/**
 * Atlas Dashboard - Industrial Minimal Theme
 * Strict Requirements:
 * - Gray/black only
 * - No rounded corners (border-radius: 0)
 * - No gradients, glassmorphism, glow, blur, animations, shadows
 * - No over-designed cards
 * - Typography: Inter / Segoe UI / IBM Plex Sans
 * - Font weights: 400 / 500 / 600 only
 * - Tight, consistent spacing
 * - Strict grid alignment
 */

:root {
    --color-bg: #0a0a0a;
    --color-bg-secondary: #121212;
    --color-bg-tertiary: #1a1a1a;
    --color-border: #2a2a2a;
    --color-border-light: #333333;
    --color-text: #e0e0e0;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #707070;
    --color-primary: #ffffff;
    --color-success: #4a4a4a;
    --color-error: #666666;
    --color-disabled: #3a3a3a;
    
    --font-family: 'Inter', 'Segoe UI', 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    
    --topbar-height: 56px;
    --sidebar-width: 240px;
}

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

html,
body {
    height: 100%;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: var(--font-weight-normal);
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* NO ROUNDED CORNERS ANYWHERE */
*,
*::before,
*::after {
    border-radius: 0 !important;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    color: var(--color-primary);
}

h1 { font-size: 24px; margin-bottom: var(--spacing-lg); }
h2 { font-size: 20px; margin-bottom: var(--spacing-md); }
h3 { font-size: 16px; margin-bottom: var(--spacing-md); }
h4 { font-size: 14px; margin-bottom: var(--spacing-sm); }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-text);
    text-decoration: none;
}

a:hover {
    color: var(--color-primary);
}

/* Layout Structure */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Top Navigation Bar */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topbar-height);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 100;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 101;
}

.hamburger span {
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition: none;
}

.hamburger:hover span {
    background: var(--color-primary);
}

.topbar-brand {
    font-size: 16px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: 13px;
}

.topbar-user span {
    color: var(--color-text);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--topbar-height));
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    z-index: 50;
    transition: transform 0.2s ease;
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .main-content.sidebar-open {
        margin-left: var(--sidebar-width);
    }
}

.sidebar-nav {
    list-style: none;
    padding: var(--spacing-md) 0;
}

.sidebar-nav-item {
    border-bottom: 1px solid var(--color-border);
}

.sidebar-nav-link {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: none;
}

.sidebar-nav-link:hover,
.sidebar-nav-link.active {
    background: var(--color-bg-tertiary);
    color: var(--color-primary);
}

/* Main Content Area */
.main-content {
    margin-top: var(--topbar-height);
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl);
    min-height: calc(100vh - var(--topbar-height));
    transition: margin-left 0.2s ease;
}

.main-content.sidebar-collapsed {
    margin-left: 0;
}

/* Content Header */
.content-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.content-title {
    font-size: 20px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

thead {
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-size: 12px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
}

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

tbody tr:hover {
    background: var(--color-bg-tertiary);
}

/* Panels */
.panel {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.panel-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-tertiary);
}

.panel-title {
    font-size: 13px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.panel-body {
    padding: var(--spacing-lg);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: 12px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 13px;
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--color-border-light);
    background: var(--color-bg-secondary);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background: var(--color-disabled);
    color: var(--color-text-tertiary);
    cursor: not-allowed;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Custom File Input */
.file-input-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    overflow: hidden;
}

.file-input-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: none;
    min-height: 40px;
}

.file-input-label:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary);
    border-color: var(--color-border-light);
}

.file-input-label:active {
    background: var(--color-bg-tertiary);
}

.file-input-filename {
    margin-top: var(--spacing-sm);
    font-size: 12px;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: none;
}

.btn:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary);
    border-color: var(--color-border-light);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

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

.btn:disabled,
.btn-disabled {
    background: var(--color-disabled);
    color: var(--color-text-tertiary);
    border-color: var(--color-disabled);
    cursor: not-allowed;
}

.btn:disabled:hover,
.btn-disabled:hover {
    background: var(--color-disabled);
    color: var(--color-text-tertiary);
    border-color: var(--color-disabled);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 12px;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Status Badges */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 11px;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid var(--color-border);
}

.badge-active {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    border-color: var(--color-border-light);
}

.badge-inactive {
    background: var(--color-disabled);
    color: var(--color-text-tertiary);
}

/* Flash Messages */
.flash-message {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    font-size: 13px;
}

.flash-success {
    border-color: var(--color-border-light);
    color: var(--color-text);
}

.flash-error {
    border-color: var(--color-error);
    color: var(--color-text);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-item {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
}

.stat-label {
    font-size: 11px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: 24px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

/* Empty State */
.empty-state {
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--color-text-tertiary);
}

/* Landing Page Specific */
.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.landing-header {
    padding: 80px 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.landing-title {
    font-size: 48px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.landing-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.landing-actions {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
}

.landing-features {
    padding: 60px 0;
}

.feature-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.feature-item {
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.feature-title {
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.landing-footer {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-links {
    list-style: none;
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.footer-links a {
    font-size: 12px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-copyright {
    font-size: 12px;
    color: var(--color-text-tertiary);
}

/* Auth Pages */
.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-xl);
}

.auth-box {
    width: 100%;
    max-width: 400px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-xl);
}

.auth-title {
    font-size: 20px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.auth-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-secondary); }
.text-small { font-size: 12px; }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

/* Custom Scrollbar - Chrome/Edge/Safari */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
    border-left: 1px solid var(--color-border);
}

::-webkit-scrollbar-thumb {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-light);
}

::-webkit-scrollbar-corner {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    border-left: 1px solid var(--color-border);
}

/* Custom Scrollbar - Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-bg-tertiary) var(--color-bg);
}