:root {
    --bg-color: #f8f7fc;
    --card-bg-color: #ffffff;
    --text-color: #1f2937;
    --subtle-text-color: #6b7280;
    --primary-color: #8b5cf6;
    --primary-light-color: #a78bfa;
    --border-color: #e5e7eb;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 768px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

main {
    flex-grow: 1;
}

.header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.header p {
    font-size: 1.125rem;
    color: var(--subtle-text-color);
    max-width: 500px;
    margin: 0 auto;
}

#topic-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.card {
    background-color: var(--card-bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 1rem;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease-in-out;
    box-shadow: var(--shadow);
}

.card:hover {
    border-color: var(--primary-light-color);
    transform: translateY(-2px);
}

.card.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.hidden-checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.card-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
}

.checkbox-visual {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    background-color: #f9fafb;
}

.card.selected .checkbox-visual {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-visual svg {
    display: none;
    width: 14px;
    height: 14px;
    color: white;
}

.card.selected .checkbox-visual svg {
    display: block;
}

.topic-name {
    font-weight: 600;
    font-size: 1rem;
}

.topic-percent {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    background-color: var(--bg-color);
    color: var(--subtle-text-color);
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
}

#selections-container {
    margin-top: 1rem;
}

#selections-container h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--subtle-text-color);
    margin-bottom: 0.75rem;
}

#selections-preview, #final-selections {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip {
    display: inline-flex;
    align-items: center;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 500;
}

#final-selections .chip {
    background-color: #eef2ff;
    color: var(--primary-color);
    padding: 0.5rem 1rem;
}

.chip-remove {
    margin-left: 0.5rem;
    width: 18px;
    height: 18px;
    background-color: rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    line-height: 1;
    transition: background-color 0.2s ease;
}

.chip-remove:hover {
    background-color: rgba(0, 0, 0, 0.2);
}

button[type="submit"] {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-top: 1rem;
}

button[type="submit"]:hover:not(:disabled) {
    background-color: #7c3aed;
}

button[type="submit"]:disabled {
    background-color: #c4b5fd;
    cursor: not-allowed;
}

#thank-you-view {
    text-align: center;
}

#thank-you-view .subtle-text {
    color: var(--subtle-text-color);
    margin-top: 2rem;
}

#thank-you-view #final-selections {
    justify-content: center;
    margin-top: 1.5rem;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--subtle-text-color);
    font-size: 0.875rem;
}

footer #total-responses {
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.embed-snippet-container p {
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
}

.embed-code {
    font-family: 'DM Mono', monospace;
    background-color: #eef2ff;
    color: #4338ca;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border: 1px solid #c7d2fe;
    max-width: 100%;
    overflow-x: auto;
}

.embed-code span {
    white-space: nowrap;
}

#copy-snippet-button {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px;
    cursor: pointer;
    display: flex;
    color: var(--subtle-text-color);
}

#copy-snippet-button:hover {
    background-color: #f9fafb;
    color: var(--text-color);
}

#wbx-powered-by-slot {
    margin-top: 2rem;
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .header h1 {
        font-size: 1.875rem;
    }

    .header p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem 0.5rem;
    }
    .grid-container {
        grid-template-columns: 1fr;
    }
    .card {
        padding: 1.5rem 1rem;
    }
    .topic-name {
        font-size: 1.125rem;
    }
}