/* Landing Page Styles - Clean & Professional */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --accent: #10b981;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --bg-light: #f9fafb;
    --bg-dark: #111827;
    --border: #e5e7eb;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: #fff;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
}

.brand-icon {
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: white;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 14px;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 12px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-light);
}

.btn-launch {
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}

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

/* Hero Section */
.hero {
    padding: 140px 32px 80px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: #ecfdf5;
    color: var(--accent);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid #d1fae5;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.hero .highlight {
    color: var(--primary);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    margin-bottom: 20px;
}

.btn-primary {
    display: inline-block;
    background: var(--text-primary);
    color: white;
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: #374151;
    transform: translateY(-1px);
}

.btn-large {
    padding: 16px 32px;
    font-size: 17px;
}

.privacy-note {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Section Styles */
section {
    padding: 80px 32px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Demo Section */
.demo-section {
    background: var(--bg-light);
}

.demo-preview {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.demo-card {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    margin-bottom: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.demo-header {
    background: var(--bg-light);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border);
}

.demo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.demo-dot.red { background: #ef4444; }
.demo-dot.yellow { background: #f59e0b; }
.demo-dot.green { background: #10b981; }

.demo-title {
    font-size: 12px;
    color: var(--text-secondary);
    margin-left: 8px;
}

.demo-content {
    padding: 24px;
    display: flex;
    justify-content: space-around;
}

.demo-stat {
    text-align: center;
}

.demo-stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.demo-stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.status-focused {
    color: var(--accent);
}

/* Features Section */
.features-section {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.feature-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.1);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 16px;
}

.feature-icon-vision { background: #dbeafe; color: var(--primary); }
.feature-icon-ai { background: #fef3c7; color: #d97706; }
.feature-icon-speed { background: #d1fae5; color: var(--accent); }

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* How It Works */
.how-section {
    background: var(--bg-light);
}

.steps-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.step {
    text-align: center;
    max-width: 220px;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin: 0 auto 16px;
}

.step h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.step p {
    font-size: 14px;
    color: var(--text-secondary);
}

.step-arrow {
    font-size: 24px;
    color: #d1d5db;
    padding-top: 8px;
}

.tech-highlight {
    background: white;
    padding: 32px;
    border-radius: 12px;
    max-width: 700px;
    margin: 0 auto;
    border: 1px solid var(--border);
}

.tech-highlight h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.tech-highlight p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Tech Stack */
.tech-section {
    background: var(--bg-dark);
    color: white;
}

.tech-section .section-title {
    color: white;
}

.tech-section .section-subtitle {
    color: #9ca3af;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.tech-category h4 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary);
    margin-bottom: 16px;
}

.tech-category ul {
    list-style: none;
}

.tech-category li {
    font-size: 14px;
    color: #d1d5db;
    padding: 6px 0;
    border-bottom: 1px solid #374151;
}

/* Future Section */
.future-section {
    background: white;
}

.future-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.future-card {
    padding: 24px;
    background: var(--bg-light);
    border-radius: 12px;
}

.future-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.future-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* CTA Section */
.cta-section {
    background: var(--primary);
    color: white;
    text-align: center;
    padding: 80px 32px;
}

.cta-section h2 {
    font-size: 32px;
    margin-bottom: 12px;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 24px;
}

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

.cta-section .btn-primary:hover {
    background: #f3f4f6;
}

/* Footer */
footer {
    background: var(--bg-dark);
    color: white;
    padding: 48px 32px;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-content p {
    font-size: 14px;
    color: #9ca3af;
    margin-bottom: 8px;
}

.footer-copy {
    font-size: 12px;
    color: #6b7280;
}

/* Feedback Section */
.feedback-section {
    padding: 80px 40px;
    background: var(--bg-light);
}

.feedback-container {
    max-width: 600px;
    margin: 0 auto;
}

.feedback-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feedback-form textarea {
    padding: 16px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-family: inherit;
    font-size: 16px;
    resize: vertical;
    transition: border-color 0.2s;
}

.feedback-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.feedback-status {
    text-align: center;
    font-weight: 600;
    min-height: 24px;
}

.feedback-list-toggle {
    margin-top: 24px;
    text-align: center;
}

.btn-secondary {
    padding: 12px 24px;
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.feedback-list {
    margin-top: 32px;
    padding: 24px;
    background: white;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.feedback-list h4 {
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.feedback-item {
    padding: 16px;
    background: var(--bg-light);
    border-radius: 12px;
    margin-bottom: 12px;
}

.feedback-item p {
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feedback-date {
    font-size: 12px;
    color: var(--text-secondary);
}

.no-feedback {
    color: var(--text-secondary);
    text-align: center;
    font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 12px 16px;
        flex-direction: column;
        gap: 12px;
    }
    
    .header-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero {
        padding: 120px 20px 60px;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    section {
        padding: 60px 20px;
    }
    
    .steps-container {
        flex-direction: column;
        align-items: center;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
}