:root {
    --bg-color: #1a1a1a;
    --card-bg: #252525;
    --text-main: #f4e6c1;
    --text-muted: #a8a8a8;
    --gold: #d4af37;
    --gold-glow: rgba(212, 175, 55, 0.4);
    --border-color: #4a4a4a;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Noto Serif KR', serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    overflow-x: hidden;
}

.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    background-image:
        radial-gradient(circle at 10% 10%, #d4af37 1px, transparent 1px),
        radial-gradient(circle at 90% 90%, #d4af37 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: 600px;
    background-color: var(--card-bg);
    border: 1px solid var(--gold);
    border-radius: 8px;
    padding: 40px;
    box-shadow: var(--shadow), 0 0 15px var(--gold-glow);
    position: relative;
}

.container::before {
    content: "";
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    pointer-events: none;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-family: 'Nanum Myeongjo', serif;
    color: var(--gold);
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 10px;
    text-shadow: 0 0 10px var(--gold-glow);
}

h1 span {
    font-size: 1.8rem;
    color: var(--text-main);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--gold);
    font-size: 1.1rem;
}

input[type="date"],
input[type="time"] {
    width: 100%;
    padding: 12px;
    background-color: #111;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-family: 'Noto Serif KR', serif;
    border-radius: 4px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="date"]:focus,
input[type="time"]:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 8px var(--gold-glow);
}

.time-inputs {
    display: flex;
    gap: 15px;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.checkbox-label input {
    accent-color: var(--gold);
}

.radio-options {
    display: flex;
    gap: 20px;
}

.radio-options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-main);
}

.radio-options input {
    accent-color: var(--gold);
}

button {
    width: 100%;
    padding: 15px;
    background-color: var(--gold);
    color: #1a1a1a;
    border: none;
    border-radius: 4px;
    font-family: 'Nanum Myeongjo', serif;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s, background-color 0.2s;
}

button:hover {
    background-color: #e5c14d;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--gold-glow);
}

.btn-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    transform: scale(0.5);
    transition: opacity 0.5s, transform 0.5s;
}

button:active .btn-glow {
    opacity: 1;
    transform: scale(1);
    transition: 0s;
}

/* Prediction Area */
.result-area {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    animation: fadeIn 0.8s ease-out;
}

.result-header h2 {
    text-align: center;
    color: var(--gold);
    margin-bottom: 20px;
}

.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    margin-bottom: 20px;
}

.hidden {
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(212, 175, 55, 0.3);
    border-radius: 50%;
    border-top-color: var(--gold);
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 15px;
}

#loading {
    text-align: center;
    color: var(--text-muted);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.prediction-content {
    line-height: 1.8;
    white-space: pre-wrap;
    text-align: justify;
}

.prediction-content strong {
    color: var(--gold);
}

footer {
    text-align: center;
    margin-top: 40px;
    font-size: 0.8rem;
    color: #444;
}

/* Share Button */
.share-container {
    margin-top: 30px;
    text-align: center;
    animation: fadeIn 1s ease-out;
}

#shareBtn {
    background-color: #3a3a3a;
    border: 1px solid var(--gold);
    color: var(--gold);
    width: auto;
    padding: 10px 30px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

#shareBtn:hover {
    background-color: #4a4a4a;
    color: #fff;
    box-shadow: 0 0 10px var(--gold-glow);
}