/* ===== Watermark Tool - Modern Styles ===== */
.wm-layout { display: grid; grid-template-columns: 1fr 320px; gap: 28px; align-items: start; }
.wm-main { min-width: 0; }
.wm-card { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: 18px; padding: 32px; box-shadow: 0 4px 16px rgba(0,0,0,0.04); }
.wm-sidebar { display: flex; flex-direction: column; gap: 20px; }

.wm-upload { border: 2px dashed var(--border); border-radius: 16px; padding: 50px 20px; text-align: center; cursor: pointer; transition: all 0.25s; background: var(--bg-soft); }
.wm-upload:hover { border-color: var(--primary); background: var(--primary-50); }
.wm-upload.dragover { border-color: var(--primary); background: var(--primary-50); transform: scale(1.01); }
.wm-upload-icon { font-size: 48px; color: var(--primary); margin-bottom: 14px; opacity: 0.7; }
.wm-upload-text { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.wm-upload-sub { font-size: 13px; color: var(--text-muted); }

.wm-preview-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 20px; }
.wm-preview-box { background: var(--bg-soft); border-radius: 12px; border: 1px solid var(--border-light); overflow: hidden; }
.wm-preview-label { font-size: 12px; font-weight: 600; color: var(--text-muted); padding: 8px 12px; border-bottom: 1px solid var(--border-light); }
.wm-preview-img-wrap { padding: 10px; text-align: center; }
.wm-preview-img { max-width: 100%; max-height: 260px; border-radius: 6px; display: inline-block; }

.wm-section { margin-bottom: 18px; }
.wm-section-title { font-size: 13px; font-weight: 700; color: var(--text-secondary); margin-bottom: 10px; }
.wm-type-row { display: flex; gap: 10px; }
.wm-type-btn { padding: 9px 18px; border: 2px solid var(--border-light); border-radius: 10px; font-size: 13px; font-weight: 600; cursor: pointer; background: var(--bg); color: var(--text-secondary); transition: all 0.2s; font-family: inherit; display: inline-flex; align-items: center; gap: 6px; }
.wm-type-btn:hover { border-color: var(--primary); color: var(--primary); }
.wm-type-btn.active { background: linear-gradient(135deg, var(--primary), #8b5cf6); color: #fff; border-color: transparent; box-shadow: 0 3px 10px rgba(79,70,229,0.25); }

.wm-settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.wm-setting { display: flex; flex-direction: column; gap: 5px; }
.wm-label { font-size: 12px; font-weight: 600; color: var(--text-secondary); }
.wm-input { padding: 8px 12px; border: 2px solid var(--border-light); border-radius: 8px; font-size: 13px; outline: none; background: var(--bg); color: var(--text); transition: border-color 0.2s; font-family: inherit; }
.wm-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
.wm-color-input { width: 50px; height: 36px; padding: 2px; border: 2px solid var(--border-light); border-radius: 8px; cursor: pointer; background: var(--bg); }
.wm-range-row { display: flex; align-items: center; gap: 10px; }
.wm-range { flex: 1; -webkit-appearance: none; height: 6px; background: var(--bg-muted); border-radius: 6px; outline: none; cursor: pointer; }
.wm-range::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: var(--primary); cursor: pointer; }
.wm-range-val { font-size: 12px; font-weight: 700; color: var(--primary); min-width: 36px; text-align: right; }

.wm-wmark-upload { padding: 16px; border: 2px dashed var(--primary); border-radius: 10px; text-align: center; cursor: pointer; color: var(--primary); font-size: 13px; font-weight: 600; transition: all 0.2s; background: var(--primary-50); }
.wm-wmark-upload:hover { background: var(--primary); color: #fff; }
.wm-remove-btn { width: 24px; height: 24px; border-radius: 6px; background: rgba(239,68,68,0.1); color: #ef4444; border: none; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; font-size: 12px; margin-left: 8px; vertical-align: middle; }
.wm-remove-btn:hover { background: #ef4444; color: #fff; }

.wm-position-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; max-width: 240px; }
.wm-pos-btn { padding: 10px; border: 2px solid var(--border-light); border-radius: 10px; font-size: 18px; cursor: pointer; background: var(--bg); color: var(--text-secondary); transition: all 0.2s; text-align: center; }
.wm-pos-btn:hover { border-color: var(--primary); color: var(--primary); }
.wm-pos-btn.active { background: linear-gradient(135deg, var(--primary), #8b5cf6); color: #fff; border-color: transparent; }

.wm-actions { display: flex; gap: 12px; margin-top: 16px; }
.wm-action-btn { padding: 10px 24px; border-radius: 10px; font-size: 14px; font-weight: 700; cursor: pointer; transition: all 0.25s; font-family: inherit; display: inline-flex; align-items: center; gap: 8px; }
.wm-download-btn { background: linear-gradient(135deg, var(--primary), #8b5cf6); color: #fff; border: none; box-shadow: 0 3px 10px rgba(79,70,229,0.25); }
.wm-download-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(79,70,229,0.35); }
.wm-reset-btn { background: var(--bg); color: var(--text-secondary); border: 2px solid var(--border-light); }
.wm-reset-btn:hover { border-color: var(--primary); color: var(--primary); }

.wm-error { margin-top: 12px; padding: 12px 16px; background: #fef2f2; border: 1px solid #fecaca; border-radius: 12px; color: #dc2626; font-size: 13px; font-weight: 500; display: none; }
body[data-theme="dark"] .wm-error { background: rgba(239,68,68,0.1); border-color: rgba(239,68,68,0.3); color: #fca5a5; }

body[data-theme="dark"] .wm-card { background: var(--bg-card); border-color: var(--border); }
body[data-theme="dark"] .wm-upload { background: var(--bg-muted); border-color: var(--border); }
body[data-theme="dark"] .wm-upload:hover { border-color: var(--primary); background: var(--primary-50); }
body[data-theme="dark"] .wm-type-btn { background: var(--bg-muted); }
body[data-theme="dark"] .wm-pos-btn { background: var(--bg-muted); }
body[data-theme="dark"] .wm-input { background: var(--bg-muted); border-color: var(--border); }
body[data-theme="dark"] .sidebar-section { background: var(--bg-card); border-color: var(--border); }
body[data-theme="dark"] .sidebar-tool { background: var(--bg-muted); }
body[data-theme="dark"] .sidebar-tool:hover { background: var(--primary-50); }
body[data-theme="dark"] .ad-placeholder { background: var(--bg-card); border-color: var(--border); }
body[data-theme="dark"] .wm-wmark-upload { background: rgba(79,70,229,0.15); }
body[data-theme="dark"] .wm-preview-box { background: var(--bg-muted); border-color: var(--border); }

.wm-howto-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.wm-howto-list li { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-secondary); line-height: 1.4; }
.wm-howto-num { width: 24px; height: 24px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), #8b5cf6); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; flex-shrink: 0; }
.sidebar-section { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: 16px; padding: 20px; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.sidebar-header { text-align: center; padding: 28px 20px !important; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important; border-color: transparent !important; }
.sidebar-header h1 { font-size: 1.35rem; font-weight: 800; color: #fff; margin-bottom: 6px; text-shadow: 0 2px 8px rgba(0,0,0,0.2); }
.sidebar-header p { font-size: 0.82rem; color: rgba(255,255,255,0.85); }
body[data-theme="dark"] .sidebar-header { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important; }
.sidebar-title { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.sidebar-title i { color: var(--primary); font-size: 0.9rem; }
.sidebar-tools { display: flex; flex-direction: column; gap: 8px; }
.sidebar-tool { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 10px; transition: all 0.2s; text-decoration: none; background: var(--bg-soft); }
.sidebar-tool:hover { background: var(--primary-50); transform: translateX(3px); }
.sidebar-tool-icon { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: 10px; font-size: 16px; flex-shrink: 0; background: linear-gradient(135deg, #6366f1, #8b5cf6); color: #fff; }
.sidebar-tool-info { flex: 1; min-width: 0; }
.sidebar-tool-name { font-size: 0.9rem; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.sidebar-tool-desc { font-size: 0.78rem; color: var(--text-muted); }
.ad-placeholder { width: 300px; height: 250px; flex-shrink: 0; margin: 0 auto; background: var(--bg-card); border: 2px dashed var(--border); border-radius: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 20px; color: var(--text-muted); font-size: 0.82rem; line-height: 1.5; }

@media (max-width: 1024px) { .wm-layout { grid-template-columns: 1fr 280px; gap: 20px; } }
@media (max-width: 860px) { .wm-layout { grid-template-columns: 1fr; } .wm-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; } }
@media (max-width: 768px) { .wm-card { padding: 20px; } .wm-preview-row { grid-template-columns: 1fr; } .wm-settings-grid { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .wm-sidebar { grid-template-columns: 1fr; } }