:root {
    --primary: #10b981;
    --primary-dark: #059669;
    --secondary: #064e3b;
    --accent: #3b82f6;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --secondary: #ecfdf5;
        --accent: #60a5fa;
        --text-main: #f1f5f9;
        --text-muted: #94a3b8;
        --bg-light: #0f172a;
        --bg-white: #020617;
        --border: #1e293b;
        --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--secondary);
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 3.5rem; margin-bottom: 1.5rem; }
h2 { font-size: 2.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }

p { margin-bottom: 1rem; color: var(--text-muted); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--border);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline-white {
    border: 2px solid white;
    color: white;
}

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

/* Badge */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: #ecfdf5;
    color: var(--primary);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

@media (prefers-color-scheme: dark) {
    .badge {
        background-color: rgba(16, 185, 129, 0.1);
    }
}

/* Header */
.header {
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-white);
    opacity: 0.95;
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

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

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 0.75rem;
}

.logo-img {
    height: 32px;
}

.logo-text {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--secondary);
    letter-spacing: -0.025em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-btns {
    display: flex;
    gap: 1rem;
}

/* Hero */
.hero {
    padding: 6rem 0;
    background: radial-gradient(circle at 90% 10%, var(--bg-light) 0%, var(--bg-white) 50%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
}

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

.hero-desc {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    position: relative;
}

.mockup-container {
    background-color: var(--bg-white);
    padding: 1rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.mockup-img {
    width: 100%;
    height: auto;
    border-radius: 0.5rem;
    display: block;
}

@media (prefers-color-scheme: dark) {
    .mockup-img, .ui-mockup {
        filter: brightness(0.8) contrast(1.2);
    }
}

/* Stats */
.stats {
    padding: 4rem 0;
    border-bottom: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--text-muted);
    font-weight: 500;
}

/* Features */
.features {
    padding: 8rem 0;
    background-color: var(--bg-light);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--bg-white);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
    border: 1px solid transparent;
}

@media (prefers-color-scheme: dark) {
    .feature-card {
        border-color: var(--border);
    }
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

/* Visual Management */
.visual-management, .carbon-insights {
    padding: 8rem 0;
}

.visual-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 6rem;
}

.visual-grid.reverse {
    direction: rtl;
}

.visual-grid.reverse .visual-content {
    direction: ltr;
}

.feature-list {
    list-style: none;
    margin-top: 2rem;
}

.feature-list li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1.75rem;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.ui-mockup {
    width: 100%;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

/* Architecture */
.architecture {
    padding: 8rem 0;
    background-color: var(--bg-light);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.arch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
}

.arch-item h4 {
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 0.5rem;
    display: inline-block;
}

/* CTA */
.cta {
    padding: 8rem 0;
}

.cta-card {
    background-color: var(--primary);
    color: white;
    padding: 4rem;
    border-radius: 2rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.cta-card h2 {
    color: white;
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.cta-card p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-inline: auto;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Footer */
.footer {
    background-color: var(--bg-white);
    padding: 5rem 0 2rem;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand p {
    margin-top: 1.5rem;
    max-width: 250px;
}

.footer-links h5 {
    margin-bottom: 1.5rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--secondary);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-muted);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    text-align: center;
}

/* Responsive */
@media (max-width: 992px) {
    h1 { font-size: 2.75rem; }
    .hero .container, .visual-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    .hero-actions, .cta-actions {
        justify-content: center;
    }
    .visual-grid.reverse {
        direction: ltr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-btns {
        display: none;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .cta-card {
        padding: 2.5rem 1.5rem;
    }
}