/* =======================================================================
   InclinoView — Material Design 3 Theme
   ======================================================================= */

:root {
    /* MD3 Color Tokens — Indigo/Teal professional palette */
    --md-primary: #3949AB;
    --md-primary-light: #5C6BC0;
    --md-primary-dark: #283593;
    --md-primary-container: #E8EAF6;
    --md-on-primary: #FFFFFF;
    --md-on-primary-container: #1A237E;

    --md-secondary: #00897B;
    --md-secondary-container: #E0F2F1;
    --md-on-secondary: #FFFFFF;
    --md-on-secondary-container: #004D40;

    --md-tertiary: #F4511E;
    --md-tertiary-container: #FBE9E7;

    --md-surface: #FAFAFA;
    --md-surface-dim: #F5F5F5;
    --md-surface-container: #FFFFFF;
    --md-surface-container-high: #FFFFFF;
    --md-on-surface: #1C1B1F;
    --md-on-surface-variant: #49454F;
    --md-outline: #CAC4D0;
    --md-outline-variant: #E7E0EC;

    --md-error: #D32F2F;
    --md-error-container: #FFEBEE;
    --md-on-error: #FFFFFF;

    --md-success: #2E7D32;
    --md-success-container: #E8F5E9;

    /* Elevation */
    --md-elevation-1: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --md-elevation-2: 0 2px 6px rgba(0,0,0,.08), 0 1px 4px rgba(0,0,0,.06);
    --md-elevation-3: 0 4px 12px rgba(0,0,0,.1), 0 2px 6px rgba(0,0,0,.06);

    /* Shape */
    --md-radius-sm: 8px;
    --md-radius-md: 12px;
    --md-radius-lg: 16px;
    --md-radius-xl: 28px;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Typography */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

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

html {
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    color: var(--md-on-surface);
    background: var(--md-surface);
    -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

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

/* =======================================================================
   Top App Bar
   ======================================================================= */
.top-app-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 var(--space-md);
    background: var(--md-primary);
    color: var(--md-on-primary);
    box-shadow: var(--md-elevation-2);
}

.top-app-bar__leading {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.top-app-bar__title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 600;
    color: inherit;
    text-decoration: none;
    letter-spacing: 0.02em;
}

.top-app-bar__trailing {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.user-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--md-radius-xl);
    background: rgba(255,255,255,.15);
    font-size: 0.875rem;
    font-weight: 500;
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: inherit;
    cursor: pointer;
    transition: background .15s;
}
.icon-btn:hover { background: rgba(255,255,255,.12); }

.icon-btn--sm {
    width: 32px;
    height: 32px;
}
.icon-btn--sm .material-symbols-outlined { font-size: 20px; }
.icon-btn--danger:hover { color: var(--md-error); background: var(--md-error-container); }

/* =======================================================================
   Main Content
   ======================================================================= */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* =======================================================================
   Flash Messages
   ======================================================================= */
.flash-container {
    position: fixed;
    top: 72px;
    right: 16px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 420px;
}

.flash {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 12px 16px;
    border-radius: var(--md-radius-md);
    box-shadow: var(--md-elevation-3);
    animation: slideIn .3s ease;
    font-size: 0.875rem;
}

.flash--error { background: var(--md-error-container); color: var(--md-error); }
.flash--success { background: var(--md-success-container); color: var(--md-success); }
.flash--info { background: var(--md-primary-container); color: var(--md-on-primary-container); }

.flash__close {
    margin-left: auto;
    border: none;
    background: none;
    color: inherit;
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    display: flex;
}
.flash__close:hover { background: rgba(0,0,0,.08); }

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

/* =======================================================================
   Snackbar
   ======================================================================= */
.snackbar {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: #323232;
    color: #fff;
    border-radius: var(--md-radius-sm);
    box-shadow: var(--md-elevation-3);
    font-size: 0.875rem;
    z-index: 300;
    animation: snackIn .3s ease;
}

@keyframes snackIn {
    from { transform: translateX(-50%) translateY(100%); opacity: 0; }
    to { transform: translateX(-50%) translateY(0); opacity: 1; }
}

/* =======================================================================
   Cards & Surfaces
   ======================================================================= */
.surface-card {
    background: var(--md-surface-container);
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-1);
    padding: var(--space-lg);
}

/* =======================================================================
   Page Header
   ======================================================================= */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--md-on-surface);
    letter-spacing: -0.01em;
}

.page-subtitle {
    color: var(--md-on-surface-variant);
    margin-top: 4px;
    font-size: 0.9rem;
}

.page-actions {
    display: flex;
    gap: var(--space-sm);
    flex-shrink: 0;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.85rem;
    color: var(--md-on-surface-variant);
    margin-bottom: 4px;
}
.breadcrumb a { color: var(--md-primary); }
.breadcrumb .material-symbols-outlined { font-size: 18px; }

/* =======================================================================
   Buttons
   ======================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--md-radius-xl);
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .15s;
    white-space: nowrap;
    text-decoration: none;
}
.btn .material-symbols-outlined { font-size: 20px; }

.btn-primary {
    background: var(--md-primary);
    color: var(--md-on-primary);
}
.btn-primary:hover { background: var(--md-primary-light); box-shadow: var(--md-elevation-2); }

.btn-tonal {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}
.btn-tonal:hover { background: #D1D5F0; }

.btn-text {
    background: transparent;
    color: var(--md-primary);
    padding: 10px 16px;
}
.btn-text:hover { background: var(--md-primary-container); }

.btn-danger {
    background: var(--md-error);
    color: var(--md-on-error);
}
.btn-danger:hover { opacity: .9; }

.btn-full { width: 100%; justify-content: center; }

/* =======================================================================
   Forms
   ======================================================================= */
.form-field {
    margin-bottom: var(--space-md);
}

.form-field label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--md-on-surface-variant);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-field input[type="text"],
.form-field input[type="password"],
.form-field input[type="number"],
.form-field input[type="email"],
.form-field textarea,
.form-field select {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--md-outline);
    border-radius: var(--md-radius-sm);
    font-family: var(--font);
    font-size: 0.9rem;
    background: var(--md-surface);
    color: var(--md-on-surface);
    transition: border-color .15s, box-shadow .15s;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
    outline: none;
    border-color: var(--md-primary);
    box-shadow: 0 0 0 3px rgba(57,73,171,.12);
}

.form-field textarea { resize: vertical; }

.select-full {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--md-outline);
    border-radius: var(--md-radius-sm);
    font-family: var(--font);
    font-size: 0.875rem;
    background: var(--md-surface);
    cursor: pointer;
}
.select-full:focus {
    outline: none;
    border-color: var(--md-primary);
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 1.5px solid var(--md-outline);
    border-radius: var(--md-radius-sm);
    background: var(--md-surface);
    transition: border-color .15s, box-shadow .15s;
}

.input-wrapper:focus-within {
    border-color: var(--md-primary);
    box-shadow: 0 0 0 3px rgba(57,73,171,.12);
}

.input-wrapper .material-symbols-outlined {
    color: var(--md-on-surface-variant);
    font-size: 22px;
}

.input-wrapper input {
    flex: 1;
    border: none;
    background: transparent;
    font-family: var(--font);
    font-size: 0.9rem;
    color: var(--md-on-surface);
    outline: none;
}

/* =======================================================================
   Login Page
   ======================================================================= */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 64px);
    background: linear-gradient(135deg, var(--md-primary-dark) 0%, var(--md-primary) 50%, var(--md-secondary) 100%);
    margin: -24px;
    padding: var(--space-lg);
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: var(--space-2xl) var(--space-xl);
}

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

.login-icon {
    font-size: 56px;
    color: var(--md-primary);
    margin-bottom: var(--space-sm);
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--md-on-surface);
}

.login-subtitle {
    color: var(--md-on-surface-variant);
    font-size: 0.9rem;
    margin-top: 4px;
}

/* =======================================================================
   Dashboard — Project Grid
   ======================================================================= */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.project-card {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: box-shadow .2s, transform .2s;
}
.project-card:hover {
    box-shadow: var(--md-elevation-3);
    transform: translateY(-2px);
    text-decoration: none;
}

.project-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
}

.project-card__icon {
    font-size: 32px;
    color: var(--md-primary);
}

.project-card__title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.project-card__desc {
    color: var(--md-on-surface-variant);
    font-size: 0.85rem;
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-card__meta {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--md-on-surface-variant);
    font-size: 0.8rem;
}
.project-card__meta .material-symbols-outlined { font-size: 18px; }

.role-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: var(--md-radius-xl);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.role-badge--owner { background: var(--md-primary-container); color: var(--md-on-primary-container); }
.role-badge--editor { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.role-badge--viewer { background: var(--md-surface-dim); color: var(--md-on-surface-variant); }

/* =======================================================================
   Empty State
   ======================================================================= */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    text-align: center;
    color: var(--md-on-surface-variant);
}

.empty-state__icon {
    font-size: 64px;
    margin-bottom: var(--space-md);
    opacity: .4;
}

.empty-state h2 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--md-on-surface);
}

.empty-state p { margin-bottom: var(--space-md); }

.empty-state--sm {
    padding: var(--space-lg);
}
.empty-state--sm .material-symbols-outlined { font-size: 40px; }

/* =======================================================================
   Dialog
   ======================================================================= */
.dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.4);
    z-index: 150;
    display: none;
}
.dialog-overlay.open { display: block; }

.dialog {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: var(--space-lg);
}
.dialog.open { display: flex; }

.dialog__card {
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    animation: dialogIn .2s ease;
}

.dialog__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.dialog__header .icon-btn {
    color: var(--md-on-surface-variant);
}
.dialog__header .icon-btn:hover {
    background: var(--md-surface-dim);
}

.dialog__title {
    font-size: 1.25rem;
    font-weight: 700;
}

.dialog__header + form .dialog__title,
h2.dialog__title {
    margin-bottom: var(--space-lg);
}

.dialog__actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

@keyframes dialogIn {
    from { transform: scale(.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* =======================================================================
   Project View — Layout
   ======================================================================= */
.project-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: var(--space-lg);
    align-items: start;
}

@media (max-width: 900px) {
    .project-layout { grid-template-columns: 1fr; }
}

/* Tree Panel */
.tree-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.tree-panel__header h2 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
}

/* Tree */
.tree-folder__header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px;
    border-radius: var(--md-radius-sm);
    cursor: pointer;
    user-select: none;
    transition: background .15s;
}
.tree-folder__header:hover { background: var(--md-surface-dim); }

.tree-folder__arrow {
    font-size: 20px;
    transition: transform .2s;
    color: var(--md-on-surface-variant);
}
.tree-folder--collapsed .tree-folder__arrow { transform: rotate(-90deg); }
.tree-folder--collapsed .tree-folder__content { display: none; }

.tree-folder__icon { color: var(--md-primary); font-size: 22px; }
.tree-folder__name { font-weight: 500; flex: 1; }
.tree-folder__count {
    font-size: 0.75rem;
    color: var(--md-on-surface-variant);
    background: var(--md-surface-dim);
    padding: 1px 8px;
    border-radius: var(--md-radius-xl);
}

.tree-folder__actions {
    display: none;
    gap: 2px;
}
.tree-folder__header:hover .tree-folder__actions { display: flex; }

.tree-folder__content {
    margin-left: 8px;
    border-left: 1.5px solid var(--md-outline-variant);
    min-height: 8px;
}

.tree-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: var(--md-radius-sm);
    transition: background .15s;
}
.tree-item--inc[data-href] { cursor: pointer; }
.tree-item:hover { background: var(--md-surface-dim); }
.tree-item--dragging { opacity: .4; background: var(--md-primary-container); }

.tree-item__drag-handle {
    color: var(--md-on-surface-variant);
    font-size: 18px;
    cursor: grab;
    opacity: 0;
    transition: opacity .15s;
    user-select: none;
}
.tree-item:hover .tree-item__drag-handle { opacity: .6; }
.tree-item__drag-handle:hover { opacity: 1 !important; }

.tree-item__icon { color: var(--md-secondary); font-size: 20px; }

.tree-item__label {
    flex: 1;
    color: var(--md-on-surface);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
}
.tree-item:hover .tree-item__label { color: var(--md-primary); }

.tree-item__move {
    font-size: 0.7rem;
    padding: 1px 4px;
    border: 1px solid var(--md-outline);
    border-radius: var(--md-radius-sm);
    background: var(--md-surface-container);
    color: var(--md-on-surface-variant);
    cursor: pointer;
    opacity: 0;
    transition: opacity .15s;
}
.tree-item:hover .tree-item__move { opacity: 1; }
.tree-item__move:focus { opacity: 1; }

.tree-item__meta {
    font-size: 0.75rem;
    color: var(--md-on-surface-variant);
}

.tree-item__badge {
    font-size: 0.7rem;
    font-weight: 700;
    background: var(--md-primary);
    color: var(--md-on-primary);
    padding: 1px 7px;
    border-radius: var(--md-radius-xl);
}

.tree-dropzone {
    min-height: 8px;
    padding: 4px 0;
    transition: all .2s;
    border-radius: var(--md-radius-sm);
}
.tree-dropzone--over {
    background: var(--md-primary-container);
    min-height: 40px;
    border: 2px dashed var(--md-primary-light);
    padding: 8px;
}
.tree-dropzone--empty-hint {
    min-height: 32px;
    border: 2px dashed var(--md-outline-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-surface-variant);
    font-size: 0.8rem;
}

/* Info Panel */
.info-panel h2 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.info-item {
    padding: var(--space-sm);
    border-radius: var(--md-radius-sm);
    background: var(--md-surface-dim);
}

.info-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--md-on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-weight: 600;
    font-size: 0.9rem;
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--md-on-surface);
}
.section-title .material-symbols-outlined { font-size: 20px; color: var(--md-on-surface-variant); }

.member-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.member-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.member-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
}

.member-info { flex: 1; }
.member-name { font-weight: 500; font-size: 0.875rem; display: block; }
.member-role { font-size: 0.75rem; color: var(--md-on-surface-variant); }

.danger-zone {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--md-outline-variant);
}

/* =======================================================================
   Inclinometer View — Layout
   ======================================================================= */
.inc-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--space-lg);
    align-items: start;
}

@media (max-width: 1000px) {
    .inc-layout { grid-template-columns: 1fr; }
}

.inc-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

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

.panel__title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}
.panel__title .material-symbols-outlined { font-size: 20px; color: var(--md-on-surface-variant); }

/* Measurement List */
.measurement-list {
    max-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.measurement-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 8px;
    border-radius: var(--md-radius-sm);
    transition: background .15s;
    gap: 6px;
}
.measurement-item:hover { background: var(--md-surface-dim); }

.measurement-item--baseline {
    background: var(--md-primary-container);
}

.measurement-check {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    flex: 1;
    min-width: 0;
}

.measurement-check input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--md-primary);
    cursor: pointer;
    flex-shrink: 0;
}

.measurement-ts {
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
}

.measurement-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.baseline-tag {
    font-size: 0.6rem;
    font-weight: 700;
    background: var(--md-primary);
    color: var(--md-on-primary);
    padding: 1px 6px;
    border-radius: var(--md-radius-xl);
    letter-spacing: 0.05em;
}

.measurement-format {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--md-on-surface-variant);
    background: var(--md-surface-dim);
    padding: 1px 6px;
    border-radius: var(--md-radius-xl);
}

/* Angle Control */
.angle-control {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.slider {
    flex: 1;
    -webkit-appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--md-outline);
    outline: none;
}
.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--md-primary);
    cursor: pointer;
    box-shadow: var(--md-elevation-1);
}

.angle-value {
    display: flex;
    align-items: center;
    gap: 2px;
    font-weight: 600;
    font-size: 0.9rem;
}

.angle-number {
    width: 64px;
    padding: 6px 8px;
    border: 1.5px solid var(--md-outline);
    border-radius: var(--md-radius-sm);
    font-family: var(--font);
    font-size: 0.85rem;
    text-align: center;
}
.angle-number:focus {
    outline: none;
    border-color: var(--md-primary);
}

.toggle-group {
    display: flex;
    gap: 0;
    border: 1.5px solid var(--md-outline);
    border-radius: var(--md-radius-sm);
    overflow: hidden;
}

.toggle-option {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--md-on-surface);
    background: transparent;
    transition: background .15s, color .15s;
    text-align: center;
}

.toggle-option + .toggle-option {
    border-left: 1.5px solid var(--md-outline);
}

.toggle-option input[type="radio"] {
    display: none;
}

.toggle-option:has(input:checked) {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

/* =======================================================================
   Tabs
   ======================================================================= */
.tab-bar {
    display: flex;
    gap: 0;
    margin-bottom: var(--space-md);
    border-bottom: 2px solid var(--md-outline-variant);
}

.tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 20px;
    border: none;
    background: transparent;
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--md-on-surface-variant);
    cursor: pointer;
    position: relative;
    transition: color .15s;
}

.tab:hover { color: var(--md-on-surface); }

.tab--active {
    color: var(--md-primary);
}
.tab--active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--md-primary);
    border-radius: 3px 3px 0 0;
}

.tab .material-symbols-outlined { font-size: 20px; }

.tab-content { display: none; }
.tab-content--active { display: block; }

/* Charts */
.inc-charts { min-width: 0; }

.chart-container { padding: var(--space-lg); }

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.chart-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.chart-hint {
    font-size: 0.8rem;
    color: var(--md-on-surface-variant);
    margin-top: 4px;
}

.fullscreen-btn {
    color: var(--md-on-surface-variant);
}
.fullscreen-btn:hover {
    color: var(--md-primary);
}

/* Fullscreen chart overlay */
.chart-container--fullscreen {
    position: fixed;
    inset: 0;
    z-index: 300;
    background: var(--md-surface-container);
    padding: var(--space-lg);
    overflow-y: auto;
    border-radius: 0;
    box-shadow: none;
    max-width: none;
}
.chart-container--fullscreen .chart-box,
.chart-container--fullscreen .chart-box--tall {
    min-height: 0;
    height: calc(100vh - 80px);
}

.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

@media (max-width: 800px) {
    .chart-row { grid-template-columns: 1fr; }
}

.chart-box {
    width: 100%;
    min-height: 450px;
}

.chart-box--tall {
    min-height: 550px;
}

/* =======================================================================
   Upload Zone
   ======================================================================= */
.upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    border: 2px dashed var(--md-outline);
    border-radius: var(--md-radius-md);
    cursor: pointer;
    transition: all .2s;
    text-align: center;
}

.upload-zone:hover,
.upload-zone--active {
    border-color: var(--md-primary);
    background: var(--md-primary-container);
}

.upload-zone__icon {
    font-size: 48px;
    color: var(--md-primary);
    margin-bottom: var(--space-sm);
}

.upload-zone__text {
    font-weight: 500;
    margin-bottom: 4px;
}

.upload-zone__hint {
    font-size: 0.8rem;
    color: var(--md-on-surface-variant);
}

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

.file-name {
    padding: var(--space-sm) var(--space-md);
    background: var(--md-primary-container);
    border-radius: var(--md-radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--md-on-primary-container);
}

/* =======================================================================
   Data Table
   ======================================================================= */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead th {
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--md-on-surface-variant);
    padding: var(--space-sm) var(--space-md);
    border-bottom: 2px solid var(--md-outline-variant);
}

.data-table tbody td {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--md-outline-variant);
    font-size: 0.875rem;
}

.data-table tbody tr:hover { background: var(--md-surface-dim); }

.table-actions {
    display: flex;
    gap: 4px;
}

/* =======================================================================
   Scrollbar
   ======================================================================= */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--md-outline); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--md-on-surface-variant); }

/* =======================================================================
   Responsive
   ======================================================================= */
@media (max-width: 600px) {
    .main-content { padding: var(--space-md); }
    .page-header { flex-direction: column; }
    .project-grid { grid-template-columns: 1fr; }
    .login-card { padding: var(--space-lg); }
}