::-webkit-scrollbar {
    width: 10px;
    border-radius: 10px;
    background-color: #e0c3fc;
}

::-webkit-scrollbar:hover {
    background-color: #e0c3fc;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(to top, var(--primary), var(--secondary));
}

:root {
    --primary: #4361ee;
    --secondary: #7209b7;
    --accent: #f72585;
    --light: #f8f9fa;
    --dark: #212529;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #e0c3fc, #8ec5fc);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--dark);
}

.calculator {
    width: 100%;
    max-width: 450px;
    margin-top: 6rem;
    background-color: var(--light);
    border-radius: 16px;
    box-shadow: 0 10px 30px var(--shadow);
    overflow: hidden;
}

.header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    padding: 25px 20px;
    text-align: center;
    color: white;
}

.header h1 {
    font-size: 24px;
    margin-bottom: 8px;
    font-weight: 600;
}

.header p {
    font-size: 14px;
    opacity: 0.9;
}

.input-section {
    padding: 25px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 15px;
    color: var(--dark);
}

input[type="date"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s;
}

input[type="date"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
    outline: none;
}

.calculator button {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.calculator button:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

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

.result-section {
    padding: 0 25px 25px;
}

.result-card {
    background: linear-gradient(to right, #f8f9fa, #e9ecef);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 15px var(--shadow);
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.5s;
}

.result-card.show {
    transform: translateY(0);
    opacity: 1;
}

.age-display {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin: 10px 0;
}

.details {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
    text-align: center;
}

.detail-item {
    flex: 1;
}

.detail-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--secondary);
}

.detail-label {
    font-size: 12px;
    color: #6c757d;
    margin-top: 5px;
}

@media (max-width: 480px) {
    .calculator {
        border-radius: 12px;
    }

    .header {
        padding: 20px 15px;
    }

    .input-section,
    .result-section {
        padding: 20px;
    }

    .age-display {
        font-size: 28px;
    }
}

/* Navbar */
.navbar {
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: rgba(255, 255, 255, 0.2);
    padding: 15px;
    display: flex;
    justify-content: flex-start;
}

/* Back Button */
.back-button {
    background: #2867f0;
    color: white;
    border: none;
    padding: 0.8rem 20px;
    width: 4rem;
    height: 2.5rem;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.back-button:hover {
    background: #0190f6;
    transform: scale(1.05);
}

.toggle-btn {
    position: fixed;
    top: 0;
    right: 20px;
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 30px;
    cursor: pointer;
    transition: 0.3s;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Toggle theme style */
#toggleTheme {
    background: transparent;
    box-shadow: none;
    position: absolute;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Click animation (subtle scaling effect) */
#toggleTheme:active {
    transform: scale(0.9);
    opacity: 0.7;
}

/* Dark mode effect */
.dark-mode #toggleTheme {
    background: transparent;
    box-shadow: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Click animation in dark mode */
.dark-mode #toggleTheme:active {
    transform: scale(0.9);
    opacity: 0.7;
}

.toggle-btn:hover {
    background: #0056b3;
}

body.dark-mode {
    background: #121212;
    color: #fff;
}

/* Dark mode for header */
.dark-mode nav {
    background: linear-gradient(135deg, #1e1e1e, #333);
}

.dark-mode .calculator{
    background: #2A2A2A;
}
.dark-mode .calculator h2,
.dark-mode .timer{
    text-shadow: none;
}
.dark-mode .calculator button{
    color: #1e1e1e;
}
.dark-mode .calculator button:hover{
    background-color: #121212;
    color: #fff;
}
.dark-mode .header{
        background: linear-gradient(to right, #626b72, #ababab);
   
}

.dark-mode .result-card {
    background: linear-gradient(to right, #4c5358, #878686);
    color: #fff;
}
.dark-mode .details .detail-item div{
    color: #fff;
}
.dark-mode p{
    color: #fff !important;
}