@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-base: #0f172a;
    --bg-surface: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    --accent-color: #8b5cf6;
    --accent-hover: #7c3aed;
    --success: #10b981;
    --danger: #ef4444;
    --radius: 16px;
    --transition: all 0.3s ease;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: 
        radial-gradient(circle at 0% 0%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    background-attachment: fixed;
}

/* Base Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 10;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 2.5rem;
    width: calc(100% - 260px);
}

/* Brand */
.brand {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand i {
    -webkit-text-fill-color: #8b5cf6;
}

/* Navigation */
.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    background: rgba(139, 92, 246, 0.1);
    color: var(--text-primary);
}

.nav-link.active {
    border-left: 3px solid var(--accent-color);
}

.nav-link i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

/* Glass Cards */
.glass-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.stat-card h3 {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card .value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

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

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-surface);
}

.table th, .table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tr:last-child td {
    border-bottom: none;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-tela { background: rgba(59, 130, 246, 0.1); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.2); }
.badge-bateria { background: rgba(16, 185, 129, 0.1); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-outro { background: rgba(139, 92, 246, 0.1); color: #a78bfa; border: 1px solid rgba(139, 92, 246, 0.2); }

/* Alerts / Flash Messages */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideDown 0.3s ease-out forwards;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-error, .alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

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

/* Page Headers */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: white;
}

/* Flex utilities */
.flex-row {
    display: flex;
    gap: 1.5rem;
}

.flex-1 { flex: 1; }

/* Responsive */
@media (max-width: 768px) {
    .app-container { flex-direction: column; }
    .sidebar { width: 100%; height: auto; position: static; padding: 1rem; }
    .main-content { margin-left: 0; width: 100%; padding: 1.5rem; }
    .nav-menu { flex-direction: row; flex-wrap: wrap; }
    .flex-row { flex-direction: column; }
}