:root {
    --bg-dark: #0a0b10;
    --bg-main: #0f1115;
    --bg-card: #161820;
    --bg-sidebar: #0d0e14;
    --bg-glass: rgba(255,255,255,0.04);
    --bg-glass-hover: rgba(255,255,255,0.08);
    --border-glass: rgba(255,255,255,0.08);
    --border-glow: rgba(99,102,241,0.3);
    --text-main: #e2e8f0;
    --text-muted: #64748b;
    --text-heading: #f8fafc;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: rgba(99,102,241,0.15);
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --success: #10b981;
    --success-light: rgba(16,185,129,0.15);
    --danger: #ef4444;
    --danger-light: rgba(239,68,68,0.15);
    --warning: #f59e0b;
    --warning-light: rgba(245,158,11,0.15);
    --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-accent: linear-gradient(135deg, #6366f1, #06b6d4);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
    --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-glow: 0 0 20px rgba(99,102,241,0.2);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow: hidden;
}

a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; outline: none; font-family: inherit; }
ul { list-style: none; }

/* LAYOUT */
.app-container {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 280px;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-glass);
    transition: var(--transition);
}

.main-content {
    flex: 1;
    overflow-y: auto;
    background-color: var(--bg-main);
    padding: 32px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

/* AUTH CONTAINER */
#auth-container {
    height: 100vh;
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
}

#auth-container::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: var(--gradient-primary);
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.15;
    top: -200px;
    left: -200px;
    z-index: 0;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 440px;
    z-index: 1;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(12px);
}

/* SIDEBAR */
.sidebar-logo {
    padding: 32px 24px;
    font-size: 24px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    color: transparent;
}

.sidebar-nav {
    flex: 1;
    padding: 0 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.sidebar-nav a:hover {
    background-color: var(--bg-glass-hover);
    color: var(--text-main);
}

.sidebar-nav a.active {
    background-color: var(--primary-light);
    color: var(--primary);
    border-left: 3px solid var(--primary);
}

.sidebar-user {
    padding: 24px;
    border-top: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-info-flex {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar-circle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
}

/* CARDS */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.card.glass {
    background: rgba(22, 24, 32, 0.7);
    backdrop-filter: blur(12px);
}

.summary-card {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.02) 0%, rgba(255,255,255,0) 100%);
    z-index: 0;
    pointer-events: none;
}

.summary-card > * {
    position: relative;
    z-index: 1;
}

.summary-card.interactive:hover {
    cursor: pointer;
    border-color: var(--warning);
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.15);
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background: var(--primary-light);
    color: var(--primary);
    margin-bottom: 12px;
}

.card-icon.success { background: var(--success-light); color: var(--success); }
.card-icon.danger { background: var(--danger-light); color: var(--danger); }
.card-icon.warning { background: var(--warning-light); color: var(--warning); }
.card-icon.purple { background: rgba(139,92,246,0.15); color: #8b5cf6; }

.card-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

/* TABLES */
.data-table-wrapper {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    background-color: rgba(255,255,255,0.02);
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-glass);
}

.data-table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-glass);
    vertical-align: middle;
}

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

.data-table tbody tr:hover {
    background-color: var(--bg-glass-hover);
}

/* BUTTONS */
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    padding: 10px 20px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-main);
    border-radius: var(--radius-md);
    padding: 10px 20px;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

.btn-danger {
    background: var(--danger);
    color: white;
    border-radius: var(--radius-md);
    padding: 10px 20px;
    font-weight: 500;
    transition: var(--transition);
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-text {
    background: transparent;
    color: var(--primary);
    font-weight: 500;
    transition: var(--transition);
}

.btn-text:hover {
    text-decoration: underline;
}

.btn-icon {
    background: transparent;
    color: var(--text-muted);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

/* BADGES */
.badge-cat {
    border-radius: var(--radius-full);
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

.badge-plan {
    border-radius: var(--radius-full);
    padding: 2px 10px;
    font-size: 10px;
    text-transform: uppercase;
    font-weight: 700;
    color: white;
}

.badge-plan.free { background: var(--text-muted); }
.badge-plan.pro { background: var(--gradient-primary); }
.badge-plan.business { background: linear-gradient(135deg, #f59e0b, #d97706); }

/* MODALS */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    padding: 32px;
    transform: scale(0.95);
    transition: var(--transition);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

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

.modal-header h2 {
    margin: 0;
    font-size: 20px;
}

/* TOASTS */
#toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    min-width: 250px;
    box-shadow: var(--shadow-card);
    animation: slideInRight 0.3s forwards;
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }
.toast.warning { border-left: 4px solid var(--warning); }

/* FORMS */
.custom-form input,
.custom-form select,
.custom-form textarea {
    width: 100%;
    background: #1a1b23;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-main);
    font-size: 14px;
    transition: var(--transition);
}

.custom-form input:focus,
.custom-form select:focus,
.custom-form textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
    outline: none;
}

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

.form-group label {
    display: block;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    font-weight: 600;
}

/* PROGRESS */
.progress-bar {
    background: var(--bg-glass);
    border-radius: var(--radius-full);
    height: 8px;
    overflow: hidden;
    width: 100%;
}

.progress-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.5s ease;
}

.progress-fill.safe { background: var(--success); }
.progress-fill.warning { background: var(--warning); }
.progress-fill.danger { background: var(--danger); }

/* UTILS */
.w-full { width: 100%; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.col-span-2 { grid-column: span 2; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-purple { color: var(--secondary); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-muted); }
.bold { font-weight: bold; }

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

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

/* ANIMATIONS */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.view {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

/* LOADING */
#app-loading {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-dark);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-glass);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* UPGRADE PROMPT */
.upgrade-prompt {
    background: rgba(99,102,241,0.1);
    border: 1px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
}

.pro-feature-lock {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--warning);
    font-size: 12px;
    font-weight: 600;
    margin-left: 8px;
}

/* EMPTY STATES */
.empty-state {
    text-align: center;
    padding: 64px 24px;
    background: var(--bg-card);
    border: 1px dashed var(--border-glass);
    border-radius: var(--radius-lg);
    color: var(--text-muted);
}
.empty-state i {
    font-size: 48px;
    color: var(--primary);
    opacity: 0.5;
    margin-bottom: 16px;
}
.empty-state p {
    margin-bottom: 24px;
    font-size: 16px;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .col-span-2 {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: 60px;
        flex-direction: row;
        z-index: 100;
        border-right: none;
        border-top: 1px solid var(--border-glass);
        background: rgba(13, 14, 20, 0.95);
        backdrop-filter: blur(10px);
    }
    
    .sidebar-logo { display: none; }
    .sidebar-user { display: none; }
    
    .sidebar-nav {
        flex-direction: row;
        padding: 0;
        overflow-x: auto;
        overflow-y: hidden;
        align-items: center;
        gap: 0;
    }
    
    .sidebar-nav a {
        padding: 16px;
        flex-direction: column;
        border-radius: 0;
        border-left: none;
        font-size: 0;
        min-width: 60px;
        justify-content: center;
    }
    
    .sidebar-nav a i {
        font-size: 20px;
    }
    
    .sidebar-nav a.active {
        border-left: none;
        border-top: 3px solid var(--primary);
        background: var(--bg-glass);
    }
    
    .main-content {
        padding: 16px;
        padding-bottom: 80px;
    }
    
    .card {
        padding: 16px;
    }
    
    .summary-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .data-table {
        font-size: 13px;
        min-width: 600px;
    }
    
    .modal {
        width: calc(100% - 32px);
        margin: 16px;
        padding: 24px;
    }
    
    #auth-container {
        padding: 16px;
    }
    
    .auth-card {
        padding: 24px;
        max-width: 100%;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
}