/* ============================================
   Assembly Line Production Tracker - Kaizen UI
   Based on Kaizen UI/UX Guidelines
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    /* Brand Colors */
    --brand-primary: #C53A3A;
    --brand-primary-dark: #A72E2E;
    --brand-primary-hover: #8B2A2A;

    /* Neutrals */
    --neutral-100: #F6F7F8;
    --neutral-200: #EBEDEF;
    --neutral-300: #E6E9EC;
    --neutral-400: #D1D5DB;
    --neutral-600: #6B7280;
    --neutral-700: #4B5563;
    --text-default: #111827;
    --white: #FFFFFF;

    /* Semantic Colors */
    --success: #16A34A;
    --success-light: #DCFCE7;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --error: #DC2626;
    --error-light: #FEE2E2;
    --info: #2563EB;
    --info-light: #DBEAFE;
    --pending: #9CA3AF;
    --pending-light: #F3F4F6;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 999px;

    /* Shadows */
    --shadow-soft: 0 6px 18px rgba(16,24,40,0.06);
    --shadow-medium: 0 8px 24px rgba(16,24,40,0.12);

    /* Legacy aliases for backward compatibility */
    --primary: var(--brand-primary);
    --primary-light: var(--brand-primary);
    --primary-dark: var(--brand-primary-dark);
    --danger: var(--error);
    --danger-bg: var(--error-light);
    --success-bg: var(--success-light);
    --warning-bg: var(--warning-light);
    --info-bg: var(--info-light);
    --gray-50: var(--neutral-100);
    --gray-100: var(--neutral-200);
    --gray-200: var(--neutral-300);
    --gray-300: var(--neutral-400);
    --gray-400: var(--neutral-600);
    --gray-500: var(--neutral-600);
    --gray-600: var(--neutral-700);
    --gray-700: var(--neutral-700);
    --gray-800: var(--text-default);
    --radius: var(--radius-md);
    --shadow: var(--shadow-soft);
    --shadow-md: var(--shadow-medium);
}

body {
    font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    color: var(--text-default);
    background: var(--neutral-100);
    line-height: 1.5;
}

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

/* --- Navbar --- */
.navbar {
    display: flex;
    align-items: center;
    background: var(--white);
    color: var(--text-default);
    padding: 0 1.25rem;
    height: 60px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-soft);
}

.nav-brand {
    display: flex;
    align-items: center;
}
.nav-brand a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-default);
    font-size: 1.1rem;
    font-weight: 600;
    white-space: nowrap;
}
.nav-brand a:hover { text-decoration: none; }
.nav-logo {
    height: 36px;
    width: auto;
}
.nav-title {
    display: inline;
}
@media (max-width: 480px) {
    .nav-title { display: none; }
    .nav-logo { height: 32px; }
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-default);
    font-size: 1.5rem;
    cursor: pointer;
    margin-left: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-left: auto;
}

.nav-links > a, .nav-dropdown > a {
    color: var(--neutral-700);
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
}
.nav-links > a:hover, .nav-dropdown > a:hover {
    background: var(--neutral-200);
    color: var(--text-default);
    text-decoration: none;
}
.nav-links > a.active, .nav-dropdown > a.active {
    background: var(--neutral-300);
    color: var(--text-default);
    font-weight: 600;
}

.nav-dropdown {
    position: relative;
}
.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    min-width: 200px;
    box-shadow: var(--shadow-medium);
    border-radius: var(--radius-lg);
    overflow: hidden;
    z-index: 200;
    margin-top: 4px;
}
.nav-dropdown:hover .dropdown-content { display: block; }
.dropdown-content a {
    display: block;
    padding: 0.6rem 1rem;
    color: var(--neutral-700);
    font-size: 0.875rem;
}
.dropdown-content a:hover {
    background: var(--neutral-200);
    color: var(--text-default);
    text-decoration: none;
}

/* --- Container --- */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem;
}

/* --- Page Header --- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.page-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-default);
}

/* --- Section Headers (Kaizen style) --- */
.section-header {
    padding: 12px 16px;
    background: var(--neutral-100);
    border-left: 4px solid var(--brand-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    margin-bottom: 1rem;
}
.section-header i {
    color: var(--brand-primary);
    font-size: 18px;
}

/* --- Cards --- */
.card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    padding: 1.25rem;
    margin-bottom: 1rem;
}
.card-header {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--neutral-300);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* --- Summary Cards Grid --- */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.summary-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    padding: 1rem 1.25rem;
    border-left: 4px solid var(--brand-primary);
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.summary-card h3 {
    font-size: 0.8rem;
    color: var(--neutral-600);
    margin-bottom: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}
.summary-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-default);
}
.summary-card.success { border-left-color: var(--success); }
.summary-card.danger { border-left-color: var(--error); }
.summary-card.warning { border-left-color: var(--warning); }
.summary-card.info { border-left-color: var(--info); }

/* --- Progress Bar --- */
.progress-bar {
    height: 8px;
    background: var(--neutral-300);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}
.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s;
}
.progress-fill.green { background: var(--success); }
.progress-fill.red { background: var(--error); }
.progress-fill.yellow { background: var(--warning); }

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

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}
th, td {
    padding: 0.6rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--neutral-300);
}
th {
    background: var(--neutral-200);
    font-weight: 600;
    color: var(--neutral-700);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    white-space: nowrap;
}
tbody tr:hover { background: var(--neutral-100); }

.table-compact th, .table-compact td { padding: 0.4rem 0.5rem; }

/* Numeric alignment - ensure both th and td have same padding for alignment */
td.num, th.num {
    text-align: right !important;
    white-space: nowrap;
    padding-left: 0.5rem;
    padding-right: 0.75rem;
}
table th, table td {
    vertical-align: middle;
    box-sizing: border-box;
}

/* Cumulative row */
tr.cumulative-row {
    background: var(--neutral-200);
    font-weight: 600;
}
tr.cumulative-row td { border-top: 2px solid var(--neutral-400); }

/* Variance coloring */
.variance-positive { color: var(--success); font-weight: 600; }
.variance-negative { color: var(--error); font-weight: 600; }
.variance-cell-positive { background: var(--success-light); }
.variance-cell-negative { background: var(--error-light); }

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
}
@media (max-width: 600px) {
    .quick-actions {
        flex-direction: column;
    }
    .quick-actions .btn {
        width: 100%;
        text-align: center;
    }
}

/* --- Forms --- */
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--neutral-700);
    font-size: 0.875rem;
}
.form-group label i {
    color: var(--neutral-600);
    font-size: 14px;
}
.form-group .required {
    color: var(--error);
}
.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
}
.form-row .form-group { flex: 1; min-width: 150px; }

input[type="text"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--neutral-400);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--white);
    transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--info);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}
input.invalid, select.invalid, textarea.invalid {
    border-color: var(--error);
}
input.invalid:focus, select.invalid:focus, textarea.invalid:focus {
    box-shadow: 0 0 0 3px rgba(220,38,38,0.15);
}
textarea { resize: vertical; min-height: 80px; }

.hint {
    font-size: 12px;
    color: var(--neutral-600);
    margin-top: 4px;
}
.field-error {
    font-size: 12px;
    color: var(--error);
    margin-top: 4px;
}

/* Date input with DD-MMM-YYYY display */
.date-text-input {
    cursor: pointer;
    font-weight: 600;
    background: var(--white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23666' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 0a.5.5 0 0 1 .5.5V1h8V.5a.5.5 0 0 1 1 0V1h1a2 2 0 0 1 2 2v11a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2V3a2 2 0 0 1 2-2h1V.5a.5.5 0 0 1 .5-.5zM1 4v10a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1V4H1z'/%3E%3C/svg%3E") no-repeat right 10px center;
    padding-right: 35px !important;
}
.date-text-input:hover {
    border-color: var(--primary);
}
.date-text-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(197, 58, 58, 0.15);
}

/* Inline inputs in tables */
table input[type="number"],
table input[type="text"],
table select {
    width: 80px;
    padding: 6px 8px;
    font-size: 0.8rem;
    border-radius: var(--radius-md);
}
table select { width: 140px; }

/* --- Buttons (Kaizen 3-tier system) --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    font-family: inherit;
    box-shadow: var(--shadow-soft);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus { outline: 3px solid rgba(197,58,58,0.25); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* Primary - Brand Red (main action, one per page) */
.btn-primary {
    background: var(--brand-primary);
    color: var(--white);
}
.btn-primary:hover { background: var(--brand-primary-dark); }

/* Secondary - Neutral outline (supportive action) */
.btn-secondary {
    background: var(--white);
    color: var(--text-default);
    border: 1px solid var(--neutral-400);
}
.btn-secondary:hover { background: var(--neutral-200); }

/* Tertiary - Text/link style (lowest priority) */
.btn-tertiary {
    background: transparent;
    color: var(--brand-primary);
    box-shadow: none;
    padding: 8px 12px;
}
.btn-tertiary:hover {
    background: var(--neutral-200);
    text-decoration: none;
}

/* Semantic buttons */
.btn-success { background: var(--success); color: var(--white); }
.btn-success:hover { background: #15803d; }
.btn-danger { background: var(--error); color: var(--white); }
.btn-danger:hover { background: #b91c1c; }
.btn-warning { background: var(--warning); color: var(--text-default); }
.btn-warning:hover { background: #d97706; }

/* Sizes */
.btn-sm { padding: 6px 10px; font-size: 0.8rem; border-radius: var(--radius-md); }
.btn-lg { padding: 12px 24px; font-size: 1rem; }

/* Outline variant */
.btn-outline {
    background: transparent;
    border: 1px solid var(--neutral-400);
    color: var(--neutral-700);
    box-shadow: none;
}
.btn-outline:hover {
    background: var(--neutral-200);
}

/* --- Tabs --- */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--neutral-300);
    margin-bottom: 1rem;
    flex-wrap: wrap;
}
.tab-btn {
    padding: 0.75rem 1.25rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--neutral-600);
    transition: color 0.15s, border-color 0.15s;
    font-family: inherit;
}
.tab-btn:hover { color: var(--text-default); }
.tab-btn.active {
    color: var(--brand-primary);
    border-bottom-color: var(--brand-primary);
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* --- Alerts / Messages --- */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alert-success { background: var(--success-light); color: #166534; }
.alert-danger { background: var(--error-light); color: #991b1b; }
.alert-warning { background: var(--warning-light); color: #92400e; }
.alert-info { background: var(--info-light); color: #1e40af; }

/* --- Date Selector Bar --- */
.date-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}
.date-bar label { font-weight: 600; }
.date-bar .shift-info {
    font-size: 0.875rem;
    color: var(--neutral-700);
    background: var(--neutral-200);
    padding: 8px 12px;
    border-radius: var(--radius-md);
}

/* --- Reason Field --- */
.reason-container {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}
.reason-other-input {
    display: none;
    width: 120px !important;
}
.reason-other-input.visible { display: inline-block; }

/* --- Expandable Detail --- */
.expandable-toggle {
    cursor: pointer;
    user-select: none;
}
.expandable-toggle td:first-child::before {
    content: '\25B6';
    display: inline-block;
    margin-right: 0.5rem;
    transition: transform 0.2s;
    font-size: 0.65rem;
    color: var(--neutral-500);
}
.expandable-toggle.open td:first-child::before { transform: rotate(90deg); }
.expandable-detail { display: none; }
.expandable-detail.open { display: table-row; }

/* --- Chart Container --- */
.chart-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 1rem auto;
}
.chart-container canvas {
    width: 100% !important;
}

/* --- Toast Notification --- */
.toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-medium);
    z-index: 9999;
    animation: slideUp 0.3s ease;
    max-width: 350px;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--error); }
@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* --- Filter Bar --- */
.filter-bar {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
    background: var(--white);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
}

/* --- Badges (Kaizen pill style with white text) --- */
.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 600;
    color: var(--white);
}
.badge-success, .bg-success { background: var(--success); color: var(--white); }
.badge-danger, .bg-error { background: var(--error); color: var(--white); }
.badge-warning, .bg-warning { background: var(--warning); color: var(--text-default); }
.badge-info, .bg-info { background: var(--info); color: var(--white); }
.badge-pending, .bg-pending { background: var(--pending); color: var(--white); }

/* --- KPI Cards (Dashboard style) --- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.kpi-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.kpi-card .label {
    font-size: 0.8rem;
    color: var(--neutral-600);
}
.kpi-card .value {
    font-size: 1.5rem;
    font-weight: 700;
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--neutral-600);
}
.empty-state p {
    font-size: 0.9rem;
}

/* --- Utility Classes --- */
.muted { color: var(--neutral-600); font-size: 13px; }
.text-success { color: var(--success); }
.text-danger { color: var(--error); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 0.5rem;
        box-shadow: var(--shadow-medium);
    }
    .nav-links.open { display: flex; }
    .nav-dropdown .dropdown-content {
        position: static;
        box-shadow: none;
        background: var(--neutral-100);
        border-radius: var(--radius-md);
        margin-top: 4px;
    }
    .dropdown-content a { color: var(--neutral-700); }
    .dropdown-content a:hover { background: var(--neutral-200); }
    .nav-dropdown:hover .dropdown-content { display: none; }
    .nav-dropdown.open .dropdown-content { display: block; }

    .form-row { flex-direction: column; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .summary-cards { grid-template-columns: 1fr; }
    .kpi-grid { grid-template-columns: 1fr; }

    /* Mobile: Tables can use horizontal scroll or stack as cards */
    .table-responsive { -webkit-overflow-scrolling: touch; }
}

/* --- Print --- */
@media print {
    .navbar, .nav-toggle, .app-footer, .btn, .date-bar input,
    .filter-bar, .no-print { display: none !important; }
    body { font-size: 11px; background: var(--white); }
    .container { max-width: 100%; padding: 0; }
    .card { box-shadow: none; border: 1px solid var(--neutral-400); break-inside: avoid; }
    table { font-size: 10px; }
    th { background: var(--neutral-200) !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .variance-cell-positive { background: var(--success-light) !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .variance-cell-negative { background: var(--error-light) !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .badge { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
}

/* --- Spinner/Loading State --- */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--neutral-300);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
.btn .spinner {
    width: 16px;
    height: 16px;
    border-width: 2px;
    border-top-color: currentColor;
}