:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --text-color: #ffffff;
    --accent-color: #ff6b6b;
    --font-main: 'Zen Kaku Gothic New', sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    background: #0f0c29;
    background: linear-gradient(to right, #24243e, #302b63, #0f0c29);
    position: relative;
}

/* Dynamic Background Animation */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 50% 50%, rgba(118, 75, 162, 0.4), transparent 60%),
                radial-gradient(circle at 80% 20%, rgba(102, 126, 234, 0.4), transparent 40%);
    animation: pulseBg 10s infinite alternate;
}

@keyframes pulseBg {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.1); opacity: 1; }
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 20px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.header {
    margin-bottom: 40px;
    animation: fadeInDown 1s ease-out;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 4px 6px rgba(0,0,0,0.3);
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1rem;
    opacity: 0.8;
    font-weight: 300;
}

/* Glass Card Styles */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    animation: fadeInUp 1s ease-out 0.3s backwards;
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
}

input[type="date"] {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-family: var(--font-main);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

input[type="date"]:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
}

.connector {
    margin: 10px 0;
    font-size: 1.5rem;
    color: var(--accent-color);
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    15% { transform: scale(1.3); }
    30% { transform: scale(1); }
    45% { transform: scale(1.15); }
    60% { transform: scale(1); }
}

/* Button Styles */
.cta-button {
    width: 100%;
    padding: 16px;
    margin-top: 20px;
    border: none;
    border-radius: 12px;
    background: var(--primary-gradient);
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.cta-button:active {
    transform: translateY(0);
}

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

.cta-button:hover .btn-shine {
    left: 100%;
    transition: 0.5s;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.visible {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 90%;
    max-width: 400px;
    text-align: center;
    position: relative;
    transform: scale(0.8);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background: rgba(30, 30, 50, 0.85); /* Darker for readability */
}

.modal.visible .modal-content {
    transform: scale(1);
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.close-btn:hover {
    opacity: 1;
}

.score-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 20px auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.progress-ring__circle {
    transition: stroke-dashoffset 1s ease-in-out;
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
    stroke: var(--accent-color);
    stroke-linecap: round;
}

.score-text {
    position: absolute;
    font-size: 1.8rem;
    font-weight: 700;
}

#result-title {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #ffd700;
}

#result-description {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 25px;
    opacity: 0.9;
}

.retry-btn {
    background: transparent;
    border: 1px solid white;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.retry-btn:hover {
    background: white;
    color: #333;
}

.hidden {
    display: none;
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 480px) {
    .header h1 { font-size: 2rem; }
    .glass-card { padding: 30px 20px; }
}