@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* Executive-grade calm monochrome palette (Apple / Notion / Stripe Dashboard style) */
    --r-bg: #f9f9fb;               /* Calm, warm-gray matte background */
    --r-surface: #ffffff;          /* Flat pure white card surfaces */
    --r-sidebar-bg: #f4f4f5;       /* Notion-style subtle gray sidebar */
    --r-border: #e4e4e7;           /* Extremely thin, soft border */
    --r-border-hover: #d4d4d8;
    
    --r-text: #18181b;             /* Off-black / Graphite */
    --r-text-muted: #52525b;       /* Muted charcoal */
    --r-text-subtle: #8e8e93;      /* Subtle warm gray */
    
    /* Elegant blue and brand details */
    --r-primary: #18181b;          /* Monochrome graphite primary */
    --r-primary-hover: #27272a;
    --r-accent-blue: #2563eb;      /* Restrained active blue highlight */
    
    --r-success: #15803d;          /* Calm muted green */
    --r-success-subtle: #f0fdf4;
    
    --r-warning: #b45309;          /* Calm muted amber */
    --r-warning-subtle: #fffbeb;
    
    --r-danger: #b91c1c;           /* Calm muted red */
    --r-danger-subtle: #fef2f2;
    
    --sidebar-width: 240px;
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', SFMono-Regular, Consolas, monospace;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--r-bg);
    color: var(--r-text);
    display: flex;
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.08);
    border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.15);
}

/* Sidebar Navigation */
.sidebar {
    width: var(--sidebar-width);
    background: var(--r-sidebar-bg);
    border-right: 1px solid var(--r-border);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.5rem 1rem 0.5rem;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    text-decoration: none;
    transition: opacity 0.15s;
}

.sidebar-logo:hover {
    opacity: 0.8;
}

.sidebar-logo-text {
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: -0.02em;
    color: var(--r-text);
}

.sidebar-section-title {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--r-text-subtle);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 1.25rem 0.5rem 0.4rem 0.5rem;
}

.sidebar-section-title:first-of-type {
    margin-top: 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    color: var(--r-text-muted);
    text-decoration: none;
    font-size: 0.825rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.nav-link svg {
    color: var(--r-text-subtle);
    transition: color 0.15s;
}

.nav-link:hover {
    background: rgba(0, 0, 0, 0.03);
    color: var(--r-text);
}

.nav-link:hover svg {
    color: var(--r-text);
}

.nav-link.active {
    background: #ffffff;
    color: var(--r-text);
    font-weight: 600;
    border-color: var(--r-border);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.nav-link.active svg {
    color: var(--r-accent-blue);
}

/* Layout Architecture */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.top-bar {
    height: 52px;
    padding: 0 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--r-border);
    background: #ffffff;
    z-index: 90;
}

.top-bar-search {
    position: relative;
    width: 100%;
    max-width: 280px;
}

.top-bar-search input {
    width: 100%;
    background: var(--r-bg);
    border: 1px solid var(--r-border);
    color: var(--r-text);
    font-size: 0.775rem;
    padding: 0.35rem 0.75rem 0.35rem 1.85rem;
    border-radius: var(--radius-sm);
    outline: none;
    transition: all 0.15s ease;
}

.top-bar-search input:focus {
    background: #ffffff;
    border-color: var(--r-text-subtle);
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.env-badge {
    font-size: 0.6rem;
    font-weight: 700;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.env-badge.staging {
    background: var(--r-warning-subtle);
    color: var(--r-warning);
    border: 1px solid rgba(180, 83, 9, 0.15);
}

.env-badge.production {
    background: var(--r-danger-subtle);
    color: var(--r-danger);
    border: 1px solid rgba(185, 28, 28, 0.15);
}

.env-badge.local {
    background: var(--r-success-subtle);
    color: var(--r-success);
    border: 1px solid rgba(21, 128, 61, 0.15);
}

/* Page Containers */
.page-container {
    flex: 1;
    overflow-y: auto;
    padding: 1.75rem;
}

/* Cards (Notion / Vercel style) */
.card {
    background: var(--r-surface);
    border: 1px solid var(--r-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
    position: relative;
    transition: border-color 0.15s ease;
}

.card:hover {
    border-color: var(--r-border-hover);
}

.card-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--r-text);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Tables and Data Presentation */
.table-card {
    background: var(--r-surface);
    border: 1px solid var(--r-border);
    border-radius: var(--radius-md);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
    overflow: hidden;
    margin-bottom: 1.25rem;
}

.table-container {
    width: 100%;
    overflow-x: auto;
}

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

th {
    background: #fafafa;
    padding: 0.65rem 0.85rem;
    color: var(--r-text-muted);
    font-size: 0.675rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--r-border);
}

td {
    padding: 0.75rem 0.85rem;
    border-bottom: 1px solid #f4f4f5;
    font-size: 0.8rem;
    color: var(--r-text);
    transition: background-color 0.15s;
}

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

tr:hover td {
    background: #f9f9fb;
}

/* KPI Dashboard Grids */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.875rem;
    margin-bottom: 1.25rem;
}

.kpi-card {
    background: var(--r-surface);
    border: 1px solid var(--r-border);
    border-radius: var(--radius-md);
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100px;
    transition: all 0.15s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.kpi-card:hover {
    border-color: var(--r-border-hover);
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.kpi-label {
    font-size: 0.675rem;
    font-weight: 600;
    color: var(--r-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.kpi-value {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--r-text);
    margin-top: 0.25rem;
    letter-spacing: -0.02em;
}

.kpi-meta {
    font-size: 0.7rem;
    color: var(--r-text-subtle);
    margin-top: 0.2rem;
}

/* Modern Pill Badges */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    border: 1px solid transparent;
}

.badge-info, .badge-primary {
    background: #eff6ff;
    color: #1d4ed8;
    border-color: rgba(37, 99, 235, 0.12);
}

.badge-success {
    background: var(--r-success-subtle);
    color: var(--r-success);
    border-color: rgba(21, 128, 61, 0.12);
}

.badge-warning {
    background: var(--r-warning-subtle);
    color: var(--r-warning);
    border-color: rgba(180, 83, 9, 0.12);
}

.badge-danger {
    background: var(--r-danger-subtle);
    color: var(--r-danger);
    border-color: rgba(185, 28, 28, 0.12);
}

/* Clean, trustable Button Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    border: 1px solid transparent;
    outline: none;
}

.btn-primary {
    background: var(--r-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--r-primary-hover);
}

.btn-outline {
    background: transparent;
    border-color: var(--r-border);
    color: var(--r-text-muted);
}

.btn-outline:hover {
    background: rgba(0, 0, 0, 0.02);
    border-color: var(--r-border-hover);
    color: var(--r-text);
}

/* Timeline Components */
.timeline-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.timeline-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid #f4f4f5;
    background: #ffffff;
    align-items: center;
    transition: border-color 0.15s;
}

.timeline-item:hover {
    border-color: var(--r-border-hover);
}

.timeline-icon {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.7rem;
}

.timeline-details {
    flex: 1;
}

.timeline-title {
    font-size: 0.775rem;
    font-weight: 600;
    color: var(--r-text);
}

.timeline-meta {
    font-size: 0.675rem;
    color: var(--r-text-subtle);
    margin-top: 0.05rem;
    display: flex;
    gap: 0.5rem;
}

/* Input Fields and Selects */
input, select, textarea {
    font-family: var(--font-sans);
}