/* base.css — tokens, navbar, botones y comportamiento base del sub-sitio ARTERIA.
 * Autocontenido. Compatible con observamed.com/arteria/ y futuro arteria.com.co/.
 */

:root {
    --primary: #003178;
    --primary-container: #0d47a1;
    --on-primary: #ffffff;
    --secondary: #295ea6;
    --secondary-fixed: #d6e3ff;
    --tertiary: #1e3843;
    --surface: #f9f9f9;
    --surface-container-lowest: #ffffff;
    --surface-container-low: #f3f3f3;
    --on-surface: #1a1c1c;
    --on-surface-variant: #434652;
    --outline: #737783;

    --font-headline: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
}

[data-theme="dark"] {
    --primary: #b0c6ff;
    --primary-container: #00429c;
    --on-primary: #001945;
    --secondary: #a9c7ff;
    --secondary-fixed: #00468c;
    --tertiary: #cbe7f5;
    --surface: #0f1115;
    --surface-container-lowest: #1a1c23;
    --surface-container-low: #22252d;
    --on-surface: #e2e2e9;
    --on-surface-variant: #c3c6d4;
    --outline: #8f929d;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--surface);
    color: var(--on-surface);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headline);
    line-height: 1.2;
}

a { text-decoration: none; color: inherit; }

.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--surface-container-low);
    transition: background-color 0.3s ease;
}
[data-theme="dark"] .navbar { background-color: rgba(26, 28, 35, 0.85); }

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
    padding: 0 1.5rem;
    max-width: 1536px;
    margin: 0 auto;
}

.logo { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.logo-img { height: 2rem; width: auto; }
.logo-text {
    font-family: var(--font-headline);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
}
.logo-star { color: var(--secondary); }

.nav-links { display: none; gap: 2rem; }
@media (min-width: 768px) { .nav-links { display: flex; } }
.nav-links a {
    color: var(--on-surface-variant);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
    padding: 0.5rem 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a.active { border-bottom: 2px solid var(--primary); }

.nav-actions { display: flex; gap: 0.5rem; align-items: center; }

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}
.icon-btn:hover { background-color: var(--surface-container-low); }

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.25rem;
    border-radius: 9999px;
    font-weight: 700;
    font-family: var(--font-body);
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
    text-decoration: none;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
    background-color: var(--primary);
    color: var(--on-primary);
    padding: 0.85rem 1.6rem;
    font-size: 0.95rem;
}
.btn-primary:hover { background-color: var(--primary-container); }

body.has-fixed-nav { padding-top: 0; }
main.arteria-page { padding-top: 4rem; }