/* ============================================================
   PDF Watermark Tool — pdf-watermark.css
   Prefix: pw-
   Accent: #6366F1  (site primary indigo)
   ============================================================ */

/* ── Accent override ───────────────────────────────────────── */
.pw-section {
    --tool-accent: var(--primary-color, #6366F1);
    padding: 40px 0 80px;
}

/* ── Section badge ─────────────────────────────────────────── */
.pw-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.22);
    border-radius: 50px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary-color, #6366F1);
    margin-bottom: 12px;
}

.pw-badge i {
    font-size: 0.875rem;
}

/* ── Upload Zone ───────────────────────────────────────────── */
.pw-upload-zone {
    display: block;
    border: 2px dashed rgba(99, 102, 241, 0.32);
    border-radius: 16px;
    background: rgba(99, 102, 241, 0.03);
    padding: 56px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    outline: none;
}

.pw-upload-zone:hover,
.pw-upload-zone:focus-visible {
    border-color: rgba(99, 102, 241, 0.6);
    background: rgba(99, 102, 241, 0.07);
}

.pw-upload-zone.pw-drag-over {
    border-color: var(--primary-color, #6366F1);
    background: rgba(99, 102, 241, 0.1);
}

.pw-upload-icon {
    font-size: 3rem;
    color: var(--primary-color, #6366F1);
    opacity: 0.65;
    margin-bottom: 14px;
    display: block;
}

.pw-upload-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 6px;
}

.pw-upload-sub {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0 0 10px;
}

.pw-upload-formats {
    font-size: 0.8125rem;
    color: var(--text-tertiary, #9CA3AF);
    margin: 0;
}

/* ── Workspace layout ──────────────────────────────────────── */
.pw-workspace {
    display: block;
}

.pw-layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 24px;
    align-items: start;
}

/* ── Controls column ───────────────────────────────────────── */
.pw-col-controls {
    background: var(--bg-card, #fff);
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 14px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* ── Mode tabs ─────────────────────────────────────────────── */
.pw-mode-tabs {
    display: flex;
    gap: 6px;
    background: var(--bg-secondary, #F9FAFB);
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 10px;
    padding: 4px;
    margin-bottom: 18px;
}

.pw-mode-tab {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    border: none;
    border-radius: 7px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.pw-mode-tab--active {
    background: var(--primary-gradient, linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%));
    color: #fff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.pw-mode-tab:not(.pw-mode-tab--active):hover {
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary-color, #6366F1);
}

/* ── Options panels ────────────────────────────────────────── */
.pw-opts-panel {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* ── Form fields ───────────────────────────────────────────── */
.pw-field {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.pw-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    align-items: end;
}

.pw-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.pw-val-badge {
    display: inline-block;
    min-width: 30px;
    padding: 1px 6px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 4px;
    color: var(--primary-color, #6366F1);
    font-weight: 700;
    font-size: 0.75rem;
    text-align: center;
}

.pw-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-input, #fff);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: border-color 0.15s, box-shadow 0.15s;
    box-sizing: border-box;
}

.pw-input:focus {
    outline: none;
    border-color: var(--primary-color, #6366F1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.pw-select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-input, #fff);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    box-sizing: border-box;
}

.pw-select:focus {
    outline: none;
    border-color: var(--primary-color, #6366F1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.pw-color-input {
    width: 44px;
    height: 38px;
    padding: 2px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    cursor: pointer;
    background: var(--bg-input, #fff);
}

.pw-color-input:focus {
    outline: none;
    border-color: var(--primary-color, #6366F1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.pw-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--border-color, #E5E7EB);
    cursor: pointer;
    outline: none;
}

.pw-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-gradient, linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%));
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(99, 102, 241, 0.4);
}

.pw-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color, #6366F1);
    cursor: pointer;
    border: none;
    box-shadow: 0 1px 4px rgba(99, 102, 241, 0.4);
}

/* ── Image upload zone (inside controls) ───────────────────── */
.pw-img-upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    border: 2px dashed rgba(99, 102, 241, 0.3);
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.03);
    padding: 20px 12px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    text-align: center;
}

.pw-img-upload-zone:hover,
.pw-img-upload-zone:focus-visible {
    border-color: rgba(99, 102, 241, 0.6);
    background: rgba(99, 102, 241, 0.07);
}

.pw-img-upload-zone.pw-img-drag-over {
    border-color: var(--primary-color, #6366F1);
    background: rgba(99, 102, 241, 0.1);
}

.pw-img-upload-icon {
    font-size: 1.75rem;
    color: var(--primary-color, #6366F1);
    opacity: 0.6;
}

.pw-img-upload-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 500;
}

.pw-img-upload-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary, #9CA3AF);
    margin: 0;
}

.pw-img-upload-zone.pw-img-loaded .pw-img-upload-icon {
    color: #16A34A;
    opacity: 1;
}

.pw-img-upload-zone.pw-img-loaded .pw-img-upload-text {
    color: var(--text-primary);
    font-weight: 600;
}

/* ── Divider + section labels ──────────────────────────────── */
.pw-divider {
    height: 1px;
    background: var(--border-color, #E5E7EB);
    margin: 16px 0;
}

.pw-section-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 0 0 10px;
}

/* ── Position grid ─────────────────────────────────────────── */
.pw-pos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    max-width: 160px;
    margin-bottom: 4px;
}

.pw-pos-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 1;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 7px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.pw-pos-btn:hover {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--primary-color, #6366F1);
}

.pw-pos-btn.pw-pos-active {
    background: var(--primary-gradient, linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%));
    border-color: var(--primary-color, #6366F1);
    color: #fff;
}

/* ── Section label row (label + inline tile toggle) ───────── */
.pw-section-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.pw-section-label-row .pw-section-label {
    margin-bottom: 0;
}

/* ── Tile toggle ───────────────────────────────────────────── */
.pw-tile-toggle {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    user-select: none;
}

.pw-tile-toggle input[type="checkbox"] {
    accent-color: var(--primary-color, #6366F1);
    width: 15px;
    height: 15px;
    cursor: pointer;
}

/* ── Page range input ──────────────────────────────────────── */
.pw-range-row {
    margin-top: 10px;
}

/* ── Slider + number input row ─────────────────────────────── */
.pw-slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pw-slider-row .pw-slider {
    flex: 1;
    min-width: 0;
}

.pw-num-input {
    width: 58px;
    flex-shrink: 0;
    padding: 5px 7px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 7px;
    background: var(--bg-input, #fff);
    color: var(--text-primary);
    font-size: 0.8125rem;
    font-weight: 600;
    text-align: center;
    -moz-appearance: textfield;
}

.pw-num-input::-webkit-outer-spin-button,
.pw-num-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

.pw-num-input:focus {
    outline: none;
    border-color: var(--primary-color, #6366F1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.pw-num-unit {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary, #9CA3AF);
    flex-shrink: 0;
    min-width: 14px;
}

/* ── Drag-to-position hint ─────────────────────────────────── */
.pw-drag-hint {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 10px 12px;
    background: var(--bg-secondary, #F9FAFB);
    border: 1px dashed var(--border-color, #E5E7EB);
    border-radius: 8px;
}

.pw-drag-hint i {
    font-size: 1rem;
    color: var(--primary-color, #6366F1);
    flex-shrink: 0;
}

/* ── Preview canvas: crosshair cursor for drag-to-position ─── */
#pw-preview-canvas {
    display: block;
    max-width: 100%;
    cursor: crosshair;
}

/* ── Apply to radios ───────────────────────────────────────── */
.pw-applytο-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.pw-radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
}

.pw-radio {
    accent-color: var(--primary-color, #6366F1);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* ── Preview column ────────────────────────────────────────── */
.pw-col-preview {
    min-width: 0;
}

.pw-preview-card {
    background: var(--bg-card, #fff);
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 14px;
    overflow: hidden;
}

.pw-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color, #E5E7EB);
    background: var(--bg-secondary, #F9FAFB);
    gap: 12px;
}

.pw-preview-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.pw-preview-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pw-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 6px;
    background: var(--bg-card, #fff);
    color: var(--text-secondary);
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
}

.pw-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pw-nav-btn:not(:disabled):hover {
    border-color: var(--primary-color, #6366F1);
    color: var(--primary-color, #6366F1);
}

.pw-page-indicator {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    min-width: 90px;
    text-align: center;
}

.pw-canvas-wrap {
    position: relative;
    background: var(--bg-secondary, #F9FAFB);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.pw-canvas-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--bg-secondary, #F9FAFB);
    z-index: 2;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.pw-canvas-loading[hidden] {
    display: none;
}

.pw-spin {
    font-size: 1.5rem;
    color: var(--primary-color, #6366F1);
    animation: pw-spin 1s linear infinite;
    display: block;
}

@keyframes pw-spin {
    to {
        transform: rotate(360deg);
    }
}

#pw-preview-canvas {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

/* ── Action bar ────────────────────────────────────────────── */
.pw-action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
    padding: 16px 20px;
    background: var(--bg-card, #fff);
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 12px;
}

.pw-action-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pw-action-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.pw-change-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    background: var(--bg-secondary, #F9FAFB);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
    text-decoration: none;
}

.pw-change-btn:hover {
    border-color: var(--primary-color, #6366F1);
    color: var(--primary-color, #6366F1);
}

.pw-filename-wrap {
    display: flex;
    align-items: center;
    border: 1px solid var(--border-color, #E5E7EB);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-input, #fff);
}

.pw-filename-input {
    padding: 8px 10px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.875rem;
    min-width: 160px;
    max-width: 240px;
    outline: none;
}

.pw-filename-ext {
    padding: 8px 10px 8px 4px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--bg-secondary, #F9FAFB);
    border-left: 1px solid var(--border-color, #E5E7EB);
    white-space: nowrap;
}

.pw-btn-apply {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: var(--primary-gradient, linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%));
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s, box-shadow 0.2s;
    box-shadow: var(--shadow-button, 0px 4px 14px rgba(99, 102, 241, 0.3));
    white-space: nowrap;
}

.pw-btn-apply:hover {
    opacity: 0.9;
    box-shadow: 0px 6px 20px rgba(99, 102, 241, 0.4);
}

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

.pw-btn-apply:disabled {
    background: var(--text-tertiary, #9CA3AF);
    cursor: not-allowed;
    transform: none;
}

/* ── Status ────────────────────────────────────────────────── */
.pw-status {
    margin-top: 14px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.4;
}

.pw-status[hidden] {
    display: none;
}

.pw-status--success {
    background: rgba(22, 163, 74, 0.08);
    border: 1px solid rgba(22, 163, 74, 0.25);
    color: #15803D;
}

.pw-status--error {
    background: rgba(220, 38, 38, 0.08);
    border: 1px solid rgba(220, 38, 38, 0.25);
    color: #B91C1C;
}

.pw-status--info {
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.25);
    color: #1D4ED8;
}

/* ── Progress bar ──────────────────────────────────────────── */
.pw-progress-wrap {
    margin-top: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.pw-progress-wrap[hidden] {
    display: none;
}

.pw-progress-bar {
    flex: 1;
    height: 6px;
    background: var(--border-color, #E5E7EB);
    border-radius: 3px;
    overflow: hidden;
}

.pw-progress-fill {
    height: 100%;
    width: 0;
    background: var(--primary-gradient, linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.pw-progress-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    white-space: nowrap;
    min-width: 140px;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
    .pw-layout {
        grid-template-columns: 1fr;
    }

    .pw-col-controls {
        order: 2;
    }

    .pw-col-preview {
        order: 1;
    }
}

@media (max-width: 600px) {
    .pw-section {
        padding: 24px 0 60px;
    }

    .pw-upload-zone {
        padding: 40px 16px;
    }

    .pw-action-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .pw-action-right {
        flex-direction: column;
        align-items: stretch;
    }

    .pw-filename-input {
        min-width: 0;
        max-width: 100%;
        width: 100%;
    }

    .pw-btn-apply {
        justify-content: center;
    }

    .pw-change-btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .pw-row {
        grid-template-columns: 1fr;
    }

    .pw-color-input {
        width: 100%;
    }

    .pw-preview-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}