/* ===== Fluent 2 / Windows 11 Design System ===== */

:root {
    /* Fluent Blue palette */
    --color-primary: #0078d4;
    --color-primary-hover: #106ebe;
    --color-primary-pressed: #005a9e;
    --color-primary-light: #deecf9;

    /* Surfaces & backgrounds */
    --color-bg: #f0f4ff;
    --color-surface: rgba(255, 255, 255, 0.78);
    --color-surface-solid: #ffffff;

    /* Text */
    --color-text: #242424;
    --color-text-secondary: #616161;

    /* Borders */
    --color-border: rgba(0, 0, 0, 0.06);
    --color-border-strong: rgba(0, 0, 0, 0.12);
    --color-highlight-border: rgba(255, 255, 255, 0.65);

    /* Semantic */
    --color-danger: #d13438;
    --color-danger-hover: #a4262c;
    --color-warning: #f7630c;
    --color-success: #0f7b0f;
    --color-info: #0078d4;

    /* Radii (Fluent corners) */
    --radius: 8px;
    --radius-sm: 6px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows (Windows 11 elevation) */
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);

    /* Acrylic material */
    --acrylic-bg: rgba(255, 255, 255, 0.72);
    --acrylic-blur: blur(20px) saturate(150%);

    /* Layout */
    --sidebar-width: 240px;
    --header-height: 56px;

    /* Fluent easing */
    --transition: 250ms cubic-bezier(0.33, 0, 0.67, 1);
    --transition-fast: 150ms cubic-bezier(0.33, 0, 0.67, 1);
}

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

body {
    font-family: 'Segoe UI Variable', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    background: linear-gradient(135deg, #f0f4ff 0%, #e8edf5 100%);
    background-attachment: fixed;
    color: var(--color-text);
    line-height: 1.5;
    font-size: 14px;
    min-height: 100vh;
}

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

h1 { font-size: 1.5rem; font-weight: 600; }
h2 { font-size: 1.25rem; font-weight: 600; }
h3 { font-size: 1rem; font-weight: 600; }

/* ===== Buttons ===== */
button, .btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: var(--color-surface-solid);
    color: var(--color-text);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
    user-select: none;
}
button:hover, .btn:hover {
    background: #f5f5f5;
    border-color: rgba(0, 0, 0, 0.16);
}
button:active, .btn:active {
    background: #ebebeb;
    transform: scale(0.98);
}
button i, .btn i {
    font-size: 16px;
    line-height: 1;
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 1px 2px rgba(0, 120, 212, 0.24);
}
.btn-primary:hover {
    background: var(--color-primary-hover);
    box-shadow: 0 2px 4px rgba(0, 120, 212, 0.32);
}
.btn-primary:active {
    background: var(--color-primary-pressed);
}

.btn-danger {
    background: var(--color-danger);
    color: #ffffff;
    border-color: transparent;
}
.btn-danger:hover { background: var(--color-danger-hover); }

.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-icon {
    padding: 6px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
}
.btn-icon:hover { background: rgba(0, 0, 0, 0.05); }

/* ===== Form elements (Fluent underline focus) ===== */
input, select, textarea {
    padding: 7px 12px;
    border: 1px solid var(--color-border-strong);
    border-bottom: 2px solid rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    background: var(--color-surface-solid);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-bottom-color: var(--color-primary);
    box-shadow: 0 1px 0 0 var(--color-primary);
}

textarea { resize: vertical; min-height: 80px; }

/* ===== Badges ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}
.badge-backlog { background: #f5f5f5; color: #616161; }
.badge-assigned { background: var(--color-primary-light); color: #0078d4; }
.badge-in_progress { background: #fff4ce; color: #8a6914; }
.badge-done { background: #dff6dd; color: #0e700e; }
.badge-active { background: #dff6dd; color: #0e700e; }
.badge-closed { background: #f5f5f5; color: #616161; }
.badge-archived { background: #fde7e9; color: #a4262c; }
.badge-leader { background: #fff0d4; color: #b8860b; gap: 3px; }

/* ===== Avatar ===== */
.avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-primary-light);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
}

/* ===== Card (acrylic surface) ===== */
.card {
    background: var(--acrylic-bg);
    backdrop-filter: var(--acrylic-blur);
    -webkit-backdrop-filter: var(--acrylic-blur);
    border: 1px solid var(--color-highlight-border);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition), transform var(--transition);
}

/* ===== Empty/Loading states ===== */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text-secondary);
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
    color: var(--color-text-secondary);
}

/* ===== Form groups ===== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
}
.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
}

/* ===== Modal (Fluent flyout) ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.32);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal {
    background: var(--acrylic-bg);
    backdrop-filter: var(--acrylic-blur);
    -webkit-backdrop-filter: var(--acrylic-blur);
    border: 1px solid var(--color-highlight-border);
    border-radius: var(--radius-xl);
    padding: 24px;
    width: 90%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 250ms cubic-bezier(0.33, 0, 0.67, 1);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 24px;
}

@keyframes modalSlideIn {
    from { transform: translateY(16px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ===== Toast (Windows 11 notification style) ===== */
.toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    background: var(--color-surface-solid);
    color: var(--color-text);
    font-size: 13px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border);
    animation: toastSlideIn 250ms cubic-bezier(0.33, 0, 0.67, 1);
}
.toast-error {
    border-left: 3px solid var(--color-danger);
    color: var(--color-danger);
}
.toast-success {
    border-left: 3px solid var(--color-success);
    color: var(--color-success);
}

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

/* ===== Pagination ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 0;
}
.pagination button { min-width: 36px; justify-content: center; }
.pagination .current { font-weight: 600; color: var(--color-primary); }

/* ===== Screen reader ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ===== View Tabs ===== */
.view-tabs {
    display: inline-flex;
    gap: 0;
    background: rgba(0, 0, 0, 0.04);
    border-radius: var(--radius-sm);
    padding: 3px;
}
.view-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
    cursor: pointer;
}
.view-tab:hover {
    color: var(--color-text);
    background: rgba(0, 0, 0, 0.04);
    text-decoration: none;
}
.view-tab.active {
    background: var(--color-surface-solid);
    color: var(--color-primary);
    box-shadow: var(--shadow);
    font-weight: 600;
}
.view-tab i {
    font-size: 14px;
}

/* ===== Backlog Table ===== */
.backlog-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--acrylic-bg);
    backdrop-filter: var(--acrylic-blur);
    -webkit-backdrop-filter: var(--acrylic-blur);
    border: 1px solid var(--color-highlight-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.backlog-table th {
    text-align: left;
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    background: rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid var(--color-border-strong);
}
.backlog-table td {
    padding: 10px 14px;
    font-size: 13px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}
.backlog-table tr:last-child td {
    border-bottom: none;
}
.backlog-table tr:hover td {
    background: rgba(0, 120, 212, 0.04);
}
.backlog-table .task-id {
    color: var(--color-text-secondary);
    font-weight: 400;
    white-space: nowrap;
}
.backlog-table .task-title-cell {
    font-weight: 500;
}
.backlog-table .assignee-list {
    font-size: 12px;
    color: var(--color-text-secondary);
}
.backlog-table tr {
    cursor: pointer;
    transition: background var(--transition-fast);
}

/* ===== Project Icon ===== */
.project-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
}
.project-icon-sm {
    width: 32px;
    height: 32px;
}
.project-icon-default {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--color-primary-light);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 18px;
    flex-shrink: 0;
}
.project-icon-default.project-icon-sm {
    width: 32px;
    height: 32px;
    font-size: 15px;
}

/* ===== Customer Indicator ===== */
.customer-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--color-text-secondary);
}
.customer-indicator i {
    font-size: 14px;
}

/* ===== Customer Section ===== */
.customer-section {
    margin-top: 12px;
    padding: 12px;
    background: var(--acrylic-bg);
    backdrop-filter: var(--acrylic-blur);
    -webkit-backdrop-filter: var(--acrylic-blur);
    border: 1px solid var(--color-highlight-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.customer-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
}
.customer-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
}
.customer-item:last-child {
    border-bottom: none;
}

/* ===== Icon Upload ===== */
.icon-upload-area {
    width: 96px;
    height: 96px;
    border: 2px dashed var(--color-border-strong);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    overflow: hidden;
    transition: border-color var(--transition-fast);
}
.icon-upload-area:hover {
    border-color: var(--color-primary);
}
.icon-upload-area img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.icon-upload-area i {
    font-size: 28px;
    color: var(--color-text-secondary);
}

/* ===== Detail rows ===== */
.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid var(--color-border);
}
.detail-row:last-child { border-bottom: none; }
.detail-label {
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* --- Role badges (group mapping page) --- */
.role-badge-tier-admin { background: var(--color-danger); }
.role-badge-tier-manager { background: var(--color-warning); }
.role-badge-tier-user { background: var(--color-success); }

/* --- Group mappings tabs --- */
.gm-tabs { display: flex; gap: 0; margin-bottom: 16px; border-bottom: 2px solid var(--color-border); }
.gm-tab { background: none; border: none; padding: 8px 16px; cursor: pointer; font-weight: 500; color: var(--color-text-secondary); border-bottom: 2px solid transparent; margin-bottom: -2px; font-size: 13px; }
.gm-tab.active { border-bottom-color: var(--color-primary); color: var(--color-primary); }
.gm-tab:hover:not(.active) { color: var(--color-primary); opacity: 0.7; }