/* ========================================
   VARIÁVEIS GLOBAIS E RESET
   ======================================== */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #10b981;
    --accent: #f59e0b;
    --danger: #ef4444;
    
    --bg-dark: #0f0f23;
    --bg-card: rgba(30, 30, 60, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.05);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: rgba(255, 255, 255, 0.1);
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --sidebar-width: 260px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   LOGIN PAGE
   ======================================== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    position: relative;
    width: 100%;
    max-width: 440px;
    z-index: 1;
}

.login-box {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    animation: slideUp 0.6s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    animation: float 3s ease-in-out infinite;
}

.logo-icon.small {
    width: 40px;
    height: 40px;
}

.logo-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.logo-icon.small svg {
    width: 22px;
    height: 22px;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fbbf24;
}

.alert-info {
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #a5b4fc;
}

/* Form Styles */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition);
}

.input-wrapper input {
    width: 100%;
    padding: 14px 14px 14px 48px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.input-wrapper input:focus + .input-icon,
.input-wrapper input:focus ~ .input-icon {
    color: var(--primary);
}

.input-wrapper input::placeholder {
    color: var(--text-muted);
}

.toggle-password {
    position: absolute;
    right: 14px;
    background: none;
    border: none;
    padding: 4px;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}

.toggle-password:hover {
    color: var(--primary);
}

.toggle-password svg {
    width: 20px;
    height: 20px;
}

/* Login Button */
.btn-login {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 24px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.4);
}

.btn-login:active {
    transform: translateY(0);
}

.btn-login svg {
    width: 20px;
    height: 20px;
    transition: var(--transition);
}

.btn-login:hover svg {
    transform: translateX(4px);
}

/* Login Footer */
.login-footer {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.login-footer p {
    font-size: 13px;
    color: var(--text-muted);
}

/* Background Animation */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.gradient-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.sphere-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    top: -150px;
    right: -100px;
    animation: pulse 8s ease-in-out infinite;
}

.sphere-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--secondary), #06b6d4);
    bottom: -100px;
    left: -100px;
    animation: pulse 6s ease-in-out infinite reverse;
}

.sphere-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent), #f97316);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 10s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1) translate(0, 0);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1) translate(20px, 20px);
        opacity: 0.7;
    }
}

/* ========================================
   DASHBOARD PAGE
   ======================================== */
.dashboard-page {
    display: flex;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a3e 50%, var(--bg-dark) 100%);
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    list-style: none;
    padding: 16px 12px;
    flex: 1;
}

.nav-item {
    margin-bottom: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
}

.nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-link:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.nav-item.active .nav-link {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(99, 102, 241, 0.1));
    color: var(--primary-light);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--danger);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
    width: 100%;
}

.logout-btn svg {
    width: 20px;
    height: 20px;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px 32px;
    min-height: 100vh;
}

/* Top Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.header-left h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.header-left p {
    color: var(--text-secondary);
    font-size: 15px;
}

.user-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

/* Alerts Container */
.alerts-container {
    margin-bottom: 24px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.stat-card.gradient-1::before {
    background: linear-gradient(180deg, var(--primary), var(--primary-light));
}

.stat-card.gradient-2::before {
    background: linear-gradient(180deg, var(--secondary), #34d399);
}

.stat-card.gradient-3::before {
    background: linear-gradient(180deg, #8b5cf6, #a78bfa);
}

.stat-card.gradient-4::before {
    background: linear-gradient(180deg, var(--accent), #fbbf24);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary-light);
}

.stat-info {
    flex: 1;
}

.stat-info h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

.stat-trend {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: var(--radius-full);
}

.stat-trend svg {
    width: 16px;
    height: 16px;
}

.stat-trend.positive {
    background: rgba(16, 185, 129, 0.1);
    color: #34d399;
}

.stat-trend.negative {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
}

/* Charts Section */
.charts-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-bottom: 32px;
}

.chart-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.card-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.period-select {
    padding: 8px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
}

.btn-icon {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* Chart Placeholder */
.chart-placeholder {
    height: 200px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.chart-bars {
    display: flex;
    gap: 16px;
    height: 100%;
    align-items: flex-end;
    width: 100%;
    justify-content: space-around;
}

.bar {
    width: 40px;
    background: linear-gradient(180deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    position: relative;
    transition: var(--transition);
}

.bar:hover {
    background: linear-gradient(180deg, var(--primary-light), var(--primary));
    transform: scaleY(1.05);
    transform-origin: bottom;
}

.bar span {
    position: absolute;
    bottom: -28px;
    font-size: 12px;
    color: var(--text-muted);
}

/* Notifications */
.notifications-list {
    list-style: none;
}

.notification-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.notification-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.notification-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notification-icon svg {
    width: 18px;
    height: 18px;
}

.notification-icon.success {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.notification-icon.info {
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
}

.notification-icon.warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.notification-content p {
    font-size: 14px;
    margin-bottom: 2px;
}

.notification-content span {
    font-size: 12px;
    color: var(--text-muted);
}

/* System Info */
.system-info {
    margin-bottom: 32px;
}

.info-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
}

.info-card.glass {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
}

.info-card h3 {
    font-size: 18px;
    margin-bottom: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-item .label {
    font-size: 13px;
    color: var(--text-muted);
}

.info-item .value {
    font-size: 15px;
    font-weight: 600;
}

.status-online {
    color: var(--secondary);
}

/* Responsive */
@media (max-width: 1024px) {
    .charts-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: 0;
        padding: 16px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .top-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
}