:root {
  color-scheme: dark;
  --bg: #0a0b0e;
  --bg-subtle: #0f1117;
  --surface: #13161f;
  --surface-hover: #181c27;
  --surface-card: #151821;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f0f3fa;
  --text-muted: #858d9f;
  --accent: #ff5e1a;
  --accent-hover: #ff7438;
  --accent-glow: rgba(255, 94, 26, 0.22);
  --success: #00e599;
  --success-bg: rgba(0, 229, 153, 0.12);
  --danger: #ff4d6d;
  --danger-bg: rgba(255, 77, 109, 0.12);
  --font-main: "Inter", "Microsoft YaHei UI", "PingFang SC", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f6f9;
  --bg-subtle: #ffffff;
  --surface: #ffffff;
  --surface-hover: #f0f2f5;
  --surface-card: #ffffff;
  --border: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.18);
  --text: #16191f;
  --text-muted: #545b64;
  --accent: #0972d3;
  --accent-hover: #033160;
  --accent-glow: rgba(9, 114, 211, 0.2);
  --success: #037f4c;
  --success-bg: rgba(3, 127, 76, 0.1);
  --danger: #d13212;
  --danger-bg: rgba(209, 50, 18, 0.1);
}

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

body {
  min-height: 100vh;
  font-family: var(--font-main);
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 50% 0%, rgba(255, 94, 26, 0.06), transparent 45vw),
    radial-gradient(circle at 90% 90%, rgba(0, 229, 153, 0.03), transparent 35vw),
    radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 28px 28px;
  background-position: 0 0, 0 0, -14px -14px;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

button, input {
  font: inherit;
  outline: none;
}

/* Layout */
.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
  padding: 0 min(48px, 5vw);
  border-bottom: 1px solid var(--border);
  background: rgba(10, 11, 14, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--surface), #1e2330);
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  color: var(--accent);
}

.brand-name {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #ffffff;
}

.topbar-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.pulse-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 10px var(--success);
}

.status-text {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.workspace {
  width: min(1040px, calc(100% - 40px));
  margin: 40px auto 60px;
  flex: 1;
}

/* Intro Section */
.intro-header {
  margin-bottom: 32px;
}

.title-wrap h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 12px;
}

.subtitle {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.7;
}

/* Workstation Card */
.workstation-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  margin-bottom: 36px;
}

.drop-surface {
  padding: 54px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.drop-surface:hover,
.drop-surface.dragging {
  background: var(--surface-hover);
}

.drop-surface.dragging {
  border-color: var(--accent);
}

.drop-visual {
  position: relative;
  width: 88px;
  height: 88px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
}

.visual-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.ring-outer {
  width: 100%;
  height: 100%;
}

.ring-inner {
  width: 72%;
  height: 72%;
  border-color: rgba(255, 94, 26, 0.3);
}

.drop-surface:hover .ring-outer {
  transform: scale(1.08);
  border-color: rgba(255, 94, 26, 0.4);
}

.drop-surface:hover .ring-inner {
  transform: scale(0.92);
  background: rgba(255, 94, 26, 0.05);
}

.visual-icon {
  z-index: 2;
  color: var(--accent);
  transition: transform 0.25s ease;
}

.drop-surface:hover .visual-icon {
  transform: translateY(-3px);
}

.drop-copy h2 {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.drop-copy p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(255, 94, 26, 0.35);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-strong);
}

/* Ribbon */
.control-ribbon {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 16px 28px;
  background: rgba(0, 0, 0, 0.25);
  border-top: 1px solid var(--border);
}

.ribbon-right {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.custom-toggle {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.toggle-track {
  width: 40px;
  height: 22px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 99px;
  position: relative;
  transition: background 0.25s ease;
}

.toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffffff;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

input[type="checkbox"]:checked + .toggle-track {
  background: var(--success);
}

input[type="checkbox"]:checked + .toggle-track .toggle-knob {
  transform: translateX(18px);
}

.toggle-text {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
}

.format-input-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.field-label {
  font-size: 13px;
  color: var(--text-muted);
}

.input-wrapper input {
  width: 90px;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.3);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: center;
  transition: border-color 0.2s ease;
}

.input-wrapper input:focus {
  border-color: var(--accent);
}

/* Queue Section */
.queue-panel {
  margin-bottom: 40px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding: 0 4px;
}

.header-main h3 {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
}

.status-pill {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 99px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 600;
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Result Cards */
.result-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: border-color 0.2s ease;
}

.result-card:hover {
  border-color: var(--border-strong);
}

.result-card.ok {
  border-color: rgba(0, 229, 153, 0.25);
  background: linear-gradient(90deg, rgba(0, 229, 153, 0.04), transparent 40%), var(--surface-card);
}

.result-card.bad {
  border-color: rgba(255, 77, 109, 0.25);
  background: linear-gradient(90deg, rgba(255, 77, 109, 0.04), transparent 40%), var(--surface-card);
}

.result-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  display: grid;
  place-items: center;
  color: var(--text-muted);
  flex-shrink: 0;
}

.result-card.ok .result-icon {
  color: var(--success);
  background: var(--success-bg);
}

.result-card.bad .result-icon {
  color: var(--danger);
  background: var(--danger-bg);
}

.result-info {
  flex: 1;
  min-width: 0;
}

.result-info .name {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-info .meta {
  font-size: 12px;
  color: var(--text-muted);
}

.result-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

.badge.ok {
  color: var(--success);
  background: var(--success-bg);
}

.badge.bad {
  color: var(--danger);
  background: var(--danger-bg);
}

.badge.running {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  background: var(--text);
  color: var(--bg);
  transition: all 0.2s ease;
}

.download-btn:hover {
  background: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

/* Theme Switcher Button */
.theme-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  background: var(--surface-card);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}
.theme-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* AWS Cloudscape / IBM Carbon Actionable Announcement Modal */
.ann-backdrop {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.ann-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}
.ann-modal {
  width: min(540px, 100%);
  background: var(--surface-card);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
  overflow: hidden;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}
.ann-backdrop.show .ann-modal {
  transform: translateY(0) scale(1);
}
.ann-modal::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--success));
}
.ann-header {
  padding: 24px 28px 16px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.ann-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(255,94,26,0.3);
}
.ann-close-x {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: all 0.2s;
}
.ann-close-x:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}
.ann-content {
  padding: 0 28px 24px;
}
.ann-content h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--text);
  margin-top: 12px;
  margin-bottom: 12px;
  line-height: 1.35;
}
.ann-content .ann-body {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
.ann-actions {
  padding: 16px 28px;
  background: rgba(0, 0, 0, 0.15);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}
.ann-btn {
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.ann-btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.ann-btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}
.ann-btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.ann-btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--accent);
  color: var(--accent);
}

/* Bottom Bar */
.bottombar {
  text-align: center;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  margin-top: auto;
}

@media (max-width: 768px) {
  .topbar { padding: 0 20px; }
  .control-ribbon { flex-direction: column; align-items: stretch; }
  .ribbon-right { justify-content: space-between; }
  .result-card { flex-direction: column; align-items: flex-start; }
  .result-actions { width: 100%; justify-content: space-between; margin-top: 8px; }
}