:root {
    color-scheme: light;
    --bg: #f0f0f0;
    --text: #1f1f1f;
    --header-bg: #333;
    --header-text: #fff;
    --card-bg: #fff;
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    --border: #c9c9c9;
    --accent-bg: #333;
    --accent-text: #fff;
    --toggle-hover: rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #121418;
    --text: #e7e9ec;
    --header-bg: #0b0d10;
    --header-text: #e7e9ec;
    --card-bg: #1c1f24;
    --card-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
    --border: #3c4148;
    --accent-bg: #f0c674;
    --accent-text: #1a1a1a;
    --toggle-hover: rgba(255, 255, 255, 0.08);
}

body {
    font-family: sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
    transition: background-color 200ms ease, color 200ms ease;
}

.site-header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.search-container {
    display: flex;
    margin-bottom: 2rem;
}

#mbti-input {
    flex-grow: 1;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background-color: var(--card-bg);
    color: var(--text);
    transition: border-color 200ms ease, background-color 200ms ease, color 200ms ease;
}

#search-btn {
    background-color: var(--accent-bg);
    color: var(--accent-text);
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#results-container {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 4px;
    box-shadow: var(--card-shadow);
    transition: background-color 200ms ease, box-shadow 200ms ease;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background-color: transparent;
    color: inherit;
    cursor: pointer;
    font-size: 0.95rem;
    transition: background-color 200ms ease, border-color 200ms ease;
}

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