:root {
    --color-primary: #6366F1;
    --color-primary-dark: #4F46E5;
    --color-primary-light: #EEF2FF;
    --color-bg: #FFFFFF;
    --color-bg-secondary: #F8FAFC;
    --color-surface: #FFFFFF;
    --color-text: #0F172A;
    --color-text-muted: #64748B;
    --color-border: #F1F5F9;
    --radius: 16px;
    --container: 1720px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Geist', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.site-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }
img { max-width: 100%; height: auto; display: block; }

.container {
    max-width: 100%;
    padding: 0 5vw;
    margin: 0 auto;
}

/* ── Buttons ── */

.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 26px;
    border-radius: var(--radius);
    font-family: var(--font);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    text-align: center;
    letter-spacing: -0.1px;
    line-height: 1;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff;
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.23);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: rgba(255,255,255,0.65);
    font-weight: 500;
    padding: 11px 4px;
}

.btn-ghost:hover {
    color: #fff;
}