/* Theme toggle button */
#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5em;
    padding: 0.5em;
    margin: 0;
    opacity: 0.8;
    transition: opacity 0.2s;
}

#theme-toggle:hover {
    opacity: 1;
}

/* Notion-inspired theme variables with colored headers */
:root {
    color-scheme: light dark; /* Enable system color scheme support */
    
    /* Light theme by default (Notion-style with colored headers) */
    --text-color: #000000;
    --text-secondary: #37352f;
    --bg-color: #ffffff;
    --link-color: #2D9CDB;
    --link-hover: #1A82A8;
    --link-visited: #2D9CDB;
    --pre-bg: #F7F7F7;
    --border-color: #E0E0E0;
    --top-bg: #5397f5;
    --top-text: #ffffff;
    --top-border: #7ba7f1;
    --card-bg: #ffffff;
    --button-bg: #F7F7F7;
    --button-text: #000000;
    --button-hover-bg: #E0E0E0;
    --button-hover-border: #D0D0D0;
    --hover-bg: #F7F7F7;
    --input-bg: #F7F7F7;
    --heading-color: #5397f5;
}

/* Light theme (Notion-style with colored headers) */
:root[data-theme='light'] {
    --text-color: #000000;
    --text-secondary: #37352f;
    --bg-color: #ffffff;
    --link-color: #2D9CDB;
    --link-hover: #1A82A8;
    --link-visited: #2D9CDB;
    --pre-bg: #F7F7F7;
    --border-color: #E0E0E0;
    --top-bg: #5397f5;
    --top-text: #ffffff;
    --top-border: #7ba7f1;
    --card-bg: #ffffff;
    --button-bg: #F7F7F7;
    --button-text: #000000;
    --button-hover-bg: #E0E0E0;
    --button-hover-border: #D0D0D0;
    --hover-bg: #F7F7F7;
    --input-bg: #F7F7F7;
    --heading-color: #5397f5;
}

/* Dark theme (Notion-style with colored headers) */
:root[data-theme='dark'] {
    --text-color: #ffffff;
    --text-secondary: #999999;
    --bg-color: #191919;
    --link-color: #529CCA;
    --link-hover: #7DB9E0;
    --link-visited: #529CCA;
    --pre-bg: #2A2A2A;
    --border-color: #333333;
    --top-bg: #2a5ba8;
    --top-text: #ffffff;
    --top-border: #4d7bc4;
    --card-bg: #222222;
    --button-bg: #333333;
    --button-text: #ffffff;
    --button-hover-bg: #444444;
    --button-hover-border: #555555;
    --hover-bg: #2A2A2A;
    --input-bg: #2A2A2A;
    --heading-color: #7bb0f7;
}

/* Auto theme based on system preference */
:root:not([data-theme='light']):not([data-theme='dark']) {
    --text-color: #000000;
    --text-secondary: #37352f;
    --bg-color: #ffffff;
    --link-color: #2D9CDB;
    --link-hover: #1A82A8;
    --link-visited: #2D9CDB;
    --pre-bg: #F7F7F7;
    --border-color: #E0E0E0;
    --top-bg: #5397f5;
    --top-text: #ffffff;
    --top-border: #7ba7f1;
    --card-bg: #ffffff;
    --button-bg: #F7F7F7;
    --button-text: #000000;
    --button-hover-bg: #E0E0E0;
    --button-hover-border: #D0D0D0;
    --hover-bg: #F7F7F7;
    --input-bg: #F7F7F7;
    --heading-color: #5397f5;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme='light']):not([data-theme='dark']) {
        --text-color: #ffffff;
        --text-secondary: #cccccc;
        --bg-color: #191919;
        --link-color: #7bb0f7;
        --link-hover: #a3c9ff;
        --link-visited: #5d90d8;
        --pre-bg: #2a2a2a;
        --border-color: #333333;
        --top-bg: #2a5ba8;
        --top-text: #ffffff;
        --top-border: #4d7bc4;
        --card-bg: #222222;
        --button-bg: #333333;
        --button-text: #ffffff;
        --button-hover-bg: #444444;
        --button-hover-border: #555555;
        --hover-bg: #2a2a2a;
        --input-bg: #2a2a2a;
        --heading-color: #7bb0f7;
    }
}

/* Global transitions */
* {
    transition: color 0.3s ease,
                background-color 0.3s ease,
                border-color 0.3s ease;
}

/* Theme selector styles (Notion-style) */
.theme-selector {
    margin-top: 2em;
}

.theme-selector h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.75em;
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

#theme-select {
    width: 100%;
    padding: 0.75em 1em;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    cursor: pointer;
    outline: none;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="6"><path d="M0 0l6 6 6-6z" fill="%23333"/></svg>');
    background-repeat: no-repeat;
    background-position: right 1em center;
    padding-right: 2.5em;
}

#theme-select:hover {
    border-color: var(--link-color);
    background-color: var(--hover-bg);
}

#theme-select:focus {
    border-color: var(--link-color);
    box-shadow: 0 0 0 2px rgba(45, 156, 219, 0.2);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme='light']):not([data-theme='dark']) {
        --text-color: #ffffff;
        --text-secondary: #cccccc;
        --bg-color: #191919;
        --link-color: #7bb0f7;
        --link-hover: #a3c9ff;
        --link-visited: #5d90d8;
        --pre-bg: #2a2a2a;
        --border-color: #333333;
        --top-bg: #2a5ba8;
        --top-text: #ffffff;
        --top-border: #4d7bc4;
        --card-bg: #222222;
        --button-bg: #333333;
        --button-text: #ffffff;
        --button-hover-bg: #444444;
        --button-hover-border: #555555;
        --hover-bg: #2a2a2a;
        --input-bg: #2a2a2a;
        --heading-color: #7bb0f7;
    }
}