/* =====================================================================
   ChemFlow BPS — Global shell ("Emerald Glass")
   Body backdrop, frosted navbar, links and alerts.
   Colors come from design_tokens.css; components live in components_modern.css.
   ===================================================================== */

html, body { height: 100%; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: 1.7;
    background:
        radial-gradient(1100px 620px at 88% -8%, rgba(14, 163, 113, 0.12), transparent 58%),
        radial-gradient(880px 520px at -8% 112%, rgba(232, 180, 33, 0.07), transparent 55%),
        linear-gradient(170deg, #eef5f1 0%, #e7f1ec 55%, #ecf5f0 100%);
    background-attachment: fixed;
}

a {
    color: var(--color-primary-strong);
    text-decoration: none;
    transition: color var(--transition);
}

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

h1, h2, h3, h4, h5 { color: var(--color-heading); }

/* ------------------------------------------------------------------ *
 *  Frosted-glass navbar
 * ------------------------------------------------------------------ */
.navbar.bg-body-tertiary,
.navbar {
    background: rgba(14, 163, 113, 0.14) !important;
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border-bottom: 1px solid rgba(14, 163, 113, 0.22);
    box-shadow: 0 6px 24px rgba(6, 55, 43, 0.08);
    position: sticky;
    top: 0;
    z-index: 1020;
    transition: background var(--transition), box-shadow var(--transition);
}

.navbar:hover {
    background: rgba(14, 163, 113, 0.20) !important;
    border-bottom-color: rgba(14, 163, 113, 0.30);
    box-shadow: 0 10px 30px rgba(6, 55, 43, 0.12);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--color-heading) !important;
    background: var(--gradient-heading);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: opacity var(--transition);
}

.navbar-brand:hover { opacity: 0.85; }

.navbar-brand .logo {
    height: 52px;
    width: auto;
    -webkit-text-fill-color: initial;
    filter: drop-shadow(0 4px 10px rgba(6, 55, 43, 0.18));
    transition: transform var(--transition);
}

.navbar-brand:hover .logo { transform: scale(1.04); }

.navbar-nav { gap: 0.35rem; }

.nav-link {
    position: relative;
    color: var(--color-heading) !important;
    font-weight: 600;
    letter-spacing: -0.01em;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-pill);
    transition: background var(--transition), color var(--transition), transform var(--transition);
}

.nav-link:hover {
    background: var(--color-primary-tint);
    color: var(--color-primary-strong) !important;
    transform: translateY(-1px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition);
}

.nav-link:hover::after { width: 45%; }

#exitButton.nav-link {
    background: var(--color-danger-soft);
    color: var(--color-danger) !important;
    font-weight: 600;
}

#exitButton.nav-link:hover {
    background: var(--color-danger);
    color: #fff !important;
}

#exitButton.nav-link::after { display: none; }

/* Notification badge */
.navbar .badge.bg-danger {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.85);
}

/* ------------------------------------------------------------------ *
 *  Alerts / flash messages
 * ------------------------------------------------------------------ */
.alert {
    border: 1px solid var(--color-border);
    border-inline-start: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    background: var(--glass-bg-strong);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
    color: var(--color-text);
}

.alert-success { border-inline-start-color: var(--color-success); background: var(--color-success-soft); }
.alert-danger  { border-inline-start-color: var(--color-danger);  background: var(--color-danger-soft); }
.alert-warning { border-inline-start-color: var(--color-warning); background: var(--color-warning-soft); }
.alert-info    { border-inline-start-color: var(--color-info);    background: var(--color-info-soft); }

/* ------------------------------------------------------------------ *
 *  Responsive navbar
 * ------------------------------------------------------------------ */
@media (max-width: 991px) {
    .navbar { background: rgba(212, 240, 228, 0.95) !important; }
    .navbar-nav { gap: 0.2rem; margin-top: 0.75rem; }
    .nav-link { padding: 0.7rem 1rem !important; }
    .nav-link::after { display: none; }
}