--white);
}

.nav-icon {
    font-size: 24px;
}

.nav-title {
    font-weight: 800;
    font-size: 18px;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--slate-400);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--white);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    cursor: pointer;
    padding: 8px;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn:not(.btn-outline):not(.btn-white) {
    background: var(--emerald);
    color: var(--white);
}

.btn:not(.btn-outline):not(.btn-white):hover {
    background: var(--emerald-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 1.5px solid rgba(255,255,255,0.2);
}

.btn-outline:hover {
    border-color: rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.05);
}

.btn-white {
    background: var(--white);
    color: var(--slate-900);
}

.btn-white:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(255,255,255,0.2);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
    border-radius: var(--radius-lg);
}

/* ---- Hero ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(16, 185, 129, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 20% 80%, rgba(245, 158, 11, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(16, 185, 129, 0.05), transparent);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 999px;
    color: var(--amber);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 32px;
}

.hero-icon-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 32px;
}

.hero-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    z-index: 2;
}

.hero-icon-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid rgba(16, 185, 129, 0.3);
    animation: pulse-ring 3s ease-in-out infinite;
}

@keyframes pulse-ring {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.15); opacity: 1; }
}

.hero h1 {
    font-size: clamp(40px, 7vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.text-emerald {
    color: var(--emerald);
}

.hero-sub {
    font-size: 18px;
    color: var(--slate-400);
    max-width: 540px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

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

.stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--emerald-light);
}

.stat-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--slate-400);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background: rgba(255,255,255,0.1);
}

.scroll-indicator {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--slate-600);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ---- Sections ---- */
.section {
    padding: 100px 0;
}

.section-dark {
    background: var(--slate-800);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 999px;
    color: var(--emerald);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 18px;
    color: var(--slate-400);
    max-width: 480px;
    margin: 0 auto;
}

/* ---- Steps ---- */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.step {
    text-align: center;
    padding: 40px 24px;
    background: var(--slate-800);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255,255,255,0.06);
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
}

.step:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.3);
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    background: var(--emerald);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 800;
}

.step-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.step h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.step p {
    font-size: 14px;
    color: var(--slate-400);
    line-height: 1.6;
}

/* ---- Features Grid ---- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    padding: 32px 24px;
    background: var(--slate-900);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.06);
    transition: transform 0.3s, border-color 0.3s;
}

.feature-card:hover {
    transform: translateY(-2px);
    border-color: rgba(16, 185, 129, 0.3);
}

.feature-card-accent {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.05));
    border-color: rgba(16, 185, 129, 0.2);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 13px;
    color: var(--slate-400);
    line-height: 1.6;
}

/* ---- Courses Grid ---- */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.course-card {
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--slate-800);
    border: 1px solid rgba(255,255,255,0.06);
    transition: transform 0.3s, box-shadow 0.3s;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
}

.course-header {
    position: relative;
    padding: 48px 24px 24px;
    overflow: hidden;
}

.course-header.northwestern {
    background: linear-gradient(135deg, #4B0082 0%, #1E293B 100%);
}

.course-header.loyola {
    background: linear-gradient(135deg, #800000 0%, #1E293B 100%);
}

.course-header.grant-park {
    background: linear-gradient(135deg, #006994 0%, #1E293B 100%);
}

.course-header.lincoln-park {
    background: linear-gradient(135deg, #228B22 0%, #1E293B 100%);
}

.course-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(30, 41, 59, 0.8) 100%);
}

.course-info {
    position: relative;
    z-index: 2;
}

.course-badge {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(255,255,255,0.15);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 8px;
}

.course-info h3 {
    font-size: 24px;
    font-weight: 800;
}

.course-info p {
    font-size: 13px;
    color: var(--slate-300);
    margin-top: 2px;
}

.course-holes {
    padding: 16px 20px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.hole-tag {
    padding: 4px 10px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.15);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 500;
    color: var(--emerald-light);
}

/* ---- Modes Grid ---- */
.modes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.mode-card {
    padding: 40px 28px;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255,255,255,0.06);
    background: var(--slate-900);
    text-align: center;
    transition: transform 0.3s;
}

.mode-card:hover {
    transform: translateY(-4px);
}

.mode-a {
    border-color: rgba(16, 185, 129, 0.3);
    background: linear-gradient(180deg, rgba(16, 185, 129, 0.08) 0%, var(--slate-900) 100%);
}

.mode-b {
    border-color: rgba(56, 189, 248, 0.3);
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.08) 0%, var(--slate-900) 100%);
}

.mode-c {
    border-color: rgba(245, 158, 11, 0.3);
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.08) 0%, var(--slate-900) 100%);
}

.mode-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.mode-a .mode-badge { background: rgba(16,185,129,0.15); color: var(--emerald); }
.mode-b .mode-badge { background: rgba(56,189,248,0.15); color: #38BDF8; }
.mode-c .mode-badge { background: rgba(245,158,11,0.15); color: var(--amber); }

.mode-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.mode-card h3 {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 4px;
}

.mode-requires {
    font-size: 13px;
    color: var(--slate-400);
    margin-bottom: 20px;
}

.mode-card ul {
    list-style: none;
    text-align: left;
}

.mode-card li {
    padding: 6px 0;
    font-size: 14px;
    color: var(--slate-300);
    display: flex;
    align-items: center;
    gap: 8px;
}

.mode-card li::before {
    content: '✓';
    color: var(--emerald);
    font-weight: 700;
    font-size: 12px;
}

/* ---- CTA Section ---- */
.section-cta {
    background: linear-gradient(180deg, var(--slate-900) 0%, var(--emerald-dark) 100%);
    text-align: center;
    padding: 120px 0;
}

.cta-content {
    max-width: 560px;
    margin: 0 auto;
}

.cta-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.cta-content h2 {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-content > p {
    font-size: 18px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 32px;
}

.cta-note {
    margin-top: 16px;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* ---- Footer ---- */
.footer {
    background: var(--slate-900);
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 48px 0 32px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 32px;
}

.footer-logo {
    font-weight: 800;
    font-size: 16px;
    letter-spacing: 1px;
}

.footer-brand p {
    font-size: 13px;
    color: var(--slate-400);
    margin-top: 8px;
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--slate-400);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 20px;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--slate-600);
    text-align: center;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        padding: 16px 24px;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        gap: 16px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero-sub {
        font-size: 16px;
    }

    .hero-stats {
        gap: 20px;
    }

    .stat-value {
        font-size: 22px;
    }

    .steps {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

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

    .modes-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 24px;
    }

    .footer-links {
        flex-direction: column;
        gap: 12px;
    }

    .section {
        padding: 64px 0;
    }

    .section-cta {
        padding: 80px 0;
    }

    .cta-content h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ---- Animations ---- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}