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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --bg: #f9fafb;
    --bg-dark: #111827;
    --text: #1f2937;
    --text-light: #6b7280;
    --border: #e5e7eb;
    --white: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hidden { display: none !important; }

/* Navbar */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 600;
    font-size: 18px;
    color: var(--text);
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-size: 14px;
    transition: color 0.3s;
}

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

/* Buttons */
.btn-primary, .btn-secondary, .btn-large, .btn-small-pro, .btn-close {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--border);
    color: var(--text);
}

.btn-secondary:hover {
    background: #d1d5db;
}

.btn-large {
    padding: 14px 30px;
    font-size: 16px;
    font-weight: 600;
}

.btn-small-pro {
    padding: 8px 14px;
    background: var(--warning);
    color: var(--white);
    font-size: 13px;
    margin-top: 10px;
}

.btn-small-pro:hover {
    background: #d97706;
}

.btn-icon {
    background: transparent;
    border: none;
    color: inherit;
    font-size: 1.2em;
    cursor: pointer;
}

.btn-close {
    background: var(--border);
    color: var(--text);
    width: 100%;
    margin-top: 10px;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 38px;
    margin-bottom: 15px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero .tagline {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Features */
.features {
    padding: 60px 0;
    background: var(--white);
}

.features h2 {
    font-size: 28px;
    margin-bottom: 40px;
    text-align: center;
}

.problem-grid, .features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.problem-card, .feature {
    background: var(--bg);
    padding: 25px;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.problem-card:hover, .feature:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.problem-card h3, .feature h4 {
    margin-bottom: 10px;
    color: var(--text);
}

.feature {
    display: flex;
    gap: 15px;
}

.feature .icon {
    font-size: 24px;
    min-width: 40px;
}

/* Pricing */
.pricing {
    padding: 60px 0;
    background: var(--bg);
}

.pricing h2 {
    font-size: 28px;
    margin-bottom: 40px;
    text-align: center;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.pricing-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    border: 2px solid var(--border);
    transition: all 0.3s;
    position: relative;
}

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
    transform: scale(1.05);
}

.pricing-card .badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--primary);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.pricing-card .price {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 20px;
}

.pricing-card li {
    padding: 8px 0;
    color: var(--text-light);
}

.pro-note {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 15px;
}

/* CTA */
.cta {
    padding: 60px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    text-align: center;
}

.cta h2 {
    font-size: 32px;
    margin-bottom: 25px;
}

/* App layout */
.app-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px 60px;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    color: var(--text);
}

.app-header h1 {
    font-size: 24px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pro-status {
    font-size: 13px;
    padding: 4px 10px;
    border-radius: 12px;
    background: var(--border);
    color: var(--text-light);
}

.pro-status.pro {
    background: var(--success);
    color: var(--white);
}

.app-main-single {
    background: var(--white);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.input-section .hint {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 15px;
}

textarea {
    width: 100%;
    padding: 14px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
    resize: vertical;
    min-height: 220px;
    transition: border-color 0.3s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input-actions, .export-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
}

/* Results / score */
.results-section {
    margin-top: 40px;
    border-top: 1px solid var(--border);
    padding-top: 30px;
}

.score-panel {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.score-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: baseline;
    justify-content: center;
    font-weight: 700;
    font-size: 28px;
    border: 6px solid var(--border);
    flex-shrink: 0;
}

.score-circle .score-max {
    font-size: 14px;
    color: var(--text-light);
    margin-left: 2px;
}

.score-circle.green { border-color: var(--success); color: var(--success); }
.score-circle.yellow { border-color: var(--warning); color: var(--warning); }
.score-circle.red { border-color: var(--danger); color: var(--danger); }

.score-band {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.score-band.green { color: var(--success); }
.score-band.yellow { color: var(--warning); }
.score-band.red { color: var(--danger); }

.counts-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.count-badge {
    font-size: 13px;
    padding: 4px 10px;
    border-radius: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
}

/* Flags */
.flags-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 16px;
}

.flag-card {
    border: 1px solid var(--border);
    border-left: 5px solid var(--border);
    border-radius: 8px;
    padding: 18px 20px;
    background: var(--bg);
}

.flag-card.critical { border-left-color: var(--danger); }
.flag-card.warning { border-left-color: var(--warning); }
.flag-card.info { border-left-color: var(--info); }

.flag-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.flag-header h3 {
    font-size: 16px;
}

.severity-badge {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 4px;
    color: var(--white);
}

.severity-badge.critical { background: var(--danger); }
.severity-badge.warning { background: var(--warning); }
.severity-badge.info { background: var(--info); }

.flag-explain {
    color: var(--text);
    margin-bottom: 8px;
}

.flag-snippet {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 12px;
    color: var(--text-light);
    background: var(--white);
    padding: 8px 10px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.flag-pro {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px dashed var(--border);
}

.flag-pro h4 {
    font-size: 13px;
    margin-bottom: 4px;
    color: var(--primary-dark);
}

.flag-pro p {
    font-size: 14px;
    margin-bottom: 10px;
}

.suggestion {
    background: var(--primary-light);
    padding: 10px 12px;
    border-radius: 6px;
    font-style: italic;
}

.no-flags {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid var(--success);
    color: #065f46;
    padding: 16px;
    border-radius: 8px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--white);
    border-radius: 8px;
    padding: 30px;
    max-width: 460px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content h2 {
    margin-bottom: 12px;
}

.unlock-form {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.unlock-form input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    margin: 10px 0;
    font-size: 14px;
}

/* Footer */
footer {
    background: var(--text);
    color: var(--white);
    padding: 30px 0;
    text-align: center;
    font-size: 12px;
    margin-top: 60px;
}

footer p {
    opacity: 0.8;
}

/* Print */
@media print {
    .app-header, .input-section, .modal, footer { display: none !important; }
    .score-panel, .flags-list { break-inside: avoid; }
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 26px;
    }

    .app-main-single {
        padding: 18px;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .score-panel {
        flex-direction: column;
        align-items: flex-start;
    }
}