/* Navigation Menu */
.sidebar .nav-group {
    margin-bottom: 2rem;
}

.sidebar .nav-title {
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 0.75rem;
    padding-left: 1rem;
    letter-spacing: 0.05em;
}

.sidebar .nav-item {
    display: block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all 0.2s;
    font-size: 0.95rem;
}

.sidebar .nav-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--accent);
}

.sidebar .nav-item.active {
    background-color: var(--bg-tertiary);
    color: var(--accent);
    font-weight: 500;
}

/* Alert Boxes */
.alert {
    padding: 1rem 1.25rem 1rem 3rem;
    margin: 1.5rem 0;
    border-radius: 8px;
    position: relative;
    border-left: 4px solid transparent;
}

.alert::before {
    position: absolute;
    left: 1rem;
    top: 1.1rem;
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
}

.alert.info {
    background: var(--info-bg);
    color: var(--info-text);
    border-color: var(--info-text);
}

.alert.tip {
    background: var(--tip-bg);
    color: var(--tip-text);
    border-color: var(--tip-text);
}

.alert.warning {
    background: var(--warning-bg);
    color: var(--warning-text);
    border-color: var(--warning-text);
}

.alert.danger {
    background: var(--danger-bg);
    color: var(--danger-text);
    border-color: var(--danger-text);
}

/* Code Blocks */
.code-block-wrapper {
    position: relative;
    margin: 1.5rem 0;
}

pre {
    background-color: var(--code-bg);
    padding: 1.25rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0;
    border: 1px solid var(--border-color);
}

.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, background-color 0.2s;
    user-select: none;
}

.code-block-wrapper:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--accent);
}

.copy-btn.copied {
    background-color: var(--accent);
    color: white;
    border-color: var(--accent);
}

code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    font-size: 0.9rem;
}

/* Typography */
h1 {
    font-size: 2.25rem;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.75rem;
    margin: 2rem 0 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.25rem;
    margin: 1.5rem 0 0.75rem;
}

p {
    margin-bottom: 1.25rem;
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: white;
}

/* Image Enhancements */
main img {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 2rem auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    cursor: zoom-in;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

main img:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.ui-screenshot {
    max-width: 850px !important;
    margin-left: auto !important;
    margin-right: auto !important;
    border: 1px solid rgba(0, 0, 0, 0.1) !important;
}

[data-theme='dark'] .ui-screenshot {
    filter: brightness(0.8) contrast(1.2);
    border-color: rgba(255, 255, 255, 0.2) !important;
}

.img-caption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: -1.5rem;
    margin-bottom: 2rem;
    font-style: italic;
}

/* Lightbox overlay */
#lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    cursor: zoom-out;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#lightbox-overlay.active {
    display: flex;
    opacity: 1;
}

#lightbox-overlay img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 8px;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#lightbox-overlay.active img {
    transform: scale(1);
}