/* Nursing Elites — Global styles & theming */

:root,
[data-theme="light"] {
    color-scheme: light;

    --navy: #1A2E44;
    --navy-deep: #142E6C;
    --heading: #2D465E;
    --accent: #3F8FCB;
    --accent-dark: #2D6FA3;
    --accent-light: #E2EFFA;
    --teal: #4FB3AE;

    --success: #16A365;
    --success-bg: #E9F8F0;
    --error: #D64545;
    --error-bg: #FDECEC;
    --warning: #E8A63E;
    --warning-bg: #FEF4E5;

    --bg: #EEF4FA;
    --bg-alt: #F7FAFC;
    --bg-dark: var(--navy-deep);
    --surface: #FFFFFF;

    --text: #2A2F36;
    --text-muted: #5B6572;
    --text-on-dark: #FFFFFF;
    --border: #D4DEEA;

    --font-heading: "Raleway", "Segoe UI", system-ui, sans-serif;
    --font-nav: "Poppins", "Segoe UI", system-ui, sans-serif;
    --font-body: "Roboto", "Segoe UI", system-ui, sans-serif;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-pill: 999px;

    --shadow-sm: 0 2px 8px rgba(20, 40, 70, 0.06);
    --shadow-md: 0 8px 24px rgba(20, 40, 70, 0.10);
    --shadow-lg: 0 20px 48px rgba(20, 40, 70, 0.14);

    --container: 1180px;
    --gap: 8px;

    --hero-gradient: linear-gradient(135deg, #E4EFF9 0%, #F0F6FC 55%, #FAFCFE 100%);
    --bg-tint: linear-gradient(180deg, #E4EDF7 0%, #EDF3FA 50%, #F4F8FC 100%);
    --footer-gradient: linear-gradient(135deg, var(--navy-deep), #0D2251);
    --accent-glow: rgba(63, 143, 203, 0.14);
    --accent-border: rgba(63, 143, 203, 0.35);
    --btn-primary-shadow: 0 6px 18px rgba(63, 143, 203, 0.35);
    --btn-primary-shadow-hover: 0 10px 24px rgba(63, 143, 203, 0.45);
    --topbar-link-hover: #9FCBEE;
    --teal-bg: #E8F7F6;
}

[data-theme="dark"] {
    color-scheme: dark;

    --bg: #1A2E44;
    --bg-alt: #223A52;
    --surface: #243650;
    --text: #EEF4FA;
    --text-muted: #A8B5C4;
    --heading: #E2EFFA;
    --border: #3A5068;
    --accent-light: color-mix(in srgb, var(--accent) 18%, var(--bg));
    --success-bg: color-mix(in srgb, var(--success) 20%, var(--bg));
    --error-bg: color-mix(in srgb, var(--error) 18%, var(--bg));
    --warning-bg: color-mix(in srgb, var(--warning) 18%, var(--bg));
    --teal-bg: color-mix(in srgb, var(--teal) 18%, var(--bg));
    --hero-gradient: linear-gradient(135deg, #1e3a55 0%, #1a2e44 55%, #162638 100%);
    --accent-glow: rgba(63, 143, 203, 0.22);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body.learner-app {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.2s ease, color 0.2s ease;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--heading);
    line-height: 1.25;
    font-weight: 700;
}

img {
    display: block;
    max-width: 100%;
}

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

button {
    font: inherit;
    cursor: pointer;
}

p {
    margin: 0;
    color: var(--text-muted);
}

h1, h2, h3, h4 {
    margin: 0;
}

.eyebrow,
.badge--accent {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-family: var(--font-nav);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-light);
    padding: 6px 14px;
    border-radius: var(--radius-pill);
}

.icon {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
}

.icon--xs { width: 0.75rem; height: 0.75rem; }
.icon--sm { width: 0.875rem; height: 0.875rem; }
.icon--lg { width: 1.5rem; height: 1.5rem; }
.icon--accent { color: var(--accent); }

[data-theme="light"] .icon--moon,
[data-theme="dark"] .icon--sun {
    display: none;
}