:root {
    --primary-color: #89CFF0;
    --secondary-color: #C3B1E1;
    --background-color: #F5F5F5;
    --surface-color: #FFFFFF;
    --text-color: #333333;
    --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --border-radius: 16px;
    --spacing: 8px;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

#splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 1s ease-out;
}

#splash-screen .logo {
    font-size: 48px;
    font-weight: 700;
    color: white;
}

#splash-screen .tagline {
    font-size: 18px;
    color: white;
}

.hidden {
    display: none;
}

main {
    padding: calc(var(--spacing) * 2);
    padding-bottom: 80px; /* Space for bottom nav */
}

header {
    text-align: center;
    margin-bottom: calc(var(--spacing) * 2);
}

#dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: calc(var(--spacing) * 2);
}

.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing) * 2);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
}

.card h2, .card h3 {
    margin: 0 0 calc(var(--spacing)) 0;
    font-size: 16px;
}
.card p {
    margin: 0;
    font-size: 14px;
}

.card i {
    font-size: 24px;
    margin-bottom: var(--spacing);
    color: var(--primary-color);
}


.wellness-score .score {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
}

.water .progress-bar {
    width: 100%;
    height: 10px;
    background-color: #eee;
    border-radius: 5px;
    overflow: hidden;
    margin: var(--spacing) 0;
}

.water .progress {
    height: 100%;
    background: var(--gradient);
}


.quick-add {
    display: flex;
    justify-content: space-around;
    margin: calc(var(--spacing) * 3) 0;
}

.btn {
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: var(--spacing) calc(var(--spacing) * 2);
    font-size: 14px;
    cursor: pointer;
    transition: box-shadow 0.2s;
    display: flex;
    align-items: center;
    gap: var(--spacing);
}

.btn:hover {
    box-shadow: 0 6px 16px rgba(0,0,0,0.1);
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--surface-color);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing) 0;
}

.bottom-nav a {
    color: #aaa;
    text-decoration: none;
    text-align: center;
    font-size: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.bottom-nav a.active {
    color: var(--primary-color);
}

.bottom-nav a i {
    font-size: 20px;
}

#tracker-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing) * 2);
}

.meal-tracker ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.meal-tracker li {
    margin-bottom: calc(var(--spacing) / 2);
}

#tracker-dashboard .btn-small {
    padding: calc(var(--spacing) / 2) var(--spacing);
    margin: 0 calc(var(--spacing) / 2);
}

#tracker-dashboard input[type="text"] {
    width: calc(100% - 20px);
    padding: 8px 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-top: var(--spacing);
}