/**
 * ImageSecureSend CSS
 * Designed for simplicity and accessibility, especially for older users.
 * Large touch targets, high contrast, clear typography.
 */

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

body {
    /* System font stack for fast rendering without web font downloads */
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #ffffff;
    min-height: 100vh;
    line-height: 1.6;
    /* Prevent double-tap-to-zoom on mobile, keeping single-tap responsive.
       Does NOT disable pinch-to-zoom (that's handled per-element in JS). */
    touch-action: manipulation;
}

.container {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-top: 40px;
    margin-bottom: 10px;
    color: #e94560;
}

.subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #a0a0a0;
    margin-bottom: 15px;
}

/* E2E encryption notice shown between title and buttons on index page */
.e2e-notice {
    text-align: center;
    font-size: 0.95rem;
    color: #888;
    margin-bottom: 30px;
    line-height: 1.5;
}

/* Large button styling for accessibility */
.button-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    flex: 1;
    justify-content: center;
    padding: 20px 0;
}

.btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    border: none;
    min-height: 120px;
}

.btn:active {
    transform: scale(0.98);
}

.btn-large {
    min-height: 150px;
}

.btn-primary {
    background: linear-gradient(135deg, #e94560 0%, #c23a51 100%);
    color: white;
    box-shadow: 0 8px 20px rgba(233, 69, 96, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 12px 30px rgba(233, 69, 96, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #0f3460 0%, #16213e 100%);
    color: white;
    border: 2px solid #e94560;
    box-shadow: 0 8px 20px rgba(15, 52, 96, 0.3);
}

.btn-secondary:hover {
    box-shadow: 0 12px 30px rgba(15, 52, 96, 0.4);
}

.btn-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.btn-text {
    font-size: 1.8rem;
}

.btn-hint {
    font-size: 0.9rem;
    font-weight: normal;
    opacity: 0.8;
    margin-top: 5px;
}

/* Action buttons (smaller, for in-page actions) */
.btn-action {
    padding: 20px 40px;
    font-size: 1.3rem;
    min-height: 80px;
    width: 100%;
    margin: 10px 0;
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #218838 100%);
    color: white;
    box-shadow: 0 6px 15px rgba(40, 167, 69, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, #ffc107 0%, #e0a800 100%);
    color: #000;
    box-shadow: 0 6px 15px rgba(255, 193, 7, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    color: white;
    box-shadow: 0 6px 15px rgba(220, 53, 69, 0.3);
}

.btn-info {
    background: linear-gradient(135deg, #17a2b8 0%, #138496 100%);
    color: white;
    box-shadow: 0 6px 15px rgba(23, 162, 184, 0.3);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    /* Override :active scale transform to prevent visual feedback on disabled buttons */
    transform: none !important;
}

/* QR Code display */
.qr-container {
    background: white;
    padding: 20px;
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px auto;
    max-width: 320px;
}

.qr-container canvas,
.qr-container img {
    max-width: 100%;
    height: auto;
}

/* Camera/Video display */
.camera-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin: 20px auto;
    border-radius: 20px;
    overflow: hidden;
    background: #000;
    /* Hide container when video is not active (no srcObject) */
    display: none;
}

/* Show camera container only when it has an active video */
.camera-container.active {
    display: block;
}

.camera-container video {
    width: 100%;
    height: auto;
    display: block;
    /* Pinch-to-zoom handled by JS */
    touch-action: none;
}

/* Floating capture button overlay - positioned inside the camera container */
.capture-btn-floating {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 20px 50px;
    font-size: 1.3rem;
    min-height: auto;
    background: rgba(220, 53, 69, 0.7) !important;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 50px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    z-index: 10;
}

/* Status messages */
.status {
    text-align: center;
    padding: 15px 20px;
    border-radius: 10px;
    margin: 20px 0;
    font-size: 1.1rem;
}

.status-waiting {
    background: rgba(255, 193, 7, 0.2);
    border: 1px solid #ffc107;
    color: #ffc107;
}

.status-connected {
    background: rgba(40, 167, 69, 0.2);
    border: 1px solid #28a745;
    color: #28a745;
}

.status-error {
    background: rgba(220, 53, 69, 0.2);
    border: 1px solid #dc3545;
    color: #dc3545;
}

.status-info {
    background: rgba(23, 162, 184, 0.2);
    border: 1px solid #17a2b8;
    color: #17a2b8;
}

/* ============ Kebab Menu & Sidebar ============ */
/*
 * Top-right settings (cogwheel) button that opens a slide-in sidebar.
 * The sidebar consolidates language switching, logs, connection info, and about.
 * z-index 1500 matches the old lang-switcher level.
 */

.kebab-btn {
    position: fixed;
    top: 15px;
    right: 15px;
    z-index: 1500;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    line-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.kebab-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Dark overlay behind sidebar */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.sidebar {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    max-width: 80vw;
    background: #1a1a2e;
    border-left: 1px solid rgba(255, 255, 255, 0.15);
    z-index: 2000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar.visible {
    transform: translateX(0);
}

.sidebar-close {
    align-self: flex-end;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
}

.sidebar-section {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 15px;
}

.sidebar-section:last-child {
    border-bottom: none;
}

.sidebar-section-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #888;
    margin-bottom: 10px;
}

/* Language options in sidebar */
.sidebar .lang-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    cursor: pointer;
    color: white;
    font-size: 0.95rem;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    border-radius: 8px;
}

.sidebar .lang-option:hover {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar .lang-option.active {
    background: rgba(233, 69, 96, 0.2);
    color: #e94560;
}

/* Connection type in sidebar */
.sidebar-connection-info {
    padding: 10px;
    border-radius: 8px;
    font-size: 0.85rem;
    text-align: center;
}

/* Sidebar action buttons (logs, about) */
.sidebar-action {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    cursor: pointer;
    color: white;
    font-size: 1rem;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    border-radius: 8px;
}

.sidebar-action:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* DEV/production mode indicator at bottom of sidebar */
.sidebar-dev-badge {
    font-size: 0.75rem;
    padding: 6px 10px;
    border-radius: 6px;
    text-align: center;
    color: #888;
    background: rgba(255, 255, 255, 0.05);
}

.sidebar-dev-badge.dev-active {
    color: #ff9800;
    background: rgba(255, 152, 0, 0.15);
    border: 1px solid rgba(255, 152, 0, 0.3);
}

/* Fullscreen logs panel (replaces old half-height panel) */
.logs-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    color: #0f0;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    padding: 60px 15px 15px 15px; /* top padding for close/copy buttons */
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    z-index: 2500; /* Above sidebar */
}

/* Logs panel toolbar (close + copy buttons) */
.logs-toolbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: rgba(0, 0, 0, 0.98);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    z-index: 2501;
    border-bottom: 1px solid #333;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.logs-toolbar.visible {
    opacity: 1;
    pointer-events: auto;
}

.logs-toolbar button {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
}

.logs-toolbar button:hover {
    background: rgba(255, 255, 255, 0.2);
}

.logs-panel.visible {
    transform: translateY(0);
}

.logs-panel .log-entry {
    margin: 5px 0;
    word-wrap: break-word;
}

.logs-panel .log-time {
    color: #888;
}

.logs-panel .log-error {
    color: #f55;
}

.logs-panel .log-success {
    color: #5f5;
}

.logs-panel .log-info {
    color: #5af;
}

.logs-panel .log-debug {
    color: #a0a; /* Purple for debug messages */
}

/* Image preview */
.image-preview {
    max-width: 100%;
    border-radius: 10px;
    margin: 10px 0;
}

/* Received images list */
.received-images {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 20px 0;
}

.received-image-item {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 15px;
}

.received-image-item img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 10px;
}

/* Progress indicator */
.progress-bar {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    overflow: hidden;
    margin: 10px 0;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #e94560, #28a745);
    transition: width 0.3s ease;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 0.9rem;
}

/* Back link */
.back-link {
    display: inline-block;
    color: #e94560;
    text-decoration: none;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.back-link:hover {
    text-decoration: underline;
}

/* Section titles */
.section-title {
    font-size: 1.5rem;
    margin: 20px 0 10px 0;
    color: #e94560;
}

/* Hidden utility class - !important overrides flex/block/etc display values
   set by inline styles or other classes. Used for step-based wizard visibility. */
.hidden {
    display: none !important;
}

/* Choice buttons (for sender to choose camera vs file) */
.choice-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
}

/* ============ Image Cropping Modal ============ */
/*
 * Minimal document cropping UI for perspective-correcting scanned documents.
 * Four draggable corner handles allow marking document edges.
 * Pure CSS + vanilla JS, no external dependencies.
 */

.crop-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000; /* Above everything including logs panel (z-index: 1000) */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.crop-modal-header {
    color: white;
    text-align: center;
    margin-bottom: 10px;
}

.crop-modal-header h2 {
    font-size: 1.3rem;
    margin: 0 0 5px 0;
}

.crop-modal-header p {
    font-size: 0.9rem;
    color: #aaa;
    margin: 0;
}

/* Container for image + corner handles, sized to fit viewport */
.crop-canvas-container {
    position: relative;
    max-width: 100%;
    max-height: 60vh;
    touch-action: none; /* Prevent scrolling while dragging handles */
}

.crop-canvas-container img {
    max-width: 100%;
    max-height: 60vh;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
}

/* SVG overlay for corner lines - sits exactly over the image */
.crop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.crop-overlay polygon {
    fill: rgba(0, 0, 0, 0.4);
    stroke: #e94560;
    stroke-width: 2;
}

/* Draggable corner handles */
.crop-handle {
    position: absolute;
    width: 40px;
    height: 40px;
    background: #e94560;
    border: 3px solid white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    cursor: grab;
    touch-action: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    z-index: 10;
}

.crop-handle:active {
    cursor: grabbing;
    background: #ff6b8a;
}

/* Button row at bottom of modal */
.crop-buttons {
    display: flex;
    gap: 15px;
    margin-top: 15px;
    width: 100%;
    max-width: 400px;
}

.crop-buttons button {
    flex: 1;
    padding: 15px;
    font-size: 1.1rem;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    font-weight: bold;
}

.crop-btn-apply {
    background: #28a745;
    color: white;
}

.crop-btn-cancel {
    background: #6c757d;
    color: white;
}

/* Magnifier loupe: zoomed preview of the area under the dragged crop handle,
 * positioned away from the thumb so users can see exactly where the corner lands. */
.crop-magnifier {
    position: absolute;
    width: 124px;
    height: 124px;
    border: 2px solid #e94560;
    border-radius: 50%;
    overflow: hidden;
    pointer-events: none;
    z-index: 20;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.5), 0 4px 12px rgba(0,0,0,0.6);
    transform: translate(-50%, -50%);
}

.crop-magnifier canvas {
    display: block;
    width: 120px;
    height: 120px;
    border-radius: 50%;
}

/* Crosshair overlay in the center of the magnifier */
.crop-magnifier-crosshair {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.crop-magnifier-crosshair::before,
.crop-magnifier-crosshair::after {
    content: '';
    position: absolute;
    background: rgba(255, 255, 255, 0.8);
}

/* Vertical crosshair line */
.crop-magnifier-crosshair::before {
    width: 1px;
    height: 100%;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
}

/* Horizontal crosshair line */
.crop-magnifier-crosshair::after {
    width: 100%;
    height: 1px;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

/* ============ Toast Notifications ============ */
/*
 * Non-blocking inline notifications that replace alert() popups.
 * Toasts slide in from the top and auto-dismiss after a few seconds.
 * They don't block the UI, so users can still read logs and eruda output.
 */

.toast-container {
    position: fixed;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3000; /* Above everything including crop modal (2000) */
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 90%;
    max-width: 450px;
    pointer-events: none; /* Allow clicks through the container */
}

.toast {
    padding: 15px 20px;
    border-radius: 12px;
    font-size: 1rem;
    line-height: 1.4;
    white-space: pre-line;
    pointer-events: auto; /* Toasts themselves are clickable (to dismiss) */
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    animation: toast-slide-in 0.3s ease-out;
    /* Backdrop blur for visual separation from content behind */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.toast-error {
    background: rgba(220, 53, 69, 0.9);
    border: 1px solid #dc3545;
    color: white;
}

.toast-warn {
    background: rgba(255, 152, 0, 0.9);
    border: 1px solid #ff9800;
    color: white;
}

.toast-info {
    background: rgba(23, 162, 184, 0.9);
    border: 1px solid #17a2b8;
    color: white;
}

.toast-fade-out {
    animation: toast-fade-out 0.3s ease-in forwards;
}

@keyframes toast-slide-in {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-fade-out {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* Responsive adjustments for small screens (older/budget smartphones).
   Reduces font sizes to prevent text overflow while keeping touch targets large. */
@media (max-width: 400px) {
    h1 {
        font-size: 2rem;
    }

    .btn-text {
        font-size: 1.5rem;
    }

    .btn-icon {
        font-size: 2.5rem;
    }
}