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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /*background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);*/
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    box-shadow: 0 25px 50px rgba(61, 61, 61, 0.3);
    padding: 40px;
    animation: slideIn 0.8s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header {
    text-align: center;
    margin-bottom: 40px;
}
.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}
.header h1 span {
    font-size: 2.5rem;
    color: #2d3748;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: uppercase;
    font-weight: 700;
}


.header p {
    color: #718096;
    font-size: 1.1rem;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.color-picker-section {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.color-picker-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.section-title {
    font-size: 1.5rem;
    color: #2d3748;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-display {
    width: 100%;
    height: 200px;
    border-radius: 16px;
    margin-bottom: 20px;
    background: #ff6b6b;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.color-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        transparent 25%, rgba(255,255,255,0.1) 25%, 
        rgba(255,255,255,0.1) 50%, transparent 50%, 
        transparent 75%, rgba(255,255,255,0.1) 75%);
    background-size: 20px 20px;
    animation: shimmer 2s linear infinite;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.color-display:hover::before {
    opacity: 1;
}

@keyframes shimmer {
    0% { background-position: -20px 0; }
    100% { background-position: 20px 0; }
}

.color-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 20px;
}

.input-group {
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: #4a5568;
    font-weight: 600;
    font-size: 0.9rem;
}

.color-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f7fafc;
}

.color-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white;
}

.native-picker {
    width: 100%;
    height: 60px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    margin-bottom: 20px;
}

.copy-btn {
    width: 100%;
    padding: 14px 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.copy-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.copy-btn:hover::before {
    left: 100%;
}

.copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.copy-btn.copied {
    background: linear-gradient(135deg, #48bb78, #38a169);
}

.harmonies-section {
    grid-column: 1 / -1;
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.harmony-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.harmony-type {
    background: #f7fafc;
    border-radius: 16px;
    padding: 20px;
    transition: all 0.3s ease;
}

.harmony-type:hover {
    background: #edf2f7;
    transform: translateY(-2px);
}

.harmony-title {
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.color-swatches {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.color-swatch {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    border: 2px solid transparent;
}

.color-swatch:hover {
    transform: scale(1.1);
    border-color: #667eea;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.color-swatch::after {
    content: attr(data-color);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: #2d3748;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
}

.color-swatch:hover::after {
    opacity: 1;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #48bb78;
    color: white;
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
    font-weight: 600;
}

.toast.show {
    transform: translateX(0);
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
        margin: 10px;
    }

    .main-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .color-inputs {
        grid-template-columns: 1fr;
    }

    .harmony-grid {
        grid-template-columns: 1fr;
    }

    .color-swatches {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
        margin: 5px;
    }

    .color-picker-section,
    .harmonies-section {
        padding: 20px;
    }
}