:root {
    --primary-color: #2563eb;
    --bg-color: #f3f4f6;
    --text-color: #1f2937;
    --card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg-color);
    margin: 0;
    color: var(--text-color);
}

.card-container {
    container-type: inline-size;
    width: 100%;
    max-width: 300px;
    margin-bottom: 2rem;
}

.controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

#add-card-form-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.3s ease;
}

#add-card-form-container.hidden {
    display: none;
    opacity: 0;
}

#add-card-form {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 24px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

#add-card-form h3 {
    margin-top: 0;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.input-group {
    margin-bottom: 1.25rem;
    display: flex;
    flex-direction: column;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #4b5563;
}

.input-group input {
    padding: 0.75rem;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    background: #f9fafb;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.form-actions button {
    flex: 1;
    margin: 0;
}

#cancel-btn {
    background-color: #f3f4f6;
    color: #4b5563;
}

#cancel-btn:hover {
    background-color: #e5e7eb;
}

button {
    padding: 0.75rem 1.5rem;
    border: none;
    background-color: white;
    color: var(--primary-color);
    border-radius: 9999px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

#next-btn {
    background-color: var(--primary-color);
    color: white;
}