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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --danger-color: #e74c3c;
    --success-color: #27ae60;
    --bg-color: #f5f5f5;
    --text-color: #333;
    --border-radius: 8px;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
}

/* Header */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 0;
    box-shadow: var(--shadow);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.8rem;
}

/* Buttons */
button {
    cursor: pointer;
    border: none;
    padding: 5px 5px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-editar {
    background-color: white;
    color: var(--primary-color);
    font-weight: 600;
}

.btn-editar:hover {
    background-color: #ecf0f1;
}

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

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-primary:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
    flex: 1;
    font-size: 0.95rem;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-secondary:active {
    transform: scale(0.98);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    padding: 5px 10px;
    font-size: 0.9rem;
}

.btn-danger:hover {
    background-color: #c0392b;
}

/* Admin Area */
.admin-area {
    background-color: #fff3cd;
    border-bottom: 2px solid #ffc107;
    padding: 15px 0;
}

.admin-controls {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* Main Content */
main {
    padding: 40px 20px;
}

.categoria-section {
    margin-bottom: 50px;
}

.categoria-section h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--secondary-color);
}

/* Grid de Imagens */
.grid-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.image-item {
    position: relative;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
    cursor: pointer;
}

.image-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.image-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

.image-item .image-info {
    padding: 5px;
}

.image-item .image-name {
    font-weight: 200;
    color: var(--text-color);
    font-size: 12px;
}

.image-item .btn-delete {
    display: none;
}

.admin-mode .image-item .btn-delete {
    display: block;
    width: 100%;
}

.empty-message {
    text-align: center;
    padding: 40px;
    color: #95a5a6;
    font-style: italic;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.3s;
    overflow-y: auto;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content.modal-image {
    max-width: 90%;
    max-height: 90vh;
    position: relative;
}

.modal-content.modal-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
}

.modal-content.modal-image p {
    margin-top: 15px;
    text-align: center;
    font-weight: 600;
    color: var(--text-color);
}

/* Botões de navegação no modal */
.modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    font-size: 24px;
    padding: 15px 20px;
    cursor: pointer;
    z-index: 1002;
    transition: background-color 0.3s;
    border-radius: 0;
    user-select: none;
}

.modal-nav:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

.modal-nav:active {
    background-color: rgba(0, 0, 0, 0.9);
}

.modal-nav-prev {
    left: 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.modal-nav-next {
    right: 0;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.close {
    position: absolute;
    right: 15px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
    transition: color 0.3s;
    z-index: 1001;
}

.close:hover {
    color: #000;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #7f8c8d;
    font-size: 0.85rem;
}

/* Preview de Imagem */
.image-preview {
    margin: 15px 0;
    text-align: center;
}

.image-preview img {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.error-message {
    background-color: #fadbd8;
    color: var(--danger-color);
    padding: 10px;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
}

/* Upload Loading */
.upload-loading {
    text-align: center;
    padding: 20px;
    margin: 15px 0;
}

.upload-loading p {
    margin-top: 10px;
    color: var(--secondary-color);
    font-weight: 600;
}

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

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

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 5px;
        text-align: center;
    }

    .grid-images {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }

    .image-item img {
        height: 150px;
    }

    .admin-controls {
        flex-direction: column;
    }

    .modal-content {
        width: 95%;
        margin: 10% auto;
        padding: 20px;
    }

    /* Setas menores em mobile */
    .modal-nav {
        font-size: 18px;
        padding: 10px 12px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1rem;
    }

    .grid-images {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 10px;
    }

    .image-item img {
        height: 120px;
    }

    /* Setas ainda menores em telas pequenas */
    .modal-nav {
        font-size: 16px;
        padding: 8px 10px;
    }
}