:root {
  --bg: #0b1220;
  --bg-2: #0d1528;
  --panel: rgba(16, 24, 40, 0.72);
  --panel-solid: #101828;
  --card: rgba(17, 24, 39, 0.7);
  --border: rgba(148, 163, 184, 0.16);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #22d3ee; /* cyan */
  --primary-2: #06b6d4;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --shadow: 0 10px 30px rgba(2, 8, 23, 0.6);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --ring: 0 0 0 2px rgba(34, 211, 238, 0.35), 0 0 0 6px rgba(34, 211, 238, 0.15);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background */
.bg {
  position: fixed; inset: 0; overflow: hidden; z-index: -1;
}
.bg-gradient {
  position: absolute; inset: -20%;
  background:
    radial-gradient(60% 60% at 10% 10%, rgba(34,211,238,0.12) 0%, transparent 60%),
    radial-gradient(40% 40% at 90% 20%, rgba(59,130,246,0.12) 0%, transparent 60%),
    radial-gradient(50% 50% at 50% 100%, rgba(16,185,129,0.1) 0%, transparent 60%);
  filter: blur(40px);
  animation: bgShift 20s ease-in-out infinite alternate;
}
@keyframes bgShift {
  0% { transform: translateY(-2%) scale(1); }
  100% { transform: translateY(2%) scale(1.04); }
}
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(148,163,184,0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148,163,184,0.08) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px;
  mask-image: radial-gradient(ellipse at center, #000 60%, transparent 100%);
  animation: gridPan 30s linear infinite;
}
@keyframes gridPan {
  from { background-position: 0 0, 0 0; }
  to { background-position: 40px 40px, 40px 40px; }
}

/* Layout */
.shell {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.container {
  width: 100%;
  max-width: 980px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: saturate(140%) blur(12px);
  padding: 28px;
}
.glass-card[data-animate] {
  opacity: 0; transform: translateY(8px);
  animation: fadeInUp 600ms ease forwards;
}
[data-animate].hidden { opacity: 0 !important; transform: none; animation: none !important; }
@keyframes fadeInUp {
  0% { opacity: 0; transform: translateY(10px) scale(.98); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}
.panel {
  background: linear-gradient(180deg, rgba(15,23,42,0.6), rgba(15,23,42,0.35));
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
}

/* Header */
.app-header { text-align: center; margin-bottom: 16px; }
.brand {
  display: flex; align-items: center; justify-content: center; gap: 12px;
}
.brand-mark {
  position: relative; width: 36px; height: 36px;
  background: radial-gradient(circle at 30% 30%, var(--primary), transparent 60%),
              radial-gradient(circle at 70% 70%, #60a5fa, transparent 60%);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: inset 0 0 20px rgba(34,211,238,0.15), 0 10px 20px rgba(2,8,23,0.6);
  overflow: visible;
}
.brand-mark .dot {
  position: absolute; width: 6px; height: 6px; border-radius: 50%;
  background: var(--text); opacity: .7; filter: blur(.3px);
}
.dot-1 { top: 6px; left: 6px; animation: float 3.6s ease-in-out infinite; }
.dot-2 { bottom: 8px; right: 8px; animation: float 3.2s 250ms ease-in-out infinite; }
.dot-3 { top: 8px; right: 6px; animation: float 3.8s 400ms ease-in-out infinite; }
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
.title {
  margin: 0;
  font-size: clamp(28px, 3.8vw, 40px);
  letter-spacing: -.02em;
}
.text-gradient {
  background: linear-gradient(90deg, #e2e8f0 0%, var(--primary) 50%, #60a5fa 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.subtitle {
  margin: 8px auto 0;
  color: var(--muted);
  max-width: 48ch;
}

/* Tabs */
.tabs {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: rgba(148,163,184,0.08);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px;
  margin: 18px 0 12px;
}
.tab-btn {
  position: relative;
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: color .2s ease;
  z-index: 1;
}
.tab-btn.active { color: var(--text); }
.tab-indicator {
  position: absolute; top: 6px; bottom: 6px; width: calc(50% - 6px);
  background: linear-gradient(180deg, rgba(34,211,238,0.16), rgba(59,130,246,0.12));
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04), 0 6px 18px rgba(2,8,23,0.6);
  transition: transform .35s cubic-bezier(.2,.8,.2,1);
  transform: translateX(0);
}
.tab-btn.active ~ .tab-indicator { transform: translateX(0); }
#select-github-btn.tab-btn.active ~ .tab-indicator { transform: translateX(100%); }

/* Form */
.form { display: grid; gap: 12px; }
.form-row { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 700px){ .form-row { grid-template-columns: 1fr 1fr; } }

.form-group { display: grid; gap: 8px; }
label { font-weight: 600; color: var(--text); }
small { color: var(--muted); }

input[type="text"],
input[type="file"],
select,
textarea {
  width: 100%;
  padding: 12px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  background: linear-gradient(180deg, rgba(14,22,38,0.9), rgba(14,22,38,0.6));
  outline: none;
  transition: box-shadow .2s ease, border-color .2s ease, transform .08s ease;
}
textarea { resize: vertical; min-height: 92px; }
input:focus, select:focus, textarea:focus {
  border-color: rgba(34,211,238,0.55);
  box-shadow: var(--ring);
}

select{background: var(--bg);}
option {color: var(--primary); background-color: var(--bg-2);}

.form-error { color: var(--danger); font-weight: 600; }

/* Tree */
.tree {
  background: linear-gradient(180deg, rgba(14,22,38,0.9), rgba(14,22,38,0.5));
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  max-height: 320px;
  overflow: auto;
}
#file-tree ul { list-style: none; padding-left: 1rem; margin: 6px 0; }
#file-tree label { font-weight: 500; }

/* Divider */
.divider {
  height: 1px; width: 100%;
  background: linear-gradient(90deg, transparent, rgba(148,163,184,0.2), transparent);
  margin: 6px 0;
}

/* Buttons */
.btn {
  --inset: inset 0 0 0 1px rgba(255,255,255,0.06);
  display: inline-flex; align-items: center; justify-content: center;
  gap: 10px;
  border: none;
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(180deg, #0ea5b7, #0891a6);
  color: white;
  box-shadow: var(--inset), 0 8px 24px rgba(6, 182, 212, 0.25);
  transition: transform .08s ease, box-shadow .2s ease, filter .2s ease;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
.btn:active { transform: translateY(0); filter: brightness(.98); }
.btn:disabled { opacity: .6; cursor: not-allowed; filter: grayscale(.2); }
.btn-primary { background: linear-gradient(180deg, var(--primary), var(--primary-2)); }
.btn-inner { display: inline-flex; align-items: center; gap: 10px; }
.icon { opacity: .9; }

/* Button glow + ripple */
.btn-glow { position: relative; overflow: hidden; }
.btn-glow::after {
  content: ""; position: absolute; inset: -2px;
  background: radial-gradient(120px 120px at var(--x,50%) var(--y,50%), rgba(255,255,255,0.18), transparent 40%);
  transition: opacity .2s ease;
  opacity: 0; pointer-events: none;
}
.btn-glow:hover::after { opacity: 1; }
.ripple {
  position: absolute; border-radius: 50%; transform: translate(-50%, -50%);
  background: rgba(255,255,255,0.35);
  animation: ripple .6s ease-out forwards;
  pointer-events: none;
}
@keyframes ripple {
  from { width: 0; height: 0; opacity: .45; }
  to { width: 360px; height: 360px; opacity: 0; }
}

/* Loader dot */
.loader {
  width: 0.85em; height: 0.85em; border-radius: 50%;
  background: currentColor; opacity: 0; transform: scale(.6);
  box-shadow: 16px 0 0 currentColor, -16px 0 0 currentColor;
  filter: drop-shadow(0 0 8px rgba(34,211,238,0.5));
}
button[disabled] .loader { opacity: .9; animation: pulseDots 1s infinite ease-in-out; }
@keyframes pulseDots {
  0%, 100% { box-shadow: 16px 0 0 currentColor, -16px 0 0 currentColor; }
  50% { box-shadow: 0 0 0 currentColor, 0 0 0 currentColor; }
}

/* Actions */
.form-actions { display: flex; justify-content: center; margin-top: 8px; }

/* Progress Layout */
.section-title { margin: 0 0 10px; }
.section-title.success { color: var(--success); }

.progress-layout {
  display: grid; gap: 16px;
}
@media (min-width: 960px){
  .progress-layout { grid-template-columns: 1.1fr .9fr; align-items: start; }
}

/* Timeline */
.timeline {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 12px;
}
.phase-item {
  display: grid; grid-template-columns: 28px 1fr; gap: 12px;
  background: linear-gradient(180deg, rgba(15,23,42,0.6), rgba(15,23,42,0.35));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  transition: transform .2s ease, border-color .2s ease, background .3s ease, box-shadow .3s ease;
  will-change: transform;
}
.phase-item:hover { transform: translateY(-2px); border-color: rgba(34,211,238,0.35); box-shadow: 0 8px 20px rgba(2,8,23,0.6); }
.phase-title { font-weight: 700; }

.status-icon {
  position: relative; width: 24px; height: 24px; border-radius: 50%;
  background: #334155; align-self: start;
  box-shadow: inset 0 0 0 2px rgba(15,23,42,0.7);
}
.phase-item[data-status="pending"] .status-icon { background: #475569; opacity: .8; }
.phase-item[data-status="in-progress"] .status-icon {
  background: linear-gradient(180deg, #60a5fa, #3b82f6);
  animation: spin 1.2s linear infinite;
  box-shadow: 0 0 0 6px rgba(59,130,246,0.15);
}
.phase-item[data-status="success"] .status-icon {
  background: linear-gradient(180deg, #34d399, #22c55e);
  box-shadow: 0 0 0 6px rgba(34,197,94,0.12);
}
.phase-item[data-status="error"] .status-icon {
  background: linear-gradient(180deg, #f97373, #ef4444);
  box-shadow: 0 0 0 6px rgba(239,68,68,0.15);
}

.phase-item[data-status="success"] .status-icon::after,
.phase-item[data-status="error"] .status-icon::after {
  position: absolute; content: "";
  inset: 5px; border-radius: 50%; background: rgba(0,0,0,0.2);
  mask: center / contain no-repeat;
}
.phase-item[data-status="success"] .status-icon::after {
  mask-image: radial-gradient(circle at 50% 58%, transparent 56%, black 56.5%),
              linear-gradient(transparent 45%, black 45% 55%, transparent 55%);
}
.phase-item[data-status="error"] .status-icon::after {
  mask-image: linear-gradient(transparent 45%, black 45% 55%, transparent 55%),
              linear-gradient(90deg, transparent 45%, black 45% 55%, transparent 55%);
}

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

.subtask-list { list-style: none; padding-left: 0; margin: 8px 0 0; font-size: 14px; color: var(--muted); }
.subtask-list li { margin: 4px 0; opacity: .8; transition: opacity .2s ease, color .2s ease, text-decoration-color .2s ease; }
.subtask-list li[data-status="in-progress"] { opacity: 1; color: #cbd5e1; }
.subtask-list li[data-status="success"] { opacity: 1; color: #93a3b3; text-decoration: line-through; }
.subtask-list li[data-status="error"] { opacity: 1; color: var(--danger); font-weight: 600; }

/* Terminal */
.terminal {
  background: #0b1020;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.03);
}
.terminal-head {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.terminal-head h4 { margin: 0 0 0 auto; color: var(--muted); font-weight: 600; }
.terminal .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.terminal .dot.red { background: #ef4444; }
.terminal .dot.yellow { background: #f59e0b; }
.terminal .dot.green { background: #22c55e; }

.terminal-body {
  margin: 0; padding: 14px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 13px; color: #cbd5e1; white-space: pre-wrap; word-wrap: break-word;
  max-height: 420px; overflow: auto; line-height: 1.45;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 50%, transparent 50%);
  background-size: 100% 22px;
}

/* Result */
.result-card {
  background: linear-gradient(180deg, rgba(16,185,129,0.1), rgba(16,185,129,0.06));
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: 12px;
  padding: 14px;
}
.button-link {
  display: inline-flex; align-items: center; gap: 8px;
  text-decoration: none; color: white;
  margin-top: 10px;
  background: linear-gradient(180deg, var(--primary), var(--primary-2));
  padding: 10px 14px; border-radius: 10px; font-weight: 700;
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.25);
}

/* Utility */
.hidden { display: none !important; }

/* Accessibility: reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}