:root {
    color-scheme: dark;
    --bg: #0d1117;
    --text: #ffffff;
    --card: #11181f;
    --border: #333;
    --input: #11181f;
    --input-border: #444;
    --button-bg: #161b22;
    --button-hover: #19232b;
    --pre-bg: #2b2b2b;
}

.light-theme {
    color-scheme: light;
    --bg: #f5f5f5;
    --text: #111111;
    --card: #ffffff;
    --border: #d1d1d1;
    --input: #ffffff;
    --input-border: #b8b8b8;
    --button-bg: #f0f0f0;
    --button-hover: #e1e1e1;
    --pre-bg: #efefef;
}

html, body {
    overflow-x: hidden;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: Consolas, monospace;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

.page-shell {
    width: 100%;
    min-height: 100vh;
    padding: 24px;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
}

.card {
    width: min(1200px, 100%);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 24px;
    box-sizing: border-box;
}

.card.wide-card {
    width: auto;
    max-width: none;
}

h1 {
    margin-bottom: 12px;
}

form {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

label {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 6px;
}

input[type="file"],
input[type="number"],
select,
button {
    font-family: Consolas, monospace;
    font-size: 0.95rem;
    padding: 10px 12px;
    border: 1px solid var(--input-border);
    background: var(--input);
    color: var(--text);
    border-radius: 6px;
}

.hidden {
    display: none;
}

#video-output {
    margin-top: 16px;
    padding: 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: auto;
    max-width: none;
    overflow-x: hidden;
}

#video-output .ascii-animation {
    overflow-x: hidden;
    white-space: pre;
    background: var(--pre-bg);
    border-radius: 8px;
    padding: 12px;
    font-family: Consolas, monospace;
}

#video-output .ascii-animation pre {
    margin: 0;
    white-space: pre;
    overflow: visible;
    width: auto;
    max-width: none;
    box-sizing: border-box;
}

.ascii-result {
    width: auto;
    max-width: none;
    overflow-x: hidden;
}

.ascii-result pre {
    width: auto;
    max-width: none;
    overflow: visible;
    box-sizing: border-box;
    white-space: pre;
}

#animation-controls {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

button {
    cursor: pointer;
    background: var(--button-bg);
    color: var(--text);
}

button:hover {
    background: var(--button-hover);
}

.theme-toggle {
    margin: 0 0 12px;
    padding: 8px 12px;
    border: 1px solid var(--input-border);
    border-radius: 999px;
    background: var(--button-bg);
    color: var(--text);
    font-size: 0.95rem;
}

.header {
    position: relative;
}

.header .theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
}

fieldset {
    border: 1px solid #333;
    border-radius: 6px;
    padding: 12px;
}

legend {
    padding: 0 6px;
}

.result-card {
    width: 100%;
    max-width: 900px;
    margin-top: 20px;
    padding: 16px;
    background: #11181f;
    border: 1px solid #333;
    border-radius: 8px;
}

pre {
    font-family: Consolas, monospace;
    line-height: 1;
    letter-spacing: 0;
    font-size: 6px;
    white-space: pre-wrap;
    background: var(--pre-bg);
    padding: 10px;
    border-radius: 8px;
    overflow: visible;
    overflow-wrap: anywhere;
    word-break: break-word;
    margin: 0;
}

@media (max-width: 700px) {
    body {
        margin: 12px;
    }

    pre {
        font-size: 5px;
    }

    .header .theme-toggle {
        position: static;
        width: 100%;
    }
}