:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: block;
    min-height: 100vh;
}

.container {
    background-color: var(--bg-color);
    padding: 2rem;
    width: 100%;
    max-width: 100%;
    min-height: 100vh;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 2rem;
}

input[type="text"] {
    flex: 1;
    padding: 1rem;
    border-radius: 10px;
    border: 1px solid #334155;
    background-color: #0f172a;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus {
    border-color: var(--primary-color);
}

button {
    padding: 1rem 1.5rem;
    border-radius: 10px;
    border: none;
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    header {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 15px;
    }
    header h1 {
        font-size: 2rem;
    }
    #auth-container {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    .search-box {
        flex-direction: column !important;
    }
    input[type="text"] {
        min-width: 100% !important;
    }
    select#categoria-input, button#track-btn {
        width: 100% !important;
    }
}

@media (max-width: 480px) {
    .store-pill {
        padding: 6px 10px !important;
        font-size: 0.78rem !important;
    }
    #tiendas-container {
        padding: 12px !important;
        gap: 8px !important;
    }
}