/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-dark);
    background: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
ul, ol { list-style: none; }

/* ── Brand Variables ── */
:root {
    --navy: #1a3a5c;
    --blue: #378add;
    --blue-light: #e8f2fc;
    --blue-hover: #2a6db8;
    --navy-dark: #0f2640;
    --text-dark: #1a2332;
    --text-mid: #475569;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --nav-height: 72px;
    --container-max: 1200px;
    --section-padding: 96px 40px;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
    color: var(--navy);
    line-height: 1.2;
    font-weight: 700;
}

/* ── Container ── */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    padding: 14px 32px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, transform 0.15s, box-shadow 0.2s;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: var(--blue);
    color: var(--white);
}
.btn-primary:hover {
    background: var(--blue-hover);
    box-shadow: 0 4px 12px rgba(55, 138, 221, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.5);
}
.btn-outline:hover {
    border-color: var(--white);
    background: rgba(255, 255, 255, 0.08);
}

.btn-secondary {
    background: transparent;
    color: var(--blue);
    border: 2px solid var(--blue);
}
.btn-secondary:hover {
    background: var(--blue);
    color: var(--white);
}

.btn-white {
    background: var(--white);
    color: var(--navy);
}
.btn-white:hover {
    background: var(--blue-light);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ── Section Shared ── */
.section-label {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 12px;
}
.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    color: var(--navy);
    margin-bottom: 16px;
}
.section-sub {
    font-size: 1.05rem;
    color: var(--text-mid);
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 48px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    :root {
        --section-padding: 64px 24px;
        --nav-height: 64px;
    }
}