:root {
    --page-bg: #f0f0f0;
    --panel-bg: #ffffff;
    --text-color: #1f2937;
    --muted-bg: #eeeeee;
    --button-bg: #007bff;
    --button-hover-bg: #0056b3;
    --button-text: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --toggle-bg: #e5e7eb;
    --toggle-active-bg: #1f2937;
    --toggle-active-text: #ffffff;
    --border-color: #d1d5db;
    --input-bg: #ffffff;
    --success-bg: #dcfce7;
    --success-text: #166534;
    --warning-bg: #fee2e2;
    --warning-text: #991b1b;
    --happy-gauge: #ec4899;
    --happy-gauge-soft: #f9a8d4;
    --unhappy-gauge: #7c3aed;
    --unhappy-gauge-soft: #60a5fa;
}

body[data-theme="dark"] {
    --page-bg: #111827;
    --panel-bg: #1f2937;
    --text-color: #f9fafb;
    --muted-bg: #374151;
    --button-bg: #60a5fa;
    --button-hover-bg: #3b82f6;
    --button-text: #0f172a;
    --shadow-color: rgba(0, 0, 0, 0.35);
    --toggle-bg: #374151;
    --toggle-active-bg: #f9fafb;
    --toggle-active-text: #111827;
    --border-color: #4b5563;
    --input-bg: #111827;
    --success-bg: #14532d;
    --success-text: #dcfce7;
    --warning-bg: #7f1d1d;
    --warning-text: #fee2e2;
    --happy-gauge: #f472b6;
    --happy-gauge-soft: #fb7185;
    --unhappy-gauge: #a78bfa;
    --unhappy-gauge-soft: #38bdf8;
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--page-bg);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    text-align: center;
    padding: 2rem;
    background-color: var(--panel-bg);
    border-radius: 10px;
    box-shadow: 0 4px 8px var(--shadow-color);
    width: min(92vw, 460px);
    transition: background-color 0.3s, box-shadow 0.3s;
}

.theme-controls {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 1.5rem;
}

.theme-toggle {
    padding: 8px 12px;
    border: none;
    border-radius: 5px;
    background-color: var(--toggle-bg);
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s, color 0.3s;
}

.theme-toggle.active {
    background-color: var(--toggle-active-bg);
    color: var(--toggle-active-text);
}

.mood-checker {
    display: grid;
    gap: 1rem;
}

.eyebrow {
    margin: 0;
    color: var(--button-bg);
    font-weight: bold;
}

.mood-checker h1 {
    margin: 0;
    font-size: 1.8rem;
}

.mood-result {
    background-color: var(--muted-bg);
    border-radius: 8px;
    padding: 1.25rem;
    transition: background-color 0.3s;
}

.mood-result.happy {
    background-color: var(--success-bg);
    color: var(--success-text);
}

.mood-result.unhappy {
    background-color: var(--warning-bg);
    color: var(--warning-text);
}

.mood-emoji {
    font-size: 4rem;
    line-height: 1;
}

#mood-title {
    margin: 0.75rem 0 0.25rem;
    font-size: 1.25rem;
    font-weight: bold;
}

#mood-confidence {
    margin: 0;
}

#start-camera,
.upload-panel input::file-selector-button,
.contact-form button {
    padding: 10px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    background-color: var(--button-bg);
    color: var(--button-text);
    cursor: pointer;
    transition: background-color 0.3s;
}

#start-camera:hover,
.upload-panel input::file-selector-button:hover,
.contact-form button:hover {
    background-color: var(--button-hover-bg);
}

#start-camera:disabled {
    cursor: progress;
    opacity: 0.75;
}

.webcam-container {
    display: grid;
    place-items: center;
    min-height: 220px;
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.webcam-container canvas {
    width: min(100%, 260px);
    height: auto;
    display: block;
}

.upload-panel {
    display: grid;
    gap: 10px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: left;
}

.upload-panel label {
    font-weight: bold;
}

.upload-panel input {
    width: 100%;
    color: var(--text-color);
    font: inherit;
}

.upload-panel input::file-selector-button {
    margin-right: 10px;
}

.image-preview {
    display: none;
    width: 100%;
    max-height: 260px;
    object-fit: contain;
    border-radius: 8px;
    background-color: var(--muted-bg);
}

.image-preview.visible {
    display: block;
}

.label-container {
    display: grid;
    gap: 8px;
}

.prediction-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    align-items: center;
    text-align: left;
}

.prediction-name {
    font-weight: bold;
    font-size: 1.5rem;
    line-height: 1;
}

.prediction-bar {
    grid-column: 1 / -1;
    height: 8px;
    overflow: hidden;
    border-radius: 999px;
    background-color: var(--muted-bg);
}

.prediction-fill {
    width: 0%;
    height: 100%;
    border-radius: inherit;
    transition: width 0.2s;
}

.prediction-fill.happy {
    background: linear-gradient(90deg, var(--happy-gauge), var(--happy-gauge-soft));
}

.prediction-fill.unhappy {
    background: linear-gradient(90deg, var(--unhappy-gauge), var(--unhappy-gauge-soft));
}

.contact-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: left;
}

.contact-section h2 {
    margin: 0 0 1rem;
    text-align: center;
    font-size: 1.25rem;
}

.contact-form {
    display: grid;
    gap: 10px;
}

.contact-form label {
    font-weight: bold;
}

.contact-form input,
.contact-form textarea {
    box-sizing: border-box;
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 10px 12px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font: inherit;
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form button {
    margin-top: 6px;
}