/* ECHO — fresh deck. Light, modern, sectional.
   Palette: cream canvas, ink type, indigo→violet primary, coral alt.
   All selectors preserved for JS bindings. */

:root {
  --echo-font-sans: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --echo-font-display: "Anton", Impact, sans-serif;

  /* Surfaces */
  --echo-page: #f4f1ea;
  --echo-page-tint: #ece7dc;
  --echo-shell-bg: #ffffff;
  --echo-panel-bg: #ffffff;
  --echo-panel-soft: #f8f6f1;
  --echo-panel-deep: #0f1117;
  --echo-panel-line: rgba(15, 17, 23, 0.08);
  --echo-panel-line-strong: rgba(15, 17, 23, 0.16);
  --echo-paper: #fffdf8;
  --echo-paper-deep: #f7f3e8;
  --echo-paper-rule: rgba(15, 17, 23, 0.06);

  /* Type */
  --echo-text: #1b1d24;
  --echo-heading: #0a0c12;
  --echo-muted: #5b6170;
  --echo-dim: #8a8f9c;
  --echo-on-dark: #f3f4f8;
  --echo-on-dark-muted: #b8bcc8;

  /* Accents */
  --echo-accent: #5b5bf5;            /* indigo */
  --echo-accent-strong: #7a4dff;     /* violet */
  --echo-accent-soft: rgba(91, 91, 245, 0.10);
  --echo-accent-ink: #ffffff;
  --echo-coral: #ff6a5b;
  --echo-coral-soft: rgba(255, 106, 91, 0.12);
  --echo-mint: #30c39a;
  --echo-mint-soft: rgba(48, 195, 154, 0.14);

  --echo-link: #4f4cd9;
  --echo-focus: rgba(91, 91, 245, 0.28);
  --echo-danger: #e34a45;
  --echo-ok: #2aa37a;

  /* Shadows + radii */
  --echo-shadow: 0 24px 60px rgba(15, 17, 23, 0.10);
  --echo-shadow-soft: 0 10px 24px rgba(15, 17, 23, 0.06);
  --echo-shadow-pop: 0 16px 36px rgba(91, 91, 245, 0.22);
  --echo-radius-shell: 1.25rem;
  --echo-radius-panel: 0.95rem;
  --echo-radius-control: 0.65rem;

  --echo-shell-width: min(1280px, calc(100% - 1.75rem));
}

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

body.echo-standalone {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: var(--echo-font-sans);
  color: var(--echo-text);
  background:
    radial-gradient(60rem 32rem at 12% -8%, rgba(91, 91, 245, 0.18), transparent 60%),
    radial-gradient(50rem 28rem at 96% 4%, rgba(255, 106, 91, 0.16), transparent 60%),
    linear-gradient(180deg, var(--echo-page) 0%, var(--echo-page-tint) 100%);
  color-scheme: light;
}

body.echo-standalone :where(a, button, input, select, textarea) {
  font: inherit; color: inherit;
}

body.echo-standalone a {
  color: var(--echo-link);
  text-underline-offset: 0.22em;
}

body.echo-standalone strong { color: var(--echo-heading); }
body.echo-standalone ::selection { background: var(--echo-accent-soft); color: var(--echo-heading); }

.echo-shell {
  position: relative;
  z-index: 1;
  width: var(--echo-shell-width);
  margin: 0 auto;
  padding: 1.25rem 0 3rem;
}

/* ======================== Header ======================== */
.echo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--echo-radius-shell);
  background: var(--echo-shell-bg);
  border: 1px solid var(--echo-panel-line);
  box-shadow: var(--echo-shadow-soft);
}

.echo-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
  color: inherit;
}

.echo-brand-stack {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.echo-mark {
  font-family: var(--echo-font-display);
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  line-height: 0.92;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--echo-heading);
  background: linear-gradient(135deg, var(--echo-accent), var(--echo-accent-strong) 70%, var(--echo-coral));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.echo-tagline,
.echo-brand-id,
.echo-nav a,
.echo-eyebrow,
.echo-field-label,
.echo-slider-label,
.echo-slider-value,
.echo-note,
.echo-status,
.echo-progress-label,
.echo-file-meta,
.echo-text-meta,
.echo-profile-copy,
.echo-voice-meta,
.echo-spec-label,
.echo-module-label,
.echo-stage-label,
.echo-stage-topline,
.echo-stage-footer,
.echo-output-rail {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.echo-tagline { color: var(--echo-muted); }

.echo-brand-id {
  display: inline-flex;
  align-items: center;
  min-height: 2.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--echo-panel-line);
  background: var(--echo-panel-soft);
  color: var(--echo-muted);
}

.echo-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.echo-nav a {
  padding: 0.7rem 0.95rem;
  border-radius: var(--echo-radius-control);
  border: 1px solid transparent;
  background: transparent;
  color: var(--echo-muted);
  text-decoration: none;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.echo-nav a:hover {
  color: var(--echo-heading);
  background: var(--echo-panel-soft);
  border-color: var(--echo-panel-line);
}

/* ======================== Main / sections ======================== */
.echo-main {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-top: 1.25rem;
}

.echo-intro,
.echo-panel,
.echo-stage-shell {
  position: relative;
  border: 1px solid var(--echo-panel-line);
  background: var(--echo-shell-bg);
  box-shadow: var(--echo-shadow-soft);
}

.echo-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  gap: 1.5rem;
  align-items: stretch;
  padding: 1.75rem;
  border-radius: calc(var(--echo-radius-shell) + 0.25rem);
  overflow: hidden;
}

.echo-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(40rem 18rem at -10% -20%, rgba(91, 91, 245, 0.12), transparent 60%),
    radial-gradient(36rem 16rem at 110% 0%, rgba(255, 106, 91, 0.10), transparent 60%);
}

.echo-intro-copy {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: 52rem;
}

.echo-eyebrow {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(91, 91, 245, 0.28);
  background: var(--echo-accent-soft);
  color: var(--echo-accent);
}

.echo-intro h1,
.echo-panel-head h2 {
  margin: 0;
  font-family: var(--echo-font-display);
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 0.92;
  text-transform: uppercase;
  color: var(--echo-heading);
}

.echo-intro h1 {
  max-width: 14ch;
  font-size: clamp(2.6rem, 5vw, 4.6rem);
}

.echo-intro-lede {
  margin: 0;
  max-width: 40rem;
  font-size: clamp(1rem, 0.3vw + 0.95rem, 1.12rem);
  line-height: 1.7;
  color: var(--echo-muted);
}

.echo-intro-specs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.echo-spec-card,
.echo-module,
.echo-editor-surface,
.echo-output-shell {
  position: relative;
  border-radius: var(--echo-radius-panel);
  border: 1px solid var(--echo-panel-line);
  background: var(--echo-panel-soft);
}

.echo-spec-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 9.5rem;
  padding: 1.1rem;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.echo-spec-card:hover {
  transform: translateY(-2px);
  border-color: rgba(91, 91, 245, 0.28);
  box-shadow: var(--echo-shadow-soft);
}

.echo-spec-label { color: var(--echo-accent); }

.echo-spec-card strong {
  font-size: 1.05rem;
  line-height: 1.2;
  color: var(--echo-heading);
}

.echo-spec-card p {
  margin: 0;
  color: var(--echo-muted);
  line-height: 1.55;
  font-size: 0.94rem;
}

/* ======================== Stage (intro side) ======================== */
.echo-intro-stage { min-height: 100%; }

.echo-stage-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;
  padding: 1.25rem;
  border-radius: var(--echo-radius-panel);
  background:
    radial-gradient(20rem 12rem at 80% -10%, rgba(255, 106, 91, 0.18), transparent 70%),
    linear-gradient(160deg, #14161e 0%, #0a0c12 100%);
  border-color: rgba(255, 255, 255, 0.06);
  color: var(--echo-on-dark);
  overflow: hidden;
}

.echo-stage-topline,
.echo-stage-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  color: var(--echo-on-dark-muted);
}

.echo-stage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  flex: 1;
}

.echo-stage-display,
.echo-stage-block {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 9.5rem;
  padding: 1rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.echo-stage-label { color: var(--echo-on-dark-muted); }

.echo-stage-display strong {
  font-family: var(--echo-font-display);
  font-size: clamp(2rem, 3.4vw, 2.8rem);
  line-height: 0.95;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #fff;
}

.echo-stage-display p,
.echo-stage-mark-line,
.echo-stage-list {
  margin: 0;
  color: var(--echo-on-dark-muted);
}

.echo-stage-mark {
  justify-content: flex-end;
  background:
    linear-gradient(140deg, rgba(91, 91, 245, 0.22), rgba(122, 77, 255, 0.10) 60%, transparent),
    rgba(255, 255, 255, 0.02);
  border-color: rgba(91, 91, 245, 0.32);
}

.echo-stage-mark-word {
  font-family: var(--echo-font-display);
  font-size: clamp(2.6rem, 5.2vw, 4rem);
  line-height: 0.86;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #fff;
}

.echo-stage-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0;
  list-style: none;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.echo-stage-list li {
  padding-top: 0.45rem;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.echo-stage-ports { justify-content: space-between; }

.echo-stage-ports-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
}

.echo-stage-ports-row span {
  min-height: 0.5rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--echo-accent), var(--echo-accent-strong));
  opacity: 0.75;
  animation: echo-port-pulse 2.6s ease-in-out infinite;
}

.echo-stage-ports-row span:nth-child(2) { animation-delay: 0.3s; opacity: 0.55; }
.echo-stage-ports-row span:nth-child(3) { animation-delay: 0.6s; opacity: 0.4; }

.echo-stage-footer span {
  flex: 1;
  padding: 0.6rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  text-align: center;
  font-size: 0.68rem;
}

/* ======================== Echo rings (intro visual) ======================== */
.echo-echo-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--echo-radius-panel);
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 50%, rgba(91, 91, 245, 0.18), transparent 60%),
    linear-gradient(160deg, #14161e 0%, #0a0c12 100%);
  border: 1px solid rgba(255, 255, 255, 0.06);
  isolation: isolate;
}

.echo-echo-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(255, 106, 91, 0.16), transparent 50%),
    radial-gradient(circle at 20% 80%, rgba(122, 77, 255, 0.18), transparent 55%);
  pointer-events: none;
}

.echo-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%) scale(1);
  opacity: 0;
  animation: echo-ring-pulse 4s cubic-bezier(0.22, 0.61, 0.36, 1) infinite;
  pointer-events: none;
}

.echo-ring-1 { animation-delay: 0s; border-color: rgba(91, 91, 245, 0.65); }
.echo-ring-2 { animation-delay: 0.7s; border-color: rgba(122, 77, 255, 0.55); }
.echo-ring-3 { animation-delay: 1.4s; border-color: rgba(255, 106, 91, 0.5); }
.echo-ring-4 { animation-delay: 2.1s; border-color: rgba(91, 91, 245, 0.35); }
.echo-ring-5 { animation-delay: 2.8s; border-color: rgba(122, 77, 255, 0.25); }

.echo-echo-core {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 36%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--echo-accent), var(--echo-accent-strong) 70%, var(--echo-coral));
  box-shadow:
    0 0 60px rgba(91, 91, 245, 0.45),
    0 20px 50px rgba(15, 17, 23, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
  color: #fff;
  text-align: center;
}

.echo-echo-mark {
  font-family: var(--echo-font-display);
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  letter-spacing: 0.06em;
  line-height: 1;
  text-transform: uppercase;
}

.echo-echo-sub {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  opacity: 0.85;
}

@keyframes echo-ring-pulse {
  0%   { transform: translate(-50%, -50%) scale(0.9); opacity: 0; border-width: 2px; }
  10%  { opacity: 0.9; }
  100% { transform: translate(-50%, -50%) scale(5.2); opacity: 0; border-width: 0.5px; }
}

@media (prefers-reduced-motion: reduce) {
  .echo-ring { animation: none; opacity: 0.5; }
  .echo-ring-1 { transform: translate(-50%, -50%) scale(1.6); }
  .echo-ring-2 { transform: translate(-50%, -50%) scale(2.4); }
  .echo-ring-3 { transform: translate(-50%, -50%) scale(3.2); }
  .echo-ring-4 { transform: translate(-50%, -50%) scale(4); opacity: 0.3; }
  .echo-ring-5 { transform: translate(-50%, -50%) scale(4.8); opacity: 0.15; }
}

/* ======================== Workbench grid ======================== */
.echo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.78fr);
  gap: 1.25rem;
  align-items: start;
}

.echo-panel {
  padding: 1.5rem;
  border-radius: var(--echo-radius-shell);
}

.echo-editor-panel,
.echo-side-panel,
.echo-reader-panel,
.echo-console-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.echo-reader-panel,
.echo-console-panel { grid-column: 1 / -1; }

.echo-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--echo-panel-line);
}

.echo-panel-head h2 { font-size: clamp(1.5rem, 2.2vw, 2.1rem); }

.echo-panel-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.echo-panel-summary {
  margin: 0;
  max-width: 56rem;
  color: var(--echo-muted);
  line-height: 1.65;
}

.echo-editor-surface,
.echo-output-shell {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.1rem;
}

.echo-side-stack {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.echo-module {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
}

.echo-module-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--echo-panel-line);
}

.echo-module-label { color: var(--echo-accent); }

/* ======================== Buttons ======================== */
button.echo-ghost-button,
button.echo-profile-chip,
button.echo-button,
.echo-dropzone-cta {
  border: 1px solid var(--echo-panel-line);
  border-radius: var(--echo-radius-control);
  background: var(--echo-shell-bg);
  color: var(--echo-text);
  text-decoration: none;
  box-shadow: 0 1px 0 rgba(15, 17, 23, 0.02);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease, color 160ms ease;
}

.echo-ghost-button,
.echo-profile-chip { padding: 0.75rem 0.95rem; }

.echo-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1rem;
}

.echo-ghost-button:hover,
.echo-profile-chip:hover,
.echo-button.secondary:hover {
  transform: translateY(-1px);
  border-color: var(--echo-accent);
  color: var(--echo-accent);
  background: var(--echo-accent-soft);
}

.echo-nav a:focus-visible,
.echo-dropzone:focus-visible,
.echo-button:focus-visible,
.echo-profile-chip:focus-visible,
.echo-ghost-button:focus-visible,
.echo-input:focus-visible,
.echo-textarea:focus-visible,
.echo-range:focus-visible {
  outline: none;
  border-color: var(--echo-accent);
  box-shadow: 0 0 0 3px var(--echo-focus);
}

/* ======================== Dropzone ======================== */
.echo-dropzone {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
  border-radius: var(--echo-radius-panel);
  border: 1.5px dashed rgba(91, 91, 245, 0.32);
  background:
    linear-gradient(180deg, rgba(91, 91, 245, 0.04), transparent 60%),
    var(--echo-shell-bg);
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.echo-dropzone.is-dragover,
.echo-dropzone:hover {
  transform: translateY(-1px);
  border-color: var(--echo-accent);
  background:
    linear-gradient(180deg, rgba(91, 91, 245, 0.08), transparent 60%),
    var(--echo-shell-bg);
  box-shadow: var(--echo-shadow-soft);
}

.echo-dropzone p {
  margin: 0.1rem 0;
  color: var(--echo-muted);
  line-height: 1.55;
}

.echo-dropzone strong { color: var(--echo-heading); }

.echo-dropzone code {
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  background: var(--echo-panel-soft);
  border: 1px solid var(--echo-panel-line);
  color: var(--echo-heading);
  font-size: 0.86em;
}

.echo-dropzone-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 11rem;
  padding: 0.95rem 1.1rem;
  border-color: transparent;
  background: linear-gradient(135deg, var(--echo-accent), var(--echo-accent-strong));
  color: var(--echo-accent-ink);
  box-shadow: var(--echo-shadow-pop);
}

.echo-dropzone:hover .echo-dropzone-cta {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.echo-file-input {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
}

/* ======================== Meta + fields ======================== */
.echo-meta-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.echo-file-meta,
.echo-text-meta,
.echo-profile-copy,
.echo-voice-meta,
.echo-note,
.echo-progress-label {
  margin: 0;
  line-height: 1.55;
  color: var(--echo-muted);
}

.echo-file-meta,
.echo-text-meta {
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--echo-panel-line);
  background: var(--echo-panel-soft);
}

.echo-field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.echo-field-full { width: 100%; }

.echo-field-label,
.echo-slider-label,
.echo-slider-value { color: var(--echo-muted); }

.echo-input,
.echo-textarea {
  width: 100%;
  border-radius: var(--echo-radius-control);
  border: 1px solid var(--echo-panel-line);
  background: var(--echo-shell-bg);
  color: var(--echo-text);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.echo-input { padding: 0.85rem 0.95rem; }

.echo-input option {
  background: var(--echo-shell-bg);
  color: var(--echo-text);
}

.echo-input:disabled { opacity: 0.65; cursor: not-allowed; }

.echo-textarea {
  min-height: 30rem;
  padding: 1.35rem 1.25rem;
  resize: vertical;
  font-family: var(--echo-font-sans);
  font-size: 1rem;
  line-height: 1.72;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.28), transparent 28%),
    var(--echo-paper);
  color: #1b1d24;
  overflow-wrap: anywhere;
}

.echo-textarea::placeholder { color: rgba(15, 17, 23, 0.44); }

/* ======================== Profile chips ======================== */
.echo-profile-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
}

.echo-profile-chip.is-active {
  border-color: transparent;
  background: linear-gradient(135deg, var(--echo-accent), var(--echo-accent-strong));
  color: var(--echo-accent-ink);
  box-shadow: var(--echo-shadow-pop);
}

.echo-profile-copy,
.echo-voice-meta {
  padding: 0.7rem 0.85rem;
  border-radius: var(--echo-radius-control);
  border: 1px solid var(--echo-panel-line);
  background: var(--echo-panel-soft);
}

.echo-sample-audio {
  display: block;
  width: 100%;
  margin-top: 0.7rem;
}

/* ======================== Sliders ======================== */
.echo-slider-stack {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.echo-slider {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr) 56px;
  align-items: center;
  gap: 0.75rem;
}

.echo-range {
  width: 100%;
  accent-color: var(--echo-accent);
}

/* ======================== Waveform / monitor ======================== */
.echo-waveform {
  display: flex;
  align-items: end;
  gap: 0.24rem;
  min-height: 4rem;
  padding: 0.6rem 0.5rem 0.5rem;
  border-radius: var(--echo-radius-control);
  border: 1px solid var(--echo-panel-line);
  background:
    linear-gradient(180deg, rgba(91, 91, 245, 0.06), transparent 50%),
    var(--echo-panel-soft);
}

.echo-bar {
  width: 0.28rem;
  height: 0.45rem;
  border-radius: 999px;
  background: rgba(15, 17, 23, 0.14);
}

.echo-bar.is-active {
  animation: echo-pulse var(--echo-bar-duration, 0.78s) ease-in-out infinite alternate;
  background: linear-gradient(180deg, var(--echo-accent-strong), var(--echo-accent));
}

/* ======================== Transport buttons ======================== */
.echo-runner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.echo-button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--echo-accent), var(--echo-accent-strong));
  color: var(--echo-accent-ink);
  box-shadow: var(--echo-shadow-pop);
}

.echo-button.primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.06);
  box-shadow: 0 18px 40px rgba(91, 91, 245, 0.30);
}

.echo-button.secondary { color: var(--echo-text); }

.echo-button.secondary.danger {
  border-color: rgba(227, 74, 69, 0.28);
  background: rgba(227, 74, 69, 0.06);
  color: var(--echo-danger);
}

.echo-button.secondary.danger:hover {
  border-color: var(--echo-danger);
  background: rgba(227, 74, 69, 0.12);
  color: var(--echo-danger);
}

.echo-button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
  box-shadow: none;
  filter: none;
}

/* ======================== Progress / status ======================== */
.echo-progress-shell {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.9rem;
  border-radius: var(--echo-radius-control);
  border: 1px solid var(--echo-panel-line);
  background: var(--echo-panel-soft);
}

.echo-status {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(91, 91, 245, 0.22);
  background: var(--echo-accent-soft);
  color: var(--echo-accent);
}

.echo-status[data-tone='ok'] {
  border-color: rgba(48, 195, 154, 0.28);
  background: var(--echo-mint-soft);
  color: var(--echo-ok);
}

.echo-status[data-tone='error'] {
  border-color: rgba(227, 74, 69, 0.28);
  background: rgba(227, 74, 69, 0.08);
  color: var(--echo-danger);
}

.echo-progress-track {
  width: 100%;
  height: 0.45rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(15, 17, 23, 0.08);
}

.echo-progress-bar {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--echo-accent), var(--echo-accent-strong), var(--echo-coral));
  transition: width 180ms ease;
}

/* ======================== Readback output ======================== */
.echo-output-rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--echo-panel-line);
  color: var(--echo-muted);
}

.echo-output {
  position: relative;
  min-height: 22rem;
  max-height: clamp(22rem, 52vh, 34rem);
  padding: 1.4rem 1.5rem;
  border-radius: var(--echo-radius-panel);
  border: 1px solid var(--echo-panel-line);
  background:
    linear-gradient(180deg, rgba(91, 91, 245, 0.05), transparent 24%),
    var(--echo-paper);
  color: #1b1d24;
  white-space: pre-wrap;
  line-height: 1.95;
  font-size: 1.02rem;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  overflow-wrap: anywhere;
}

.echo-word {
  display: inline-block;
  padding: 0.05rem 0.08rem;
  border-radius: 0.32rem;
  transition:
    background-color 120ms ease,
    color 120ms ease,
    box-shadow 120ms ease,
    transform 120ms ease;
}

.echo-word.is-read {
  background: rgba(91, 91, 245, 0.08);
  color: #2e3448;
}

.echo-word.is-active {
  background: linear-gradient(135deg, var(--echo-accent), var(--echo-accent-strong));
  color: var(--echo-accent-ink);
  box-shadow:
    0 0 0 0.18rem rgba(91, 91, 245, 0.16),
    0 6px 16px rgba(91, 91, 245, 0.28);
  transform: translateY(-1px);
}

.echo-note { color: var(--echo-dim); }

/* ======================== Console (dictation) ======================== */
.echo-console-shell {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.echo-console-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.echo-console-meta {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.echo-console-output-shell {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.1rem;
  border-radius: var(--echo-radius-panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: linear-gradient(160deg, #14161e 0%, #0a0c12 100%);
  color: var(--echo-on-dark);
}

.echo-console-output-shell .echo-output-rail {
  border-bottom-color: rgba(255, 255, 255, 0.08);
  color: var(--echo-on-dark-muted);
}

.echo-console-output {
  margin: 0;
  padding: 1rem 1.1rem;
  border-radius: 0.7rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: #d8e1ff;
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  font-size: 0.92rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 9rem;
}

/* ======================== Animations ======================== */
@keyframes echo-port-pulse {
  0%, 100% { opacity: 0.35; transform: scaleX(0.85); }
  50%      { opacity: 0.9;  transform: scaleX(1); }
}

@keyframes echo-pulse {
  from { height: 0.45rem; opacity: 0.42; }
  to   { height: var(--echo-bar-height, 1.6rem); opacity: 1; }
}

/* ======================== Responsive ======================== */
@media (max-width: 1180px) {
  .echo-intro,
  .echo-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .echo-shell {
    width: min(1280px, calc(100% - 1rem));
    padding-top: 0.75rem;
  }

  .echo-header,
  .echo-panel-head,
  .echo-dropzone {
    flex-direction: column;
    align-items: stretch;
  }

  .echo-intro,
  .echo-header,
  .echo-panel,
  .echo-stage-shell { border-radius: 1rem; }

  .echo-intro { padding: 1.25rem; }
  .echo-panel { padding: 1.1rem; }

  .echo-intro h1 {
    max-width: none;
    font-size: 2.6rem;
  }

  .echo-intro-specs,
  .echo-runner { grid-template-columns: 1fr; }

  .echo-stage-grid,
  .echo-profile-list { grid-template-columns: 1fr; }

  .echo-stage-display,
  .echo-stage-block { min-height: 0; }

  .echo-dropzone { grid-template-columns: 1fr; }

  .echo-dropzone-cta { width: 100%; }
}

@media (max-width: 620px) {
  .echo-mark { font-size: 2.2rem; }

  .echo-brand {
    flex-direction: column;
    align-items: flex-start;
  }

  .echo-panel-head h2 { font-size: 1.7rem; }

  .echo-textarea {
    min-height: 22rem;
    padding: 1.15rem 1rem;
  }

  .echo-slider {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .echo-output-rail {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .echo-nav a,
  .echo-ghost-button,
  .echo-profile-chip,
  .echo-button,
  .echo-dropzone,
  .echo-dropzone-cta,
  .echo-progress-bar,
  .echo-bar.is-active,
  .echo-stage-ports-row span,
  .echo-spec-card {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .echo-nav a:hover,
  .echo-ghost-button:hover,
  .echo-profile-chip:hover,
  .echo-button:hover,
  .echo-dropzone:hover,
  .echo-dropzone:hover .echo-dropzone-cta,
  .echo-spec-card:hover { transform: none; }
}