/**
 * NTTC Portal - Main Stylesheet
 * Nestlé Technical Training Centre, Sagamu
 * 
 * Design tokens derived from the physical NTTC campus.
 * No frameworks. No component libraries. Real CSS.
 */

/* ============================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================ */
:root {
    /* Colors - derived from NTTC campus */
    --color-bg: #f0f0ee;           /* Off-white, like building walls */
    --color-surface: #ffffff;       /* Content panels */
    --color-nav: #2d3038;           /* Deep charcoal navigation */
    --color-nav-hover: #3d4048;
    --color-text: #1a1a1a;          /* Near-black body text */
    --color-text-muted: #6b7280;    /* Secondary text, concrete grey */
    --color-accent: #d4a017;        /* Muted amber - campus yellow bollards */
    --color-accent-dark: #b8900f;
    --color-border: #d1d0ce;        /* Subtle borders */
    --color-danger: #b91c1c;        /* Errors only */
    --color-danger-light: #fef2f2;
    --color-success: #15803d;       /* Success states only */
    --color-success-light: #f0fdf4;
    --color-warning: #d97706;
    --color-warning-light: #fffbeb;
    --color-info: #1d4ed8;
    --color-info-light: #eff6ff;
    --color-theme-toggle-bg: transparent;
    --color-theme-toggle-border: var(--color-border);
}

[data-theme="dark"] {
    --color-bg: #0f1117;
    --color-surface: #1a1d27;
    --color-nav: #0a0d14;
    --color-nav-hover: #141924;
    --color-text: #e8e6e1;
    --color-text-muted: #9ca3af;
    --color-accent: #e8b422;
    --color-accent-dark: #c99612;
    --color-border: #2d3038;
    --color-danger: #ef4444;
    --color-danger-light: #2a1414;
    --color-success: #22c55e;
    --color-success-light: #112117;
    --color-warning: #f59e0b;
    --color-warning-light: #2a2210;
    --color-info: #60a5fa;
    --color-info-light: #101b2d;
    --color-theme-toggle-bg: #1a1d27;
    --color-theme-toggle-border: #2d3038;
}

:root {
    /* Typography */
    --font-heading: 'Georgia', serif;
    --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Borders */
    --radius-sm: 3px;
    --radius-md: 4px;
    --radius-lg: 6px;
    
    /* Shadows - subtle, not overdone */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 4px rgba(0,0,0,0.08);
    
    /* Layout */
    --sidebar-width: 240px;
    --header-height: 56px;
    --max-content-width: 1200px;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Theme toggle */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-theme-toggle-border);
    background: var(--color-theme-toggle-bg);
    color: var(--color-text);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
}

.theme-toggle:hover {
    background: var(--color-bg);
}

.auth-theme-toggle-wrap {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1200;
}

[data-theme="dark"] .panel,
[data-theme="dark"] .login-form,
[data-theme="dark"] .top-header,
[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-textarea,
[data-theme="dark"] table,
[data-theme="dark"] .modal-content {
    background: var(--color-surface);
    color: var(--color-text);
}

[data-theme="dark"] thead {
    background: #131722;
}

[data-theme="dark"] tbody tr:hover {
    background: rgba(255,255,255,0.03);
}

[data-theme="dark"] .network-status-offline {
    background: #3a2b08;
    color: #f6d26b;
}

[data-theme="dark"] .network-status-online {
    background: #102417;
    color: #7ce8a1;
}

[data-theme="dark"] .announcement-urgent,
[data-theme="dark"] .alert-info,
[data-theme="dark"] .alert-warning,
[data-theme="dark"] .alert-success,
[data-theme="dark"] .alert-error {
    box-shadow: none;
}

[data-theme="dark"] .upload-zone {
    background: #141924;
}

[data-theme="dark"] .status-inactive {
    background: #2a1414;
    color: #ef9a9a;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    margin: 0 0 var(--space-md) 0;
    color: var(--color-text);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.375rem; }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

p {
    margin: 0 0 var(--space-md) 0;
}

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

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================================
   LAYOUT - APP SHELL
   ============================================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-nav);
    color: #fff;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: var(--space-lg);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    display: block;
}

.sidebar-logo span {
    display: block;
    font-size: 0.75rem;
    font-family: var(--font-body);
    font-weight: 400;
    color: rgba(255,255,255,0.6);
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md) 0;
    overflow-y: auto;
}

.sidebar-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar-nav a {
    display: block;
    padding: var(--space-sm) var(--space-lg);
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.875rem;
    transition: background-color 0.15s, color 0.15s;
}

.sidebar-nav a:hover {
    background: var(--color-nav-hover);
    color: #fff;
    text-decoration: none;
}

.sidebar-nav a.active {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border-left: 3px solid var(--color-accent);
    padding-left: calc(var(--space-lg) - 3px);
}

.sidebar-nav-label {
    padding: var(--space-md) var(--space-lg) var(--space-xs);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255,255,255,0.4);
}

.sidebar-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.8125rem;
}

.sidebar-footer .user-name {
    color: #fff;
    font-weight: 500;
}

.sidebar-footer .user-role {
    color: rgba(255,255,255,0.6);
    font-size: 0.75rem;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.top-header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    z-index: 50;
}

.page-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.content-area {
    flex: 1;
    padding: var(--space-xl);
    max-width: var(--max-content-width);
    width: 100%;
}

/* Full-width content (no max-width) */
.content-area.full-width {
    max-width: none;
}

/* ============================================================
   NOTIFICATIONS BELL
   ============================================================ */
.notification-bell {
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    color: var(--color-text-muted);
}

.notification-bell:hover {
    color: var(--color-text);
}

.notification-bell svg {
    width: 20px;
    height: 20px;
}

.notification-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-danger);
    color: #fff;
    font-size: 0.625rem;
    font-weight: 600;
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.notification-badge:empty {
    display: none;
}

/* ============================================================
   FORMS
   ============================================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-text);
}

.form-label .required {
    color: var(--color-danger);
}

.form-hint {
    display: block;
    margin-top: var(--space-xs);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(212, 160, 23, 0.15);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-danger);
}

.form-error {
    color: var(--color-danger);
    font-size: 0.8125rem;
    margin-top: var(--space-xs);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    padding-right: calc(var(--space-md) * 2 + 12px);
}

.form-checkbox,
.form-radio {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-checkbox input,
.form-radio input {
    margin-top: 3px;
    cursor: pointer;
}

.form-row {
    display: grid;
    gap: var(--space-lg);
}

.form-row.two-col {
    grid-template-columns: 1fr 1fr;
}

@media (max-width: 600px) {
    .form-row.two-col {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s;
}

.btn:hover {
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-accent);
    color: #000;
    border-color: var(--color-accent);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg);
    border-color: var(--color-text-muted);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
    border-color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
    background: #991b1b;
    border-color: #991b1b;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* ============================================================
   TABLES
   ============================================================ */
.table-container {
    overflow-x: auto;
    margin: var(--space-md) 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

thead {
    background: var(--color-bg);
}

th {
    text-align: left;
    padding: var(--space-sm) var(--space-md);
    font-weight: 600;
    color: var(--color-text);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

td {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

tbody tr:hover {
    background: rgba(0,0,0,0.02);
}

/* Table with no hover */
table.no-hover tbody tr:hover {
    background: transparent;
}

/* ============================================================
   STATUS BADGES
   ============================================================ */
.status {
    display: inline-block;
    padding: 2px var(--space-sm);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.status-pending {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.status-submitted,
.status-under-review {
    background: var(--color-info-light);
    color: var(--color-info);
}

.status-graded,
.status-complete {
    background: var(--color-success-light);
    color: var(--color-success);
}

.status-not-started {
    background: var(--color-bg);
    color: var(--color-text-muted);
}

.status-draft {
    background: var(--color-bg);
    color: var(--color-text-muted);
}

.status-signed-off {
    background: var(--color-success-light);
    color: var(--color-success);
}

.status-active {
    background: var(--color-success-light);
    color: var(--color-success);
}

.status-inactive {
    background: var(--color-bg);
    color: var(--color-text-muted);
}

/* ============================================================
   ALERTS / FLASH MESSAGES
   ============================================================ */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
}

.alert-success {
    background: var(--color-success-light);
    color: var(--color-success);
    border: 1px solid currentColor;
}

.alert-error {
    background: var(--color-danger-light);
    color: var(--color-danger);
    border: 1px solid currentColor;
}

.alert-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
    border: 1px solid currentColor;
}

.alert-info {
    background: var(--color-info-light);
    color: var(--color-info);
    border: 1px solid currentColor;
}

/* ============================================================
   PANELS / CARDS (use sparingly)
   ============================================================ */
.panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.panel-header {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.panel-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

/* ============================================================
   DEADLINE COUNTDOWN
   ============================================================ */
.deadline {
    font-size: 0.8125rem;
}

.deadline-urgent {
    color: var(--color-danger);
    font-weight: 500;
}

.deadline-soon {
    color: var(--color-warning);
}

.deadline-ok {
    color: var(--color-text-muted);
}

/* ============================================================
   FILE UPLOAD ZONE
   ============================================================ */
.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s, background-color 0.15s;
}

.upload-zone:hover {
    border-color: var(--color-accent);
    background: rgba(212, 160, 23, 0.03);
}

.upload-zone.dragover {
    border-color: var(--color-accent);
    background: rgba(212, 160, 23, 0.08);
}

.upload-zone-text {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.upload-zone-hint {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.upload-zone input[type="file"] {
    display: none;
}

/* ============================================================
   EMPTY STATES
   ============================================================ */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--color-text-muted);
}

.empty-state p {
    margin: 0;
    font-size: 0.9375rem;
}

/* ============================================================
   E-CLASS REMINDER BANNER
   ============================================================ */
.eclass-banner {
    background: var(--color-accent);
    color: #000;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.eclass-banner-text {
    font-weight: 500;
}

.eclass-banner .btn {
    background: #000;
    color: var(--color-accent);
    border-color: #000;
}

/* ============================================================
   NETWORK STATUS BANNER
   ============================================================ */
.network-status-banner {
    display: none;
    padding: 0.4rem var(--space-xl);
    font-size: 0.8125rem;
    font-weight: 500;
    border-bottom: 1px solid var(--color-border);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.network-status-banner.visible {
    display: block;
    opacity: 1;
}

.network-status-offline {
    background: #fef3c7;
    color: #92400e;
}

.network-status-online {
    background: #dcfce7;
    color: #166534;
}

/* ============================================================
   LOGIN PAGE
   ============================================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.login-container {
    width: 100%;
    max-width: 380px;
}

.login-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-header h1 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.login-header p {
    color: var(--color-text-muted);
    margin: 0;
    font-size: 0.875rem;
}

.login-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.login-footer {
    text-align: center;
    margin-top: var(--space-lg);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* Assessor login variant */
.login-page.assessor-login .login-form {
    border-top: 3px solid var(--color-accent);
}

.login-page.assessor-login .login-header h1::after {
    content: " (External)";
    font-weight: 400;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ============================================================
   ERROR PAGE
   ============================================================ */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.error-container {
    text-align: center;
    max-width: 400px;
}

.error-container h1 {
    font-size: 4rem;
    color: var(--color-text-muted);
    margin-bottom: 0;
}

.error-container h2 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.error-container p {
    color: var(--color-text-muted);
}

/* ============================================================
   PROGRESS BAR (for portfolio completion)
   ============================================================ */
.progress-bar {
    height: 8px;
    background: var(--color-bg);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

/* ============================================================
   SKELETON SCREENS
   Strategy: server renders real content, skeletons are used for
   subsequent dynamic JS loads/refetches in this architecture.
   ============================================================ */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.skeleton {
    background: linear-gradient(
        90deg,
        #e5e7eb 0%,
        #f3f4f6 50%,
        #e5e7eb 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.4s linear infinite;
    border-radius: 4px;
}

[data-theme="dark"] .skeleton {
    background: linear-gradient(
        90deg,
        #202532 0%,
        #2a3142 50%,
        #202532 100%
    );
    background-size: 200% 100%;
}

.skeleton-line { height: 12px; margin-bottom: 8px; }
.skeleton-line:last-child { margin-bottom: 0; }
.skeleton-line.short { width: 35%; }
.skeleton-line.medium { width: 60%; }
.skeleton-line.long { width: 100%; }

.skeleton-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
}

.skeleton-announcement-title { height: 18px; width: 45%; margin-bottom: 12px; }
.skeleton-announcement-meta { height: 11px; width: 32%; margin-top: 12px; }
.skeleton-hidden { display: none !important; }

/* ============================================================
   GRADE DISPLAY
   ============================================================ */
.grade {
    font-weight: 600;
}

.grade-excellent {
    color: var(--color-success);
}

.grade-good {
    color: var(--color-accent-dark);
}

.grade-pass {
    color: var(--color-warning);
}

.grade-fail {
    color: var(--color-danger);
}

/* ============================================================
   MOBILE NAVIGATION TOGGLE
   ============================================================ */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
    color: var(--color-text);
}

.mobile-nav-toggle svg {
    width: 24px;
    height: 24px;
}

/* ============================================================
   RESPONSIVE
   Breakpoints used in audit:
   - 1280px desktop
   - 768px tablet / iPad
   - 375px iPhone
   - 320px small Android
   ============================================================ */

/* Ensure iOS does not auto-zoom inputs */
.form-input,
.form-select,
.form-textarea {
    font-size: 16px;
}

/* Base tap target improvements */
.btn {
    min-height: 44px;
}

.upload-zone {
    width: 100%;
    min-height: 150px;
}

canvas {
    max-width: 100%;
}

#sig-canvas,
#reset-sig-canvas {
    width: 100%;
    display: block;
}

#sig-clear,
#reset-sig-clear {
    min-height: 48px;
}

/* Tablet and below: navigation drawer + stacked forms */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 100%;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-nav-toggle {
        display: block;
    }
    
    .content-area {
        padding: var(--space-md);
    }
    
    .top-header {
        padding: 0 var(--space-md);
    }

    .network-status-banner {
        padding: 0.4rem var(--space-md);
    }
    
    .form-row.two-col {
        grid-template-columns: 1fr;
    }

    .btn {
        min-height: 48px;
    }

    /* CSS-only stacked card tables using data-label attributes */
    .table-container {
        overflow: visible;
    }

    table,
    table thead,
    table tbody,
    table th,
    table td,
    table tr {
        display: block;
        width: 100%;
    }

    table thead {
        display: none;
    }

    table tbody tr {
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: var(--space-sm);
        margin-bottom: var(--space-sm);
    }

    table tbody tr:hover {
        background: var(--color-surface);
    }

    table td {
        border: none;
        border-bottom: 1px solid var(--color-border);
        padding: 0.5rem 0;
        text-align: left !important;
        white-space: normal;
    }

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

    table td::before {
        content: attr(data-label);
        display: block;
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--color-text-muted);
        margin-bottom: 0.2rem;
        text-transform: uppercase;
        letter-spacing: 0.02em;
    }

    /* Full-screen modals on mobile */
    .modal {
        align-items: stretch !important;
        justify-content: stretch !important;
    }

    .modal-content {
        width: 100% !important;
        max-width: none !important;
        height: 100% !important;
        max-height: none !important;
        margin: 0 !important;
        border-radius: 0 !important;
    }
}

/* Small iPhone width */
@media (max-width: 375px) {
    .content-area {
        padding: var(--space-sm);
    }

    .panel {
        padding: var(--space-md);
    }

    .top-header {
        padding: 0 var(--space-sm);
    }

    /* Collapse ad-hoc inline grids used across dashboard pages */
    [style*="grid-template-columns: 1fr 1fr"],
    [style*="grid-template-columns: repeat(3, 1fr)"],
    [style*="grid-template-columns: repeat(4, 1fr)"],
    [style*="grid-template-columns: 2fr 1fr"],
    [style*="grid-template-columns: 1fr 400px"] {
        grid-template-columns: 1fr !important;
    }
}

/* Small Android width floor */
@media (max-width: 320px) {
    body {
        min-width: 320px;
    }

    .page-title {
        font-size: 1rem;
    }

    .btn {
        font-size: 0.8125rem;
    }
}

/* Large desktop refinement */
@media (min-width: 1280px) {
    .content-area {
        max-width: 1280px;
    }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
    .sidebar,
    .top-header,
    .mobile-nav-toggle,
    .btn,
    .notification-bell {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-area {
        padding: 0;
        max-width: none;
    }
    
    body {
        background: #fff;
        color: #000;
    }
    
    .panel {
        border: 1px solid #ccc;
        break-inside: avoid;
    }
    
    a {
        color: #000;
        text-decoration: none;
    }
    
    table {
        font-size: 10pt;
    }
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.text-muted { color: var(--color-text-muted); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }

.text-sm { font-size: 0.8125rem; }
.text-lg { font-size: 1.125rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-md { margin-top: var(--space-md); }
.mb-md { margin-bottom: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }

.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-end { display: flex; justify-content: flex-end; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }

.hidden { display: none; }

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

/* Mobile sidebar overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.sidebar-overlay.active {
    display: block;
}

@media (max-width: 768px) {
    .sidebar.open + .main-content .sidebar-overlay {
        display: block;
    }
}