/* ==========================================================================
   VNET — Survei Kepuasan Pelanggan
   Design language: fiber-signal motif, deep signal-blue + amber accent,
   sharp/minimal corners, Space Grotesk + IBM Plex Sans + IBM Plex Mono.
   ========================================================================== */

:root {
  --ink: #10192b;
  --ink-soft: #4b5670;
  --ink-faint: #8792a6;

  --bg: #f4f5f8;
  --surface: #ffffff;

  --border: #e1e4ea;
  --border-strong: #c7ccd8;

  --brand: #1c3faa;
  --brand-ink: #12297a;
  --brand-tint: #eaf0ff;

  --accent: #e8a33d;
  --accent-tint: #fbebd1;

  --danger: #b8452f;
  --danger-tint: #fbeae6;

  --radius-sm: 3px;
  --radius-md: 6px;

  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --shadow-card: 0 1px 2px rgba(16, 25, 43, 0.04), 0 8px 24px rgba(16, 25, 43, 0.04);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ---------------------------------------------------------------------- */
/* Progress bar — one deliberate motion cue, fills like a signal charging */
/* ---------------------------------------------------------------------- */

.progress-rail {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border);
  z-index: 50;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 120ms ease-out;
}

@media (prefers-reduced-motion: reduce) {
  .progress-fill {
    transition: none;
  }
}

/* ---------------------------------------------------------------------- */
/* Shell / layout                                                          */
/* ---------------------------------------------------------------------- */

.shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 20px 96px;
}

/* ---------------------------------------------------------------------- */
/* Header                                                                  */
/* ---------------------------------------------------------------------- */

.brandmark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--brand);
  font-weight: 500;
  margin-bottom: 20px;
}

.brandmark svg {
  flex-shrink: 0;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(26px, 5vw, 32px);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.page-header p {
  color: var(--ink-soft);
  font-size: 15.5px;
  max-width: 52ch;
  margin: 0 0 6px;
}

.page-header .meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
}

/* Fiber pulse divider — the one animated moment on the page */
.pulse-divider {
  position: relative;
  height: 2px;
  background: var(--border);
  margin: 28px 0 40px;
  overflow: visible;
}

.pulse-divider .node {
  position: absolute;
  top: 50%;
  left: -4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateY(-50%);
  animation: travel 3.2s ease-in-out infinite;
}

@keyframes travel {
  0% { left: -1%; opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { left: 99%; opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .pulse-divider .node {
    animation: none;
    left: 0;
    opacity: 1;
  }
}

/* ---------------------------------------------------------------------- */
/* Sections                                                                 */
/* ---------------------------------------------------------------------- */

.section {
  margin-bottom: 40px;
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 20px;
}

.section-badge {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--brand);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  margin: 2px 0 4px;
}

.section-head p {
  color: var(--ink-soft);
  font-size: 14px;
  margin: 0;
}

/* ---------------------------------------------------------------------- */
/* Question groups                                                         */
/* ---------------------------------------------------------------------- */

.question {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 12px;
  transition: border-color 120ms ease;
}

.question.has-error {
  border-color: var(--danger);
  background: var(--danger-tint);
}

.question legend,
.question .q-label {
  font-weight: 500;
  font-size: 15px;
  color: var(--ink);
  margin: 0 0 12px;
  padding: 0;
  display: block;
}

.q-error {
  display: block;
  color: var(--danger);
  font-size: 13px;
  margin-top: 10px;
}

/* Pill-style choice buttons, built on native radios for accessibility */
.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill-group input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.pill-group label {
  cursor: pointer;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
  user-select: none;
}

.pill-group label:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-tint);
}

.pill-group input[type="radio"]:checked + label {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.pill-group input[type="radio"]:focus-visible + label {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------------- */
/* Text inputs / textarea                                                  */
/* ---------------------------------------------------------------------- */

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 8px;
}

.field .hint {
  font-size: 12.5px;
  color: var(--ink-faint);
  font-weight: 400;
  margin-left: 4px;
}

.field input[type="text"],
.field input[type="tel"],
.field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.field textarea {
  min-height: 110px;
  resize: vertical;
  font-family: var(--font-body);
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-tint);
}

/* ---------------------------------------------------------------------- */
/* Star rating (Section C)                                                  */
/* ---------------------------------------------------------------------- */

.star-rating {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
  gap: 4px;
}

.star-rating input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.star-rating label {
  cursor: pointer;
  color: var(--border-strong);
  transition: color 120ms ease, transform 120ms ease;
}

.star-rating label svg {
  width: 34px;
  height: 34px;
  display: block;
}

.star-rating input[type="radio"]:focus-visible + label {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.star-rating label:hover,
.star-rating label:hover ~ label,
.star-rating input[type="radio"]:checked ~ label {
  color: var(--accent);
}

.star-rating-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.star-rating-caption {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
}

/* ---------------------------------------------------------------------- */
/* Submit                                                                   */
/* ---------------------------------------------------------------------- */

.submit-row {
  margin-top: 32px;
}

button.submit {
  width: 100%;
  background: var(--brand);
  color: #fff;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  cursor: pointer;
  transition: background 120ms ease, transform 80ms ease;
}

button.submit:hover {
  background: var(--brand-ink);
}

button.submit:active {
  transform: translateY(1px);
}

.submit-note {
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-faint);
  margin-top: 12px;
}

/* ---------------------------------------------------------------------- */
/* Global error summary                                                    */
/* ---------------------------------------------------------------------- */

.error-summary {
  background: var(--danger-tint);
  border: 1px solid var(--danger);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 28px;
  font-size: 14px;
  color: var(--danger);
}

.error-summary strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-weight: 600;
}

/* ---------------------------------------------------------------------- */
/* Thank-you page                                                          */
/* ---------------------------------------------------------------------- */

.thanks-card {
  text-align: left;
  padding-top: 64px;
}

.thanks-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 24px;
}

.thanks-card h1 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 12px;
}

.thanks-card p {
  color: var(--ink-soft);
  font-size: 15.5px;
  max-width: 48ch;
  margin: 0 0 8px;
}

.thanks-card .back-link {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--brand);
  text-decoration: none;
  border-bottom: 1px solid var(--brand-tint);
}

.thanks-card .back-link:hover {
  border-bottom-color: var(--brand);
}

@media (max-width: 420px) {
  .shell {
    padding: 32px 16px 80px;
  }
  .question {
    padding: 16px;
  }
}