/* ============================================================
   DOCUMENT SCANNER MODAL — WhatsApp-style book cover scanner
   ============================================================ */

/* Full-screen overlay */
#doc-scanner-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: #000;
    flex-direction: column;
    align-items: stretch;
}

#doc-scanner-modal.active {
    display: flex;
}

/* Scanner Header Bar */
.scanner-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    padding-top: max(16px, env(safe-area-inset-top));
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 10;
    flex-shrink: 0;
}

.scanner-header h3 {
    color: white;
    font-size: 17px;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.2px;
}

.scanner-header-hint {
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    font-weight: 500;
    text-align: center;
    margin-top: 2px;
}

.scanner-close-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: background 0.2s;
    flex-shrink: 0;
}

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

/* Camera viewfinder area */
.scanner-viewfinder-wrap {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

#scanner-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Dark vignette overlay on the camera feed */
.scanner-vignette {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,0.65) 100%);
}

/* Document frame guide — the white-border rectangle */
.scanner-doc-frame {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(85%, 340px);
    /* A4-ish portrait ratio */
    aspect-ratio: 3 / 4;
    pointer-events: none;
    z-index: 5;
}

/* 4 corner brackets */
.scanner-corner {
    position: absolute;
    width: 28px;
    height: 28px;
    border-color: #25D366;
    border-style: solid;
    border-width: 0;
    transition: all 0.3s ease;
}

.scanner-corner.tl { top: 0; left: 0;   border-top-width: 3.5px; border-left-width: 3.5px;  border-top-left-radius: 4px; }
.scanner-corner.tr { top: 0; right: 0;  border-top-width: 3.5px; border-right-width: 3.5px; border-top-right-radius: 4px; }
.scanner-corner.bl { bottom: 0; left: 0;  border-bottom-width: 3.5px; border-left-width: 3.5px;   border-bottom-left-radius: 4px; }
.scanner-corner.br { bottom: 0; right: 0; border-bottom-width: 3.5px; border-right-width: 3.5px;  border-bottom-right-radius: 4px; }

/* The thin border of the document frame */
.scanner-doc-border {
    position: absolute;
    inset: 0;
    border: 1.5px solid rgba(37, 211, 102, 0.35);
    border-radius: 3px;
    transition: border-color 0.3s ease;
}

/* Animated scan line sweeping down */
.scanner-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 2.5px;
    background: linear-gradient(90deg, transparent, #25D366 30%, rgba(37,211,102,0.8) 70%, transparent);
    box-shadow: 0 0 10px rgba(37, 211, 102, 0.8), 0 0 20px rgba(37, 211, 102, 0.4);
    animation: scan-sweep 2.5s ease-in-out infinite;
    border-radius: 2px;
    z-index: 6;
    transition: opacity 0.3s;
}

@keyframes scan-sweep {
    0%   { top: 5%; opacity: 0; }
    5%   { opacity: 1; }
    50%  { top: 95%; }
    95%  { opacity: 1; }
    100% { top: 95%; opacity: 0; }
}

/* Guide text inside the frame */
.scanner-frame-label {
    position: absolute;
    bottom: -32px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
    letter-spacing: 0.3px;
    transition: color 0.3s ease;
    text-shadow: 0 2px 4px rgba(0,0,0,0.8);
}

/* ── AUTO DETECT STATES ── */

/* Searching state: corners pulse slightly */
.frame-searching .scanner-corner {
    animation: corner-pulse 1.5s ease-in-out infinite alternate;
}

@keyframes corner-pulse {
    0% { transform: scale(1); opacity: 0.7; }
    100% { transform: scale(1.05); opacity: 1; }
}

/* Detected state: corners lock tightly, scanline hides */
.frame-detected .scanner-corner {
    border-color: #25D366;
    border-width: 5px;
    width: 34px;
    height: 34px;
    box-shadow: 0 0 12px rgba(37, 211, 102, 0.4);
}
.frame-detected .scanner-doc-border {
    border-color: rgba(37, 211, 102, 0.8);
}
.frame-detected .scanner-line {
    opacity: 0;
}
.frame-detected .scanner-frame-label {
    color: #25D366;
}

/* Countdown bar around the frame during auto-capture delay */
.scanner-doc-frame::after {
    content: '';
    position: absolute;
    inset: -6px;
    border: 3px solid transparent;
    border-radius: 6px;
    pointer-events: none;
}
.scanner-doc-frame.counting::after {
    border-top-color: #25D366;
    border-right-color: #25D366;
    border-bottom-color: #25D366;
    border-left-color: #25D366;
    /* Simulate a drawing border by animating clip-path */
    animation: draw-border var(--countdown-ms) linear forwards;
}

@keyframes draw-border {
    0%   { clip-path: polygon(0 0, 0 0, 0 0, 0 0, 0 0); }
    25%  { clip-path: polygon(0 0, 100% 0, 100% 0, 100% 0, 0 0); }
    50%  { clip-path: polygon(0 0, 100% 0, 100% 100%, 100% 100%, 0 0); }
    75%  { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 0); }
    100% { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 0); }
}

/* Capturing finish flash */
.frame-capturing::before {
    content: '';
    position: absolute;
    inset: -500px;
    background: white;
    z-index: 99;
    animation: flash 0.3s ease-out forwards;
}

@keyframes flash {
    0% { opacity: 0; }
    30% { opacity: 1; }
    100% { opacity: 0; }
}

/* ── PREVIEW phase ──────────────────────────────────────── */
.scanner-preview-wrap {
    display: none;
    flex: 1;
    position: relative;
    overflow: hidden;
    align-items: center;
    justify-content: center;
    background: #1a1a1a;
}

.scanner-preview-wrap.active {
    display: flex;
}

#scanner-preview-canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 0 40px rgba(0,0,0,0.6);
}

/* Processing overlay (shown during canvas post-processing) */
.scanner-processing-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.75);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
    z-index: 20;
    color: white;
    font-weight: 700;
}

.scanner-processing-overlay.active {
    display: flex;
}

.scanner-processing-overlay .scan-spinner {
    width: 44px;
    height: 44px;
    border: 4px solid rgba(37, 211, 102, 0.2);
    border-top: 4px solid #25D366;
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

/* ── Bottom Controls ─────────────────────────────────────── */
.scanner-controls {
    padding: 20px 24px;
    padding-bottom: max(20px, env(safe-area-inset-bottom));
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-shrink: 0;
    z-index: 10;
}

/* Capture phase controls */
.scanner-capture-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Shutter button (big circle) */
.scanner-shutter-btn {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: white;
    border: 4px solid rgba(255,255,255,0.3);
    cursor: pointer;
    position: relative;
    transition: transform 0.15s cubic-bezier(0.165, 0.84, 0.44, 1);
    flex-shrink: 0;
    outline: none;
    box-shadow: 0 0 0 6px rgba(255,255,255,0.1);
}

.scanner-shutter-btn::after {
    content: '';
    position: absolute;
    inset: 5px;
    border-radius: 50%;
    background: rgba(37, 211, 102, 0.9);
    transition: background 0.2s;
}

.scanner-shutter-btn:hover::after { background: #25D366; }
.scanner-shutter-btn:active { transform: scale(0.88); }

/* File upload alternative */
.scanner-upload-btn {
    background: rgba(255, 255, 255, 0.12);
    border: 1.5px solid rgba(255,255,255,0.25);
    color: white;
    padding: 10px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
    white-space: nowrap;
}

.scanner-upload-btn:hover { background: rgba(255,255,255,0.2); }
.scanner-upload-btn i { font-size: 16px; }

/* Flash toggle */
.scanner-flash-btn {
    background: rgba(255, 255, 255, 0.12);
    border: 1.5px solid rgba(255,255,255,0.25);
    color: rgba(255,255,255,0.8);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.scanner-flash-btn.on {
    background: #f59e0b;
    border-color: #f59e0b;
    color: white;
}

/* Preview phase controls */
.scanner-preview-controls {
    display: flex;
    gap: 12px;
}

.scanner-retake-btn {
    flex: 1;
    background: rgba(255,255,255,0.12);
    border: 1.5px solid rgba(255,255,255,0.25);
    color: white;
    padding: 16px;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background 0.2s;
    font-family: inherit;
}

.scanner-retake-btn:hover { background: rgba(255,255,255,0.2); }

.scanner-save-btn {
    flex: 2;
    background: linear-gradient(135deg, #128C7E, #25D366);
    border: none;
    color: white;
    padding: 16px;
    border-radius: 14px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
    font-family: inherit;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35);
}

.scanner-save-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(37, 211, 102, 0.45); }
.scanner-save-btn:active { transform: scale(0.97); }
.scanner-save-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

/* ── Book cover display in detail view ─────────────────── */
.book-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
}

.book-cover-img-card {
    width: 85px;
    height: 120px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Add cover button in book detail - updated to match primary theme */
.btn-add-cover {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(8, 51, 68, 0.15);
}

.btn-add-cover:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(8, 51, 68, 0.25);
}

/* Toast notification */
.scanner-toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #128C7E;
    color: white;
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 700;
    z-index: 99999;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
    pointer-events: none;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.scanner-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Scanned image filter (document effect) */
.doc-scan-filter {
    filter: contrast(1.35) brightness(1.08) saturate(0.85);
}