/* ============================================ */
/* ANNOTATION STYLES */
/* ============================================ */

/* Annotation Toolbar */
.annotation-toolbar {
    position: fixed;
    top: 100px;
    right: 30px;
    bottom: auto;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    box-shadow: 0 8px 32px var(--glass-shadow);
    padding: 10px;
    display: flex;
    gap: 10px;
    z-index: 1000;
    transition: all 0.3s;
}

.annotation-toolbar.hidden {
    transform: translateX(150%);
}

.annotation-btn {
    width: 100%;
}

/* .annotation-btn:hover {
    background: var(--bg-card-dark);
    transform: scale(1.1);
} */

.annotation-btn.active {
    background: var(--primary-gradient);
    color: var(--text-primary);
}

.annotation-btn svg {
    width: 20px;
    height: 20px;
}

.annotation-btn-tooltip {
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-card-dark);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    margin-right: 10px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.annotation-btn:hover .annotation-btn-tooltip {
    opacity: 1;
}

/* Color Picker Popup */
.color-picker-popup {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-card-dark);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--glass-shadow);
    padding: 15px;
    margin-bottom: 10px;
    display: none;
}

.color-picker-popup.active {
    display: block;
}

.color-picker-title {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.color-picker-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.color-option {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.active {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px var(--bg-dark), 0 0 0 4px var(--primary-light);
}

/* Highlight Overlay */
.pdf-page {
    position: relative;
}

.highlight-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

.highlight-selection-preview {
    pointer-events: none !important;
    z-index: 3;
    border-radius: 2px;
}

.highlight-mark {
    position: absolute;
    opacity: 0.4;
    pointer-events: all;
    cursor: pointer;
    transition: opacity 0.2s;
}

.highlight-mark:hover {
    opacity: 0.6;
}

.highlight-mark.yellow { background: #FFFF00; }
.highlight-mark.green { background: #00FF00; }
.highlight-mark.blue { background: #00BFFF; }
.highlight-mark.pink { background: #FF69B4; }
.highlight-mark.orange { background: #FFA500; }
.highlight-mark.purple { background: #9370DB; }

/* Note Icon */
.note-icon {
    position: absolute;
    width: 24px;
    height: 24px;
    background: #FFD700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 2;
    transition: all 0.2s;
}

.note-icon:hover {
    transform: scale(1.2);
}

.note-icon svg {
    width: 14px;
    height: 14px;
    fill: var(--bg-dark);
}

/* Note Popup */
.note-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-card-dark);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 8px 32px var(--glass-shadow);
    padding: 25px;
    max-width: 500px;
    width: 90%;
    z-index: 9999;
    display: none;
}

.note-popup.active {
    display: block;
}

.note-popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9998;
    display: none;
}

.note-popup-overlay.active {
    display: block;
}

.note-popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.note-popup-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--text-primary);
}

.note-popup-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--bg-card-hover);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.note-popup-close:hover { background: var(--glass-bg); }

.note-textarea {
    width: 100%;
    min-height: 150px;
    padding: 12px;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 15px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary);
}

.note-textarea::placeholder { color: var(--text-tertiary); }
.note-textarea:focus { outline: none; border-color: var(--primary); }

.note-popup-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.note-btn {
    padding: 10px 24px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.note-btn-cancel {
    background: var(--glass-bg);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.note-btn-cancel:hover { background: var(--bg-card-hover); }
.note-btn-save { background: var(--primary-gradient); color: var(--text-primary); }
.note-btn-save:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(50, 159, 255, 0.3); }
.note-btn-delete { background: #dc3545; color: white; }
.note-btn-delete:hover { background: #c82333; }

/* Selection Mode */
.pdf-page.selection-mode { cursor: crosshair; }
.pdf-page.selection-mode canvas { user-select: none; -webkit-user-select: none; }

/* Annotation List Sidebar */
.annotation-sidebar {
    position: fixed;
    right: -350px;
    top: 0;
    width: 350px;
    height: 100vh;
    background: var(--bg-card-dark);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-left: 1px solid var(--glass-border);
    box-shadow: -2px 0 10px var(--glass-shadow);
    z-index: 1001;
    transition: right 0.3s;
    overflow-y: auto;
}

.annotation-sidebar.active { right: 0; }

.annotation-sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: var(--bg-card-dark);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 10;
}

.annotation-sidebar-title { font-size: 18px; font-weight: bold; color: var(--text-primary); }

.annotation-sidebar-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--bg-card-hover);
    color: var(--text-primary);
    cursor: pointer;
}

.annotation-sidebar-close:hover { background: var(--glass-bg); }
.annotation-sidebar-list { padding: 20px; }

.annotation-item {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
    cursor: pointer;
    transition: all 0.2s;
}

.annotation-item:hover {
    background: var(--bg-card-hover);
    transform: translateX(-5px);
}

.annotation-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.annotation-item-page { font-size: 12px; font-weight: 600; color: var(--primary); }

.annotation-item-delete {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: #dc3545;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.annotation-item-text { font-size: 14px; color: var(--text-secondary); line-height: 1.5; }
.annotation-item-highlight { border-left: 4px solid; }
.annotation-item-note { border-left: 4px solid #FFD700; }

/* Responsive */
@media (max-width: 768px) {
    .annotation-toolbar {
        top: 80px;
        right: 15px;
        bottom: auto;
    }

    .annotation-sidebar {
        width: 100%;
        right: -100%;
    }

    .document-header { padding-top: 20px !important; }

    .document-header .d-flex[style*="position: absolute"] {
        position: relative !important;
        top: auto !important;
        right: auto !important;
        justify-content: center;
        margin-bottom: 20px;
    }

    .document-title {
        font-size: 24px !important;
        line-height: 1.2 !important;
    }

    .info-card { margin-bottom: 20px !important; }
    .document-header .col-12 .d-flex { justify-content: flex-start !important; }
    #btn-save-library span,
    #btn-download-library span { display: none; }
    #btn-save-library,
    #btn-download-library { padding: 10px !important; }

    .document-header .d-flex.flex-wrap { gap: 0.5rem !important; }
    .document-tag {
        font-size: 11px !important;
        padding: 4px 10px !important;
    }

    .document-stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }

    .main-content-card {
        padding: 16px !important;
        border-radius: 16px !important;
    }

    .pdf-preview-section .bg-gray-100\/80 { padding: 12px !important; }
    #pdf-viewer { padding: 12px !important; }

    .container-lg {
        padding-left: 15px;
        padding-right: 15px;
    }
}

@media (max-width: 576px) {
    .document-title {
        font-size: 20px !important;
        margin-bottom: 16px !important;
    }

    .document-stats-grid {
        grid-template-columns: 1fr !important;
        gap: 10px !important;
    }

    .info-card {
        padding: 16px !important;
        border-radius: 12px !important;
    }

    .section-title {
        font-size: 16px !important;
        margin-bottom: 12px !important;
    }

    .document-description {
        font-size: 13px !important;
        margin-bottom: 16px !important;
    }

    #btn-save-library,
    #btn-download-library,
    #btn-favorite-library,
    #btn-share-library {
        width: 40px !important;
        height: 40px !important;
        padding: 8px !important;
    }

    #btn-save-library svg,
    #btn-download-library svg,
    #btn-favorite-library svg,
    #btn-share-library svg {
        width: 18px !important;
        height: 18px !important;
        margin-right: 0 !important;
    }

    nav.d-flex {
        font-size: 12px !important;
        margin-bottom: 16px !important;
    }

    .main-content-card { padding: 12px !important; }
    .pdf-preview-section .bg-gray-100\/80 { padding: 8px !important; }
    #pdf-viewer { padding: 8px !important; }
}

@media (max-width: 480px) {
    .document-title { font-size: 18px !important; }
    .container-lg {
        padding-left: 10px;
        padding-right: 10px;
    }
    .info-card { padding: 12px !important; }
    .main-content-card { padding: 10px !important; }
}

@media (max-width: 991px) {
    html, body {
        overflow-x: hidden;
        max-width: 100vw;
    }

    .container-lg {
        max-width: 100%;
        overflow-x: hidden;
        padding-left: 15px;
        padding-right: 15px;
    }

    .document-title {
        word-wrap: break-word;
        overflow-wrap: break-word;
        hyphens: auto;
        max-width: 100%;
    }

    .document-header .d-flex { flex-wrap: wrap; }
    .document-header .d-flex.flex-wrap { flex-wrap: wrap !important; }

    nav.d-flex {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    nav.d-flex::-webkit-scrollbar { display: none; }

    img, video, iframe {
        max-width: 100%;
        height: auto;
    }

    #pdf-viewer {
        max-width: 100%;
        overflow-x: auto;
    }
}

@media (min-width: 577px) and (max-width: 768px) {
    .document-stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    .document-title {
        font-size: 28px !important;
    }
}

/* Zoom controls trong toolbar */
.zoom-controls-toolbar {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    padding: 8px 20px;
    box-shadow: 0 8px 32px var(--glass-shadow);
}

.zoom-btn-toolbar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--bg-card-hover);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    padding: 0;
}

.zoom-btn-toolbar:hover {
    background: var(--glass-bg);
    transform: scale(1.05);
}

.zoom-btn-toolbar:active {
    transform: scale(0.95);
}

.zoom-info-toolbar {
    font-weight: bold;
    min-width: 60px;
    text-align: center;
    font-size: 15px;
    color: var(--text-primary);
}

.page-counter-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    padding: 8px 20px;
    box-shadow: 0 8px 32px var(--glass-shadow);
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
}

#pdf-viewer {
    background: var(--bg-darker);
    height: 100vh !important;
    overflow-y: auto;
    padding: 20px;
    position: relative;
}

#content { position: relative; }
#content h3 { color: var(--text-primary); }
#content .text-primary { color: var(--primary-light) !important; }
#content svg { fill: var(--text-primary); }

.bg-black {
    background: var(--primary-gradient) !important;
    box-shadow: 0 4px 16px rgba(50, 159, 255, 0.3);
    transition: all 0.3s;
}

.bg-black:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(50, 159, 255, 0.4);
}

.edit_pdf { position: relative; }

.edit_pdf > div {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 8px 32px var(--glass-shadow);
}