:root {
    --color-bg: #f7f5f1;
    --color-surface: #ffffff;
    --color-text: #1d2939;
    --color-muted: #667085;
    --color-primary: #0f4c81;
    --color-primary-dark: #0a3457;
    --color-accent: #f5a623;
    --color-border: #e2e2e0;
    --color-error: #b3261e;
    --color-success: #1a8f5e;
    --shadow-card: 0 10px 30px rgba(15, 76, 129, 0.08);
    --shadow-card-hover: 0 18px 45px rgba(15, 76, 129, 0.18);
    --radius-lg: 18px;
    --radius-md: 12px;
    --color-header-bg: rgba(255, 255, 255, 0.92);
    --color-header-border: rgba(15, 76, 129, 0.08);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.55;
}

h1, h2, h3, h4 {
    font-family: 'Playfair Display', Georgia, serif;
    color: var(--color-primary-dark);
    letter-spacing: -0.01em;
}

a {
    color: var(--color-primary);
}

.site-header {
    background: var(--color-header-bg);
    backdrop-filter: saturate(140%) blur(8px);
    border-bottom: 1px solid var(--color-header-border);
    position: sticky;
    top: 0;
    z-index: 50;
}

.site-nav {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.brand {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
    text-decoration: none;
    margin-right: auto;
}

.brand-main {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--color-primary-dark);
}

.brand-sub {
    font-family: 'Inter', system-ui, sans-serif;
    font-weight: 500;
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-muted);
}

.site-main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem 3rem;
}

.site-footer {
    text-align: center;
    color: var(--color-muted);
    padding: 2rem 1.25rem;
    font-size: 0.85rem;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-primary);
    font-size: 1.05rem;
    line-height: 1;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.theme-toggle:hover {
    background: var(--color-bg);
    transform: translateY(-1px);
}

/* Page header */

.page-header {
    text-align: center;
    margin-bottom: 2rem;
}

.page-header h1 {
    margin: 0 0 0.4rem;
    font-size: clamp(1.6rem, 4vw, 2.25rem);
}

.page-subtitle {
    color: var(--color-muted);
    margin: 0;
}

/* Environment switcher */

.env-switcher {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2.25rem;
}

.env-tab {
    padding: 0.5rem 1.25rem;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-muted);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.env-tab:hover {
    transform: translateY(-1px);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.env-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

/* App grid */

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.25rem;
}

.app-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.6rem;
    padding: 2rem 1.5rem;
    background: var(--color-surface);
    border: 1px solid rgba(15, 76, 129, 0.06);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    text-decoration: none;
    color: var(--color-text);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.app-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--accent, var(--color-primary));
}

.app-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    background: color-mix(in srgb, var(--accent, var(--color-primary)) 16%, transparent);
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.app-name {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--color-primary-dark);
}

.app-description {
    color: var(--color-muted);
    font-size: 0.85rem;
}

.app-unavailable-note {
    display: none;
    color: var(--color-error);
    font-size: 0.78rem;
    font-weight: 600;
}

.app-card.unavailable {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.app-card.unavailable:hover {
    transform: none;
    border-color: rgba(15, 76, 129, 0.06);
}

.app-card.unavailable .app-description {
    display: none;
}

.app-card.unavailable .app-unavailable-note {
    display: block;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #14161a;
        --color-surface: #1c1f24;
        --color-text: #f0f0ef;
        --color-muted: #a2a5ab;
        --color-border: #2c3036;
        --color-primary: #3f9db0;
        --color-primary-dark: #6fc2d4;
        --color-header-bg: rgba(28, 31, 36, 0.92);
        --color-header-border: rgba(255, 255, 255, 0.08);
    }

    h1, h2, h3, h4 {
        color: var(--color-primary-dark);
    }
}

/* Manual theme override via the theme-toggle widget; wins over prefers-color-scheme in both directions */
:root[data-theme="dark"] {
    --color-bg: #14161a;
    --color-surface: #1c1f24;
    --color-text: #f0f0ef;
    --color-muted: #a2a5ab;
    --color-border: #2c3036;
    --color-primary: #3f9db0;
    --color-primary-dark: #6fc2d4;
    --color-header-bg: rgba(28, 31, 36, 0.92);
    --color-header-border: rgba(255, 255, 255, 0.08);
}

:root[data-theme="light"] {
    --color-bg: #f7f5f1;
    --color-surface: #ffffff;
    --color-text: #1d2939;
    --color-muted: #667085;
    --color-border: #e2e2e0;
    --color-primary: #0f4c81;
    --color-primary-dark: #0a3457;
    --color-header-bg: rgba(255, 255, 255, 0.92);
    --color-header-border: rgba(15, 76, 129, 0.08);
}