* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: all 0.3s ease-in-out;
}

body {
    background: linear-gradient(135deg, #16213e, #1a1a2e);
    color: #f8f9fa;
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: start;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
}

header {
    text-align: center;
    padding: 40px 20px;
    margin-bottom: 40px;
    background: linear-gradient(45deg, rgba(30, 30, 60, 0.7), rgba(45, 45, 90, 0.8));
    border-radius: 20px;
    backdrop-filter: blur(12px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 4px;
    background: linear-gradient(90deg, #6c63ff, #ff6584, #6c63ff);
    background-size: 200% 100%;
    animation: gradient-animation 5s linear infinite;
}

@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

h1 {
    font-size: 4rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #6c63ff, #ff6584);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    letter-spacing: -1px;
    cursor: pointer;
}

h1:hover {
    transform: scale(1.05);
    text-shadow: 0 0 20px rgba(255, 101, 132, 0.5);
}

.tagline {
    font-size: 1.4rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    color: #e0e0ff;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

@media (max-width: 900px) {
    .main-content { grid-template-columns: 1fr; }
}

.panel {
    background: rgba(30, 30, 60, 0.7);
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(12px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.panel:hover {
    transform: translateY(-5px);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
}

.panel-title {
    font-size: 1.8rem;
    margin-bottom: 25px;
    font-weight: 600;
    color: #f8f9fa;
}

.color-display {
    width: 100%;
    height: 300px;
    border-radius: 16px;
    margin-bottom: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: bold;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
    border: 2px solid rgba(255, 255, 255, 0.15);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.color-display:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5);
}

.color-display::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    pointer-events: none;
}

.hex-input {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    align-items: center;
}

.hex-input input {
    flex: 1;
    padding: 15px;
    border-radius: 12px;
    border: 2px solid rgba(255,255,255,0.15);
    background: rgba(0,0,0,0.25);
    color: white;
    font-size: 1.2rem;
    text-align: center;
    font-weight: bold;
    font-family: 'Fira Code', monospace;
    letter-spacing: 1px;
}

.hex-input input:focus {
    border-color: #6c63ff;
    box-shadow: 0 0 15px rgba(108, 99, 255, 0.5);
}

.hex-input button {
    padding: 12px 30px;
    border-radius: 12px;
    border: none;
    background: #6c63ff;
    color: #f8f9fa;
    font-weight: bold;
    font-size: 1.1rem;
    cursor: pointer;
}

.hex-input button:hover {
    background: #ff6584;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 101, 132, 0.4);
}

.slider-container {
    display: grid;
    grid-template-columns: 70px 1fr 90px;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.slider-container label {
    font-weight: 600;
    color: #a5b4fc;
    font-size: 1.1rem;
}

input[type="range"] {
    appearance: none;
    height: 12px;
    border-radius: 8px;
    background: rgba(255,255,255,0.08);
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 24px; height: 24px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    border: 2px solid #6c63ff;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px rgba(108, 99, 255, 0.7);
}

#red::-webkit-slider-runnable-track   { background: linear-gradient(90deg,#000,#f00); }
#green::-webkit-slider-runnable-track { background: linear-gradient(90deg,#000,#0f0); }
#blue::-webkit-slider-runnable-track  { background: linear-gradient(90deg,#000,#00f); }

.color-value {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 10px 15px;
    text-align: center;
    font-family: monospace;
    font-weight: bold;
    font-size: 1.1rem;
    border: 1px solid rgba(255,255,255,0.1);
}

.formats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
    gap: 20px;
    margin-top: 25px;
}

.format-box {
    background: rgba(0,0,0,0.25);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid rgba(255,255,255,0.05);
    cursor: pointer;
    user-select: none;
}

.format-box:hover {
    transform: translateY(-5px);
    background: rgba(0,0,0,0.4);
    border-color: rgba(255,255,255,0.15);
}

.format-title {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #a5b4fc;
    font-weight: 500;
}

.format-box input {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: none;
    background: rgba(255,255,255,0.08);
    color: white;
    font-family: 'Fira Code', monospace;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    cursor: default;
}

.color-palette {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px,1fr));
    gap: 15px;
    margin-top: 25px;
}

.palette-color {
    height: 110px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 600;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    cursor: pointer;
    position: relative;
    border: 1px solid rgba(255,255,255,0.15);
}

.palette-color:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
    z-index: 2;
}

.palette-color span {
    position: relative;
    z-index: 1;
    padding: 8px;
    background: rgba(0,0,0,0.4);
    border-radius: 6px;
    width: 90%;
    text-align: center;
}

.copy-notification {
    position: fixed;
    top: 30px; left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(45deg, #6c63ff, #ff6584);
    color: white;
    padding: 15px 30px;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.4);
    opacity: 0;
    z-index: 1000;
    font-weight: 600;
}

.copy-notification.show {
    opacity: 1;
}

footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 40px;
    background: rgba(30, 30, 60, 0.7);
    border-radius: 20px 20px 0 0;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.1);
    font-size: 1.1rem;
    position: relative;
}

footer p {
    margin-bottom: 15px;
    opacity: 0.8;
}

.social-links {
    margin-top: 20px;
}

.social-links a {
    color: #f8f9fa;
    margin: 0 15px;
    font-size: 1.8rem;
    text-decoration: none;
}

.social-links a:hover {
    color: #6c63ff;
    transform: scale(1.2);
    text-shadow: 0 0 15px rgba(108, 99, 255, 0.7);
}