/* ============================================================
   KubeDesk — Landing Page Styles
   ============================================================ */

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

:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fb;
    --color-bg-dark: #0f1117;
    --color-text: #1a1d26;
    --color-text-secondary: #5a6072;
    --color-text-muted: #8b90a0;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-accent: #10b981;
    --color-accent-light: #d1fae5;
    --color-border: #e5e7eb;
    --color-border-light: #f0f1f3;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 10px 10px -5px rgba(0,0,0,0.03);
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", Menlo, Monaco, "Courier New", monospace;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); letter-spacing: -0.02em; }
h3 { font-size: 1.125rem; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-bg-alt);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

.section-sub {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-top: 8px;
    margin-bottom: 48px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    background: var(--color-primary);
    color: #fff;
}
.btn:hover { background: var(--color-primary-dark); text-decoration: none; }
.btn-lg { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-sm { padding: 6px 14px; font-size: 0.8125rem; }
.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}
.btn-outline:hover { background: var(--color-bg-alt); border-color: var(--color-text-muted); }
.btn-block { width: 100%; }

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}
.nav-brand {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-icon {
    font-size: 1.25rem;
    color: var(--color-primary);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}
.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
}
.nav-links a:hover { color: var(--color-text); }
.nav-links a.btn { color: #fff; }
.nav-links a.btn:hover { color: #fff; }
.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-text);
}

/* --- Hero --- */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, #f0f4ff 0%, var(--color-bg) 100%);
}
.hero-badge {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 20px;
}
.hero h1 {
    max-width: 720px;
    margin: 0 auto 20px;
}
.hero-sub {
    font-size: 1.1875rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.7;
}
.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.hero-note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* --- Protocols Bar --- */
.protocols {
    padding: 40px 0;
    border-bottom: 1px solid var(--color-border-light);
}
.protocols-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.protocol-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}
.protocol-icon {
    font-size: 1.5rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    border-radius: var(--radius);
    flex-shrink: 0;
}
.protocol-item strong { display: block; font-size: 0.9375rem; }
.protocol-item span { font-size: 0.8125rem; color: var(--color-text-muted); }

/* --- Features --- */
.features {
    padding: 96px 0;
    text-align: center;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    text-align: left;
}
.feature-card {
    padding: 28px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.feature-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}
.feature-icon {
    font-size: 1.5rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-light);
    border-radius: var(--radius);
    margin-bottom: 16px;
}
.feature-card h3 {
    margin-bottom: 8px;
}
.feature-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* --- How It Works --- */
.how-it-works {
    padding: 96px 0;
    background: var(--color-bg-alt);
    text-align: center;
}
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}
.step { text-align: center; }
.step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}
.step h3 { margin-bottom: 8px; }
.step p { font-size: 0.9375rem; color: var(--color-text-secondary); }

/* --- Pricing --- */
.pricing {
    padding: 96px 0;
    text-align: center;
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}
.pricing-card {
    position: relative;
    padding: 36px 28px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: var(--color-bg);
    text-align: left;
}
.pricing-card-featured {
    border-color: var(--color-primary);
    border-width: 2px;
    box-shadow: var(--shadow-xl);
}
.pricing-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}
.pricing-header {
    margin-bottom: 20px;
}
.pricing-header h3 {
    font-size: 1.25rem;
}
.pricing-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}
.pricing-price {
    margin-bottom: 24px;
    display: flex;
    align-items: baseline;
    gap: 2px;
}
.price-currency {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}
.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-text);
    line-height: 1;
}
.price-period {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-left: 4px;
}
.pricing-features {
    list-style: none;
    margin-bottom: 28px;
}
.pricing-features li {
    padding: 6px 0;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.pricing-features li::before {
    content: "\2713";
    font-weight: 700;
    color: var(--color-accent);
    flex-shrink: 0;
}
.pricing-payment-note {
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
}

/* --- Pricing Info (How to Pay) --- */
.pricing-info {
    margin-top: 56px;
}
.pricing-info-card {
    display: flex;
    gap: 16px;
    padding: 24px;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    background: var(--color-bg-alt);
    text-align: left;
}
.pricing-info-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.pricing-info-card h4 {
    font-size: 0.9375rem;
    margin-bottom: 6px;
}
.pricing-info-card p {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* --- Enterprise Contact Form --- */
.enterprise-form-wrapper {
    max-width: 560px;
    margin: 56px auto 0;
    text-align: left;
    padding: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: var(--color-bg);
    box-shadow: var(--shadow);
}
.enterprise-form-wrapper h3 {
    font-size: 1.25rem;
    text-align: center;
    margin-bottom: 6px;
}
.enterprise-form-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: 28px;
    line-height: 1.6;
}
.enterprise-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.form-group label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
}
.form-optional {
    font-weight: 400;
    color: var(--color-text-muted);
}
.form-group input,
.form-group select,
.form-group textarea {
    padding: 9px 12px;
    font-size: 0.875rem;
    font-family: var(--font);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color 0.15s ease;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}
.form-group textarea {
    resize: vertical;
    min-height: 60px;
}
.enterprise-form-note {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 16px;
}

/* --- Getting Started --- */
.getting-started {
    padding: 96px 0;
    background: var(--color-bg-alt);
}
.getting-started h2, .getting-started .section-sub { text-align: center; }
.gs-steps {
    max-width: 640px;
    margin: 0 auto;
}
.gs-step {
    display: flex;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px solid var(--color-border-light);
}
.gs-step:last-child { border-bottom: none; }
.gs-step-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.9375rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
}
.gs-step h3 { margin-bottom: 6px; }
.gs-step p { font-size: 0.9375rem; color: var(--color-text-secondary); line-height: 1.65; }

/* --- Download --- */
.download {
    padding: 96px 0;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, #f0f4ff 100%);
}
.download-actions {
    margin: 32px 0 16px;
}
.btn-download {
    padding: 16px 32px;
    font-size: 1.0625rem;
    border-radius: var(--radius-lg);
    flex-direction: column;
    gap: 4px;
}
.download-meta {
    display: block;
    font-size: 0.75rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
}
.download-note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

/* --- FAQ --- */
.faq {
    padding: 96px 0;
}
.faq h2 { text-align: center; margin-bottom: 48px; }
.faq-grid {
    max-width: 720px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid var(--color-border);
    padding: 0;
}
.faq-item summary {
    padding: 18px 0;
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--color-text-muted);
    transition: transform 0.2s ease;
}
.faq-item[open] summary::after {
    content: "\2212";
}
.faq-item p {
    padding: 0 0 18px;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --- Footer --- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-brand {
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}
.footer-links {
    display: flex;
    gap: 24px;
}
.footer-links a {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-decoration: none;
}
.footer-links a:hover { color: var(--color-text); }
.footer-copy {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    width: 100%;
    text-align: center;
    margin-top: 8px;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 900px) {
    .features-grid,
    .pricing-grid,
    .steps-grid {
        grid-template-columns: 1fr 1fr;
    }
    .protocols-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: 16px 24px;
        gap: 12px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
    }
    .nav-links.nav-open { display: flex; }
    .nav-toggle { display: block; }

    .hero { padding: 120px 0 60px; }
    .hero-sub { font-size: 1.0625rem; }

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

    .pricing-card-featured {
        order: -1;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .enterprise-form-wrapper {
        padding: 24px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
    .footer-links { justify-content: center; }
}