/* =============================================================================
   ARQ SaaS — Landing Page Styles
   Minimal professional with warmth — architecture office aesthetic
   ============================================================================= */

:root {
    --color-bg: #FFFFFF;
    --color-bg-alt: #F8F9FA;
    --color-text: #1A1A2E;
    --color-text-light: #5E6F7F;
    --color-accent: #A36440;
    --color-accent-hover: #8D5636;
    --color-border: #E5E7EB;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 1100px;
    --radius: 8px;
    --spacing: 8px;
}

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

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing) * 3);
}

/* Header */
.header {
    padding: calc(var(--spacing) * 2) 0;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background: var(--color-bg);
    z-index: 100;
}

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

.logo-link {
    text-decoration: none;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 2.5);
}

.nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s;
}

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

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: calc(var(--spacing) * 1.25) calc(var(--spacing) * 2.5);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.15s;
    cursor: pointer;
    border: none;
    text-align: center;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}

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

.btn-ghost {
    background: transparent;
    color: var(--color-text-light);
    border: 1.5px solid transparent;
}

.btn-ghost:hover {
    color: var(--color-text);
}

.btn-large {
    background: var(--color-accent);
    color: white;
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 4);
    font-size: 1rem;
}

.btn-large:hover {
    background: var(--color-accent-hover);
    color: white;
}

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

.btn-white:hover {
    background: #f5f5f5;
    color: var(--color-accent-hover);
}

/* Hero */
.hero {
    padding: calc(var(--spacing) * 14) 0 calc(var(--spacing) * 12);
    text-align: center;
    background: var(--color-bg-alt);
}

.hero-badge {
    display: inline-block;
    background: rgba(163, 100, 64, 0.1);
    color: var(--color-accent);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 100px;
    margin-bottom: calc(var(--spacing) * 2.5);
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: calc(var(--spacing) * 2.5);
    letter-spacing: -0.03em;
    color: var(--color-text);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-light);
    max-width: 620px;
    margin: 0 auto calc(var(--spacing) * 4);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: calc(var(--spacing) * 2);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.hero-disclaimer {
    font-size: 0.82rem;
    color: var(--color-text-light);
    margin-top: calc(var(--spacing) * 2);
}

/* Sections */
.section {
    padding: calc(var(--spacing) * 12) 0;
    text-align: center;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    font-size: 1.85rem;
    font-weight: 700;
    margin-bottom: calc(var(--spacing) * 2);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto calc(var(--spacing) * 6);
    line-height: 1.7;
}

/* About */
.about-content {
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: calc(var(--spacing) * 3);
    text-align: left;
}

.feature-card {
    background: var(--color-bg);
    padding: calc(var(--spacing) * 4);
    border-radius: calc(var(--radius) * 1.5);
    border: 1px solid var(--color-border);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.feature-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 4px 16px rgba(163, 100, 64, 0.08);
}

.feature-icon {
    /* Inline SVG (Lucide, ISC license). `currentColor` on stroke lets the brand
       accent color drive the icon — and unlike emoji glyphs the rendering is
       byte-identical across platforms with no CLS. */
    width: 1.75rem;
    height: 1.75rem;
    color: var(--color-accent, currentColor);
    margin-bottom: calc(var(--spacing) * 1.5);
}

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: calc(var(--spacing) * 1);
    color: var(--color-text);
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Pricing Toggle */
.pricing-toggle {
    display: flex;
    gap: 4px;
    justify-content: center;
    align-items: center;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    padding: 4px;
    width: fit-content;
    margin: 0 auto calc(var(--spacing) * 6);
}

.toggle-btn {
    background: transparent;
    border: none;
    padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2.5);
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--color-text-light);
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.toggle-btn.active {
    background: white;
    color: var(--color-text);
    font-weight: 600;
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

.badge {
    background: rgba(163, 100, 64, 0.12);
    color: var(--color-accent);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 100px;
}

/* Pricing Grid */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: calc(var(--spacing) * 2.5);
    align-items: start;
}

.pricing-card {
    background: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: calc(var(--radius) * 1.5);
    padding: calc(var(--spacing) * 4);
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing) * 3);
    position: relative;
}

.pricing-card.popular {
    border-color: var(--color-accent);
    box-shadow: 0 8px 32px rgba(163, 100, 64, 0.12);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: white;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 3px 12px;
    border-radius: 100px;
    white-space: nowrap;
}

.pricing-card-header .plan-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
}

.pricing-card-header .plan-desc {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-top: 2px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.pricing-price .price-monthly,
.pricing-price .price-annual {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.03em;
}

.pricing-price .price-period {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.pricing-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing) * 1.25);
    flex: 1;
}

.pricing-features li {
    font-size: 0.9rem;
    color: var(--color-text-light);
    padding-left: calc(var(--spacing) * 3);
    position: relative;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

.pricing-btn {
    width: 100%;
    text-align: center;
    padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 2);
}

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: calc(var(--spacing) * 3);
    text-align: left;
}

.testimonial-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: calc(var(--radius) * 1.5);
    padding: calc(var(--spacing) * 4);
}

.testimonial-text {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.7;
    font-style: italic;
    margin-bottom: calc(var(--spacing) * 2);
}

.testimonial-author {
    font-size: 0.85rem;
    color: var(--color-text-light);
    font-style: normal;
    font-weight: 500;
}

/* CTA Section */
.cta-section {
    background: var(--color-text);
    padding: calc(var(--spacing) * 14) 0;
    text-align: center;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.02em;
    margin-bottom: calc(var(--spacing) * 2);
}

.cta-subtitle {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.65);
    margin-bottom: calc(var(--spacing) * 4);
}

/* Contact */
.contact-text {
    font-size: 1.05rem;
    color: var(--color-text-light);
    margin-bottom: calc(var(--spacing) * 4);
}

/* Footer */
.footer {
    padding: calc(var(--spacing) * 4) 0;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: calc(var(--spacing) * 2);
    flex-wrap: wrap;
}

.footer-links {
    display: flex;
    gap: calc(var(--spacing) * 3);
}

.footer-link {
    color: var(--color-text-light);
    text-decoration: none;
    transition: color 0.15s;
}

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

/* Focus styles — keyboard accessibility (WCAG 2.4.7) */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 3px;
}

.btn:focus-visible,
.nav-link:focus-visible,
.footer-link:focus-visible,
.toggle-btn:focus-visible,
.nav-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

/* Responsive */
@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero {
        padding: calc(var(--spacing) * 8) 0;
    }

    .section {
        padding: calc(var(--spacing) * 8) 0;
    }

    .nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: calc(var(--spacing) * 3);
        gap: calc(var(--spacing) * 2);
        z-index: 99;
    }

    .nav.nav-open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .cta-title {
        font-size: 1.5rem;
    }

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

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        flex-direction: column;
    }
}