/* ============================================
   PDF Tools — css/style.css
   Author: gorupa (https://github.com/gorupa)
   License: MIT
   ============================================ */

:root {
    --primary:       #7c3aed;
    --primary-hover: #6d28d9;
    --primary-light: #ede9fe;
    --surface:       #ffffff;
    --background:    #f5f3ff;
    --text-main:     #1c1e21;
    --text-muted:    #5f6368;
    --border:        #e0d9f7;
    --success:       #1e8e3e;
    --success-light: #e6f4ea;
    --danger:        #d93025;
    --danger-light:  #fce8e6;
    --shadow-sm:     0 1px 3px rgba(0,0,0,0.08);
    --shadow-md:     0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg:     0 12px 40px rgba(124,58,237,0.12), 0 4px 16px rgba(0,0,0,0.06);
    --radius:        20px;
    --radius-sm:     12px;
}

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

body {
    font-family: 'DM Sans', sans-serif;
    background-color: var(--background);
    background-image:
        radial-gradient(ellipse 90% 60% at 50% -5%, rgba(124,58,237,0.13) 0%, transparent 65%),
        radial-gradient(ellipse 55% 45% at 92% 95%, rgba(109,40,217,0.07) 0%, transparent 55%),
        radial-gradient(ellipse 40% 40% at 5% 80%, rgba(124,58,237,0.05) 0%, transparent 50%);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 32px 20px;
    gap: 20px;
}

/* ── Animations ── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse-ring {
    0%   { box-shadow: 0 0 0 0 rgba(124,58,237,0.25); }
    70%  { box-shadow: 0 0 0 10px rgba(124,58,237,0); }
    100% { box-shadow: 0 0 0 0 rgba(124,58,237,0); }
}
@keyframes pop-in {
    0%   { opacity: 0; transform: scale(0.88); }
    70%  { transform: scale(1.03); }
    100% { opacity: 1; transform: scale(1); }
}
@keyframes check-bounce {
    0%   { transform: scale(0) rotate(-10deg); }
    60%  { transform: scale(1.15) rotate(3deg); }
    100% { transform: scale(1) rotate(0deg); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer {
    0%   { background-position: -600px 0; }
    100% { background-position: 600px 0; }
}

/* ── Badge Strip ── */
.badge-strip {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    animation: fadeUp 0.5s ease both;
}
.pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 13px;
    border-radius: 100px;
    font-size: 0.71rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    border: 1px solid transparent;
    transition: transform 0.15s, box-shadow 0.15s;
    cursor: default;
    user-select: none;
}
.pill:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.pill .material-icons-round { font-size: 13px; }
.pill-mit    { background: #fff8e1; color: #92400e; border-color: #fde68a; }
.pill-oss    { background: #ede9fe; color: #4c1d95; border-color: #c4b5fd; }
.pill-adfree { background: #ecfdf5; color: #065f46; border-color: #6ee7b7; }
.pill-local  { background: var(--primary-light); color: #4c1d95; border-color: #c4b5fd; }

/* ── Container ── */
.container {
    max-width: 580px;
    width: 100%;
    animation: fadeUp 0.5s ease 0.08s both;
}

/* ── Header ── */
.header { text-align: center; margin-bottom: 28px; }

.hero-icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 68px; height: 68px;
    background: linear-gradient(135deg, #ede9fe 0%, #ddd6fe 100%);
    border-radius: 20px;
    margin-bottom: 16px;
    animation: pulse-ring 2.5s ease-in-out infinite;
}
.hero-icon { font-size: 34px; color: var(--primary); }

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.6px;
    margin-bottom: 7px;
    background: linear-gradient(135deg, var(--text-main) 0%, #3c4043 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.header p { color: var(--text-muted); font-size: 0.925rem; line-height: 1.5; }

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #1a73e8;
    text-decoration: none;
    padding: 4px 12px;
    border-radius: 100px;
    background: #e8f0fe;
    border: 1px solid #93c5fd;
    transition: all 0.15s;
}
.tool-link:hover { background: #dbeafe; transform: translateY(-1px); }
.tool-link .material-icons-round { font-size: 14px; }

/* ── Tab Switcher ── */
.tab-bar {
    display: flex;
    background: #ede9fe;
    border-radius: var(--radius-sm);
    padding: 4px;
    gap: 4px;
    margin-bottom: 20px;
}
.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 8px;
    border-radius: 9px;
    border: none;
    background: transparent;
    color: #6d28d9;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.tab-btn .material-icons-round { font-size: 16px; }
.tab-btn:hover { background: rgba(255,255,255,0.6); }
.tab-btn.active {
    background: var(--surface);
    color: var(--primary);
    box-shadow: 0 1px 6px rgba(124,58,237,0.15);
}

/* ── Card ── */
.card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(124,58,237,0.08);
    overflow: hidden;
}

/* ── Tool Panels ── */
.tool-panel { display: none; padding: 28px; }
.tool-panel.active { display: block; animation: fadeUp 0.3s ease both; }

/* ── Upload Zone ── */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 36px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: linear-gradient(135deg, #faf9ff 0%, #f5f3ff 100%);
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}
.upload-zone:hover .material-icons-round,
.upload-zone.dragover .material-icons-round { transform: translateY(-3px); }
.upload-zone .material-icons-round {
    font-size: 40px;
    color: var(--primary);
    margin-bottom: 10px;
    transition: transform 0.2s;
    display: block;
}
.upload-zone h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.upload-zone p  { font-size: 0.8rem; color: var(--text-muted); }
.upload-zone input[type="file"] { display: none; }

/* ── Controls ── */
.controls { margin-top: 20px; }
.hidden { display: none !important; }

.file-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: #f8f7ff;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    margin-bottom: 18px;
    font-size: 0.875rem;
    font-weight: 500;
}
.file-info .material-icons-round { color: var(--primary); font-size: 18px; }
.file-info .badge {
    margin-left: auto;
    font-family: 'DM Mono', monospace;
    font-size: 0.75rem;
    background: var(--primary-light);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 100px;
    font-weight: 500;
}

/* ── Slider ── */
.slider-container { margin-bottom: 18px; }
.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.slider-header label { font-size: 0.875rem; font-weight: 600; }
.quality-val {
    font-family: 'DM Mono', monospace;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-light);
    padding: 2px 10px;
    border-radius: 100px;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    appearance: none;
    border-radius: 10px;
    outline: none;
    cursor: pointer;
    background: linear-gradient(to right, var(--primary) 0%, var(--primary) 70%, #e0d9f7 70%, #e0d9f7 100%);
    margin-bottom: 8px;
}
input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 2px 6px rgba(124,58,237,0.4);
    transition: transform 0.15s, box-shadow 0.15s;
}
input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 3px 10px rgba(124,58,237,0.5);
}
.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* ── Live Preview ── */
.live-preview {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: linear-gradient(135deg, #f5f3ff, #ede9fe);
    border-radius: var(--radius-sm);
    border: 1px solid #ddd6fe;
    margin-bottom: 18px;
}
.live-preview .material-icons-round { color: var(--primary); font-size: 20px; flex-shrink: 0; }
.preview-label { font-size: 0.72rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 2px; }
.preview-sizes { display: flex; align-items: center; gap: 8px; font-family: 'DM Mono', monospace; font-size: 0.9rem; }
.preview-original { color: var(--text-muted); }
.preview-arrow { color: var(--text-muted); font-size: 0.75rem; }
.preview-estimated { color: var(--primary); font-weight: 500; }
.preview-saving {
    margin-left: auto;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--success);
    background: var(--success-light);
    padding: 3px 10px;
    border-radius: 100px;
    flex-shrink: 0;
    font-family: 'DM Mono', monospace;
}

/* ── Buttons ── */
.btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}
.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
    background-size: 600px 100%;
    animation: shimmer 2.5s linear infinite;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(124,58,237,0.35); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn .material-icons-round { font-size: 20px; }

.btn-text {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    cursor: pointer;
    width: 100%;
    margin-top: 10px;
    padding: 6px;
    transition: color 0.15s;
}
.btn-text:hover { color: var(--primary); }

/* ── Results ── */
.results { animation: pop-in 0.4s cubic-bezier(0.34,1.56,0.64,1) both; }
.success-box { text-align: center; padding: 8px 0; }
.success-icon-wrap {
    display: inline-flex;
    width: 64px; height: 64px;
    border-radius: 50%;
    background: var(--success-light);
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}
.success-icon {
    font-size: 32px;
    color: var(--success);
    animation: check-bounce 0.5s cubic-bezier(0.34,1.56,0.64,1) both;
}
.success-box h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.success-box .sub { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 20px; }

.stats {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 20px;
}
.stat-box {
    background: #f8f7ff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 18px;
    text-align: center;
    flex: 1;
}
.stat-box.highlight { background: var(--success-light); border-color: #a7f3d0; }
.stat-label { font-size: 0.72rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; display: block; margin-bottom: 3px; }
.stat-value { font-family: 'DM Mono', monospace; font-size: 1rem; font-weight: 500; color: var(--text-main); }
.stat-savings { display: block; font-size: 0.75rem; color: var(--success); font-weight: 700; margin-top: 2px; }

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 13px;
    background: linear-gradient(135deg, var(--success), #1a7a35);
    color: white;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s;
    margin-bottom: 4px;
}
.download-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(30,142,62,0.35); }
.download-btn .material-icons-round { font-size: 20px; }

/* ── Password Fields ── */
.input-group { margin-bottom: 16px; }
.input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-main);
}
.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.input-wrap input {
    width: 100%;
    padding: 11px 44px 11px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.9rem;
    background: #faf9ff;
    color: var(--text-main);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.input-wrap input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}
.toggle-pw {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    padding: 0;
    transition: color 0.15s;
}
.toggle-pw:hover { color: var(--primary); }
.toggle-pw .material-icons-round { font-size: 18px; }

/* ── Lock/Unlock Toggle ── */
.mode-toggle {
    display: flex;
    background: #f5f3ff;
    border-radius: var(--radius-sm);
    padding: 4px;
    gap: 4px;
    margin-bottom: 20px;
}
.mode-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px;
    border-radius: 9px;
    border: none;
    background: transparent;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-muted);
}
.mode-btn .material-icons-round { font-size: 16px; }
.mode-btn.active {
    background: white;
    color: var(--primary);
    box-shadow: 0 1px 6px rgba(124,58,237,0.15);
}

/* ── Merge Queue ── */
.merge-queue {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}
.queue-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: #f8f7ff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: grab;
    transition: all 0.15s;
    user-select: none;
}
.queue-item:active { cursor: grabbing; }
.queue-item.dragging { opacity: 0.5; transform: scale(0.98); }
.queue-item.drag-over { border-color: var(--primary); background: var(--primary-light); }
.queue-item .material-icons-round.drag-handle { color: var(--border); font-size: 18px; flex-shrink: 0; }
.queue-item .material-icons-round.pdf-icon { color: var(--primary); font-size: 18px; flex-shrink: 0; }
.queue-name { flex: 1; font-size: 0.85rem; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.queue-size { font-family: 'DM Mono', monospace; font-size: 0.72rem; color: var(--text-muted); flex-shrink: 0; }
.queue-remove {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 2px;
    display: flex;
    border-radius: 6px;
    transition: all 0.15s;
    flex-shrink: 0;
}
.queue-remove:hover { color: var(--danger); background: var(--danger-light); }
.queue-remove .material-icons-round { font-size: 16px; }

.add-more-btn {
    width: 100%;
    padding: 10px;
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.15s;
    margin-bottom: 16px;
}
.add-more-btn .material-icons-round { font-size: 18px; }
.add-more-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* ── Progress Bar ── */
.progress-wrap { margin-bottom: 16px; }
.progress-label { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 6px; font-weight: 500; }
.progress-bar-track { height: 8px; background: var(--border); border-radius: 10px; overflow: hidden; }
.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #a78bfa);
    border-radius: 10px;
    transition: width 0.3s ease;
    width: 0%;
}

/* ── Info Note ── */
.info-note {
    display: flex;
    gap: 8px;
    padding: 10px 14px;
    background: #faf9ff;
    border: 1px solid #ddd6fe;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}
.info-note .material-icons-round { font-size: 16px; color: var(--primary); flex-shrink: 0; margin-top: 1px; }

/* ── Error State ── */
.error-box {
    display: flex;
    gap: 8px;
    padding: 12px 14px;
    background: var(--danger-light);
    border: 1px solid #fca5a5;
    border-radius: var(--radius-sm);
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--danger);
    font-weight: 500;
    animation: fadeUp 0.3s ease both;
}
.error-box .material-icons-round { font-size: 18px; flex-shrink: 0; }

/* ── Footer ── */
.footer {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 6px;
    animation: fadeUp 0.5s ease 0.15s both;
}
.footer a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: color 0.15s;
}
.footer a:hover { color: var(--primary); }
.github-icon { width: 14px; height: 14px; fill: currentColor; }
.sep { margin: 0 6px; opacity: 0.4; }

/* ── Responsive ── */
@media (max-width: 480px) {
    .tab-btn span.tab-label { display: none; }
    .tab-btn { padding: 10px; }
}