@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

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

:root {
    --ink: #0f172a;
    --ink-2: #1e293b;
    --ink-3: #334155;
    --gray: #64748b;
    --gray-lt: #94a3b8;
    --border: #e2e8f0;
    --border-lt: #f1f5f9;
    --bg: #ffffff;
    --bg-page: #f8fafc;
    --bg-card: #ffffff;
    --blue: #2563eb;
    --blue-dk: #1d4ed8;
    --blue-bg: #eff6ff;
    --blue-glow: rgba(37,99,235,0.08);
    --green: #059669;
    --green-bg: #ecfdf5;
    --amber: #d97706;
    --amber-bg: #fffbeb;
    --violet: #7c3aed;
    --violet-bg: #f5f3ff;
    --rose: #e11d48;
    --rose-bg: #fff1f2;
    --teal: #0d9488;
    --teal-bg: #f0fdfa;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 30px -8px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 50px -12px rgba(0,0,0,0.12);
    --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

/* ═══════ NAVBAR ═══════ */
.nav {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    max-width: 1200px; margin: 0 auto;
    height: 64px;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px;
}
.nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-icon {
    width: 34px; height: 34px;
    background: var(--blue);
    border-radius: 9px;
    display: grid; place-items: center;
    box-shadow: 0 2px 8px rgba(37,99,235,0.25);
}
.nav-icon svg { width: 18px; height: 18px; }
.nav-name { font-size: 17px; font-weight: 700; color: var(--ink); letter-spacing: -0.3px; }
.nav-center { display: flex; align-items: center; gap: 4px; }
.nav-center a {
    text-decoration: none;
    font-size: 14px; font-weight: 500;
    color: var(--gray);
    padding: 8px 14px;
    border-radius: 8px;
    transition: all 0.15s;
}
.nav-center a:hover, .nav-center a.active { color: var(--ink); background: var(--bg-page); }
.nav-right { display: flex; align-items: center; gap: 8px; }
.btn-signin {
    font-size: 14px; font-weight: 600;
    color: var(--gray);
    padding: 8px 16px;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.15s;
    border: 1px solid transparent;
}
.btn-signin:hover { color: var(--ink); background: var(--bg-page); }
.btn-cta-sm {
    font-size: 14px; font-weight: 600;
    color: #fff;
    background: var(--blue);
    padding: 8px 18px;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.15s;
    border: none;
}
.btn-cta-sm:hover { background: var(--blue-dk); }
.mob-toggle {
    display: none;
    background: none; border: none; cursor: pointer; padding: 6px;
}
.mob-toggle svg { width: 24px; height: 24px; color: var(--ink); }

/* ═══════ BUTTONS ═══════ */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 28px; border-radius: 10px;
    font-size: 15px; font-weight: 600;
    text-decoration: none; border: none; cursor: pointer;
    font-family: var(--font); transition: all 0.2s;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dk); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: var(--bg); color: var(--ink); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--bg-page); border-color: #cbd5e1; }

/* ═══════ CARDS ═══════ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.25s;
}
.card:hover {
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}
.card-elevated {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

/* ═══════ SECTION UTILS ═══════ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }
.sec-label {
    display: inline-block;
    font-size: 12px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--blue);
    background: var(--blue-bg);
    padding: 4px 12px;
    border-radius: 6px;
    margin-bottom: 16px;
}
.sec-title {
    font-size: clamp(28px, 3.5vw, 42px);
    font-weight: 800; color: var(--ink);
    letter-spacing: -1px; line-height: 1.15;
    margin-bottom: 12px;
}
.sec-desc { font-size: 17px; color: var(--gray); line-height: 1.65; max-width: 540px; }

/* ═══════ ICON BOX ═══════ */
.icon-box {
    width: 44px; height: 44px;
    border-radius: 10px;
    display: grid; place-items: center;
}
.icon-box svg { width: 22px; height: 22px; }
.icon-box.blue { background: var(--blue-bg); color: var(--blue); }
.icon-box.green { background: var(--green-bg); color: var(--green); }
.icon-box.amber { background: var(--amber-bg); color: var(--amber); }
.icon-box.violet { background: var(--violet-bg); color: var(--violet); }
.icon-box.rose { background: var(--rose-bg); color: var(--rose); }
.icon-box.teal { background: var(--teal-bg); color: var(--teal); }

/* ═══════ FOOTER ═══════ */
.footer { background: var(--bg); border-top: 1px solid var(--border); padding: 48px 0 24px; }
.ft-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}
.ft-brand p { font-size: 14px; color: var(--gray); margin-top: 12px; line-height: 1.6; max-width: 280px; }
.ft-col h5 { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink); margin-bottom: 14px; }
.ft-col a { display: block; font-size: 14px; color: var(--gray); text-decoration: none; padding: 4px 0; transition: color 0.15s; }
.ft-col a:hover { color: var(--ink); }
.ft-bottom {
    margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border);
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.ft-bottom p { font-size: 12px; color: var(--gray-lt); }

/* ═══════ PAGE HEADER ═══════ */
.page-header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 64px 0 48px;
    text-align: center;
}
.page-header h1 {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800; color: var(--ink);
    letter-spacing: -1px; margin-bottom: 12px;
}
.page-header p { font-size: 18px; color: var(--gray); max-width: 520px; margin: 0 auto; }

/* ═══════ PROSE ═══════ */
.prose { max-width: 680px; margin: 0 auto; }
.prose h2 { font-size: 24px; font-weight: 700; color: var(--ink); margin: 40px 0 12px; }
.prose h3 { font-size: 18px; font-weight: 700; color: var(--ink); margin: 28px 0 8px; }
.prose p { font-size: 16px; color: var(--gray); line-height: 1.75; margin-bottom: 16px; }
.prose ul, .prose ol { margin: 12px 0 16px 24px; }
.prose li { font-size: 16px; color: var(--gray); line-height: 1.75; margin-bottom: 8px; }
.prose a { color: var(--blue); text-decoration: underline; }

/* ═══════ ANIMATIONS ═══════ */
@keyframes fadeIn { from { opacity:0; transform:translateY(14px); } to { opacity:1; transform:translateY(0); } }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.3} }
.reveal { opacity:0; transform:translateY(14px); transition: all 0.5s cubic-bezier(.16,1,.3,1); }
.reveal.visible { opacity:1; transform:translateY(0); }

/* ═══════ RESPONSIVE ═══════ */
@media(max-width:900px) {
    .nav-center, .nav-right { display: none; }
    .nav-center.open, .nav-right.open {
        display: flex; flex-direction: column;
        position: absolute; top: 64px; left: 0; right: 0;
        background: #fff; padding: 16px 24px; gap: 4px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
    }
    .nav-right.open { top: auto; border-top: 1px solid var(--border); padding-top: 12px; }
    .mob-toggle { display: block; }
    .ft-grid { grid-template-columns: 1fr 1fr; }
    .ft-bottom { flex-direction: column; text-align: center; }
}
@media(max-width:640px) {
    .ft-grid { grid-template-columns: 1fr; gap: 32px; }
    .section { padding: 56px 0; }
}