/* =========================================
   1. REACT layout setting
   ========================================= */
html, body, #root {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

.app-container {
    width: 100%;
    min-height: 100vh; /* screen height */
    display: flex;
    flex-direction: column;
    background-color: #f9f9f9;
}

/* =========================================
   2. original layout
   ========================================= */

/* GLOBAL STYLES */
body {
    font-family: 'Nunito', sans-serif;
    background-color: #f9f9f9;
    overflow-x: hidden;
    overflow-y: auto;
}

/* dynamic class name */
.hidden {
    display: none !important;
}

/* TOP MENU */
#top-menu {
    height: 60px;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center; /* Center buttons horizontally */
    gap: 0;
    padding: 0 24px 0 76px;
    box-sizing: border-box;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1000;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
}

.menu-btn {
    background: none;
    border: none;
    font-family: 'Nunito', sans-serif;
    font-size: 16px;
    color: #333;
    padding: 10px 20px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.menu-btn:hover {
    background-color: #f0f0f0;
    border-radius: 4px;
}

/* active for React */
.menu-btn.active {
    font-weight: bold;
    color: #007BFF;
    background-color: #eef7ff;
    border-radius: 4px;
}

.separator {
    width: 1px;
    height: 20px;
    background-color: #555; /* Dark gray separator */
    margin: 0 5px;
}

/* PAGE CONTAINER */
.page {
    /* content under menu */
    min-height: calc(100vh - 60px);
    width: 100%;
    padding-top: 60px; /* Space for fixed menu */
    padding-bottom: 40px; /* Space at bottom for scrolling */
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto; 
}

/* Ensure page titles are black */
.page h1 {
    color: #000 !important;
    background: transparent !important;
}

.page-title {
    color: #000 !important;
    background: transparent !important;
}

/* PAGE A SPECIFIC */
#page-a {
    justify-content: center; /* Center vertically */
    /* Fine-tune this margin if the Home screen sits slightly too low. */
    margin-top: -40px; 
    flex: 1; /* Fill the remaining height so vertical centering still works. */
}

#page-a h1 {
    font-size: 80px;
    margin: 0 0 10px 0;
    color: #000;
    text-align: center; /* Keep the heading centered. */
}

#page-a p {
    color: #666;
    font-size: 20px;
    margin-bottom: 40px;
    text-align: center;
}

.btn-main {
    background-color: #007BFF; /* Blue */
    color: white;
    border: none;
    padding: 15px 50px;
    font-size: 20px;
    font-family: 'Nunito', sans-serif;
    border-radius: 30px; /* Fully rounded corners */
    cursor: pointer;
    transition: transform 0.2s ease;
}

.btn-main:hover {
    transform: scale(1.1); /* Zoom effect */
}

/* PAGE B SPECIFIC */
#page-b {
    justify-content: space-evenly; /* Distribute vertical space */
    padding-bottom: 20px;
    min-height: calc(100vh - 60px); /* Ensure the page still fills the viewport. */
}

/* 1. Display Area */
#display-area {
    width: 60%;
    height: 50vh; /* Use viewport height to scale more consistently across screens. */
    min-height: 300px;
    border: 2px solid #ddd;
    border-radius: 12px;
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #555;
    font-size: 24px;
    position: relative;
    /* Keep video content centered without overflowing the frame. */
    overflow: hidden; 
}

.focus-display-shell {
    background: linear-gradient(180deg, #f7f5f2 0%, #f1f0ec 100%);
}

@keyframes fadeInOverlay {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUpCard {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.focus-flow-overlay {
    position: fixed;
    top: 76px;
    right: 20px;
    bottom: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: rgba(17, 31, 52, 0.18);
    backdrop-filter: blur(10px);
    z-index: 900;
    animation: fadeInOverlay 0.3s ease-out forwards;
}

.focus-flow-card {
    width: min(1040px, 100%);
    background: #fff;
    border-radius: 24px;
    padding: 30px 34px;
    box-shadow: 0 28px 80px rgba(14, 44, 88, 0.18);
    border: 1px solid rgba(0, 123, 255, 0.12);
    box-sizing: border-box;
    animation: slideUpCard 0.4s ease-out forwards;
}

.focus-flow-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 18px;
}

.focus-flow-eyebrow {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 999px;
    background: #e7f3ff;
    color: #007BFF;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.focus-flow-header h2 {
    margin: 14px 0 0;
    color: #333;
    font-size: clamp(1.8rem, 2.5vw, 2.5rem);
    line-height: 1.1;
}

.focus-flow-icon {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 116px;
    height: 116px;
    border-radius: 24px;
    background: linear-gradient(180deg, #f4f9ff 0%, #edf5ff 100%);
    border: 1px solid rgba(0, 123, 255, 0.12);
}

.focus-flow-lead {
    margin: 0 0 20px;
    color: #4a4a4a;
    font-size: 1rem;
    line-height: 1.6;
}

.focus-flow-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.focus-flow-panel {
    background: #f8fbff;
    border: 1px solid #d9eaff;
    border-radius: 14px;
    padding: 18px;
}

.focus-flow-panel h3,
.focus-flow-step-copy h3 {
    margin: 0 0 8px;
    color: #333;
    font-size: 1rem;
}

.focus-flow-panel p,
.focus-flow-step-copy p {
    margin: 0;
    color: #5e6670;
    font-size: 0.95rem;
    line-height: 1.6;
}

.focus-flow-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.focus-flow-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: #f8fbff;
    border: 1px solid #d9eaff;
    border-radius: 14px;
    padding: 16px 18px;
    min-height: 100px;
    box-sizing: border-box;
}

.focus-flow-step-number {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #007BFF;
    color: #fff;
    font-size: 0.95rem;
    font-weight: 800;
}

.focus-flow-step-copy {
    min-width: 0;
}

.focus-flow-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 20px;
}

.focus-flow-note {
    color: #667281;
    font-size: 0.94rem;
    line-height: 1.6;
}

.focus-flow-button,
.focus-flow-secondary {
    border: none;
    border-radius: 999px;
    padding: 13px 24px;
    font-family: 'Nunito', sans-serif;
    font-size: 0.98rem;
    font-weight: 800;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.focus-flow-button {
    background: #007BFF;
    color: #fff;
    box-shadow: 0 12px 24px rgba(0, 123, 255, 0.18);
}

.focus-flow-button:hover {
    background: #0069d9;
    border-color: transparent;
    transform: translateY(-1px);
}

.focus-flow-secondary {
    background: #eef3f8;
    color: #4b5a6b;
}

.focus-flow-secondary:hover {
    background: #e2eaf3;
    border-color: transparent;
}

.focus-state-pill {
    position: absolute;
    top: 18px;
    left: 18px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: 999px;
    color: #fff;
    font-size: 0.88rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    z-index: 2;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.18);
}

.focus-state-pill.pending {
    background: rgba(87, 96, 111, 0.92);
}

.focus-state-pill.focused {
    background: rgba(33, 163, 102, 0.94);
}

.focus-state-pill.not-focused {
    background: rgba(215, 68, 68, 0.94);
}

.focus-state-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.16);
}

.focus-idle-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.12), rgba(0, 0, 0, 0.72));
    color: #fff;
    text-align: center;
    z-index: 1;
}

.focus-idle-overlay p {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 800;
}

.focus-idle-overlay span {
    max-width: 420px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.98rem;
    line-height: 1.5;
}

.focus-inline-error {
    margin-top: 18px;
    padding: 12px 16px;
    max-width: 620px;
    border-radius: 12px;
    background: #fff1ee;
    color: #b54028;
    font-size: 0.95rem;
    font-weight: 700;
    box-shadow: 0 10px 20px rgba(181, 64, 40, 0.08);
}

.focus-inline-error-standalone {
    width: 60%;
    box-sizing: border-box;
}

.focus-debug-panel {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 10px;
    border-radius: 5px;
    font-size: 12px;
    font-family: monospace;
}

.focus-model-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    background: #1a1a2e;
    border-radius: 8px;
    margin: 8px auto;
    max-width: 600px;
}

.focus-model-label {
    color: #aaa;
    font-size: 13px;
    margin-right: 4px;
}

.focus-model-button {
    padding: 5px 14px;
    border-radius: 16px;
    border: 1px solid #555;
    background: transparent;
    color: #ccc;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.focus-model-button.active {
    border: 2px solid #007BFF;
    background: #007BFF;
    color: #fff;
}

#display-area video {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Behaves similarly to background-size: cover. */
}

/* 2. Timeline Area */
#timeline-area {
    width: 60%;
    height: 80px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.timeline-label {
    position: absolute;
    top: 0;
    left: 0;
    color: #888;
    font-size: 14px;
}

#timeline-line {
    width: 100%;
    height: 2px;
    background-color: #87CEEB; /* Light blue */
}

/* 3. Control Panel */
#control-panel {
    display: flex;
    gap: 20px;
    width: 60%;
    justify-content: space-between;
}

.action-btn {
    flex: 1; /* Evenly distributed width */
    padding: 12px 0;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    cursor: pointer;
    color: white;
    transition: opacity 0.2s;
}

.action-btn:hover {
    opacity: 0.9;
}

.action-btn.green { background-color: #28a745; }
.action-btn.yellow { background-color: #ffce0b; }
.action-btn.blue { background-color: #326ed6; }
.action-btn.red { background-color: #dc3545; }

/* 4. Frame Control */
#frame-control {
    display: flex;
    align-items: center;
    gap: 15px;
    color: #333;
    font-weight: bold;
}

#frame-slider {
    width: 200px;
    cursor: pointer;
}

#frame-input {
    width: 50px;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
    text-align: center;
    font-family: 'Nunito', sans-serif;
}

/* ================ ACHIEVEMENT PAGE ================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    width: 80%;
    margin: 40px auto;
}

.stat-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    color: #007BFF;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    color: #666;
}

.achievements-section {
    width: 80%;
    margin: 0 auto;
}

.achievements-section h2 {
    color: #333;
    margin-bottom: 20px;
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.badge {
    background: white;
    padding: 30px 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.badge:hover {
    transform: translateY(-5px);
}

.badge.locked {
    opacity: 0.4;
    filter: grayscale(100%);
}

.badge-icon {
    font-size: 64px;
    margin-bottom: 15px;
}

.badge-name {
    font-size: 16px;
    font-weight: bold;
    color: #333;
}

/* ================ RECORDS PAGE ================ */

.records-controls {
    display: flex;
    gap: 10px;
    margin: 20px auto;
    width: 80%;
    justify-content: center;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid #007BFF;
    background: white;
    color: #007BFF;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Nunito', sans-serif;
    font-weight: 600;
    transition: all 0.2s;
}

.filter-btn:hover {
    background: #e7f3ff;
}

.filter-btn.active {
    background: #007BFF;
    color: white;
}

.chart-container {
    width: 80%;
    background: white;
    padding: 30px;
    border-radius: 12px;
    margin: 20px auto;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

#focus-chart {
    display: block;
    margin: 0 auto;
    /* Make sure the chart scales within its container. */
    max-width: 100%;
}

.sessions-list {
    width: 80%;
    margin: 20px auto;
}

.sessions-list h2 {
    color: #333;
    margin-bottom: 15px;
}

#sessions-table {
    width: 100%;
    background: white;
    border-collapse: collapse;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

#sessions-table th {
    background: #007BFF;
    color: white;
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

#sessions-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #eee;
}

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

#sessions-table tbody tr:hover {
    background: #f8f9fa;
}

.btn-view {
    padding: 6px 18px;
    background: #007BFF;
    color: white;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    font-family: 'Nunito', sans-serif;
    font-size: 12px;
    font-weight: 700;
    transition: background 0.2s;
}

.btn-view:hover {
    background: #0056b3;
}

.records-detail-modal {
    width: min(960px, 92vw);
    max-width: 960px;
    max-height: 86vh;
    overflow-y: auto;
    padding: 30px;
    box-sizing: border-box;
}

.records-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 24px;
}

.records-detail-kicker {
    color: #007BFF;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.records-detail-header h2 {
    margin: 10px 0 8px;
    color: #333;
    text-align: left;
}

.records-detail-subtitle {
    margin: 0;
    color: #667281;
    line-height: 1.6;
}

.records-detail-close {
    border: 1px solid #d6e6fa;
    background: #f4f9ff;
    color: #3569a8;
    border-radius: 999px;
    padding: 10px 18px;
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    cursor: pointer;
}

.records-detail-close:hover {
    border-color: #bfd9f7;
    background: #e9f4ff;
}

.records-detail-feedback {
    padding: 18px 20px;
    border-radius: 14px;
    background: #f7f9fc;
    color: #516173;
    font-weight: 700;
}

.records-detail-feedback-error {
    background: #fff1ee;
    color: #b54028;
}

.records-detail-summary {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.records-detail-stat {
    padding: 18px;
    border-radius: 14px;
    background: #f8fbff;
    border: 1px solid #d9eaff;
}

.records-detail-stat.excellent {
    background: #eef9f0;
    border-color: #cdebd3;
}

.records-detail-stat.good {
    background: #fff9eb;
    border-color: #f8e3a8;
}

.records-detail-stat.fair {
    background: #fff4eb;
    border-color: #ffd6af;
}

.records-detail-stat.low {
    background: #fff0f0;
    border-color: #f3c7c7;
}

.records-detail-stat-label {
    display: block;
    margin-bottom: 8px;
    color: #667281;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.records-detail-stat-value {
    display: block;
    color: #1f2d3d;
    font-size: 28px;
    line-height: 1.1;
}

.records-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.records-detail-card {
    background: white;
    border: 1px solid #e8eef5;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 8px 24px rgba(20, 44, 74, 0.06);
    margin-bottom: 16px;
}

.records-detail-card:last-child {
    margin-bottom: 0;
}

.records-detail-card h3 {
    margin: 0 0 16px;
    color: #333;
    font-size: 18px;
}

.records-detail-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 18px;
}

.records-detail-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.records-detail-item-label {
    color: #7a8795;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.records-detail-item-value {
    color: #263445;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.5;
}

.records-detail-section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.records-detail-section-head span {
    color: #7a8795;
    font-size: 13px;
    font-weight: 700;
}

.records-detail-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10px, 1fr));
    gap: 5px;
}

.records-detail-segment {
    height: 48px;
    border-radius: 999px;
}

.records-detail-segment.focused {
    background: linear-gradient(180deg, #3ab86a 0%, #23a057 100%);
}

.records-detail-segment.mixed {
    background: linear-gradient(180deg, #f1b447 0%, #df9a1e 100%);
}

.records-detail-segment.distracted {
    background: linear-gradient(180deg, #ec7d7d 0%, #d9534f 100%);
}

.records-detail-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 14px;
    color: #667281;
    font-size: 13px;
    font-weight: 700;
}

.records-detail-legend span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.records-detail-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.records-detail-dot.focused {
    background: #23a057;
}

.records-detail-dot.mixed {
    background: #df9a1e;
}

.records-detail-dot.distracted {
    background: #d9534f;
}

.records-detail-events {
    display: grid;
    gap: 10px;
    max-height: 280px;
    overflow-y: auto;
}

.records-detail-event {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: #f8fbff;
    border: 1px solid #e1edf9;
    border-radius: 14px;
}

.records-detail-event-time {
    min-width: 52px;
    color: #3569a8;
    font-size: 13px;
    font-weight: 800;
}

.records-detail-event-copy {
    min-width: 0;
}

.records-detail-event-status {
    color: #243345;
    font-size: 14px;
    font-weight: 800;
}

.records-detail-event-meta {
    margin-top: 4px;
    color: #6f7d8c;
    font-size: 12px;
    line-height: 1.5;
}

.records-detail-event-badge {
    padding: 7px 12px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.records-detail-event-badge.focused {
    background: #eaf8ef;
    color: #1f8a4c;
}

.records-detail-event-badge.distracted {
    background: #fff1f1;
    color: #c24c49;
}

.records-detail-empty {
    padding: 16px 18px;
    border-radius: 14px;
    background: #f7f9fc;
    color: #708090;
    font-weight: 700;
}

/* ================ SETTINGS PAGE ================ */

.settings-container {
    width: 60%;
    max-width: 800px;
    margin: 20px auto;
}

.setting-group {
    background: white;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.setting-group h2 {
    margin-top: 0;
    color: #333;
    font-size: 20px;
    margin-bottom: 20px;
    border-bottom: 2px solid #007BFF;
    padding-bottom: 10px;
}

.setting-item {
    margin-bottom: 25px;
}

.setting-item:last-child {
    margin-bottom: 0;
}

.setting-item label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.slider-group input[type="range"] {
    flex: 1;
}

.slider-group span {
    min-width: 40px;
    text-align: center;
    font-weight: bold;
    color: #007BFF;
    font-size: 18px;
}

.setting-description {
    font-size: 14px;
    color: #666;
    margin-top: 5px;
    font-style: italic;
}

input[type="checkbox"] {
    margin-right: 10px;
    cursor: pointer;
}

input[type="number"] {
    width: 100px;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: 'Nunito', sans-serif;
}

/* Center the settings buttons and give them more width. */
.setting-group .action-btn {
    display: inline-block;   /* Allow buttons to sit side by side. */
    width: 48%;              /* Roughly half-width each, with a small gutter. */
    margin: 15px 1%;         /* Vertical spacing plus horizontal separation. */
    text-align: center;      /* Center the label text. */
    box-sizing: border-box;  /* Prevent borders from forcing an early wrap. */
}

#save-settings {
    display: block;
    margin: 20px auto;
}

/* ================ HELP PAGE ================ */

.help-container {
    width: 70%;
    max-width: 900px;
    margin: 20px auto;
}

/* Fake ad block (Help page) */
.fake-ad {
    position: relative;
    display: block;
    width: min(600px, 90%);
    margin: 10px auto 30px auto;
    border: 1px solid #e5e5e5;
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.fake-ad:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.16);
}

.fake-ad img {
    display: block;
    width: 100%;
    height: auto;
}

.fake-ad-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 6px;
    letter-spacing: 0.5px;
}

.fake-ad-cta {
    position: absolute;
    right: 12px;
    bottom: 12px;
    background: #111;
    color: #fff;
    font-size: 14px;
    padding: 8px 12px;
    border-radius: 8px;
}

.help-section {
    background: white;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.help-section h2 {
    color: #007BFF;
    margin-top: 0;
    margin-bottom: 15px;
}

.help-section ol,
.help-section ul {
    line-height: 1.8;
    color: #333;
}

.help-section p {
    line-height: 1.6;
    color: #333;
}

details {
    margin: 15px 0;
    cursor: pointer;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 5px;
}

summary {
    font-weight: bold;
    padding: 5px;
    color: #007BFF;
}

details[open] summary {
    margin-bottom: 10px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 10px;
}

details p {
    margin: 10px 0 0 0;
}

/* ================ SESSION SUMMARY MODAL ================ */
/* These modal styles can be reused for future overlays. */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    max-width: 500px;
    width: 90%;
}

.modal-content h2 {
    margin-top: 0;
    color: #333;
    text-align: center;
    margin-bottom: 30px;
}

.summary-stats {
    margin-bottom: 30px;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.summary-item:last-child {
    border-bottom: none;
}

.summary-label {
    font-weight: 600;
    color: #666;
}

.summary-value {
    font-weight: bold;
    color: #007BFF;
    font-size: 18px;
}

.modal-content .btn-main {
    display: block;
    margin: 0 auto;
    padding: 12px 40px;
}

/* ================ TIMELINE BLOCKS ================ */

.timeline-block {
    transition: opacity 0.2s;
    border-radius: 2px;
}

.timeline-block:hover {
    opacity: 0.7;
}

/* ================ RESPONSIVE DESIGN ================ */

@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .badges-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .stats-grid,
    .badges-grid {
        grid-template-columns: 1fr;
        width: 90%;
    }

    .settings-container,
    .help-container,
    .chart-container,
    .sessions-list,
    .records-controls {
        width: 90%;
    }

    #control-panel {
        width: 90%;
        flex-wrap: wrap;
    }

    #display-area {
        width: 90%;
    }

    #timeline-area {
        width: 90%;
    }

    #frame-control {
        width: 90%;
        flex-direction: column;
    }

    .focus-inline-error-standalone {
        width: 90%;
    }

    .focus-flow-overlay {
        top: 70px;
        right: 10px;
        bottom: 10px;
        left: 10px;
    }

    .focus-flow-card {
        padding: 22px 20px;
    }

    .focus-flow-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .focus-flow-icon {
        width: 92px;
        height: 92px;
    }

    .focus-flow-grid {
        grid-template-columns: 1fr;
    }

    .focus-flow-steps {
        grid-template-columns: 1fr;
    }

    .focus-flow-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .focus-flow-button,
    .focus-flow-secondary {
        width: 100%;
    }

    .records-detail-modal {
        width: 94vw;
        padding: 22px 18px;
    }

    .records-detail-header,
    .records-detail-section-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .records-detail-summary,
    .records-detail-grid,
    .records-detail-list {
        grid-template-columns: 1fr;
    }

    .records-detail-event {
        grid-template-columns: 1fr;
        align-items: flex-start;
    }
}
/* =========================================
   SESSION RESULT OVERLAY
   ========================================= */

.session-result-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85); /* Dark semi-transparent backdrop. */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    z-index: 10;
    animation: fadeIn 0.5s ease;
    backdrop-filter: blur(5px); /* Optional background blur. */
}

.session-result-overlay h3 {
    font-size: 32px;
    margin-bottom: 30px;
    color: #4cd137; /* Green title accent. */
    text-transform: uppercase;
    letter-spacing: 2px;
}

.session-result-overlay .result-item {
    display: flex;
    justify-content: space-between;
    width: 200px; /* Keep the stat row compact. */
    margin-bottom: 15px;
    font-size: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding-bottom: 5px;
}

.session-result-overlay .label {
    color: #ccc;
    font-weight: normal;
}

.session-result-overlay .value {
    color: #fff;
    font-weight: bold;
    font-family: 'Courier New', monospace; /* Give the values a data-like look. */
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

/* ================= Welcome modal styles ================= */
.welcome-modal-overlay {
position: fixed;
top: 0; left: 0; right: 0; bottom: 0;
background-color: rgba(0, 0, 0, 0.7);
display: flex;
justify-content: center;
align-items: center;
z-index: 9999;
}

.welcome-modal {
background-color: #1e1e24;
padding: 40px;
border-radius: 15px;
text-align: center;
box-shadow: 0 10px 30px rgba(0,0,0,0.5);
border: 1px solid #333;
}

.welcome-modal h2 { margin-top: 0; color: #fff; }
.welcome-modal p { margin-bottom: 30px; color: #ccc; }
.welcome-buttons { display: flex; gap: 20px; justify-content: center; }

/* ================= Top-left avatar styles ================= */
.avatar-container {
    position: absolute;
    left: 20px;
    cursor: pointer;
    z-index: 1;
}

.avatar-circle {
width: 40px;
height: 40px;
border-radius: 50%;
display: flex;
justify-content: center;
align-items: center;
font-weight: bold;
font-size: 1.2rem;
color: white;
transition: all 0.3s ease;
border: 2px solid transparent;
}

avatar-squ.user { background-color: #ffaa00; border-color: #fff; box-shadow: 0 0 10px rgba(255, 170, 0, 0.5); }

/* ================= Home page 2x2 responsive button grid ================= */
.home-button-grid {
  display: grid;
  grid-template-columns: 1fr 1fr; /* Force a clean two-column split. */
  gap: 20px; /* Spacing between buttons. */
  width: 100%;
  max-width: 500px; /* Cap the width so the grid does not feel oversized. */
  margin: 40px auto 0 auto; /* Add top spacing and keep the grid centered. */
}

.home-button-grid .btn-main {
  width: 100%;
  height: 60px; /* Keep all tiles at the same height. */
  margin: 0; /* Remove default outer spacing. */
  padding: 10px;
  font-size: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-sizing: border-box; /* Prevent padding and borders from breaking the grid. */
}

/* Mobile-only scaling for screens below 600px. */
@media (max-width: 600px) {
  #top-menu {
    justify-content: flex-start;
    padding: 0 12px 0 68px;
  }

  .menu-btn {
    padding: 10px 14px;
    font-size: 0.92rem;
  }

  .separator {
    margin: 0 2px;
  }

  .home-button-grid {
    gap: 15px; 
    max-width: 90%; 
  }
  
  .home-button-grid .btn-main {
    height: 50px;
    font-size: 0.85rem; 
  }
}