:root {
    --primary: #00f0ff;
    --primary-dark: #0088ff;
    --secondary: #ff00aa;
    --bg: #0a0a12;
    --surface: #161622;
    --text: #e0e0ff;
    --text-dim: #a0a0c0;
    --success: #00ffaa;
    --error: #ff3366;
    --font-main: 'Space Grotesk', sans-serif;
    --font-mono: 'Space Mono', monospace;
}

[data-theme="light"] {
    --primary: #0066ff;
    --primary-dark: #0044cc;
    --secondary: #ff0099;
    --bg: #f5f5ff;
    --surface: #ffffff;
    --text: #222244;
    --text-dim: #666688;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background 0.4s, color 0.4s, transform 0.2s;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-main);
    min-height: 100vh;
    overflow-x: hidden;
}

.holographic-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.05) 0%, transparent 70%);
    z-index: -1;
    animation: hologram-pulse 15s infinite alternate;
}

@keyframes hologram-pulse {
    0% { opacity: 0.3; }
    100% { opacity: 0.7; }
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(0, 240, 255, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}

h1 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

h1 span {
    font-weight: 300;
}

.theme-switcher {
    width: 60px;
    height: 30px;
    border-radius: 15px;
    background: var(--surface);
    border: none;
    position: relative;
    cursor: pointer;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.2);
}

.switch-handle {
    position: absolute;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: transform 0.3s;
}

[data-theme="dark"] .switch-handle {
    transform: translateX(30px);
}

.input-panel {
    background: var(--surface);
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(0, 240, 255, 0.1);
}

.input-field {
    margin-bottom: 2rem;
    position: relative;
}

.input-field label {
    display: block;
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.date-input-wrapper {
    position: relative;
}

input[type="date"] {
    width: 100%;
    padding: 1.2rem 1.5rem;
    background: var(--surface);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 12px;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    outline: none;
}

.input-highlight {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s;
}

input[type="date"]:focus + .input-highlight {
    width: 100%;
}

.quantum-button {
    position: relative;
    width: 100%;
    padding: 1.5rem;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    overflow: hidden;
    z-index: 1;
}

.button-text {
    position: relative;
    z-index: 2;
}

.button-hover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-dark), var(--secondary));
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1;
}

.button-pulse {
    position: absolute;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: scale(0);
    opacity: 1;
    z-index: 0;
}

.quantum-button:hover .button-hover {
    opacity: 1;
}

.quantum-button:active .button-pulse {
    animation: button-pulse 0.5s;
}

@keyframes button-pulse {
    0% { transform: scale(0); opacity: 1; }
    100% { transform: scale(3); opacity: 0; }
}

.result-display {
    display: none;
    background: var(--surface);
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 2rem;
    border: 1px solid rgba(0, 240, 255, 0.1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(0, 240, 255, 0.1);
}

.result-header h2 {
    font-size: 1.3rem;
    color: var(--text-dim);
    font-weight: 500;
}

.real-time-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--success);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.pulse-effect {
    width: 10px;
    height: 10px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 170, 0.7); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 10px rgba(0, 255, 170, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 170, 0); }
}

.age-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.age-unit {
    position: relative;
    background: rgba(0, 240, 255, 0.05);
    border-radius: 12px;
    padding: 1.5rem 1rem;
    text-align: center;
    border: 1px solid rgba(0, 240, 255, 0.1);
    transition: transform 0.3s;
}

.age-unit:hover {
    transform: translateY(-5px);
    background: rgba(0, 240, 255, 0.1);
}

.unit-value {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.unit-label {
    font-size: 0.9rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.unit-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    opacity: 0.5;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1s linear;
}

.age-unit:hover .unit-wave {
    transform: scaleX(1);
}

.age-insight {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(0, 240, 255, 0.05);
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid var(--secondary);
}

.insight-icon {
    font-size: 1.5rem;
    color: var(--secondary);
}

.age-insight p {
    font-size: 0.95rem;
    line-height: 1.5;
}

footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(0, 240, 255, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer p {
    font-size: 0.9rem;
    color: var(--text-dim);
}

footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
}

.tech-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .age-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .age-grid {
        grid-template-columns: 1fr;
    }

    .input-panel, .result-display {
        padding: 1.5rem;
    }
}