:root {
    --primary: #1e88e5;
    --primary-dark: #1565c0;
    --primary-light: #e3f2fd;
    --accent: #00c6ff;
    --accent-gradient: linear-gradient(135deg, #1e88e5 0%, #00c6ff 100%);
    --success: #22c55e;
    --success-bg: #f0fdf4;
    --success-border: #bbf7d0;
    --success-text: #166534;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    --warning-text: #92400e;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --danger-text: #991b1b;
    --text-dark: #0f172a;
    --text-muted: #475569;
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #edf4fc 50%, #e2eefd 100%);

    /* Standardized Border Radii Tokens */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 99px;

    /* Standardized Shadows Tokens */
    --shadow-sm: 0 6px 20px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 12px 35px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 25px 60px rgba(15, 61, 106, 0.12);
}

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

body{
    background: var(--bg-gradient);
    line-height: 1.6;
    color: var(--text-dark);
}

/* Accessible Keyboard Focus Indicators */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.particle-button:focus-visible,
.sample-chip:focus-visible,
.image-tab-btn:focus-visible,
.filter-tab:focus-visible,
.step-tab:focus-visible,
[tabindex]:focus-visible {
    outline: 2.5px solid #1e88e5 !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 4px rgba(30, 136, 229, 0.2) !important;
}

/* Standardized Status Pills */
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    white-space: nowrap;
}

.status-pill.status-active,
.status-pill.status-verified,
.status-pill.status-approved,
.status-pill.status-success {
    background: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

.status-pill.status-pending,
.status-pill.status-warning,
.status-pill.status-setup-pending {
    background: var(--warning-bg);
    color: var(--warning-text);
    border: 1px solid var(--warning-border);
}

.status-pill.status-rejected,
.status-pill.status-danger,
.status-pill.status-inactive {
    background: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid var(--danger-border);
}

.status-pill.status-info,
.status-pill.status-session {
    background: var(--primary-light);
    color: var(--primary-dark);
    border: 1px solid rgba(30, 136, 229, 0.25);
}

/* ============================================================
   Phase 2: Mobile-Responsive Data Tables & Touch Scroll Indicators
   ============================================================ */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
    border-radius: var(--radius-md);
}

.table-responsive:focus-visible {
    outline: 2px solid #1e88e5 !important;
    outline-offset: 2px !important;
}

.mobile-table-scroll-hint {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #eff6ff 0%, #e0f2fe 100%);
    color: var(--primary-dark);
    border-bottom: 1px solid rgba(30, 136, 229, 0.2);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    user-select: none;
    pointer-events: none;
}

@media (max-width: 768px) {
    .mobile-table-scroll-hint {
        display: flex;
    }
}

/* ============================================================
   Phase 3: XAI Micro-Tooltips (Grad-CAM & ROI Explanations)
   ============================================================ */
.xai-tooltip-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.xai-info-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 17px;
    height: 17px;
    border-radius: 50%;
    background: #e3f2fd;
    color: #1e88e5;
    border: 1px solid rgba(30, 136, 229, 0.3);
    font-size: 0.72rem;
    font-weight: 800;
    font-style: italic;
    font-family: serif;
    cursor: help;
    padding: 0;
    line-height: 1;
    transition: all 0.2s ease;
    vertical-align: middle;
}

.xai-info-trigger:hover,
.xai-info-trigger:focus {
    background: #1e88e5;
    color: #ffffff;
    border-color: #1565c0;
    transform: scale(1.1);
}

.xai-tooltip-content {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    width: 260px;
    max-width: calc(100vw - 32px);
    background: #0f172a;
    color: #f8fafc;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 0.78rem;
    font-weight: 500;
    line-height: 1.45;
    text-align: left;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.12);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 10100;
    white-space: normal;
    text-transform: none;
}

.xai-tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: #0f172a transparent transparent transparent;
}

.xai-info-trigger:hover + .xai-tooltip-content,
.xai-info-trigger:focus + .xai-tooltip-content,
.xai-tooltip-wrapper:hover .xai-tooltip-content {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 640px) {
    .xai-tooltip-content {
        width: 220px;
        font-size: 0.75rem;
    }
}

.container{
    background:white;
    max-width: 1100px;
    margin: 40px auto;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.12);
    text-align: center;
}

h1{ color:#1e88e5; margin-bottom:10px; }

button{
    background: #1e88e5;
    color: white;
    border: none;
    padding: 14px 40px;
    border-radius: 50px;
    font-size: 17px;
    cursor: pointer;
    transition: background-color 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.25s ease,
                box-shadow 0.25s ease,
                transform 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                color 0.25s ease;
    font-weight: 600;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform-style: preserve-3d;
    will-change: transform, box-shadow;
}

/* Default hover only for unstyled (class-less) buttons. A higher-specificity global hover
   overrode every component's own :hover (e.g. approve/PDF buttons flashing blue). No lift:
   moving the button away from the cursor caused hover/unhover flicker at the edges. */
button:not([class]):hover:not(:disabled):not([aria-busy="true"]){
    background: #1565c0;
    box-shadow: 0 8px 20px rgba(30, 136, 229, 0.3);
}

.error{ color:red; font-weight:bold; margin-top:20px; }

.images{
    display:flex;
    justify-content:center;
    gap:40px;
    margin-top:25px;
    flex-wrap:wrap;
}

.images img{
    max-width: 100%;
    border-radius:10px;
    box-shadow:0 5px 15px rgba(0,0,0,.2);
}

table{
    width:100%;
    margin-top:25px;
    border-collapse:collapse;
}

table th{
    background: #1e88e5;
    color:white;
    padding:14px;
}

table td{
    padding:12px;
    border:1px solid #ddd;
}

table tr:nth-child(even){
    background:#f5f5f5;
}

/* Smooth Page Transitions */
body {
    transition: opacity 0.4s ease;
}

.page-transition {
    opacity: 0;
    transition: opacity 0.4s ease;
}

.page-transition.active {
    opacity: 1;
}

/* Additional polish */
h2 {
    font-size: 2.5rem;
    color: #1a2a44;
    text-align: center;
    margin-bottom: 3rem;
}

.step p {
    margin: 0;
}

/* ====================== SMOOTH PAGE TRANSITIONS ====================== */
body {
    transition: opacity 0.4s ease-in-out;
    opacity: 1;
}

.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease-in-out;
}

.page-transition.active {
    opacity: 1;
    pointer-events: all;
}

/* Center the second row when the core team has only 2 cards */
.team-grid-centered {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 320px));
    justify-content: center;
}

/* Make navbar consistent across pages */
.navbar {
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* ============================================================
   Global Interactive Control Normalization & Premium Smooth UX
   ============================================================ */
button, a, input, select, textarea, [role="button"], [tabindex="0"] {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
}

button,
.btn,
.btn-primary,
.btn-secondary,
.btn-filter,
.btn-reset,
.btn-export,
.btn-submit,
.submit-btn,
.particle-button,
.image-tab-btn,
.page-btn,
.user-profile-trigger,
.nav-links a {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform-style: preserve-3d;
    will-change: transform, box-shadow;
    transition: background-color 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                color 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Polished Focus Rings (Eliminate Mouse Click Flash) */
button:focus:not(:focus-visible),
a:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea:focus:not(:focus-visible),
[tabindex]:focus:not(:focus-visible) {
    outline: none !important;
    box-shadow: none;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid #1e88e5 !important;
    outline-offset: 2px !important;
}

/* Disabled & Loading Control Protection */
button:disabled,
button.disabled,
button[aria-busy="true"],
a.disabled,
.btn:disabled,
.btn.disabled,
.particle-button:disabled,
.submit-btn:disabled,
.btn-submit:disabled,
.btn-export:disabled {
    opacity: 0.65 !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: none !important;
    pointer-events: none !important;
}

/* Stable Smooth Desktop Hover Defaults */
@media (hover: hover) {
    .btn-primary:hover:not(:disabled):not(.disabled) {
        box-shadow: 0 14px 32px rgba(30, 136, 229, 0.4);
    }

    .btn-secondary:hover:not(:disabled):not(.disabled) {
        box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
    }

    .img-thumb:hover {
        transform: scale(1.08);
        box-shadow: 0 8px 20px rgba(15, 23, 42, 0.18);
    }
}

/* Restrained hovers for buttons that previously relied on the global button hover */
.btn-action-dicom:hover:not(:disabled) {
    background: rgba(14, 165, 233, 0.16) !important;
}

.image-tab-btn:not(.active):hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.6) !important;
}

.lightbox-close:hover {
    color: #0f172a;
}

/* Subtle press feedback (no scale, no bounce) */
button:active:not(:disabled):not([aria-busy="true"]),
.btn:active,
.btn-primary:active,
.btn-secondary:active,
.btn-submit:active:not(:disabled),
.submit-btn:active:not(:disabled),
.particle-button:active:not(:disabled) {
    transform: translateY(1px);
}

/* Touch Device Reset */
@media (hover: none) {
    button:hover, .btn:hover, a:hover, .img-thumb:hover {
        transform: none !important;
    }
}

/* Reduced motion: no hover/press movement and no control transitions */
@media (prefers-reduced-motion: reduce) {
    button,
    .btn,
    .btn-primary,
    .btn-secondary,
    .btn-submit,
    .submit-btn,
    .particle-button,
    .nav-links a {
        transition: none !important;
    }

    button:hover, button:active,
    .btn:hover, .btn:active,
    .btn-primary:hover, .btn-primary:active,
    .btn-secondary:hover, .btn-secondary:active,
    .btn-submit:hover, .btn-submit:active,
    .submit-btn:hover, .submit-btn:active,
    .particle-button:hover, .particle-button:active {
        transform: none !important;
    }
}

/* Phase 9: Mobile Date Range Filter Responsive Layout */
@media (max-width: 480px) {
    .range-group {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    .range-separator {
        display: none;
    }
}

/* P0-6: Universal Accessibility High-Contrast Focus-Visible Ring */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex="0"]:focus-visible,
.js-sortable-col:focus-visible {
    outline: none !important;
    box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.45), 0 0 0 1px #1e88e5 !important;
    border-color: #1e88e5 !important;
}

/* Standardized Circular Lightbox Close Buttons (Neutralize Global Button Padding) */
.lightbox-close-btn,
.history-lightbox-close,
.lightbox-close {
    width: 40px !important;
    height: 40px !important;
    min-width: 40px !important;
    min-height: 40px !important;
    max-width: 40px !important;
    max-height: 40px !important;
    padding: 0 !important;
    margin: 0 !important;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-sizing: border-box !important;
    flex-shrink: 0 !important;
    cursor: pointer;
    outline: none;
}

.lightbox-close-btn svg,
.history-lightbox-close svg,
.lightbox-close svg {
    width: 18px !important;
    height: 18px !important;
    min-width: 18px !important;
    min-height: 18px !important;
    max-width: 18px !important;
    max-height: 18px !important;
    display: block !important;
    stroke: currentColor !important;
    fill: none !important;
    stroke-width: 2.5 !important;
    stroke-linecap: round !important;
    stroke-linejoin: round !important;
    pointer-events: none !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* Export Dropdown Menu */
.export-dropdown-wrapper {
    position: relative;
    display: inline-block;
}

.export-trigger-btn[aria-expanded="true"] .dropdown-caret {
    transform: rotate(180deg);
}

.export-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    z-index: 1000;
    min-width: 280px;
    background: #ffffff;
    border: 1px solid rgba(15, 23, 42, 0.12);
    border-radius: var(--radius-md, 12px);
    box-shadow: var(--shadow-lg, 0 25px 60px rgba(15, 61, 106, 0.12));
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    animation: exportMenuFadeIn 0.15s ease-out;
}

@keyframes exportMenuFadeIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.export-menu-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 10px 12px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm, 8px);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-dark, #0f172a);
    cursor: pointer;
    text-align: left;
    gap: 10px;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.export-menu-item svg {
    flex-shrink: 0;
    color: var(--text-muted, #475569);
    transition: color 0.15s ease;
}

.export-menu-item:hover,
.export-menu-item:focus,
.export-menu-item:focus-visible {
    background: var(--primary-light, #e3f2fd) !important;
    color: var(--primary-dark, #1565c0) !important;
    transform: none !important;
    box-shadow: none !important;
    outline: none !important;
}

.export-menu-item:hover svg,
.export-menu-item:focus svg,
.export-menu-item:focus-visible svg {
    color: var(--primary-dark, #1565c0) !important;
}

.export-menu-divider {
    height: 1px;
    background-color: rgba(15, 23, 42, 0.08);
    margin: 4px 0;
}