:root {
    --primary-color: #047857; /* Verde Escuro Arbotech */
    --primary-hover: #065f46;
    --secondary-color: #f3f4f6; /* Cinza bem claro */
    --secondary-hover: #e5e7eb;
    --success-color: #047857;
    --success-hover: #065f46;
    --danger-color: #ef4444;
    --text-main: #111827; /* Quase preto */
    --text-muted: #4b5563; /* Cinza escuro */
    --bg-main: #ffffff; /* Fundo branco */
    --bg-card: #ffffff;
    --border-color: #d1d5db;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    max-width: 250px;
    height: auto;
    margin-bottom: 1.5rem;
}

header h1 {
    font-size: 2.5rem;
    color: var(--text-main); /* Preto em vez de verde no título principal para ficar mais elegante */
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Upload Section */
.upload-section {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    background: var(--secondary-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-box:hover, .upload-box.dragover {
    border-color: var(--primary-color);
    background: #eff6ff;
}

.upload-box i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-box p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* File List */
.file-list {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--secondary-color);
    border-radius: 6px;
    font-size: 0.9rem;
}

.file-item i.fa-trash {
    color: var(--danger-color);
    cursor: pointer;
}

/* Buttons */
button {
    cursor: pointer;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-select {
    background: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.5rem 1.5rem;
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 2rem;
    width: 100%;
    margin-top: 1.5rem;
}

.btn-primary:not(:disabled):hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--secondary-color);
    color: var(--text-main);
    padding: 0.5rem 1rem;
}

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

.btn-success {
    background: var(--success-color);
    color: white;
    padding: 0.5rem 1rem;
}

.btn-success:not(:disabled):hover {
    background: var(--success-hover);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    padding: 0.5rem 1rem;
}

.btn-danger:not(:disabled):hover {
    background: #b91c1c;
}

/* Messages */
.status-message {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 500;
}

.status-message.success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.status-message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.status-message.info {
    background: #e0f2fe;
    color: #075985;
    border: 1px solid #bae6fd;
}

.hidden {
    display: none !important;
}

/* Data Section */
.data-section {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.data-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.action-buttons {
    display: flex;
    gap: 1rem;
}

/* Table */
.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: var(--secondary-color);
    font-weight: 600;
    color: var(--text-main);
    position: sticky;
    top: 0;
}

tr:hover td {
    background: var(--secondary-color);
}

.no-data {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 2rem;
    margin-top: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}