/* Theme toggle button */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 2.5rem;
    height: 2.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition-fast),
                background-color var(--transition-fast);
}

.theme-toggle:hover {
    border-color: var(--color-accent);
    background-color: var(--color-bg-alt);
}

.theme-toggle svg {
    width: 1.25rem;
    height: 1.25rem;
    stroke: var(--color-text);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: stroke var(--transition-fast);
}

/* Sun icon visible in dark mode, moon in light */
[data-theme="light"] .icon-sun {
    display: none;
}

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

/* Tags */
.tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    font-family: var(--font-body);
    font-size: 0.875rem;
    text-decoration: none;
    border-radius: 2px;
    transition: background-color var(--transition-fast),
                color var(--transition-fast);
}

.tag:hover,
.tag.active {
    background-color: var(--color-tag-bg-active);
    color: var(--color-tag-text-active);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* Year selector - GitHub contributions style */
.year-selector {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.year-item {
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-body);
    font-size: 1rem;
    text-decoration: none;
    color: var(--color-text);
    border-radius: 4px;
    transition: background-color var(--transition-fast),
                opacity var(--transition-fast);
}

.year-item:hover {
    background-color: var(--color-bg-alt);
}

.year-item.active {
    background-color: var(--color-bg-elevated);
    border-left: 3px solid var(--color-accent);
}

/* Fading effect for older years */
.year-item[data-age="1"] { opacity: var(--opacity-year-1); }
.year-item[data-age="2"] { opacity: var(--opacity-year-2); }
.year-item[data-age="3"] { opacity: var(--opacity-year-3); }
.year-item[data-age="4"] { opacity: var(--opacity-year-4); }
.year-item[data-age="5"] { opacity: var(--opacity-year-5); }

/* Post card */
.post-card {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border-subtle);
    transition: background-color var(--transition-fast);
}

.post-card:last-child {
    border-bottom: none;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.post-meta span::before {
    content: none;
}

.post-excerpt {
    margin-top: var(--spacing-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
}

.post-tags {
    margin-top: var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.post-tags .tag {
    font-size: 0.75rem;
    padding: 2px var(--spacing-xs);
}

/* Interactive badge */
.interactive-badge {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Loading screen */
.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    text-align: center;
    padding: var(--spacing-2xl);
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-message {
    margin-top: var(--spacing-xl);
}

.loading-message h1 {
    font-family: var(--font-body);
    font-size: 1.25rem;
    font-weight: normal;
    margin-bottom: var(--spacing-sm);
}

.loading-content {
    margin-top: var(--spacing-2xl);
    max-width: 500px;
    padding: var(--spacing-lg);
    background-color: var(--color-bg-alt);
    border-radius: 4px;
}

.loading-content-type {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-subtle);
    margin-bottom: var(--spacing-sm);
}

.loading-text {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    font-style: italic;
}

.loading-attribution {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    display: block;
}

/* Empty state */
.empty-state {
    padding: var(--spacing-2xl);
    text-align: center;
    color: var(--color-text-muted);
}

/* Static post page */
.post-static {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
}

.post-header {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border-subtle);
}

.post-title-large {
    font-family: var(--font-body);
    font-size: 2rem;
    font-weight: normal;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.post-header .post-meta {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
}

.post-header .post-tags {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.static-notice {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-bg-alt);
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.static-notice svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--color-text-subtle);
}

.post-content {
    min-height: 50vh;
}

.post-footer {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border-subtle);
}

.back-link {
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-decoration: none;
}

.back-link:hover {
    color: var(--color-text);
}