:root {
    --bg: #0f172a;
    --surface: #111827;
    --surface-soft: #1f2937;
    --surface-muted: #334155;
    --card: rgba(255, 255, 255, 0.92);
    --card-strong: #ffffff;
    --border: rgba(148, 163, 184, 0.18);
    --border-strong: rgba(148, 163, 184, 0.35);
    --text: #0f172a;
    --text-soft: #475569;
    --text-inverse: #f8fafc;
    --primary: #2563eb;
    --primary-soft: rgba(37, 99, 235, 0.14);
    --secondary: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --shadow-sm: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 18px 40px rgba(15, 23, 42, 0.12);
    --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.18);
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --sidebar-width: 296px;
    --sidebar-collapsed-width: 92px;
    --transition: 200ms ease;
    --transition-slow: 320ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.24), transparent 30%),
        radial-gradient(circle at top right, rgba(139, 92, 246, 0.18), transparent 28%),
        linear-gradient(180deg, #eef4ff 0%, #f8fafc 34%, #edf2ff 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

button,
input,
select,
textarea {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    cursor: pointer;
}

:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.35);
    outline-offset: 3px;
}

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: var(--space-6);
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(17, 24, 39, 0.96));
    color: var(--text-inverse);
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    transition: width var(--transition-slow), transform var(--transition-slow);
    z-index: 30;
}

.sidebar-header,
.sidebar-section,
.sidebar-nav,
.sidebar-summary {
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    gap: var(--space-4);
}

.brand-mark {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(139, 92, 246, 0.35));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
    font-size: 1.7rem;
}

.brand-copy strong {
    display: block;
    font-size: 1.05rem;
    font-weight: 700;
}

.brand-copy span,
.sidebar-label,
.nav-hint,
.status-card span {
    color: rgba(226, 232, 240, 0.72);
}

.brand-copy span,
.sidebar-label {
    font-size: 0.82rem;
}

.sidebar-label {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-4);
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    border-radius: var(--radius-md);
    padding: 0.95rem 1rem;
    color: rgba(226, 232, 240, 0.82);
    transition: background var(--transition), color var(--transition), transform var(--transition);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    transform: translateX(2px);
}

.nav-link.active {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.28), rgba(139, 92, 246, 0.28));
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
    color: #fff;
}

.nav-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.08);
    font-size: 1rem;
    flex-shrink: 0;
}

.nav-link.active .nav-icon {
    background: rgba(255, 255, 255, 0.14);
}

.nav-text-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.nav-text {
    font-weight: 600;
    font-size: 0.98rem;
}

.nav-hint {
    font-size: 0.78rem;
}

.status-card {
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: var(--space-4);
}

.status-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.status-card strong {
    display: block;
    color: #fff;
    font-size: 0.95rem;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: var(--success);
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.12);
}

.status-indicator.active {
    animation: pulse 2s infinite;
}

.main-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-6);
    padding: var(--space-6) var(--space-8);
    background: rgba(248, 250, 252, 0.72);
    border-bottom: 1px solid rgba(148, 163, 184, 0.14);
    backdrop-filter: blur(18px);
}

.topbar-left,
.topbar-right,
.page-heading,
.user-info,
.section-actions,
.hero-actions,
.split-actions,
.table-actions {
    display: flex;
}

.topbar-left {
    gap: var(--space-4);
    align-items: flex-start;
}

.topbar-right {
    gap: var(--space-4);
    align-items: center;
}

.page-heading {
    flex-direction: column;
    gap: var(--space-2);
}

.eyebrow,
.panel-eyebrow,
.table-meta span:first-child {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary);
}

#pageTitle {
    font-size: clamp(1.8rem, 3vw, 2.8rem);
    line-height: 1.1;
    font-weight: 800;
}

.page-subtitle,
.section-subtitle,
.hero-copy p,
.table-meta span:last-child,
.stat-meta,
.activity-meta,
.student-details,
.meeting-description,
.meeting-info,
.class-details,
.form-note,
.modal-subtitle,
.breadcrumbs li {
    color: var(--text-soft);
}

.page-subtitle {
    max-width: 760px;
}

.breadcrumbs ol {
    list-style: none;
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.breadcrumbs li:not(:last-child)::after {
    content: "/";
    margin-left: var(--space-2);
    color: rgba(71, 85, 105, 0.6);
}

.workspace {
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.content-section {
    display: none;
    animation: fadeInUp 260ms ease;
}

.content-section.active {
    display: block;
}

.hero-card,
.panel,
.user-section,
.stat-card,
.modal-content,
.notification {
    background: var(--card);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.hero-card {
    border-radius: var(--radius-xl);
    padding: clamp(1.5rem, 4vw, 2.5rem);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-8);
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.16), transparent 32%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(239, 246, 255, 0.96));
}

.hero-copy {
    max-width: 760px;
}

.hero-copy h2 {
    font-size: clamp(1.55rem, 2.4vw, 2.5rem);
    line-height: 1.2;
    margin-bottom: var(--space-3);
}

.hero-copy p {
    margin-bottom: 0;
    font-size: 1rem;
    max-width: 640px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.45rem 0.85rem;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.hero-actions,
.section-actions {
    gap: var(--space-3);
    align-items: center;
    flex-wrap: wrap;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
}

.stat-card {
    border-radius: var(--radius-md);
    padding: var(--space-5);
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
}

.stat-card__icon {
    width: 54px;
    height: 54px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    color: white;
    flex-shrink: 0;
}

.accent-blue { background: linear-gradient(135deg, #2563eb, #38bdf8); }
.accent-purple { background: linear-gradient(135deg, #8b5cf6, #ec4899); }
.accent-green { background: linear-gradient(135deg, #10b981, #22c55e); }
.accent-orange { background: linear-gradient(135deg, #f59e0b, #f97316); }

.stat-label {
    font-size: 0.84rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-soft);
    margin-bottom: var(--space-2);
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-meta {
    margin-bottom: 0;
    font-size: 0.92rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-4);
}

.panel {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.panel-hero {
    grid-column: span 7;
}

.chart-panel {
    min-height: 360px;
}

.panel-span-2 {
    grid-column: span 8;
}

.dashboard-grid > .panel:nth-child(2) {
    grid-column: span 5;
}

.dashboard-grid > .panel:nth-child(3),
.dashboard-grid > .panel:nth-child(4),
.dashboard-grid > .panel:nth-child(5) {
    grid-column: span 4;
}

.panel-header,
.table-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-5) var(--space-5) 0;
}

.table-meta {
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: var(--space-4);
}

.panel-title,
.section-title {
    font-size: clamp(1.2rem, 2vw, 1.75rem);
    font-weight: 700;
    line-height: 1.2;
}

.panel-body {
    padding: var(--space-5);
}

.chart-area {
    height: 320px;
}

.compact-chart {
    height: 300px;
}

.list-panel,
#recentActivity {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.student-item,
.class-card,
.meeting-item,
.activity-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-4);
    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: var(--radius-md);
    background: rgba(248, 250, 252, 0.72);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.student-item:hover,
.class-card:hover,
.meeting-item:hover,
.activity-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: rgba(37, 99, 235, 0.2);
}

.student-avatar,
.activity-icon,
.meeting-date {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    background: rgba(37, 99, 235, 0.12);
    color: var(--primary);
    flex-shrink: 0;
}

.meeting-date {
    text-align: center;
    background: rgba(15, 23, 42, 0.06);
    color: var(--text);
}

.meeting-day {
    font-weight: 800;
    font-size: 1.15rem;
    line-height: 1;
}

.meeting-month {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-soft);
}

.student-info,
.meeting-details,
.activity-content {
    flex: 1;
}

.student-name,
.meeting-title,
.class-name {
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.student-details,
.meeting-description,
.meeting-info,
.class-details,
.activity-text {
    font-size: 0.92rem;
}

.activity-text {
    margin-bottom: var(--space-1);
}

.activity-meta {
    font-size: 0.82rem;
}

.class-header,
.meeting-actions,
.student-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.class-badge,
.status-badge,
.action-badge,
.btn-status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.class-badge {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.status-badge.active,
.btn-status.completed { background: rgba(16, 185, 129, 0.12); color: var(--success); }
.status-badge.inactive,
.btn-status.cancelled { background: rgba(239, 68, 68, 0.12); color: var(--danger); }
.status-badge.graduated,
.status-badge.scheduled,
.btn-status.scheduled { background: rgba(37, 99, 235, 0.12); color: var(--primary); }
.status-badge.transferred,
.status-badge.completed { background: rgba(245, 158, 11, 0.12); color: var(--warning); }
.action-badge.create { background: rgba(16, 185, 129, 0.12); color: var(--success); }
.action-badge.update { background: rgba(37, 99, 235, 0.12); color: var(--primary); }
.action-badge.delete { background: rgba(239, 68, 68, 0.12); color: var(--danger); }
.action-badge.login { background: rgba(245, 158, 11, 0.12); color: var(--warning); }

.class-progress {
    margin-top: var(--space-4);
}

.progress-bar {
    width: 100%;
    height: 8px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.18);
    overflow: hidden;
    margin-bottom: var(--space-2);
}

.progress-fill {
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-soft);
}

.section-toolbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-6);
    margin-bottom: var(--space-5);
}

.search-field {
    min-width: min(100%, 280px);
    position: relative;
}

.search-field i {
    position: absolute;
    left: 1.1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-soft);
    pointer-events: none;
    z-index: 2;
}

.search-field input.form-input {
    padding-left: 3.4rem !important;
}

.filters-panel {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.filters-header {
    border-bottom: 1px solid var(--border);
    padding: var(--space-4) var(--space-5);
}

.filters-panel .panel-body {
    padding: var(--space-5);
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.filters-panel .form-label {
    color: var(--text-soft);
    font-size: 0.85rem;
    font-weight: 600;
}

.filters-panel .form-input {
    background: rgba(255, 255, 255, 0.72);
    border-color: var(--border);
    color: var(--text);
    border-radius: 8px;
    padding: 0.6rem 1rem;
}

.filters-panel .form-input:focus {
    border-color: var(--primary);
}

.filters-search-bar {
    border-top: 1px solid var(--border);
    padding-top: var(--space-4);
    margin-top: var(--space-4);
}

.table-panel {
    padding-bottom: var(--space-4);
}

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

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    min-width: 760px;
}

.data-table th,
.data-table td {
    padding: 1rem 1.1rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.14);
    text-align: left;
    vertical-align: middle;
}

.data-table th {
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-soft);
}

.data-table tbody tr {
    transition: background var(--transition);
}

.data-table tbody tr:hover {
    background: rgba(37, 99, 235, 0.04);
}

.btn-primary,
.ghost-button,
.icon-button,
.btn-icon {
    border: none;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.btn-primary,
.ghost-button {
    padding: 0.9rem 1.1rem;
    font-weight: 700;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.24);
}

.btn-primary:hover,
.ghost-button:hover,
.icon-button:hover,
.btn-icon:hover {
    transform: translateY(-1px);
}

.nav-link:focus-visible,
.btn-primary:focus-visible,
.ghost-button:focus-visible,
.icon-button:focus-visible,
.btn-icon:focus-visible,
.close-modal:focus-visible,
.logout-btn:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.28);
    outline-offset: 3px;
}

.ghost-button,
.icon-button,
.btn-icon {
    background: rgba(255, 255, 255, 0.74);
    color: var(--text);
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.icon-button,
.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
}

.full-width {
    width: 100%;
}

.user-section {
    padding: 0.6rem 0.75rem;
    border-radius: 18px;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.user-avatar {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.user-info {
    flex-direction: column;
}

.user-name {
    font-weight: 700;
}

.user-role {
    font-size: 0.82rem;
    color: var(--text-soft);
}

.logout-btn {
    background: transparent;
    border: none;
    color: var(--text-soft);
    font-size: 1rem;
}

.logout-btn:hover {
    color: var(--danger);
}

.modal-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background: rgba(15, 23, 42, 0.58);
    backdrop-filter: blur(10px);
    z-index: 50;
    transition: opacity var(--transition-slow);
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    width: min(100%, 540px);
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-height: 90vh;
    overflow-y: auto;
}

.auth-modal {
    width: min(100%, 460px);
}

.modal-lg {
    width: min(100%, 960px);
}

.modal-body-bg {
    background: #f8fafc;
    color: var(--text);
}
.modal-body-bg .form-label {
    color: var(--text-soft);
}
.modal-body-bg .form-input {
    background: #fff;
    border-color: var(--border);
    color: var(--text);
}
.modal-body-bg .form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-section {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(15, 23, 42, 0.02);
}
.form-section-header {
    padding: var(--space-4) var(--space-5);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    background: rgba(248, 250, 252, 0.5);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}
.form-section-header:hover {
    background: rgba(241, 245, 249, 0.8);
}
.form-section-header h4 {
    margin: 0;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--text);
}
.form-section-body {
    padding: var(--space-5);
    transition: all var(--transition);
}
.form-section.collapsed .form-section-body {
    display: none;
}
.form-section.collapsed .toggle-icon {
    transform: rotate(180deg);
}
.toggle-icon {
    transition: transform var(--transition);
    color: var(--text-soft);
}

.dropzone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius-md);
    padding: var(--space-8) var(--space-4);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    background: rgba(248, 250, 252, 0.5);
}
.dropzone:hover, .dropzone.dragover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.04);
}
.dropzone p {
    margin: 0 0 var(--space-2) 0;
    color: var(--text);
}
.dropzone-hint {
    font-size: 0.8rem;
    color: var(--text-soft);
}
.file-list {
    list-style: none;
    padding: 0;
    margin: var(--space-4) 0 0 0;
    min-height: 50px;
    transition: var(--transition);
}

.file-list.drag-over-list {
    background-color: var(--primary-soft);
    border: 1px dashed var(--primary);
    border-radius: var(--radius-sm);
}
.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3);
    background: rgba(248, 250, 252, 0.8);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-2);
    transition: var(--transition);
}

.file-item.existing-file[draggable="true"] {
    cursor: grab;
}

.file-item.existing-file[draggable="true"]:active {
    cursor: grabbing;
}

.file-item.dragging {
    opacity: 0.5;
    background: var(--surface-soft);
    border: 1px dashed var(--primary);
}

.file-item.drag-over-top {
    border-top: 2px solid var(--primary);
    transform: translateY(2px);
}

.file-item.drag-over-bottom {
    border-bottom: 2px solid var(--primary);
    transform: translateY(-2px);
}
.file-item span {
    font-size: 0.9rem;
    color: var(--text);
}
.file-item button {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
}

.form-footer-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-start;
}
.btn-success {
    background: var(--success);
    color: #fff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}
.btn-success:hover {
    background: #059669;
}

.modal-header {
    position: relative;
    padding: var(--space-8);
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.2), transparent 30%),
        linear-gradient(180deg, rgba(239, 246, 255, 0.92), rgba(255, 255, 255, 0.95));
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}

.modal-icon {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    background: rgba(37, 99, 235, 0.12);
    color: var(--primary);
    margin-bottom: var(--space-4);
    font-size: 1.5rem;
}

.modal-title {
    font-size: 1.6rem;
    line-height: 1.15;
    margin-bottom: var(--space-2);
}

.modal-body {
    padding: var(--space-8);
}

.close-modal {
    position: absolute;
    top: var(--space-5);
    right: var(--space-5);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(255, 255, 255, 0.72);
    color: var(--text);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    border: 1px solid rgba(148, 163, 184, 0.24);
    border-radius: 14px;
    background: #fff;
    padding: 0.95rem 1rem;
    color: var(--text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: rgba(37, 99, 235, 0.46);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.form-actions {
    margin-top: var(--space-6);
}

.split-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
}

.form-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
}

.form-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
}

.span-2 {
    grid-column: span 2;
}

.form-footer {
    margin-top: var(--space-5);
}

.form-note,
.form-error {
    font-size: 0.88rem;
}

.form-error {
    min-height: 1.2rem;
    color: var(--danger);
}

.notification {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: 60;
    max-width: 360px;
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
}

.notification.success { border-left: 4px solid var(--success); }
.notification.error { border-left: 4px solid var(--danger); }
.notification.warning { border-left: 4px solid var(--warning); }
.notification.info { border-left: 4px solid var(--info); }

.notification.fade-out {
    opacity: 0;
    transform: translateY(-6px);
}

.connected .status-indicator {
    background: var(--success);
}

.disconnected .status-indicator {
    background: var(--danger);
}

.sidebar-backdrop {
    display: none;
}

.desktop-only {
    display: inline-flex;
}

.mobile-only {
    display: none;
}

.hidden {
    display: none !important;
}

.loading {
    opacity: 0.66;
    pointer-events: none;
}

.text-danger {
    color: var(--danger) !important;
}

body.sidebar-collapsed .app-shell {
    grid-template-columns: var(--sidebar-collapsed-width) 1fr;
}

body.sidebar-collapsed .sidebar {
    padding-inline: var(--space-4);
}

body.sidebar-collapsed .brand-copy,
body.sidebar-collapsed .sidebar-label,
body.sidebar-collapsed .nav-text-wrap,
body.sidebar-collapsed .status-card div {
    display: none;
}

body.sidebar-collapsed .sidebar-header {
    align-items: center;
}

body.sidebar-collapsed .nav-link {
    justify-content: center;
    padding-inline: 0.6rem;
}

body.sidebar-collapsed .status-card {
    justify-content: center;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }
}

@media (max-width: 1280px) {
    .app-shell {
        grid-template-columns: 260px 1fr;
    }

    .panel-hero,
    .dashboard-grid > .panel:nth-child(2),
    .panel-span-2,
    .dashboard-grid > .panel:nth-child(3),
    .dashboard-grid > .panel:nth-child(4),
    .dashboard-grid > .panel:nth-child(5) {
        grid-column: span 6;
    }
}

@media (max-width: 960px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: min(86vw, 320px);
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }

    body.sidebar-open .sidebar {
        transform: translateX(0);
    }

    .sidebar-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.45);
        z-index: 25;
    }

    body.sidebar-open .sidebar-backdrop {
        display: block;
    }

    .desktop-only {
        display: none;
    }

    .mobile-only {
        display: inline-flex;
    }

    .topbar,
    .workspace {
        padding: var(--space-6);
    }

    .topbar {
        flex-direction: column;
    }

    .topbar-right,
    .section-toolbar {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .section-actions {
        width: 100%;
    }

    .hero-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .panel-hero,
    .dashboard-grid > .panel:nth-child(2),
    .panel-span-2,
    .dashboard-grid > .panel:nth-child(3),
    .dashboard-grid > .panel:nth-child(4),
    .dashboard-grid > .panel:nth-child(5) {
        grid-column: span 12;
    }
}

@media (max-width: 640px) {
    html {
        font-size: 15px;
    }

    .topbar,
    .workspace {
        padding: var(--space-4);
    }

    .stats-grid,
    .form-grid-2,
    .split-actions {
        grid-template-columns: 1fr;
    }

    .hero-actions,
    .section-actions {
        width: 100%;
    }

    .hero-actions > *,
    .section-actions > * {
        width: 100%;
    }

    .user-section {
        width: 100%;
        justify-content: space-between;
    }

    .notification {
        left: var(--space-4);
        right: var(--space-4);
        max-width: none;
    }
}