:root {
    color-scheme: light dark;

    /* Light Theme */
    --bg-light: #f9f9f9;
    --text-light: #111;
    --input-bg-light: #fff;
    --border-light: #ccc;

    /* Dark Theme */
    --bg-dark: #121212;
    --text-dark: #eee;
    --input-bg-dark: #1e1e1e;
    --border-dark: #444;

    --accent: #4f46e5;
    --accent-hover: #3730a3;
    --radius: 0.5rem;

    --ring-light: #333;
    --ring-dark: #eee;
}

body {
    margin: 0;
    font-family: system-ui, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-light);
    transition: background-color 0.3s, color 0.3s;
    padding: 2rem;
}

body.dark {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

body.dark #themeIcon {
    border-color: var(--ring-dark);
    color: var(--ring-dark);
}

.container {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Theme toggle top-right */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
}

#themeIcon {
    background: none;
    border: 2px solid var(--ring-light);
    border-radius: 50%;
    font-size: 1.4rem;
    cursor: pointer;
    padding: 0.4rem;
    transition: transform 0.2s ease, border-color 0.3s ease;
    color: var(--ring-light);
}

#themeIcon:hover {
    transform: scale(1.2);
}

h1 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.8rem;
    margin-top: 2.5rem;
}

/* Base inputs */
select,
input[type="range"] {
    width: 100%;
    font-size: 1rem;
    padding: 0.75rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    background-color: var(--input-bg-light);
    color: var(--text-light);
    transition: all 0.3s ease;
}

body.dark select,
body.dark input[type="range"] {
    background-color: var(--input-bg-dark);
    color: var(--text-dark);
    border-color: var(--border-dark);
}

/* Labels */
label {
    font-weight: bold;
    display: block;
    margin-top: 1rem;
    margin-bottom: 0.3rem;
}

/* Layout helpers */
.row {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    flex-wrap: wrap;
}

.row>* {
    flex: 1;
}

/* Buttons */
button {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 0.8rem 1.2rem;
    font-size: 1rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

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

.controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1rem;
}

/* Image drop area */
#dropzone {
    border: 2px dashed var(--border-light);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

#dropzone:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

body.dark #dropzone {
    border-color: var(--border-dark);
    background-color: rgba(255, 255, 255, 0.05);
}

/* OCR result output */
#extractedText {
    white-space: pre;
    font-family: monospace;
    font-size: 1rem;
    line-height: 1.5;
    background-color: var(--input-bg-light);
    color: var(--text-light);
    padding: 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    min-height: 150px;
    overflow-x: auto;
}

body.dark #extractedText {
    background-color: var(--input-bg-dark);
    color: var(--text-dark);
    border-color: var(--border-dark);
}