:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --slate-900: #0F172A;
    --slate-800: #1E293B;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748B;
    --slate-400: #94A3B8;
    --slate-300: #CBD5E1;
    --slate-200: #E2E8F0;
    --slate-100: #F1F5F9;
    --slate-50: #F8FAFC;
    --dark: #0F172A;
    --gray: #64748B;
    --white: #FFFFFF;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--slate-800);
    background: var(--slate-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1 { font-size: 3rem; font-weight: 700; margin-bottom: 20px; letter-spacing: -0.02em; color: var(--slate-900); }
h2 { font-size: 2rem; font-weight: 700; margin-bottom: 20px; letter-spacing: -0.01em; color: var(--slate-900); }
h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 12px; color: var(--slate-900); }
p { margin-bottom: 16px; color: var(--slate-500); }

a { color: var(--primary); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--primary-dark); }

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

nav { position: sticky; top: 0; background: rgba(255,255,255,0.85); backdrop-filter: blur(12px); padding: 16px 0; border-bottom: 1px solid var(--slate-200); z-index: 100; }

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

.navbar-brand { display: flex; align-items: center; gap: 12px; }
.navbar-brand img { height: 100px; width: auto; }

.navbar-nav { display: flex; list-style: none; gap: 40px; align-items: center; }
.navbar-nav a { color: var(--slate-700); font-weight: 500; font-size: 0.95rem; }
.navbar-nav a:hover { color: var(--primary); }

.btn { padding: 12px 26px; border: none; border-radius: 0; font-weight: 500; font-size: 0.95rem; cursor: pointer; transition: all 0.15s; display: inline-flex; align-items: center; justify-content: center; gap: 8px; }

.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); color: var(--white); }

.btn-outline { background: transparent; border: 1px solid var(--slate-800); color: var(--slate-800); }
.btn-outline:hover { background: var(--slate-800); color: var(--white); }

.hero { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 72px 0; }
.hero-content h1 { color: var(--slate-900); }
.hero-content p { font-size: 1.1rem; color: var(--slate-500); max-width: 90%; }

.hero-visual { display: flex; align-items: center; justify-content: center; min-height: 320px; }
.hero-visual-placeholder { width: 100%; height: 100%; background: var(--slate-100); border: 1px solid var(--slate-200); display: flex; align-items: center; justify-content: center; }

.upload-zone { border: 1px dashed var(--primary); padding: 56px 40px; text-align: center; background: var(--slate-50); transition: all 0.15s; cursor: pointer; }
.upload-zone:hover { background: #EFF6FF; border-color: var(--primary-dark); }
.upload-zone-text { font-size: 1.1rem; font-weight: 500; color: var(--slate-900); margin-bottom: 6px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1px; background: var(--slate-200); border: 1px solid var(--slate-200); margin: 40px 0; }
.feature-card { background: var(--white); padding: 36px 28px; transition: background 0.15s; }
.feature-card:hover { background: var(--slate-50); }
.feature-card h3 { color: var(--slate-900); }
.feature-card p { color: var(--slate-500); font-size: 0.95rem; margin-bottom: 0; }

.icon { display: inline-flex; color: var(--primary); }
.icon svg { width: 28px; height: 28px; stroke: currentColor; stroke-width: 1.75; fill: none; }

footer { background: var(--slate-900); color: var(--white); padding: 56px 24px 40px; margin-top: 72px; }
.footer-content { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 40px; margin-bottom: 40px; }
.footer-section h4 { color: var(--white); margin-bottom: 14px; font-size: 0.95rem; font-weight: 600; }
.footer-section a { color: var(--slate-400); display: block; margin-bottom: 8px; font-size: 0.9rem; }
.footer-section a:hover { color: var(--white); }
.footer-bottom { text-align: center; padding-top: 32px; border-top: 1px solid var(--slate-700); color: var(--slate-400); font-size: 0.9rem; max-width: 1200px; margin: 0 auto; }

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    .hero { grid-template-columns: 1fr; gap: 32px; padding: 40px 0; }
    .navbar-brand img { height: 64px; }
    .navbar-nav { gap: 20px; }
}