/* ========================================
   Qlarum — Global Styles
   McKinsey-inspired: clean, structured, authoritative
   ======================================== */

:root {
    --black: #0a0a0a;
    --dark: #1a1a1a;
    --gray-900: #2a2a2a;
    --gray-600: #6b6b6b;
    --gray-400: #9a9a9a;
    --gray-200: #e0e0e0;
    --gray-100: #f5f5f5;
    --white: #ffffff;
    --accent: #0047ff;
    --accent-light: #e8eeff;
}

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

html {
    scroll-behavior: smooth;
}

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

/* ---- Layout ---- */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.section {
    padding: 120px 0;
}

/* ---- Typography ---- */

h1 {
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--black);
}

h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 48px;
}

h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.body-text {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--gray-600);
    max-width: 540px;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 16px;
}

/* ---- Navigation ---- */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.logo-svg {
    height: 32px;
    width: auto;
}

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

.nav-links a {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray-600);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* ---- Buttons ---- */

.btn {
    display: inline-block;
    padding: 14px 32px;
    background: var(--black);
    color: var(--white);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.2s, transform 0.15s;
}

.btn:hover {
    background: var(--gray-900);
    transform: translateY(-1px);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.8rem;
    background: var(--black);
    color: var(--white);
    border-radius: 4px;
}

/* ---- Hero ---- */

.hero {
    padding: 200px 0 140px;
    background: var(--white);
}

.hero-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gray-400);
    margin-bottom: 24px;
}

.hero-sub {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--gray-600);
    max-width: 560px;
    margin: 28px 0 40px;
}

/* ---- Grids ---- */

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

/* ---- Cards ---- */

.card {
    padding: 36px 32px;
    background: var(--gray-900);
    border-radius: 6px;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-3px);
}

.card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.card h3 {
    color: var(--white);
}

.card p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--gray-400);
}

/* ---- Dark Section ---- */

.section-dark {
    background: var(--dark);
    color: var(--white);
}

.section-dark h2 {
    color: var(--white);
}

.section-dark .section-label {
    color: var(--accent);
}

/* ---- Stats ---- */

.stats {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--black);
    margin-bottom: 8px;
}

.stat-desc {
    font-size: 0.85rem;
    color: var(--gray-600);
    line-height: 1.5;
}

/* ---- Quote / Accent Section ---- */

.section-accent {
    background: var(--gray-100);
    text-align: center;
    padding: 100px 0;
}

.quote {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-weight: 400;
    line-height: 1.6;
    color: var(--black);
    max-width: 720px;
    margin: 0 auto;
    font-style: italic;
}

.quote-attr {
    margin-top: 24px;
    font-size: 0.85rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* ---- Contact ---- */

.contact-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 64px;
}

.contact-actions .btn {
    font-size: 1rem;
}

/* ---- Footer ---- */

.footer {
    padding: 32px 0;
    border-top: 1px solid var(--gray-200);
}

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

.footer .logo-svg {
    height: 24px;
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--gray-400);
}

/* ---- Responsive ---- */

@media (max-width: 900px) {
    .container {
        padding: 0 24px;
    }

    .section {
        padding: 80px 0;
    }

    .hero {
        padding: 140px 0 100px;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .grid-4.stats {
        grid-template-columns: 1fr 1fr;
    }

    .contact-section {
        flex-direction: column;
        align-items: flex-start;
        gap: 32px;
    }

    .nav-links a:not(.btn) {
        display: none;
    }
}

@media (max-width: 480px) {
    .grid-4.stats {
        grid-template-columns: 1fr;
    }
}