/* CSS Reset & Variables */
:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #131a2e;
    --bg-card: rgba(22, 30, 49, 0.6);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(99, 102, 241, 0.5);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.3);
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --info: #06b6d4;
    --info-bg: rgba(6, 182, 212, 0.15);
    
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-headings: 'Outfit', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 260px;
}

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

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    font-weight: 600;
    letter-spacing: -0.02em;
}

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

/* Sidebar styling */
.sidebar {
    width: var(--sidebar-width);
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(16px);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--info));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px var(--primary-glow);
}

.brand-icon svg {
    width: 22px;
    height: 22px;
    fill: white;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(to right, #ffffff, #9ca3af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.menu-item a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.menu-item a svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-secondary);
    fill: none;
    transition: var(--transition);
}

.menu-item a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.menu-item.active a {
    color: white;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(6, 182, 212, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.25);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.05);
}

.menu-item.active a svg {
    stroke: #818cf8;
}

.sidebar-footer {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.user-avatar {
    width: 38px;
    height: 38px;
    background: #374151;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--primary);
    border: 1px solid var(--border-color);
}

.user-info {
    font-size: 0.85rem;
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.user-role {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2.5rem 3rem;
    min-height: 100vh;
    transition: var(--transition);
    max-width: 1600px;
    width: calc(100% - var(--sidebar-width));
}

/* Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.page-title h1 {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.page-title p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.metric-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.metric-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25), 0 0 15px rgba(99, 102, 241, 0.05);
}

.metric-info h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-family: var(--font-headings);
    font-size: 1.85rem;
    font-weight: 700;
    color: white;
}

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.metric-icon.purple {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
}

.metric-icon.blue {
    background: rgba(6, 182, 212, 0.15);
    color: #22d3ee;
}

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

.metric-icon svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
}

/* Sections */
.section-container {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.75rem;
    margin-bottom: 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

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

.section-title {
    font-size: 1.25rem;
    color: white;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #1f2937;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.65rem 1.25rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn:hover {
    background: #374151;
    color: white;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    border: none;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), #4338ca);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-danger {
    background: var(--danger-bg);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 6px;
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    padding: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}

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

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

tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* Badges */
.badge {
    display: inline-flex;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    align-items: center;
    gap: 0.35rem;
}

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

.badge-danger {
    background: var(--danger-bg);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-warning {
    background: var(--warning-bg);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-info {
    background: var(--info-bg);
    color: #22d3ee;
    border: 1px solid rgba(6, 182, 212, 0.2);
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

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

.form-control {
    width: 100%;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

select.form-control option {
    background-color: var(--bg-secondary);
    color: white;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 7, 18, 0.6);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 100%;
    max-width: 550px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: var(--transition);
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.modal-title {
    font-size: 1.25rem;
    color: white;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: white;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.75rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.25rem;
}

/* Login Page Spec */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    min-height: 100vh;
}

.login-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(99, 102, 241, 0.05);
    animation: slideUp 0.5s ease-out;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    display: inline-flex;
    margin-bottom: 1rem;
}

.alert {
    padding: 0.85rem 1.25rem;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.alert-danger {
    background: var(--danger-bg);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.25);
}

.alert-success {
    background: var(--success-bg);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.25);
}

/* Setup Screen styling */
.setup-container {
    width: 100%;
    max-width: 650px;
    margin: 4rem auto;
    padding: 0 1.5rem;
}

.setup-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.setup-step {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
}

.setup-step:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

/* File explorer layouts */
.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.file-item {
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(99, 102, 241, 0.2);
}

.file-icon {
    width: 36px;
    height: 36px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-icon svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
}

.file-details {
    flex: 1;
    margin-left: 1rem;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    align-items: center;
}

.file-name {
    font-weight: 500;
    color: white;
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.file-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

/* Filters bar */
.filters-bar {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filter-select {
    min-width: 200px;
}

/* Custom empty state */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    stroke: currentColor;
    fill: none;
    margin-bottom: 1rem;
}

/* Activity Chart styles (Custom dynamic SVG styling) */
.chart-container {
    height: 200px;
    width: 100%;
    margin-top: 1rem;
}

.chart-svg {
    width: 100%;
    height: 100%;
    overflow: visible;
}

.chart-grid-line {
    stroke: rgba(255, 255, 255, 0.03);
    stroke-width: 1;
}

.chart-line {
    fill: none;
    stroke: url(#chart-gradient);
    stroke-width: 3;
    stroke-linecap: round;
    animation: drawLine 1.5s ease-out forwards;
}

.chart-area {
    fill: url(#area-gradient);
    opacity: 0.2;
}

.chart-dot {
    fill: var(--primary);
    stroke: var(--bg-secondary);
    stroke-width: 2;
    r: 5;
    transition: var(--transition);
}

.chart-dot:hover {
    r: 7;
    fill: var(--info);
    cursor: pointer;
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .sidebar {
        width: 80px;
        padding: 2rem 0.5rem;
    }
    
    .brand-name, .user-info, .sidebar-footer, .menu-item span {
        display: none;
    }
    
    .brand {
        justify-content: center;
        margin-bottom: 2rem;
    }
    
    .menu-item a {
        justify-content: center;
        padding: 0.85rem;
    }
    
    .main-content {
        margin-left: 80px;
        width: calc(100% - 80px);
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: 60px;
        position: fixed;
        bottom: 0;
        top: auto;
        left: 0;
        flex-direction: row;
        padding: 0.5rem 1rem;
        border-right: none;
        border-top: 1px solid var(--border-color);
        justify-content: space-around;
        align-items: center;
    }
    
    .brand, .sidebar-footer {
        display: none;
    }
    
    .menu-list {
        flex-direction: row;
        width: 100%;
        justify-content: space-around;
        gap: 0;
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 1.5rem;
        padding-bottom: 80px; /* Space for fixed bottom menu */
    }
    
    .top-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .file-details {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }
}

/* Animations */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes drawLine {
    from { stroke-dashoffset: 1000; }
    to { stroke-dashoffset: 0; }
}

/* Pagination styling */
.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.pagination-nav {
    display: flex;
    gap: 0.35rem;
    align-items: center;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 0.5rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.pagination-link:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
    color: white;
}

.pagination-link.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

.pagination-link.disabled {
    opacity: 0.3;
    pointer-events: none;
}