/* =============================================================
   themes.css — Dedicated Light / Dark / System Theme Definitions
   ============================================================= */

:root,
[data-theme="dark"] {
    --bg-base:        #0b0f1a;
    --bg-surface:     #111827;
    --bg-card:        rgba(17, 24, 39, 0.85);
    --bg-card-hover:  rgba(30, 41, 59, 0.90);
    --bg-header:      rgba(11, 15, 26, 0.85);
    --bg-footer:      rgba(11, 15, 26, 0.70);
    --bg-input:       rgba(15, 23, 42, 0.80);
    --border:         rgba(51, 65, 85, 0.7);
    --border-hover:   rgba(59, 130, 246, 0.4);
    --accent:         #3b82f6;
    --accent-hover:   #2563eb;
    --accent-light:   rgba(59, 130, 246, 0.1);
    --text-primary:   #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted:     #94a3b8; /* WCAG 2.2 AA compliant: 7.16:1 contrast ratio against #0f172a (> 4.5:1) */
    --shadow-card:    0 4px 32px rgba(0, 0, 0, 0.4);
    --body-grad-1:    rgba(59, 130, 246, 0.08);
    --body-grad-2:    rgba(16, 185, 129, 0.06);
    color-scheme: dark;
}

[data-theme="light"],
html[data-theme="light"],
body[data-theme="light"] {
    --bg-base:        #f1f5f9;
    --bg-surface:     #ffffff;
    --bg-card:        #ffffff;
    --bg-card-hover:  #f8fafc;
    --bg-header:      rgba(255, 255, 255, 0.92);
    --bg-footer:      #f8fafc;
    --bg-input:       #ffffff;
    --border:         #cbd5e1;
    --border-hover:   #94a3b8;
    --accent:         #2563eb;
    --accent-hover:   #1d4ed8;
    --accent-light:   rgba(37, 99, 235, 0.12);
    --text-primary:   #0f172a;
    --text-secondary: #334155;
    --text-muted:     #64748b;
    --shadow-card:    0 4px 20px rgba(15, 23, 42, 0.08);
    --body-grad-1:    rgba(37, 99, 235, 0.06);
    --body-grad-2:    rgba(16, 185, 129, 0.05);
    color-scheme: light;
}

@media (prefers-color-scheme: light) {
    [data-theme="system"],
    html[data-theme="system"],
    body[data-theme="system"] {
        --bg-base:        #f1f5f9;
        --bg-surface:     #ffffff;
        --bg-card:        #ffffff;
        --bg-card-hover:  #f8fafc;
        --bg-header:      rgba(255, 255, 255, 0.92);
        --bg-footer:      #f8fafc;
        --bg-input:       #ffffff;
        --border:         #cbd5e1;
        --border-hover:   #94a3b8;
        --accent:         #2563eb;
        --accent-hover:   #1d4ed8;
        --accent-light:   rgba(37, 99, 235, 0.12);
        --text-primary:   #0f172a;
        --text-secondary: #334155;
        --text-muted:     #64748b;
        --shadow-card:    0 4px 20px rgba(15, 23, 42, 0.08);
        --body-grad-1:    rgba(37, 99, 235, 0.06);
        --body-grad-2:    rgba(16, 185, 129, 0.05);
        color-scheme: light;
    }
}

/* Dynamic Logo Color Adaptation */
[data-theme="dark"] .brand-logo,
html[data-theme="dark"] .brand-logo,
body[data-theme="dark"] .brand-logo,
[data-theme="dark"] img[src*="logo.svg"],
html[data-theme="dark"] img[src*="logo.svg"],
body[data-theme="dark"] img[src*="logo.svg"] {
    filter: invert(1) brightness(1.2) drop-shadow(0 0 8px rgba(96, 165, 250, 0.5));
}

[data-theme="light"] .brand-logo,
html[data-theme="light"] .brand-logo,
body[data-theme="light"] .brand-logo,
[data-theme="light"] img[src*="logo.svg"],
html[data-theme="light"] img[src*="logo.svg"],
body[data-theme="light"] img[src*="logo.svg"] {
    filter: drop-shadow(0 1px 3px rgba(37, 99, 235, 0.25));
}

/* Active Tabs High Contrast Styling */
.tab-btn.active,
.idp-nav-btn.active {
    background: var(--accent) !important;
    color: #ffffff !important;
    font-weight: 700 !important;
    border-color: var(--accent-hover) !important;
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.35) !important;
}

.idp-nav-btn.active .nav-icon {
    filter: brightness(1.5);
}

/* Light Theme Legibility & Card Polishing */
[data-theme="light"] .card,
html[data-theme="light"] .card,
body[data-theme="light"] .card {
    border-color: #cbd5e1 !important;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
}

[data-theme="light"] .discovery-tabs,
html[data-theme="light"] .discovery-tabs,
body[data-theme="light"] .discovery-tabs {
    background: #e2e8f0 !important;
    border-color: #cbd5e1 !important;
}

[data-theme="light"] .tab-btn:not(.active),
html[data-theme="light"] .tab-btn:not(.active),
body[data-theme="light"] .tab-btn:not(.active),
[data-theme="light"] .idp-nav-btn:not(.active),
html[data-theme="light"] .idp-nav-btn:not(.active),
body[data-theme="light"] .idp-nav-btn:not(.active) {
    color: #334155 !important;
}

[data-theme="light"] .tab-btn:hover:not(.active),
[data-theme="light"] .idp-nav-btn:hover:not(.active) {
    background: rgba(15, 23, 42, 0.06) !important;
    color: #0f172a !important;
}

[data-theme="light"] .user-meta h4,
[data-theme="light"] .rep-card h3,
[data-theme="light"] .session-info strong {
    color: #0f172a !important;
}

[data-theme="light"] .rep-card {
    background: #ffffff !important;
    border-color: #cbd5e1 !important;
}