/* ===== Toolliyo Light / Dark Themes ===== */

/* Dark (default) — mirrors style.css :root tokens */
:root,
[data-theme="dark"] {
    color-scheme: dark;

    --bg-dark: #0f0f23;
    --bg-darker: #070714;
    --bg-card: rgba(15, 15, 35, 0.92);
    --bg-card-hover: rgba(25, 25, 55, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-hover: rgba(255, 255, 255, 0.08);
    --bg-input: rgba(255, 255, 255, 0.06);
    --bg-navbar: rgba(7, 7, 20, 0.88);
    --bg-navbar-scrolled: rgba(7, 7, 20, 0.96);
    --bg-surface-elevated: #1a1a3e;
    --bg-code: #0d1117;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-accent: #c084fc;
    --link-color: #a5b4fc;

    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(99, 102, 241, 0.35);

    --gradient-dark: linear-gradient(180deg, #0f0f23 0%, #1a1a3e 100%);
    --gradient-hero: linear-gradient(135deg, #0f0f23 0%, #1e1b4b 40%, #312e81 70%, #1e1b4b 100%);
    --gradient-card: linear-gradient(145deg, rgba(99, 102, 241, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    --body-glow-1: rgba(99, 102, 241, 0.08);
    --body-glow-2: rgba(6, 182, 212, 0.06);
    --body-glow-3: rgba(139, 92, 246, 0.05);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);

    --navbar-toggler-filter: invert(1);
    --btn-close-filter: invert(1) grayscale(100%) brightness(200%);
    --bs-body-color: var(--text-primary);
    --bs-body-bg: var(--bg-dark);
    --bs-secondary-color: var(--text-secondary);
    --bs-tertiary-color: var(--text-muted);
    --bs-border-color: var(--border-color);
    --bs-emphasis-color: var(--text-primary);
}

/* Light theme */
[data-theme="light"] {
    color-scheme: light;

    --bg-dark: #f8fafc;
    --bg-darker: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --bg-glass: rgba(15, 23, 42, 0.04);
    --bg-glass-hover: rgba(15, 23, 42, 0.07);
    --bg-input: #ffffff;
    --bg-navbar: rgba(255, 255, 255, 0.92);
    --bg-navbar-scrolled: rgba(255, 255, 255, 0.98);
    --bg-surface-elevated: #ffffff;
    --bg-code: #f1f5f9;

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-accent: #7c3aed;
    --link-color: #4f46e5;

    --border-color: rgba(15, 23, 42, 0.12);
    --border-hover: rgba(99, 102, 241, 0.45);

    --gradient-dark: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    --gradient-hero: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 40%, #f0f9ff 70%, #eef2ff 100%);
    --gradient-card: linear-gradient(145deg, rgba(99, 102, 241, 0.06) 0%, rgba(6, 182, 212, 0.04) 100%);
    --body-glow-1: rgba(99, 102, 241, 0.06);
    --body-glow-2: rgba(6, 182, 212, 0.05);
    --body-glow-3: rgba(139, 92, 246, 0.04);

    --shadow-sm: 0 1px 4px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.12);

    --navbar-toggler-filter: none;
    --btn-close-filter: none;
}

/* Typography clarity */
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body::before {
    background:
        radial-gradient(ellipse at 20% 50%, var(--body-glow-1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, var(--body-glow-2) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, var(--body-glow-3) 0%, transparent 50%);
}

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

.navbar.scrolled {
    background: var(--bg-navbar-scrolled) !important;
}

.navbar-toggler-icon {
    filter: var(--navbar-toggler-filter);
}

.btn-close {
    filter: var(--btn-close-filter);
}

/* Theme toggle */
.theme-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full, 9999px);
    border: 1px solid var(--border-color);
    background: var(--bg-glass);
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast, all 0.15s ease);
    padding: 0;
    flex-shrink: 0;
}

.theme-toggle-btn:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-hover);
    color: var(--primary-light, #818cf8);
}

.theme-toggle-btn .theme-icon-light,
.theme-toggle-btn .theme-icon-dark {
    font-size: 1rem;
    line-height: 1;
}

[data-theme="dark"] .theme-toggle-btn .theme-icon-light {
    display: none;
}

[data-theme="dark"] .theme-toggle-btn .theme-icon-dark {
    display: inline;
}

[data-theme="light"] .theme-toggle-btn .theme-icon-dark {
    display: none;
}

[data-theme="light"] .theme-toggle-btn .theme-icon-light {
    display: inline;
}

/* Bootstrap alignment */
[data-theme="light"] .text-white.theme-adaptive,
[data-theme="light"] .card .text-white:not(.btn):not(.badge),
[data-theme="light"] .training-card .text-white,
[data-theme="light"] .topic-card .text-white,
[data-theme="light"] .list-group-item.text-white {
    color: var(--text-primary) !important;
}

[data-theme="light"] .text-secondary {
    color: var(--text-secondary) !important;
}

[data-theme="light"] .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="light"] .bg-dark {
    background-color: var(--bg-surface-elevated) !important;
    color: var(--text-primary) !important;
}

[data-theme="light"] .border-secondary {
    border-color: var(--border-color) !important;
}

[data-theme="light"] .list-group-item-action:hover {
    background: var(--bg-glass-hover) !important;
}

[data-theme="light"] .accordion-button {
    color: var(--text-primary);
    background: var(--bg-glass);
}

[data-theme="light"] .accordion-button:not(.collapsed) {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-dark, #4f46e5);
}

[data-theme="light"] .accordion-body {
    color: var(--text-secondary);
    background: var(--bg-card);
}

[data-theme="light"] .form-control,
[data-theme="light"] .form-select {
    background: var(--bg-input);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="light"] .form-control:focus,
[data-theme="light"] .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.2);
}

[data-theme="light"] .btn-outline-light {
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

[data-theme="light"] .btn-outline-light:hover {
    background: var(--bg-glass-hover) !important;
}

[data-theme="light"] .navbar-collapse .dropdown-menu {
    background: var(--bg-card) !important;
    border-color: var(--border-color) !important;
}

[data-theme="light"] .navbar-collapse {
    border-top-color: var(--border-color) !important;
}

/* Readable content (tutorials, interview Q&A, lessons) */
.lesson-content,
.tutorial-body,
.interview-answer,
.interview-question-body,
.card-text,
.prose-content {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.75;
    letter-spacing: 0.01em;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.lesson-content h1,
.lesson-content h2,
.lesson-content h3,
.tutorial-body h1,
.tutorial-body h2,
.tutorial-body h3,
.interview-answer h1,
.interview-answer h2,
.interview-answer h3 {
    color: var(--text-primary);
}

.lesson-content code:not([class*="language-"]),
.tutorial-body code:not([class*="language-"]),
.interview-answer code:not([class*="language-"]) {
    background: var(--bg-code);
    color: var(--text-primary);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 0.9em;
}

[data-theme="light"] pre[class*="language-"],
[data-theme="light"] code[class*="language-"] {
    background: var(--bg-code) !important;
}

[data-theme="light"] pre[class*="language-"] {
    border-color: var(--border-color) !important;
}

[data-theme="light"] code[class*="language-"] {
    color: #1e293b !important;
}

/* Tutorial reader surfaces */
.tutorial-sidebar,
.offcanvas-theme {
    background: var(--bg-surface-elevated) !important;
    color: var(--text-primary);
    border-color: var(--border-color) !important;
}

.tutorial-mobile-bar {
    background: var(--bg-surface-elevated) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary);
}

.text-on-surface {
    color: var(--text-primary) !important;
}

/* Tables overflow on small screens */
.table-responsive {
    -webkit-overflow-scrolling: touch;
}

/* Responsive navbar height */
@media (max-width: 991.98px) {
    :root,
    [data-theme="dark"],
    [data-theme="light"] {
        --navbar-height: 72px;
    }
}

[data-theme="light"] .navbar-collapse .navbar-nav.ms-auto {
    border-top-color: var(--border-color) !important;
}

@media (max-width: 575.98px) {
    :root,
    [data-theme="dark"],
    [data-theme="light"] {
        --navbar-height: 64px;
    }

    .theme-toggle-btn {
        width: 36px;
        height: 36px;
    }
}