@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
    --primary-color: #005aab;
    --primary-hover: #004a8f;
    --secondary-color: #e0e0e0;
    --secondary-hover: #d0d0d0;
    --background-color: #f4f7f9;
    --card-background: #ffffff;
    --text-color: #333;
    --subtle-text: #666;
    --border-color: #e0e0e0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --focus-ring: 0 0 0 3px rgba(0, 90, 171, 0.2);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 2rem;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-background);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

header {
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
}

h1 {
    color: var(--primary-color);
    font-weight: 600;
}

#status {
    text-align: center;
    padding: 2rem;
    color: var(--subtle-text);
    font-style: italic;
}

/* Controls Section */
#controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 600px) {
    #controls {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

#search-input {
    flex-grow: 1;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--focus-ring);
}

.button-group {
    display: flex;
    gap: 0.5rem;
}

.secondary-btn {
    background-color: var(--secondary-color);
    color: var(--text-color);
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    border-radius: 6px;
    margin-top: 0; /* Override generic button margin */
    width: auto; /* Override generic button width */
}

.secondary-btn:hover {
    background-color: var(--secondary-hover);
}

#product-list {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.product-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: background-color 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.product-item:hover {
    background-color: #f9fafb;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}

.product-item input[type="checkbox"] {
    width: 1.2em;
    height: 1.2em;
    margin-right: 1rem;
    accent-color: var(--primary-color);
}

.product-item label {
    flex-grow: 1;
    cursor: pointer;
}

button {
    display: block;
    width: 100%;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: #fff;
    background-color: var(--primary-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    margin-top: 1rem;
}

button:hover {
    background-color: var(--primary-hover);
}

button:active {
    transform: scale(0.98);
}

#result {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

#result h2 {
    text-align: center;
    font-weight: 600;
}

textarea {
    width: 100%;
    min-height: 100px;
    padding: 0.75rem;
    margin-top: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-family: 'Menlo', 'Consolas', monospace;
    font-size: 0.9rem;
    box-sizing: border-box;
}

.hidden {
    display: none;
}

footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--subtle-text);
}

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

footer a:hover {
    text-decoration: underline;
}