:root {
    /* Tech/Cyberpunk Palette */
    --bg-color: #050505;
    --card-bg: rgba(20, 20, 25, 0.9);
    --primary-color: #00f3ff; /* Cyan Neon */
    --secondary-color: #bc13fe; /* Purple Neon */
    --text-color: #e0e0e0;
    --accent-color: #2979ff;
    
    /* K-Line Colors (Neon) */
    --rise-color: #ff2e63; /* Neon Red */
    --fall-color: #00e676; /* Neon Green */
    
    --border-color: rgba(0, 243, 255, 0.2);
    --shadow-glow: 0 0 10px rgba(0, 243, 255, 0.3);
}

body {
    font-family: 'Rajdhani', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; /* Tech font if available */
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(41, 121, 255, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(188, 19, 254, 0.1) 0%, transparent 20%);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 900px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px; /* Sharper corners for tech look */
    box-shadow: var(--shadow-glow);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

/* Decorative corner accents */
.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border-top: 2px solid var(--primary-color);
    border-left: 2px solid var(--primary-color);
}
.container::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 20px;
    height: 20px;
    border-bottom: 2px solid var(--primary-color);
    border-right: 2px solid var(--primary-color);
}

header {
    text-align: center;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

h1 {
    color: var(--primary-color);
    margin: 0;
    font-size: 28px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 5px var(--primary-color);
}

.subtitle {
    color: var(--secondary-color);
    margin: 10px 0 0;
    font-size: 14px;
    font-family: monospace;
    letter-spacing: 1px;
}

.input-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 4px;
    border: 1px dashed var(--border-color);
}

.input-group {
    display: flex;
    flex-direction: row;
    gap: 10px;
    width: 100%;
    max-width: 350px;
}

label {
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--primary-color);
    font-size: 14px;
    text-transform: uppercase;
}

input[type="date"] {
    padding: 12px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    border-radius: 2px;
    font-size: 16px;
    width: auto;
    flex: 1;
    box-sizing: border-box;
    font-family: monospace;
    outline: none;
    transition: all 0.3s ease;
}

input[type="date"]:focus {
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
    border-color: var(--primary-color);
}

/* Custom calendar icon color fix usually requires webkit-calendar-picker-indicator filter */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1) sepia(1) saturate(5) hue-rotate(175deg);
    cursor: pointer;
}

.btn-primary {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 12px 20px;
    border-radius: 2px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    width: auto;
    flex-shrink: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background: rgba(0, 243, 255, 0.1);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.4);
    text-shadow: 0 0 5px var(--primary-color);
}

.btn-primary:active {
    transform: scale(0.98);
}

.chart-section {
    width: 100%;
    margin-top: 20px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 10px;
    position: relative;
}

/* Grid overlay effect */
.chart-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
    pointer-events: none;
    z-index: 0;
}

.chart-container {
    width: 100%;
    height: 400px;
    z-index: 1;
    position: relative;
}

.summary-card {
    background: rgba(20, 20, 30, 0.8);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--secondary-color); /* Purple accent */
    border-radius: 4px;
    padding: 24px;
    position: relative;
    overflow: hidden;
}

.summary-card::before {
    content: 'DATA_ANALYSIS_2026';
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 10px;
    color: rgba(255, 255, 255, 0.1);
    font-family: monospace;
}

.summary-card h3 {
    margin-top: 0;
    color: var(--secondary-color);
    font-size: 18px;
    border-bottom: 1px solid rgba(188, 19, 254, 0.3);
    padding-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.highlight-text {
    font-weight: bold;
    color: var(--primary-color);
    font-size: 1.1em;
    margin-bottom: 20px;
    font-family: monospace;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
}

.fortune-details {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.fortune-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 15px;
    border-radius: 2px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: border-color 0.3s;
}

.fortune-item:hover {
    border-color: var(--primary-color);
}

.fortune-item .icon {
    font-size: 1.2em;
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.5));
}

.fortune-item strong {
    color: var(--text-color);
    min-width: 80px;
}

.fortune-item span:last-child {
    color: var(--primary-color);
    font-weight: 300;
}

.comment-text {
    font-style: normal;
    color: #a0a0a0;
    line-height: 1.6;
    background: rgba(0, 0, 0, 0.3);
    padding: 15px;
    border-radius: 2px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-family: monospace;
    position: relative;
}

.comment-text::before {
    content: '> ';
    color: var(--primary-color);
}

.vertical-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.2;
    min-width: 40px;
    font-size: 0.9em;
    margin-right: 5px;
    color: var(--text-color);
}

/* Responsive Styles */
@media (min-width: 600px) {
    .input-area {
        flex-direction: row;
        justify-content: center;
    }

    .container {
        padding: 40px;
    }
    
    h1 {
        font-size: 36px;
    }

    .fortune-details {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .fortune-item {
        flex: 1;
    }
    
    .chart-container {
        height: 500px;
    }
}

@media (max-width: 400px) {
    .chart-container {
        height: 350px;
    }
    
    h1 {
        font-size: 24px;
    }
}