:root {
    --bg-color: #eef2ff;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: rgba(99, 102, 241, 0.1);
    --input-bg: #ffffff;
    --input-disabled: #f1f5f9;
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f1f5f9;
    --border-color: rgba(99, 102, 241, 0.2);
    --input-bg: #334155;
    --input-disabled: #475569;
    --primary-color: #818cf8;
    --primary-hover: #6366f1;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: all 0.3s ease;
    min-height: 100vh;
    background-image: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(99, 102, 241, 0) 100%);
}

.card {
    background-color: var(--card-bg);
    border: none;
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 20px -3px rgba(0, 0, 0, 0.2);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    border: none;
    border-radius: 1rem 1rem 0 0 !important;
    padding: 1.5rem;
    font-weight: 600;
    font-size: 1.25rem;
    text-align: center;
}

.card-footer {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-color);
    border-radius: 0 0 1rem 1rem !important;
    padding: 1rem;
}

.form-control:disabled {
    background-color: var(--input-disabled);
    color: var(--text-color);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.form-control {
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.input-group-text {
    background-color: var(--input-bg);
    border-color: var(--border-color);
    color: var(--text-color);
    border-radius: 0.5rem 0 0 0.5rem !important;
    padding: 0.75rem;
}

.input-group .form-control {
    border-radius: 0 0.5rem 0.5rem 0;
}

.form-check-input {
    cursor: pointer;
    width: 1.2rem;
    height: 1.2rem;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.theme-switch {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 1000;
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: var(--card-bg);
    box-shadow: var(--card-shadow);
    padding: 0;
}

.theme-switch:hover {
    background: var(--primary-color);
    color: white;
    transform: rotate(180deg);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 5px;
    font-size: 0.8rem;
    color: var(--text-color);
}

.alert {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-color);
}

a {
    color: #0d6efd;
    text-decoration: none;
}

[data-theme="dark"] a {
    color: #2a2a2a;
}

.form-range::-webkit-slider-thumb {
    background: #414346;
}

[data-theme="dark"] .form-range::-webkit-slider-thumb {
    background: #5b9eff;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(99, 102, 241, 0.3);
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-color) 100%);
}

.form-range {
    height: 1.5rem;
    padding: 0;
}

.form-range::-webkit-slider-thumb {
    background: var(--primary-color);
    border: 2px solid var(--card-bg);
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
    height: 1rem;
    width: 1rem;
    margin-top: -0.25rem;
    transition: all 0.3s ease;
}

.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.form-range::-webkit-slider-runnable-track {
    background-color: var(--border-color);
    height: 0.5rem;
    border-radius: 0.25rem;
}

#alert {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(99, 102, 241, 0.2) 100%);
    border: 1px solid var(--primary-color);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}