/* ===== CSS Variables ===== */
:root {
    --color-bg: #0a0a0b;
    --color-bg-secondary: #111113;
    --color-bg-tertiary: #18181b;
    --color-surface: #1c1c1f;
    --color-surface-hover: #252528;
    --color-border: #27272a;
    --color-border-light: #3f3f46;

    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;

    --color-primary: #6366f1;
    --color-primary-hover: #818cf8;
    --color-primary-glow: rgba(99, 102, 241, 0.3);

    --color-accent: #22d3ee;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px var(--color-primary-glow);

    --container-max: 1200px;
    --container-padding: 24px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== Container ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

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

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

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

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-light);
}

.btn-block {
    width: 100%;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
}

.logo-icon {
    font-size: 24px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a:not(.btn) {
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:not(.btn):hover {
    color: var(--color-text);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.2s ease;
}

/* ===== Hero ===== */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    background: radial-gradient(ellipse at center top, rgba(99, 102, 241, 0.15) 0%, transparent 50%);
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    margin-bottom: 24px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-accent);
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 100px;
}

.hero h1 {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(to right, var(--color-text), var(--color-text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(18px, 3vw, 24px);
    color: var(--color-primary-hover);
    font-weight: 500;
    margin-bottom: 16px;
}

.hero-description {
    max-width: 640px;
    margin: 0 auto 32px;
    font-size: 18px;
    color: var(--color-text-secondary);
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 64px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* ===== Section Styles ===== */
section {
    padding: 100px 0;
}

section h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 18px;
    max-width: 640px;
    margin: 0 auto 48px;
}

/* ===== Problem Section ===== */
.problem {
    background: var(--color-bg-secondary);
}

.problem-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.problem-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 24px 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.problem-icon {
    font-size: 32px;
}

.problem-title {
    font-weight: 600;
    font-size: 14px;
}

.problem-vendor {
    font-size: 12px;
    color: var(--color-text-muted);
}

.problem-cost {
    color: var(--color-error);
    font-weight: 600;
}

.problem-arrow {
    font-size: 24px;
    color: var(--color-text-muted);
}

.problem-summary {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 16px;
}

/* ===== Solution Section ===== */
.solution-diagram {
    max-width: 800px;
    margin: 0 auto;
}

.solution-box {
    background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-bg-tertiary) 100%);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-glow);
}

.solution-header {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--color-primary-hover);
}

.solution-components {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.solution-component {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    font-weight: 500;
}

.component-icon {
    font-size: 20px;
}

.solution-storage {
    text-align: center;
    padding: 16px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
}

/* ===== Features Grid ===== */
.features {
    background: var(--color-bg);
}

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

.feature-card {
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
    position: relative;
}

.feature-card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-2px);
}

.feature-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, var(--color-surface) 100%);
    border-color: var(--color-primary);
}

.feature-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--color-primary);
    color: white;
    border-radius: 100px;
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
}

.feature-comparison {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

.comparison-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-family: var(--font-mono);
}

.comparison-item.negative {
    color: var(--color-text-muted);
}

.comparison-item.negative::before {
    content: "✗";
    color: var(--color-error);
}

.comparison-item.positive {
    color: var(--color-success);
}

.comparison-item.positive::before {
    content: "✓";
}

.feature-code {
    display: block;
    margin-top: 20px;
    padding: 16px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-secondary);
    white-space: pre;
    overflow-x: auto;
}

/* ===== Code Example Section ===== */
.code-example {
    background: var(--color-bg-secondary);
}

.code-tabs {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.code-tab {
    padding: 12px 24px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

.code-tab:hover {
    color: var(--color-text);
    border-color: var(--color-border-light);
}

.code-tab.active {
    color: var(--color-text);
    background: var(--color-surface);
    border-color: var(--color-primary);
}

.code-content {
    max-width: 800px;
    margin: 0 auto;
}

.code-block {
    display: none;
    margin: 0;
    padding: 24px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow-x: auto;
}

.code-block.active {
    display: block;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.code-keyword { color: #c792ea; }
.code-string { color: #c3e88d; }
.code-number { color: #f78c6c; }
.code-decorator { color: #ffcb6b; }
.code-class { color: #82aaff; }
.code-function { color: #82aaff; }
.code-type { color: #89ddff; }
.code-comment { color: #546e7a; }

/* ===== Comparison Table ===== */
.comparison {
    background: var(--color-bg);
}

.comparison-table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
}

.comparison-table th.highlight,
.comparison-table td.highlight {
    background: rgba(99, 102, 241, 0.1);
}

.comparison-table .check {
    color: var(--color-success);
}

.comparison-table .cross {
    color: var(--color-error);
}

.comparison-table .partial {
    color: var(--color-warning);
}

.comparison-table .cost {
    font-family: var(--font-mono);
    font-weight: 600;
}

.comparison-table .cost-row td {
    padding-top: 24px;
    font-size: 16px;
}

.comparison-table .cost-row .cost.highlight {
    color: var(--color-success);
}

/* ===== Pricing ===== */
.pricing {
    background: var(--color-bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    display: flex;
    flex-direction: column;
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    position: relative;
}

.pricing-card.featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    font-size: 12px;
    font-weight: 600;
    background: var(--color-primary);
    color: white;
    border-radius: 100px;
}

.pricing-header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.pricing-header h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.pricing-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: 8px;
}

.price {
    font-size: 40px;
    font-weight: 700;
}

.period {
    color: var(--color-text-muted);
    font-size: 14px;
}

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

.pricing-features {
    list-style: none;
    flex: 1;
    margin-bottom: 24px;
}

.pricing-features li {
    position: relative;
    padding: 8px 0 8px 24px;
    color: var(--color-text-secondary);
    font-size: 14px;
}

.pricing-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
}

/* ===== Waitlist ===== */
.waitlist {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, var(--color-bg) 100%);
}

.waitlist-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.waitlist-content h2 {
    margin-bottom: 16px;
}

.waitlist-content > p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.waitlist-benefits {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    list-style: none;
    margin-bottom: 32px;
}

.waitlist-benefits li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.waitlist-benefits li::before {
    content: "✓";
    color: var(--color-success);
}

.waitlist-form {
    margin-bottom: 16px;
}

.form-row {
    display: flex;
    gap: 12px;
    max-width: 480px;
    margin: 0 auto;
}

.form-row input {
    flex: 1;
    padding: 16px 20px;
    font-family: var(--font-sans);
    font-size: 16px;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color 0.2s ease;
}

.form-row input::placeholder {
    color: var(--color-text-muted);
}

.form-row input:focus {
    border-color: var(--color-primary);
}

.form-note {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 12px;
}

.waitlist-success {
    padding: 24px;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: var(--radius-lg);
}

.success-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    font-size: 24px;
    background: var(--color-success);
    color: white;
    border-radius: 50%;
    margin-bottom: 16px;
}

.waitlist-success p {
    color: var(--color-success);
    font-weight: 500;
}

/* ===== Footer ===== */
.footer {
    padding: 64px 0 32px;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 48px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.footer-brand {
    max-width: 280px;
}

.footer-brand .logo {
    margin-bottom: 12px;
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 64px;
    flex-wrap: wrap;
}

.footer-column h4 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.footer-column a {
    display: block;
    padding: 6px 0;
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer-column a:hover {
    color: var(--color-text);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 13px;
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: var(--color-text-muted);
    font-size: 13px;
    transition: color 0.2s ease;
}

.footer-legal a:hover {
    color: var(--color-text);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    :root {
        --container-padding: 16px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        padding: 16px;
        background: var(--color-bg-secondary);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 12px 0;
    }

    .nav-links .btn {
        margin-top: 8px;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-stats {
        gap: 32px;
    }

    .stat-value {
        font-size: 28px;
    }

    section {
        padding: 60px 0;
    }

    .problem-diagram {
        flex-direction: column;
    }

    .problem-arrow {
        transform: rotate(90deg);
    }

    .feature-card.featured {
        grid-column: span 1;
    }

    .form-row {
        flex-direction: column;
    }

    .form-row .btn {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-links {
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-description {
        font-size: 15px;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .code-block code {
        font-size: 12px;
    }
}