/* ═══════════════════════════════════════════════════════
   STEALTHVAULT — styles.css
   Dark minimal. No external dependencies.
═══════════════════════════════════════════════════════ */

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

:root {
  --bg:       #080c14;
  --surface:  #0e1628;
  --surface2: #121e36;
  --surface3: #172540;
  --border:   #1a2e50;
  --border2:  #2a4e80;
  --accent:   #00c8ff;
  --accent2:  #0090cc;
  --adim:     rgba(0,200,255,0.08);
  --aglow:    rgba(0,200,255,0.18);
  --purple:   #7b2fff;
  --text:     #d0e8f5;
  --text2:    #5a8aaa;
  --text3:    #2a4060;
  --success:  #00e896;
  --error:    #ff3a6e;
  --warn:     #ffaa00;
  --font:     -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono:     'Consolas', 'Courier New', monospace;
  --r:        10px;
  --t:        0.18s ease;
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg); color: var(--text);
  font-family: var(--font); min-height: 100vh;
  overflow-x: hidden; font-size: 15px; line-height: 1.6;
}

/* ── Ambient background ── */
.grid-bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,200,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
}
.orb1 {
  position: fixed; top: -250px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 500px; pointer-events: none; z-index: 0;
  background: radial-gradient(ellipse, rgba(0,120,255,0.09) 0%, transparent 70%);
}
.orb2 {
  position: fixed; bottom: -150px; right: -200px;
  width: 600px; height: 600px; pointer-events: none; z-index: 0;
  background: radial-gradient(ellipse, rgba(123,47,255,0.07) 0%, transparent 70%);
}

/* ── Layout ── */
.wrap { position: relative; z-index: 1; max-width: 920px; margin: 0 auto; padding: 0 24px; }

/* ══ NAV ══ */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,12,20,0.94); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; }
.logo { font-size: 15px; font-weight: 700; letter-spacing: 0.15em; color: var(--text); }
.logo span { color: var(--accent); }
.nav-tabs { display: flex; gap: 4px; background: var(--surface); border-radius: 8px; padding: 4px; border: 1px solid var(--border); }
.tab-btn {
  padding: 7px 18px; border-radius: 6px; border: none;
  background: transparent; color: var(--text2); cursor: pointer;
  font-size: 13px; font-weight: 600; letter-spacing: 0.04em; transition: all var(--t);
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { background: var(--adim); color: var(--accent); border: 1px solid var(--border2); }
.worker-badge {
  font-size: 10px; color: var(--text3); font-family: var(--mono);
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 5px; padding: 3px 10px;
}

/* ══ TAB CONTENT ══ */
.tab-content { display: none; padding: 48px 0 80px; }
.tab-content.active { display: block; }

/* ══ HERO ══ */
.hero { text-align: center; margin-bottom: 36px; }
.badge {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 0.12em;
  color: var(--accent); border: 1px solid var(--border2); border-radius: 20px;
  padding: 4px 14px; margin-bottom: 16px;
}
.hero h1 { font-size: 2.4rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 10px; }
.hero-sub { color: var(--text2); font-size: 15px; max-width: 540px; margin: 0 auto; }

/* ══ CARD ══ */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 36px; margin-bottom: 24px;
}

/* ══ STEPS ══ */
.step {
  display: grid; grid-template-columns: 48px 1fr; gap: 24px;
  padding: 28px 0; border-bottom: 1px solid var(--border);
}
.step:last-of-type { border-bottom: none; }
.step-num {
  font-size: 11px; font-weight: 800; letter-spacing: 0.1em; color: var(--accent2);
  font-family: var(--mono); padding-top: 4px;
}
.step-body h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.step-body p  { color: var(--text2); font-size: 13px; margin-bottom: 14px; }

/* ══ BUTTONS ══ */
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.btn-primary {
  padding: 9px 18px; border-radius: 8px; border: 1px solid var(--border2);
  background: var(--surface2); color: var(--text); cursor: pointer;
  font-size: 13px; font-weight: 600; transition: all var(--t);
}
.btn-primary:hover { border-color: var(--accent2); color: var(--accent); background: var(--adim); }
.btn-ghost {
  padding: 9px 18px; border-radius: 8px; border: 1px solid var(--border);
  background: transparent; color: var(--text2); cursor: pointer;
  font-size: 13px; transition: all var(--t);
}
.btn-ghost:hover { border-color: var(--error); color: var(--error); }
.btn-icon {
  padding: 0 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface3); color: var(--text2); cursor: pointer;
  font-size: 14px; transition: all var(--t);
}
.btn-icon:hover { border-color: var(--accent2); color: var(--accent); }
.btn-action {
  padding: 13px 34px; border-radius: 10px; cursor: pointer; font-size: 15px;
  font-weight: 700; letter-spacing: 0.04em; border: none;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: #fff; transition: opacity var(--t); box-shadow: 0 0 24px var(--aglow);
}
.btn-action:hover { opacity: 0.88; }
.btn-action:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-lock {
  padding: 7px 16px; border-radius: 8px; border: 1px solid rgba(255,58,110,0.3);
  background: rgba(255,58,110,0.06); color: var(--error); cursor: pointer;
  font-size: 13px; font-weight: 600; transition: all var(--t);
}
.btn-lock:hover { background: rgba(255,58,110,0.12); }

/* ══ INPUTS ══ */
.input-text {
  width: 100%; padding: 11px 14px; border-radius: 8px; border: 1px solid var(--border2);
  background: var(--surface3); color: var(--text); font-size: 14px;
  transition: border-color var(--t); font-family: var(--font);
}
.input-text:focus { outline: none; border-color: var(--accent2); box-shadow: 0 0 0 3px var(--adim); }
.password-wrap { display: flex; gap: 8px; align-items: stretch; }
.password-wrap .input-text { flex: 1; }

/* ══ FILE LIST ══ */
.file-list { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; max-height: 240px; overflow-y: auto; }
.file-item {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px;
  background: var(--surface3); border: 1px solid var(--border); border-radius: 8px;
  font-size: 13px;
}
.file-icon { flex-shrink: 0; font-size: 16px; }
.file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-size { color: var(--text2); font-size: 11px; font-family: var(--mono); flex-shrink: 0; }
.file-remove {
  background: none; border: none; color: var(--text3); cursor: pointer;
  font-size: 16px; padding: 0 4px; flex-shrink: 0; transition: color var(--t);
}
.file-remove:hover { color: var(--error); }
.file-summary { margin-top: 8px; font-size: 12px; color: var(--text2); font-family: var(--mono); }
.file-summary.ok { color: var(--success); }

/* ══ FOLDER STATUS ══ */
.folder-status { margin-top: 10px; font-size: 13px; color: var(--text2); }
.folder-status.loaded { color: var(--success); }

/* ══ DUMMY PREVIEW ══ */
.dummy-preview { margin-top: 12px; max-width: 220px; border-radius: var(--r); overflow: hidden; }
.dummy-preview img { width: 100%; display: block; }

/* ══ MODE CARDS ══ */
.mode-cards { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin-top: 10px; }
.mode-card {
  padding: 18px 16px; border-radius: 10px; border: 2px solid var(--border);
  background: var(--surface2); cursor: pointer; transition: all var(--t);
  user-select: none; display: block;
}
.mode-card:hover { border-color: var(--border2); }
.mode-card.active { border-color: var(--accent2); background: var(--adim); }
.mode-icon { font-size: 22px; margin-bottom: 8px; }
.mode-label { font-size: 13px; font-weight: 700; margin-bottom: 6px; }
.mode-desc { font-size: 12px; color: var(--text2); }

/* ══ OUTPUT NAMES LIST ══ */
.section-divider {
  font-size: 11px; font-weight: 700; letter-spacing: 0.1em; color: var(--text3);
  text-transform: uppercase; margin: 24px 0 14px; padding-top: 24px;
  border-top: 1px solid var(--border);
}
.section-hint { font-weight: 400; text-transform: none; letter-spacing: 0; }
.output-names-list { display: flex; flex-direction: column; gap: 8px; }
.output-name-row {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px;
  align-items: center; font-size: 13px;
}
.orig-name { color: var(--text2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.arrow { color: var(--accent); font-size: 16px; flex-shrink: 0; }
.out-name-input {
  padding: 7px 10px; border-radius: 7px; border: 1px solid var(--border);
  background: var(--surface3); color: var(--text); font-size: 13px; font-family: var(--mono);
}
.out-name-input:focus { outline: none; border-color: var(--accent2); }

/* ══ PROGRESS ══ */
.action-row { margin: 28px 0 0; display: flex; justify-content: center; }
.progress-area { margin-top: 24px; }
.progress-bar-wrap {
  width: 100%; height: 6px; background: var(--surface3); border-radius: 3px;
  overflow: hidden; margin-bottom: 8px;
}
.progress-bar { height: 100%; width: 0%; border-radius: 3px; transition: width 0.25s linear;
  background: linear-gradient(90deg, var(--accent), var(--purple)); }
.progress-label { font-size: 12px; color: var(--text2); font-family: var(--mono); }
.stitch-results { margin-top: 14px; display: flex; flex-direction: column; gap: 6px; }
.stitch-result-item { font-size: 13px; padding: 8px 12px; border-radius: 7px; }
.stitch-result-item.ok  { background: rgba(0,232,150,0.08); color: var(--success); }
.stitch-result-item.err { background: rgba(255,58,110,0.08); color: var(--error); }

/* ══ ERROR & UTILITY ══ */
.error-msg {
  margin-top: 12px; padding: 12px 16px; border-radius: 8px;
  background: rgba(255,58,110,0.08); color: var(--error);
  border: 1px solid rgba(255,58,110,0.2); font-size: 13px;
}
.hidden { display: none !important; }

/* ══ CHANGE PASSWORD — 3 pw boxes ══ */
.pw-triple { display: flex; flex-direction: column; gap: 14px; }
.pw-triple-item label { display: block; font-size: 12px; color: var(--text2); margin-bottom: 6px; font-weight: 600; }

/* ══ GALLERY ══ */
.gallery-toolbar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-bottom: 20px; padding: 14px 18px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
}
.gallery-info { display: flex; align-items: center; gap: 14px; flex: 1; }
#gallery-count { font-size: 13px; color: var(--text2); font-family: var(--mono); white-space: nowrap; }
.search-box {
  flex: 1; padding: 8px 12px; border-radius: 8px; border: 1px solid var(--border2);
  background: var(--surface3); color: var(--text); font-size: 13px;
  min-width: 160px;
}
.search-box:focus { outline: none; border-color: var(--accent2); }
.view-toggle { display: flex; gap: 4px; }
.view-btn {
  width: 32px; height: 32px; border-radius: 7px; border: 1px solid var(--border);
  background: var(--surface2); color: var(--text2); cursor: pointer;
  font-size: 14px; transition: all var(--t); display: flex; align-items: center; justify-content: center;
}
.view-btn:hover, .view-btn.active { border-color: var(--accent2); color: var(--accent); background: var(--adim); }

/* ══ FILE GRID / CARDS ══ */
.file-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); gap: 12px; }
.file-grid.list-view { grid-template-columns: 1fr; }

.file-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  cursor: pointer; transition: all var(--t); overflow: hidden; position: relative;
}
.file-card:hover { border-color: var(--border2); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }
.file-card.prefetched { border-color: rgba(0,232,150,0.25); }
.file-card-thumb {
  width: 100%; aspect-ratio: 4/3; background: var(--surface2);
  display: flex; align-items: center; justify-content: center; font-size: 36px;
  overflow: hidden;
}
.file-card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.file-card-type-badge {
  position: absolute; top: 6px; right: 6px; font-size: 9px; font-weight: 800;
  letter-spacing: 0.06em; background: rgba(8,12,20,0.8); color: var(--accent);
  padding: 2px 6px; border-radius: 4px;
}
.file-card-info { padding: 10px 12px 12px; }
.file-card-name {
  font-size: 12px; font-weight: 600; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; margin-bottom: 3px;
}
.file-card-meta { font-size: 11px; color: var(--text2); font-family: var(--mono); }
.file-card.prefetched .file-card-meta { color: var(--success); }

/* list view override */
.file-grid.list-view .file-card { display: flex; align-items: center; gap: 14px; padding: 12px 16px; }
.file-grid.list-view .file-card-thumb { width: 40px; height: 40px; aspect-ratio: 1; font-size: 20px; border-radius: 8px; flex-shrink: 0; }
.file-grid.list-view .file-card-type-badge { display: none; }
.file-grid.list-view .file-card-info { padding: 0; flex: 1; overflow: hidden; }
.file-grid.list-view .file-card-name { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ══ VIEWER MODAL ══ */
.viewer-modal {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
}
.viewer-backdrop {
  position: absolute; inset: 0; background: rgba(4,8,16,0.9); backdrop-filter: blur(8px);
}
.viewer-container {
  position: relative; z-index: 1;
  width: min(96vw, 1100px); max-height: 96vh;
  background: var(--surface); border: 1px solid var(--border2); border-radius: 14px;
  display: flex; flex-direction: column; overflow: hidden;
}

/* Viewer header */
.viewer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.viewer-filename { font-size: 13px; font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viewer-header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.viewer-pos { font-size: 12px; color: var(--text2); font-family: var(--mono); }
.viewer-btn {
  padding: 6px 14px; border-radius: 7px; border: 1px solid var(--border2);
  background: var(--surface2); color: var(--text); cursor: pointer; font-size: 12px;
  transition: all var(--t);
}
.viewer-btn:hover { border-color: var(--accent2); color: var(--accent); }

/* Keyboard hints */
.kbd-hints {
  display: flex; flex-wrap: wrap; gap: 8px; padding: 8px 16px;
  border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.kbd { display: flex; align-items: center; gap: 5px; font-size: 11px; color: var(--text3); }
.key {
  padding: 1px 5px; border-radius: 4px; border: 1px solid var(--border2);
  background: var(--surface2); color: var(--text2); font-family: var(--mono); font-size: 10px;
}

/* Loading overlay — fullscreen inside viewer */
.viewer-loading {
  position: absolute; inset: 0; z-index: 10;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 16px; background: var(--surface);
}
.vl-icon { font-size: 56px; animation: pulse-icon 1.6s ease-in-out infinite; }
@keyframes pulse-icon { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(0.9)} }
.vl-name { font-size: 15px; font-weight: 700; text-align: center; max-width: 80%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vl-progress-wrap { width: min(380px, 80%); }
.vl-progress-wrap .progress-bar-wrap { height: 8px; border-radius: 4px; }
.vl-progress-wrap .progress-label { margin-top: 8px; text-align: center; }

/* Viewer content area */
.viewer-content {
  flex: 1; overflow: auto; display: flex; align-items: center; justify-content: center;
  padding: 12px; min-height: 200px; position: relative;
}
.viewer-content video, .viewer-content img, .viewer-content iframe {
  max-width: 100%; max-height: calc(96vh - 220px); border-radius: 6px;
}
.viewer-content audio { width: 100%; }
.viewer-content pre {
  white-space: pre-wrap; word-break: break-all; font-size: 13px;
  font-family: var(--mono); color: var(--text2); text-align: left;
  width: 100%; max-height: calc(96vh - 220px); overflow-y: auto;
}
.audio-art {
  width: 160px; height: 160px; border-radius: 50%; background: var(--surface2);
  border: 2px solid var(--border2); display: flex; align-items: center;
  justify-content: center; font-size: 56px; margin-bottom: 20px;
}
.audio-art.playing { animation: spin-art 8s linear infinite; }
@keyframes spin-art { to { transform: rotate(360deg); } }
.unsupported-file { text-align: center; padding: 40px; }
.unsupported-file .big-icon { font-size: 64px; margin-bottom: 16px; }
.unsupported-file p { color: var(--text2); margin: 6px 0; }

/* Viewer nav */
.viewer-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-top: 1px solid var(--border); flex-shrink: 0;
}
.viewer-nav-center { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.viewer-nav-info { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.nav-btn {
  padding: 8px 20px; border-radius: 8px; border: 1px solid var(--border2);
  background: var(--surface2); color: var(--text); cursor: pointer; font-size: 13px;
  transition: all var(--t);
}
.nav-btn:hover:not(:disabled) { border-color: var(--accent2); color: var(--accent); }
.nav-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.nav-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--border2);
  cursor: pointer; transition: all var(--t);
}
.nav-dot:hover { background: var(--text2); }
.nav-dot.active { background: var(--accent); transform: scale(1.3); }
.nav-dot.prefetched { background: rgba(0,232,150,0.4); }
.nav-dot.active.prefetched { background: var(--success); }

/* Prefetch status */
.prefetch-status { font-size: 11px; color: var(--text3); font-family: var(--mono); min-height: 14px; }
.prefetch-status.ready { color: var(--success); }

/* ══ TOAST ══ */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--surface2); border: 1px solid var(--border2); border-radius: 8px;
  padding: 12px 22px; font-size: 13px; z-index: 300; transition: opacity var(--t);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.toast.success { border-color: rgba(0,232,150,0.4); color: var(--success); }
.toast.error   { border-color: rgba(255,58,110,0.4); color: var(--error); }

/* ══ SCROLLBAR ══ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ══ RESPONSIVE ══ */
@media (max-width: 640px) {
  .mode-cards { grid-template-columns: 1fr; }
  .output-name-row { grid-template-columns: 1fr; }
  .arrow { display: none; }
  .viewer-container { width: 100vw; max-height: 100vh; border-radius: 0; }
  .nav-inner { flex-wrap: wrap; gap: 10px; }
}