@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@300;400;500;600;700&display=swap');

:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --container-bg: transparent;
    --container-shadow: none;
    --button-bg: #4e7df9;
    --button-color: #ffffff;
    --button-hover-bg: #3a64d8;
    --button-hover-color: #ffffff;
    --info-bg: #e3e9ff;
    --border-color: #e0e0e0;
    --piano-key-active: #4e7df9;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #f5f5f5;
    --container-bg: transparent;
    --container-shadow: none;
    --button-bg: #4e7df9;
    --button-color: #ffffff;
    --button-hover-bg: #3a64d8;
    --button-hover-color: #ffffff;
    --info-bg: #2d2d2d;
    --border-color: #333333;
    --piano-key-active: #4e7df9;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Quicksand', sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0;
    background: transparent;
    box-shadow: none;
}

h1 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 30px;
    font-weight: 700;
}

#cameraContainer {
    position: relative;
    width: 100%;
    height: 400px;
    margin-bottom: 20px;
    overflow: hidden;
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

#cameraFeed, #handCanvas, #pianoOverlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 15px;
}

#cameraFeed {
    background: #000;
}

#handCanvas, #pianoOverlay {
    pointer-events: none;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.theme-switch {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
}

button {
    background: var(--button-bg);
    border: none;
    padding: 12px 24px;
    color: var(--button-color);
    font-weight: 600;
    font-family: 'Quicksand', sans-serif;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
}

button:hover {
    background: var(--button-hover-bg);
    color: var(--button-hover-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

#pianoInfo, #handInfo {
    background: var(--info-bg);
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    transition: background 0.3s ease;
}

#pianoInfo h3, #handInfo h3 {
    margin-bottom: 10px;
    font-weight: 600;
}

.checkbox-container {
    display: flex;
    align-items: center;
    margin: 5px;
    padding: 5px 10px;
    background: var(--bg-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.checkbox-container label {
    margin-right: 5px;
    font-weight: 500;
}

.checkbox-container input {
    margin-right: 5px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
    margin-left: 10px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 30px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--button-bg);
}

input:checked + .slider:before {
    transform: translateX(30px);
}

.theme-icon {
    margin-right: 5px;
    font-size: 18px;
}

/* Main Menu Styles */
.main-menu {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
}

.menu-description {
    text-align: center;
    margin-bottom: 40px;
    font-size: 1.2em;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 400px;
    align-items: center;
    justify-content: center;
}

.menu-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--button-bg);
    color: var(--button-color);
    text-decoration: none;
    border-radius: 15px;
    font-size: 1.2em;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 100%;
}

.menu-button:hover {
    background: var(--button-hover-bg);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.menu-button i {
    margin-right: 15px;
    font-size: 1.5em;
}

/* Back Button Styles */
.back-button {
    margin-bottom: 20px;
}

.back-button a {
    display: inline-flex;
    align-items: center;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    padding: 8px 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.back-button a:hover {
    background: rgba(78, 125, 249, 0.1);
}

.back-button i {
    margin-right: 8px;
}

/* Gesture Display Styles */
.gesture-display {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: rgba(0, 0, 0, 0.6);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 1.2em;
    font-weight: 600;
    z-index: 10;
}

.gesture-info {
    margin-top: 15px;
    text-align: left;
    background-color: var(--bg-color);
    border-radius: 10px;
    padding: 15px;
    border: 1px solid var(--border-color);
}

.gesture-info ul {
    list-style-type: none;
    padding-left: 0;
}

.gesture-info li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.gesture-info li:before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--button-bg);
}

@media (min-width: 768px) {
    .menu-buttons {
        flex-direction: row;
        max-width: 600px;
        justify-content: center;
    }
    
    .menu-button {
        width: auto;
        min-width: 220px;
    }
}