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

:root {
    --bg: #0a0a0a;
    --surface: #141414;
    --border: #262626;
    --text: #e5e5e5;
    --text-muted: #737373;
    --accent: #22c55e;
    --accent-dark: #16a34a;
    --gradient: linear-gradient(135deg, #22c55e 0%, #059669 50%, #0d9488 100%);
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.container { max-width: 800px; margin: 0 auto; padding: 0 20px; }

/* Nav */
nav {
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10,10,10,0.9);
}
.nav-inner { display: flex; align-items: center; gap: 12px; }
.logo {
    font-size: 1.3rem;
    font-weight: 800;
    text-decoration: none;
    color: var(--text);
}
.tagline { color: var(--text-muted); font-size: 0.9rem; }

/* Hero */
.hero { text-align: center; padding: 60px 0 40px; }
h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.1; margin-bottom: 16px; }
h1 span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.subtitle { font-size: 1.15rem; color: var(--text-muted); max-width: 600px; margin: 0 auto 20px; }
.price-tag {
    display: inline-block;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 8px 20px;
    border-radius: 50px;
    font-weight: 600;
    color: var(--accent);
}

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 40px 0; }
.feature {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: border-color 0.2s;
}
.feature:hover { border-color: var(--accent); }
.feature .icon { font-size: 2rem; margin-bottom: 12px; }
.feature h3 { font-size: 1rem; margin-bottom: 6px; }
.feature p { font-size: 0.85rem; color: var(--text-muted); }

/* Upload */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--surface);
    margin: 20px 0;
}
.upload-area:hover, .upload-area.dragover { border-color: var(--accent); background: rgba(34,197,94,0.05); }
.upload-icon { font-size: 3rem; margin-bottom: 12px; }
.upload-area h3 { margin-bottom: 8px; }
.upload-area p { color: var(--text-muted); font-size: 0.9rem; }

.file-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    margin: 20px 0;
}

/* Payment */
.payment-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    margin: 20px 0;
    text-align: center;
}
.payment-section h3 { margin-bottom: 8px; }
.payment-desc { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 20px; }
#card-element {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 16px;
}

/* Button */
.btn {
    background: var(--gradient);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
    font-family: inherit;
}
.btn:hover { opacity: 0.9; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Results */
.results-section { margin: 40px 0; }
.results-section h2 { text-align: center; margin-bottom: 24px; font-size: 1.6rem; }
.result-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
}
.result-card h3 { margin-bottom: 12px; font-size: 1.1rem; }
.result-content { color: var(--text-muted); line-height: 1.7; }
.result-content ul { padding-left: 20px; }
.result-content li { margin-bottom: 8px; }

/* How it works */
.how-it-works { margin: 60px 0; text-align: center; }
.how-it-works h2 { margin-bottom: 32px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step { padding: 20px; }
.step-num {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--gradient); color: white;
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 700; margin-bottom: 12px;
}
.step h3 { margin-bottom: 8px; }
.step p { font-size: 0.9rem; color: var(--text-muted); }

/* FAQ */
.faq-section { margin: 60px 0; }
.faq-section h2 { text-align: center; margin-bottom: 32px; }
.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 12px;
}
.faq-item h3 { font-size: 1rem; margin-bottom: 8px; }
.faq-item p { color: var(--text-muted); font-size: 0.9rem; }

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 24px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}
footer a { color: var(--accent); text-decoration: none; }

/* Loading */
.loading {
    display: inline-block; width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,0.3); border-top-color: white;
    border-radius: 50%; animation: spin 0.6s linear infinite;
    vertical-align: middle; margin-right: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 640px) {
    h1 { font-size: 2rem; }
    .features, .steps { grid-template-columns: 1fr; }
    .upload-area { padding: 40px 20px; }
}