:root {
    --primary-red: #D32F2F;
    --dark-red: #8B0000;
    --gold: #FFD700;
    --light-gold: #FFF8E1;
    --bg-dark: #210505;
    --text-color: #333;
    --card-bg: rgba(255, 255, 255, 0.95);
}

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

body {
    font-family: 'Noto Serif SC', 'PingFang SC', 'Microsoft YaHei', serif;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(255, 215, 0, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 80% 80%, rgba(255, 215, 0, 0.1) 0%, transparent 20%),
        linear-gradient(135deg, #2c0606 0%, #1a0202 100%);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 480px;
}

.card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 
        0 20px 50px rgba(0, 0, 0, 0.5),
        0 0 0 4px rgba(255, 215, 0, 0.3); /* Gold border effect */
    position: relative;
    overflow: hidden;
    animation: slideUp 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* Decorative corner knot roughly simulated */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, var(--gold), var(--primary-red), var(--gold));
}

h1 {
    color: var(--primary-red);
    margin-bottom: 12px;
    font-size: 2rem;
    font-weight: 800;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.subtitle {
    color: #666;
    margin-bottom: 30px;
    font-size: 1rem;
    line-height: 1.5;
}

form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input[type="text"] {
    width: 100%;
    padding: 16px 20px;
    border-radius: 12px;
    border: 2px solid #ddd;
    background: #fff;
    font-size: 1.05rem;
    outline: none;
    transition: all 0.3s ease;
    text-align: center;
}

input[type="text"]:focus {
    border-color: var(--primary-red);
    box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.1);
}

button {
    width: 100%;
    padding: 16px;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, var(--primary-red), var(--dark-red));
    color: var(--light-gold);
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(211, 47, 47, 0.3);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(211, 47, 47, 0.4);
}

button:active {
    transform: translateY(0);
}

/* Result Area */
.result {
    margin-top: 35px;
    padding-top: 25px;
    border-top: 2px dashed rgba(0,0,0,0.1);
    animation: fadeIn 0.5s ease;
}

.result p {
    color: #555;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.link-box {
    display: flex;
    background: #f5f5f5;
    padding: 8px;
    border-radius: 12px;
    border: 1px solid #ddd;
    position: relative;
}

.link-box input {
    border: none;
    background: transparent;
    padding: 8px 12px;
    font-size: 0.9rem;
    color: #555;
    text-align: left;
    width: 100%;
    font-family: monospace;
}

.link-box input:focus {
    box-shadow: none;
}

.copy-btn {
    width: auto;
    background: var(--gold);
    color: #4a3b00;
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    box-shadow: none;
    margin-left: 8px;
    white-space: nowrap;
}

.copy-btn:hover {
    background: #ffdf33;
    transform: none;
    box-shadow: none;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 0.95rem;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Mobile Adjustments */
@media (max-width: 480px) {
    .card {
        padding: 30px 20px;
    }
    h1 {
        font-size: 1.6rem;
    }
}