/* Merkezi SaaS — Chrome light design system */
:root {
    --chrome-blue: #1a73e8;
    --chrome-blue-hover: #1557b0;
    --chrome-blue-light: #e8f0fe;
    --chrome-blue-subtle: #f1f6fd;
    --chrome-red: #d93025;
    --chrome-yellow: #f9ab00;
    --chrome-green: #188038;
    --chrome-surface: #ffffff;
    --chrome-bg: #f8f9fa;
    --chrome-bg-alt: #f1f3f4;
    --chrome-border: #e0e3e7;
    --chrome-border-strong: #dadce0;
    --chrome-text: #202124;
    --chrome-text-secondary: #5f6368;
    --chrome-text-muted: #80868b;
    --chrome-shadow-sm: 0 1px 2px rgba(60, 64, 67, 0.08);
    --chrome-shadow: 0 1px 3px rgba(60, 64, 67, 0.12), 0 1px 2px rgba(60, 64, 67, 0.08);
    --chrome-shadow-lg: 0 4px 12px rgba(60, 64, 67, 0.12), 0 2px 4px rgba(60, 64, 67, 0.06);
    --chrome-radius: 16px;
    --chrome-radius-md: 12px;
    --chrome-radius-sm: 8px;
    --chrome-font: 'Inter', 'Roboto', 'Segoe UI', system-ui, sans-serif;
}

html, body {
    font-family: var(--chrome-font);
    margin: 0;
    background: var(--chrome-bg);
    color: var(--chrome-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#blazor-error-ui {
    background: var(--chrome-red);
    bottom: 0;
    box-shadow: var(--chrome-shadow-lg);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
    color: #fff;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

/* Loading */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    gap: 1.25rem;
    background: linear-gradient(180deg, #fff 0%, var(--chrome-bg) 100%);
    color: var(--chrome-text);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--chrome-blue-light);
    border-top-color: var(--chrome-blue);
    border-radius: 50%;
    animation: spin 0.65s linear infinite;
}

.loading-container p {
    color: var(--chrome-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

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

/* App shell */
.app-layout {
    background: var(--chrome-bg) !important;
}

.app-bar {
    background: rgba(255, 255, 255, 0.96) !important;
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--chrome-border) !important;
    color: var(--chrome-text) !important;
    box-shadow: var(--chrome-shadow-sm) !important;
}

.app-bar .mud-icon-button {
    color: var(--chrome-text-secondary) !important;
}

.app-bar .mud-icon-button:hover {
    background: var(--chrome-bg-alt) !important;
    color: var(--chrome-text) !important;
}

.app-brand {
    font-weight: 600 !important;
    letter-spacing: -0.03em !important;
    color: var(--chrome-text) !important;
    background: none !important;
    -webkit-text-fill-color: var(--chrome-text) !important;
}

.app-drawer {
    background: var(--chrome-surface) !important;
    border-right: 1px solid var(--chrome-border) !important;
    box-shadow: var(--chrome-shadow-sm);
}

.app-drawer .mud-nav-link {
    border-radius: 24px;
    margin: 2px 12px;
    padding: 8px 16px !important;
    font-weight: 500;
    color: var(--chrome-text-secondary) !important;
    transition: background 0.15s ease, color 0.15s ease;
}

.app-drawer .mud-nav-link .mud-nav-link-icon {
    color: var(--chrome-text-muted) !important;
}

.app-drawer .mud-nav-link:hover {
    background: var(--chrome-bg-alt) !important;
    color: var(--chrome-text) !important;
}

.app-drawer .mud-nav-link.active {
    background: var(--chrome-blue-light) !important;
    color: var(--chrome-blue) !important;
    font-weight: 600;
}

.app-drawer .mud-nav-link.active .mud-nav-link-icon {
    color: var(--chrome-blue) !important;
}

.chrome-nav .nav-brand-logo {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--chrome-blue) 0%, #4285f4 55%, var(--chrome-green) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--chrome-shadow-sm);
}

.chrome-nav .nav-brand-title {
    font-weight: 600;
    letter-spacing: -0.02em;
    font-size: 0.95rem;
    color: var(--chrome-text);
}

.chrome-nav .nav-section {
    color: var(--chrome-text-muted);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.app-main {
    min-height: 100vh;
    background: var(--chrome-bg);
}

.app-main .mud-container {
    max-width: 1280px;
}

/* Page chrome */
.page-header {
    padding-bottom: 0.75rem;
    margin-bottom: 0.25rem;
}

.page-title {
    font-weight: 600 !important;
    font-size: 1.75rem !important;
    letter-spacing: -0.03em !important;
    color: var(--chrome-text) !important;
    line-height: 1.2 !important;
}

.page-subtitle {
    color: var(--chrome-text-secondary) !important;
    font-size: 0.9rem !important;
}

.page-actions .mud-button-root {
    text-transform: none !important;
    font-weight: 500 !important;
    border-radius: var(--chrome-radius-sm) !important;
}

/* Cards & panels */
.chrome-card,
.chart-panel,
.activity-feed,
.summary-card,
.mud-paper.chrome-card {
    border-radius: var(--chrome-radius-md) !important;
    border: 1px solid var(--chrome-border) !important;
    box-shadow: var(--chrome-shadow-sm) !important;
    background: var(--chrome-surface) !important;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.chrome-card:hover {
    box-shadow: var(--chrome-shadow) !important;
    border-color: var(--chrome-border-strong) !important;
}

.chrome-data-grid,
.chrome-data-grid.mud-table {
    border-radius: var(--chrome-radius-md) !important;
    border: 1px solid var(--chrome-border) !important;
    overflow: hidden;
    background: var(--chrome-surface) !important;
    box-shadow: var(--chrome-shadow-sm) !important;
}

.chrome-data-grid .mud-table-head .mud-table-cell {
    background: var(--chrome-bg) !important;
    color: var(--chrome-text-secondary) !important;
    font-weight: 600 !important;
    font-size: 0.75rem !important;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--chrome-border) !important;
}

.chrome-data-grid .mud-table-row:hover {
    background: var(--chrome-blue-subtle) !important;
}

/* Stat widgets */
.stat-widget {
    border-radius: var(--chrome-radius-md) !important;
    border: 1px solid var(--chrome-border) !important;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    background: var(--chrome-surface) !important;
    color: var(--chrome-text) !important;
    box-shadow: var(--chrome-shadow-sm) !important;
}

.stat-widget:hover {
    transform: translateY(-1px);
    box-shadow: var(--chrome-shadow) !important;
}

.stat-widget--blue { border-top: 3px solid var(--chrome-blue) !important; }
.stat-widget--green { border-top: 3px solid var(--chrome-green) !important; }
.stat-widget--yellow { border-top: 3px solid var(--chrome-yellow) !important; }
.stat-widget--red { border-top: 3px solid var(--chrome-red) !important; }
.stat-widget--indigo { border-top: 3px solid #4285f4 !important; }
.stat-widget--teal { border-top: 3px solid #00acc1 !important; }
.stat-widget--amber { border-top: 3px solid var(--chrome-yellow) !important; }

.stat-widget-label {
    color: var(--chrome-text-muted) !important;
    font-size: 0.7rem !important;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.stat-widget-value {
    font-weight: 700 !important;
    letter-spacing: -0.02em;
    color: var(--chrome-text) !important;
}

.stat-widget-sub {
    color: var(--chrome-text-secondary) !important;
}

.stat-widget-icon {
    background: var(--chrome-blue-light) !important;
    color: var(--chrome-blue) !important;
    border-radius: 10px !important;
}

/* Login */
.login-layout {
    min-height: 100vh;
    background: linear-gradient(160deg, #ffffff 0%, var(--chrome-bg) 45%, var(--chrome-blue-subtle) 100%);
    position: relative;
    overflow: hidden;
}

.login-layout::before {
    content: '';
    position: absolute;
    top: -15%;
    right: -8%;
    width: 45%;
    height: 55%;
    background: radial-gradient(circle, rgba(26, 115, 232, 0.08) 0%, transparent 68%);
    pointer-events: none;
}

.login-layout::after {
    content: '';
    position: absolute;
    bottom: -12%;
    left: -8%;
    width: 40%;
    height: 45%;
    background: radial-gradient(circle, rgba(24, 128, 56, 0.06) 0%, transparent 68%);
    pointer-events: none;
}

.login-card {
    border-radius: var(--chrome-radius) !important;
    border: 1px solid var(--chrome-border) !important;
    box-shadow: var(--chrome-shadow-lg) !important;
    background: var(--chrome-surface) !important;
    position: relative;
    z-index: 1;
}

.login-logo {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--chrome-blue), #4285f4, var(--chrome-green));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--chrome-shadow);
}

.license-banner {
    border-radius: 0;
    margin: 0;
}

.license-lock {
    border-radius: var(--chrome-radius-md);
    max-width: 520px;
    margin: 4rem auto;
    border: 1px solid var(--chrome-border);
    background: var(--chrome-surface);
    box-shadow: var(--chrome-shadow);
}

.invoice-preview {
    border-radius: var(--chrome-radius-md);
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid var(--chrome-border);
    background: var(--chrome-surface);
}

.not-found-panel {
    text-align: center;
    padding: 4rem 2rem;
    max-width: 480px;
    margin: 3rem auto;
}

.not-found-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background: var(--chrome-blue-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--chrome-blue);
}

/* MudBlazor Chrome overrides */
.mud-button-root {
    text-transform: none !important;
    font-weight: 500 !important;
    letter-spacing: 0 !important;
}

.mud-button-filled-primary {
    border-radius: var(--chrome-radius-sm) !important;
    box-shadow: var(--chrome-shadow-sm) !important;
}

.mud-button-filled-primary:hover {
    box-shadow: var(--chrome-shadow) !important;
}

.mud-button-outlined {
    border-radius: var(--chrome-radius-sm) !important;
    border-color: var(--chrome-border-strong) !important;
}

.mud-input-outlined .mud-input-outlined-border {
    border-radius: var(--chrome-radius-sm) !important;
}

.mud-input-outlined:hover .mud-input-outlined-border {
    border-color: var(--chrome-text-muted) !important;
}

.mud-input-outlined.mud-input-focused .mud-input-outlined-border {
    border-color: var(--chrome-blue) !important;
    border-width: 2px !important;
}

.mud-chip {
    border-radius: 16px !important;
    font-weight: 500 !important;
}

.mud-alert {
    border-radius: var(--chrome-radius-sm) !important;
}

.mud-progress-linear {
    border-radius: 4px !important;
}

.mud-dialog .mud-paper {
    border-radius: var(--chrome-radius-md) !important;
    border: 1px solid var(--chrome-border);
    box-shadow: var(--chrome-shadow-lg) !important;
}

.mud-table-cell {
    border-color: var(--chrome-border) !important;
}

.mud-divider {
    border-color: var(--chrome-border) !important;
}

.mud-tooltip-root {
    font-size: 0.8rem !important;
}

@media print {
    .app-bar, .app-drawer, .mud-appbar, .mud-drawer {
        display: none !important;
    }
    .app-main {
        padding: 0 !important;
    }
    .invoice-preview {
        box-shadow: none !important;
        border: 1px solid #ccc;
    }
}