:root {
    --bg-color: #F0F2F5;
    --card-bg: #FFFFFF;
    --text-main: #1A1A1A;
    --text-muted: #666666;
    --accent: #4F46E5;
    --accent-hover: #4338CA;
    --border: #E5E7EB;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
              0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.container {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    max-width: 550px;
    width: 100%;
    box-sizing: border-box;
}

h1 {
    font-size: 1.8rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 10px;
    color: #111;
    letter-spacing: -0.5px;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 30px;
    font-size: 1rem;
    line-height: 1.5;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #374151;
    font-size: 0.95rem;
}

input,
select {
    width: 100%;
    padding: 14px;
    background-color: #F9FAFB;
    border: 2px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    box-sizing: border-box;
    transition: all 0.2s;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

::placeholder {
    color: #9CA3AF;
}

button {
    width: 100%;
    padding: 18px;
    background-color: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    margin-top: 10px;
    transition: background-color 0.2s;
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.2);
}

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

button:disabled {
    background-color: #A5A6F6;
    cursor: wait;
}

#result-area {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    display: none;
    animation: fadeIn 0.5s ease;
}

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

.verdict-label {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    display: block;
}

#product-name {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 12px;
    display: block;
    color: #111;
}

#reasoning {
    font-size: 1rem;
    line-height: 1.6;
    color: #4B5563;
    background-color: #F3F4F6;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid var(--accent);
}

.loading-container {
    text-align: center;
    margin-top: 20px;
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--text-muted);
    font-size: 0.9rem;
}