/* ============================================
   COURSEGUARD — Premium Dark Theme
   ============================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --green: #50b685;
    --green-light: #68c99b;
    --green-dark: #3d9a6e;
    --green-bg: rgba(80,182,133,.1);
    --green-border: rgba(80,182,133,.2);
    --accent: #68c99b;
    --accent-dim: rgba(104,201,155,.1);
    --bg: #0a0f0d;
    --bg-alt: #0f1614;
    --bg-card: #121c18;
    --bg-elevated: #162420;
    --border: rgba(255,255,255,.06);
    --border-light: rgba(255,255,255,.1);
    --text: #f0f0ec;
    --text-secondary: #8a9a92;
    --radius: 14px;
    --radius-lg: 20px;
    --sans: 'DM Sans', -apple-system, sans-serif;
    --serif: 'DM Serif Display', Georgia, serif;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);
    --shadow-md: 0 4px 16px rgba(0,0,0,.4), 0 1px 3px rgba(0,0,0,.3);
    --shadow-lg: 0 10px 40px rgba(0,0,0,.5), 0 2px 8px rgba(0,0,0,.3);
    --shadow-xl: 0 20px 60px rgba(0,0,0,.6), 0 4px 16px rgba(0,0,0,.4);
    --glow-sm: 0 0 20px rgba(80,182,133,.15);
    --glow-md: 0 0 40px rgba(80,182,133,.12);
    --glow-lg: 0 0 60px rgba(80,182,133,.1);
}

html { scroll-behavior: smooth; }
body { font-family: var(--sans); background: var(--bg); color: var(--text); line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

a { color: var(--green); text-decoration: none; }

/* ---- NAV ---- */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(10,15,13,.7); backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border);
    transition: box-shadow .3s, background .3s;
}
.nav.scrolled { background: rgba(10,15,13,.92); box-shadow: 0 1px 20px rgba(0,0,0,.4), var(--glow-sm); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }

.logo {
    font-family: var(--sans); font-weight: 700; font-size: 1.15rem;
    color: var(--text); letter-spacing: -.3px;
    display: flex; align-items: center; gap: 8px;
}
.logo::before {
    content: ''; display: block; width: 28px; height: 28px; border-radius: 8px;
    background: linear-gradient(135deg, var(--green), var(--accent));
    box-shadow: 0 2px 12px rgba(80,182,133,.4), 0 0 20px rgba(80,182,133,.15);
}

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--text-secondary); font-size: .875rem; font-weight: 500; transition: color .2s; position: relative; }
.nav-links a:not(.nav-btn):hover { color: var(--text); }
.nav-links a:not(.nav-btn)::after {
    content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
    height: 2px; background: linear-gradient(90deg, var(--green), var(--accent));
    border-radius: 1px; transform: scaleX(0); transition: transform .25s ease;
}
.nav-links a:not(.nav-btn):hover::after { transform: scaleX(1); }

.nav-btn {
    background: linear-gradient(135deg, var(--green-dark), var(--green)) !important;
    color: #0a0f0d !important; font-weight: 700 !important;
    padding: 9px 20px; border-radius: 10px;
    transition: transform .2s, box-shadow .2s !important;
    box-shadow: 0 2px 12px rgba(80,182,133,.3), var(--glow-sm);
}
.nav-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(80,182,133,.45), var(--glow-md) !important; }

.burger { display: none; background: none; border: none; cursor: pointer; padding: 6px; flex-direction: column; gap: 5px; }
.burger span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s; }

/* ---- BUTTONS ---- */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 32px; border-radius: 12px;
    background: linear-gradient(135deg, var(--green-dark), var(--green));
    color: #0a0f0d;
    font-family: var(--sans); font-weight: 700; font-size: .95rem;
    border: none; cursor: pointer;
    transition: transform .2s, box-shadow .2s;
    box-shadow: 0 4px 20px rgba(80,182,133,.35), var(--glow-sm);
    position: relative; overflow: hidden;
}
.btn::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,.2), transparent);
    opacity: 0; transition: opacity .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(80,182,133,.4), var(--glow-md); color: #0a0f0d; }
.btn:hover::before { opacity: 1; }
.w-full { width: 100%; }

.btn-text { color: var(--text-secondary); font-weight: 500; font-size: .95rem; transition: color .2s, gap .2s; display: inline-flex; align-items: center; gap: 4px; }
.btn-text:hover { color: var(--green); gap: 8px; }

/* ---- SECTIONS ---- */
.section { padding: 100px 0; position: relative; }
.bg-alt { background: var(--bg-alt); }

.section-label {
    font-size: .7rem; font-weight: 700; letter-spacing: 2px;
    text-transform: uppercase; margin-bottom: 14px;
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 14px; border-radius: 100px;
    background: var(--green-bg); color: var(--green);
    border: 1px solid var(--green-border);
    box-shadow: var(--glow-sm);
}

h2 {
    font-family: var(--serif); font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 400; line-height: 1.15; margin-bottom: 20px; color: var(--text);
}

.center-text { text-align: center; max-width: 580px; margin-left: auto; margin-right: auto; }
.sub-text { color: var(--text-secondary); font-size: 1.05rem; line-height: 1.7; }

/* ---- HERO ---- */
.hero {
    padding: 140px 0 100px;
    background: linear-gradient(180deg, #0d1a14 0%, var(--bg) 60%);
    position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -300px; right: -200px;
    width: 700px; height: 700px; border-radius: 50%;
    background: radial-gradient(circle, rgba(80,182,133,.08) 0%, transparent 60%);
    pointer-events: none; animation: floatSlow 20s ease-in-out infinite;
}
.hero::after {
    content: ''; position: absolute; bottom: -150px; left: -200px;
    width: 500px; height: 500px; border-radius: 50%;
    background: radial-gradient(circle, rgba(80,182,133,.05) 0%, transparent 60%);
    pointer-events: none; animation: floatSlow 15s ease-in-out infinite reverse;
}

.hero-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
    position: relative; z-index: 1;
}
.hero-text h1 {
    font-family: var(--serif); font-size: clamp(2.2rem, 4.2vw, 3.2rem);
    font-weight: 400; line-height: 1.1; margin-bottom: 20px; color: var(--text);
}
.hero-text h1 span {
    background: linear-gradient(135deg, var(--green), var(--accent), var(--green-light));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-text > p {
    color: var(--text-secondary); font-size: 1.1rem; line-height: 1.7;
    margin-bottom: 32px; max-width: 460px;
}
.hero-btns { display: flex; align-items: center; gap: 20px; }

.hero-visual { display: flex; justify-content: center; align-items: center; }
#heroCanvas {
    width: 100%; max-width: 440px; aspect-ratio: 1;
    border-radius: 50%;
    border: 1px solid var(--green-border);
    background: radial-gradient(circle at center, rgba(80,182,133,.03) 0%, var(--bg-alt) 70%);
    box-shadow:
        0 0 0 1px var(--green-border),
        0 0 40px rgba(80,182,133,.08),
        0 0 80px rgba(80,182,133,.04),
        var(--shadow-xl);
}

/* ---- TRUST BAR ---- */
.trust-bar {
    border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
    background: var(--bg-alt); padding: 18px 0;
}
.trust-bar-inner { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 8px; font-size: .82rem; color: var(--text-secondary); font-weight: 500; }
.trust-item svg { flex-shrink: 0; }

/* ---- STEP CARDS (How It Works) ---- */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.scard {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 32px 28px; position: relative; overflow: hidden;
    transition: transform .3s, box-shadow .3s, border-color .3s;
}
.scard::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--green), var(--accent));
    opacity: 0; transition: opacity .3s;
}
.scard:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg), var(--glow-sm); border-color: var(--green-border); }
.scard:hover::before { opacity: 1; }
.scard-num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 50%;
    background: linear-gradient(135deg, var(--green-dark), var(--green));
    font-weight: 700; font-size: .85rem; color: #0a0f0d;
    margin-bottom: 18px;
    box-shadow: 0 2px 10px rgba(80,182,133,.35), var(--glow-sm);
}
.scard h3 { font-size: 1rem; font-weight: 600; margin-bottom: 10px; color: var(--text); }
.scard p { color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }

/* ---- BENEFIT CARDS ---- */
.benefit-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.bcard {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 30px; transition: transform .3s ease, box-shadow .3s ease, border-color .3s;
    position: relative; overflow: hidden;
}
.bcard::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--green), var(--accent), var(--green));
    opacity: 0; transition: opacity .3s;
}
.bcard:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg), var(--glow-sm); border-color: var(--green-border); }
.bcard:hover::before { opacity: 1; }
.bcard-icon {
    width: 46px; height: 46px; border-radius: 12px;
    background: var(--green-bg);
    border: 1px solid var(--green-border);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 18px;
    box-shadow: var(--glow-sm);
}
.bcard h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.bcard p { color: var(--text-secondary); font-size: .875rem; line-height: 1.7; }

/* ---- COMPARISON GRID ---- */
.compare-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 48px;
    max-width: 800px; margin-left: auto; margin-right: auto;
}
.compare-col {
    border-radius: var(--radius); padding: 32px 28px;
    border: 1px solid var(--border);
}
.compare-them {
    background: var(--bg-card);
}
.compare-us {
    background: var(--bg-card);
    border-color: var(--green-border);
    box-shadow: var(--glow-sm);
    position: relative; overflow: hidden;
}
.compare-us::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--green), var(--accent));
}
.compare-header {
    font-size: .8rem; font-weight: 700; letter-spacing: 1.5px;
    text-transform: uppercase; margin-bottom: 20px; padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.compare-them .compare-header { color: #ff6b6b; }
.compare-us .compare-header { color: var(--green); }
.compare-list {
    list-style: none; display: flex; flex-direction: column; gap: 16px;
}
.compare-list li {
    display: flex; align-items: flex-start; gap: 12px;
    font-size: .9rem; color: var(--text-secondary); line-height: 1.5;
}
.compare-list li svg { flex-shrink: 0; margin-top: 2px; }
.compare-us .compare-list li { color: var(--text); }

/* ---- CTA BANNER ---- */
.cta-banner {
    padding: 72px 0;
    background: linear-gradient(135deg, #0d1a14, #132a1f, #0d1a14);
    border-top: 1px solid var(--green-border);
    border-bottom: 1px solid var(--green-border);
    position: relative; overflow: hidden;
}
.cta-banner::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, rgba(80,182,133,.06) 0%, transparent 60%);
    pointer-events: none;
}
.cta-inner {
    display: flex; align-items: center; justify-content: space-between; gap: 40px;
    position: relative; z-index: 1;
}
.cta-text h2 {
    font-family: var(--serif); font-size: clamp(1.5rem, 3vw, 2.2rem);
    margin-bottom: 8px;
}
.cta-text p { color: var(--text-secondary); font-size: 1rem; margin: 0; }
.btn-lg { padding: 18px 40px; font-size: 1.05rem; white-space: nowrap; }

/* ---- FAQ ---- */
.faq-list { max-width: 700px; margin: 48px auto 0; display: flex; flex-direction: column; gap: 8px; }
.faq-item {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    overflow: hidden; transition: border-color .3s, box-shadow .3s;
}
.faq-item[open] { border-color: var(--green-border); box-shadow: var(--glow-sm); }
.faq-item summary {
    padding: 18px 24px; font-size: .95rem; font-weight: 600; color: var(--text);
    cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between;
    transition: color .2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '+'; font-size: 1.2rem; font-weight: 400; color: var(--green);
    transition: transform .3s;
}
.faq-item[open] summary::after { content: '\2212'; }
.faq-item summary:hover { color: var(--green); }
.faq-item p {
    padding: 0 24px 20px; font-size: .9rem; color: var(--text-secondary); line-height: 1.7;
}

/* ---- CONTACT META ---- */
.contact-meta { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--border); }
.contact-meta p { font-size: .85rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 0; }

/* ---- CONTACT ---- */
.contact-section {
    background: linear-gradient(135deg, #0d1a14 0%, var(--bg) 50%, #0d1510 100%);
    position: relative; overflow: hidden;
}
.contact-section::before {
    content: ''; position: absolute; top: -150px; right: -150px;
    width: 500px; height: 500px; border-radius: 50%;
    background: radial-gradient(circle, rgba(80,182,133,.06) 0%, transparent 60%);
    pointer-events: none;
}
.contact-section::after {
    content: ''; position: absolute; bottom: -100px; left: -100px;
    width: 400px; height: 400px; border-radius: 50%;
    background: radial-gradient(circle, rgba(80,182,133,.04) 0%, transparent 60%);
    pointer-events: none;
}
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; position: relative; z-index: 1; }
.contact-text p { color: var(--text-secondary); font-size: 1rem; line-height: 1.7; margin-bottom: 24px; }
.contact-text strong { color: var(--text); }

.checks { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.checks li {
    display: flex; align-items: center; gap: 12px;
    font-size: .9rem; color: var(--text); font-weight: 500;
}
.checks li::before {
    content: ''; flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%;
    background: var(--green-bg);
    border: 1px solid var(--green-border);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpolyline points='5 9 8 12 13 6' fill='none' stroke='%2350b685' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: center;
    box-shadow: var(--glow-sm);
}

.form {
    background: var(--bg-elevated); border: 1px solid var(--border-light); border-radius: var(--radius-lg);
    padding: 36px; display: flex; flex-direction: column; gap: 14px;
    box-shadow: var(--shadow-xl);
    position: relative; overflow: hidden;
}
.form::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, transparent, var(--green), var(--accent), var(--green), transparent);
    box-shadow: 0 0 20px rgba(80,182,133,.3);
}
.form h3 { font-family: var(--serif); font-size: 1.3rem; margin-bottom: 4px; color: var(--text); }
.form input, .form select, .form textarea {
    background: var(--bg); border: 1px solid var(--border-light); border-radius: 10px;
    padding: 12px 16px; font-family: var(--sans); font-size: .9rem; color: var(--text);
    outline: none; transition: border-color .2s, box-shadow .2s;
}
.form input::placeholder, .form textarea::placeholder { color: #5a6a62; }
.form input:focus, .form select:focus, .form textarea:focus {
    border-color: var(--green); box-shadow: 0 0 0 3px var(--green-bg), var(--glow-sm);
}
.form select {
    cursor: pointer; appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6' fill='%238a9a92'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 14px center;
}
.form textarea { resize: vertical; min-height: 80px; }

/* ---- FOOTER ---- */
.footer { padding: 56px 0 24px; border-top: 1px solid var(--border-light); background: var(--bg); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 36px; }
.footer .logo::before { width: 22px; height: 22px; border-radius: 6px; }
.footer-sub { color: var(--text-secondary); font-size: .85rem; line-height: 1.6; margin-top: 8px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--text-secondary); font-size: .85rem; transition: color .2s; }
.footer-links a:hover { color: var(--green); }
.footer-bar { border-top: 1px solid var(--border); padding-top: 16px; font-size: .8rem; color: #4a5a52; }

/* ---- REVEAL ANIMATION ---- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---- DECORATIVE ---- */
.section-divider {
    height: 1px; border: none; margin: 0;
    background: linear-gradient(90deg, transparent, var(--border-light), var(--green-border), var(--border-light), transparent);
}

.gradient-text {
    background: linear-gradient(135deg, var(--green), var(--accent), var(--green-light));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---- FLOATING DECORATIONS ---- */
.float-dot {
    position: absolute; border-radius: 50%; pointer-events: none;
    background: radial-gradient(circle, rgba(80,182,133,.12) 0%, transparent 70%);
}
.float-dot-1 { width: 400px; height: 400px; top: 10%; right: -100px; animation: floatSlow 20s ease-in-out infinite; }
.float-dot-2 { width: 300px; height: 300px; bottom: 5%; left: -80px; animation: floatSlow 15s ease-in-out infinite reverse; }

@keyframes floatSlow {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(10px, -20px); }
    50% { transform: translate(-5px, 10px); }
    75% { transform: translate(15px, 5px); }
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; }
    .hero-visual { order: -1; }
    #heroCanvas { max-width: 320px; }
    .hero-text { text-align: center; }
    .hero-text > p { margin-left: auto; margin-right: auto; }
    .hero-btns { justify-content: center; }
    .steps-grid { grid-template-columns: 1fr 1fr; }
    .benefit-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .trust-bar-inner { gap: 20px; }
    .compare-grid { max-width: 100%; }
    .cta-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 768px) {
    .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; background: rgba(10,15,13,.97); backdrop-filter: blur(24px); padding: 20px 24px; gap: 16px; border-bottom: 1px solid var(--border-light); }
    .nav-links.open { display: flex; }
    .burger { display: flex; }
    .section { padding: 72px 0; }
    .steps-grid { grid-template-columns: 1fr; }
    .benefit-grid { grid-template-columns: 1fr; }
    .trust-bar-inner { flex-direction: column; align-items: center; gap: 12px; }
    .compare-grid { grid-template-columns: 1fr; }
    .hero-btns { flex-direction: column; align-items: stretch; }
    .footer-inner { flex-direction: column; gap: 20px; }
}