@font-face {
  font-family: 'LaNord';
 src: url('fonts/LaNord-Regular.otf') format('opentype');
}
@font-face {
  font-family: 'PolySans';
   src: url('fonts/PolySans\ Slim\ Mono.otf') format('opentype');
}

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

:root {
  --black: #080808;
  --white: #f5f5f0;
  --accent: #f17bf5;
  --grid: rgba(255,255,255,0.05);
  --grid-size: 48px;
  --ease: cubic-bezier(.23,1,.32,1);
}

html, body {
  background: var(--black);
  color: var(--white);
  font-family: 'PolySans', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

/* GRID BG */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  pointer-events: none;
  z-index: 0;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 40px;
  background: linear-gradient(to bottom, rgba(8,8,8,0.95) 0%, transparent 100%);
}
.logo-wrap svg {
  height: 28px;
  width: auto;
  display: block;
}
.nav-back {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  text-decoration: none;
  opacity: 0.5;
  transition: opacity 0.2s;
}
.nav-back:hover { opacity: 1; }

/* WRAPPER */
.brief-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 120px 40px 80px;
}

/* STEPPER TRACK */
.stepper-track {
  width: 100%;
  max-width: 680px;
  margin-bottom: 56px;
  display: flex;
  align-items: center;
  gap: 0;
}
.step-pip {
  flex: 1;
  height: 2px;
  background: rgba(255,255,255,0.1);
  transition: background 0.4s;
  position: relative;
}
.step-pip.done { background: var(--accent); }
.step-pip.active { background: var(--white); }
.step-pip:first-child { border-radius: 2px 0 0 2px; }
.step-pip:last-child  { border-radius: 0 2px 2px 0; }

/* STEP COUNTER */
.step-counter {
  width: 100%;
  max-width: 680px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 48px;
}
.step-counter-num {
  font-family: 'LaNord', serif;
  font-size: clamp(56px, 8vw, 96px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--accent);
  user-select: none;
}
.step-counter-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.4;
}

/* FORM CARD */
.form-card {
  width: 100%;
  max-width: 680px;
  animation: fadeUp 0.5s var(--ease) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.step-title {
  font-family: 'LaNord', serif;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 40px;
}

/* FIELDS */
.field-group {
  margin-bottom: 28px;
}
.field-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.45;
  margin-bottom: 10px;
}
.field-subtitle {
  font-size: 11px;
  opacity: 0.3;
  margin-bottom: 10px;
  line-height: 1.5;
}
.field-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.15);
  color: var(--white);
  font-family: 'PolySans', monospace;
  font-size: 16px;
  padding: 12px 0;
  outline: none;
  transition: border-color 0.3s;
  caret-color: var(--accent);
}
.field-input::placeholder { color: rgba(255,255,255,0.2); }
.field-input:focus {
  border-bottom-color: var(--accent);
}
.field-input.required-error {
  border-bottom-color: #ff4444;
}

/* BUTTONS */
.buttons {
  display: flex;
  gap: 16px;
  margin-top: 48px;
  align-items: center;
}
.btn-next {
  font-family: 'LaNord', serif;
  font-size: clamp(18px, 2.5vw, 28px);
  letter-spacing: -0.01em;
  background: var(--white);
  color: var(--black);
  border: 3px solid var(--black);
  box-shadow: 5px 5px 0px var(--accent);
  padding: 14px 36px;
  cursor: pointer;
  transition: box-shadow 0.12s, transform 0.12s;
  text-transform: none;
}
.btn-next:hover {
  box-shadow: 2px 2px 0px var(--accent);
  transform: translate(3px, 3px);
}
.btn-next:disabled {
  opacity: 0.25;
  cursor: not-allowed;
  transform: none;
  box-shadow: 5px 5px 0px var(--accent);
}
.btn-prev {
  font-family: 'LaNord', serif;
  font-size: clamp(18px, 2.5vw, 28px);
  letter-spacing: -0.01em;
  background: transparent;
  color: var(--white);
  border: 3px solid rgba(255,255,255,0.3);
  box-shadow: 5px 5px 0px rgba(255,255,255,0.1);
  padding: 14px 36px;
  cursor: pointer;
  transition: box-shadow 0.12s, transform 0.12s, border-color 0.2s;
  text-transform: none;
}
.btn-prev:hover {
  border-color: var(--white);
  box-shadow: 2px 2px 0px rgba(255,255,255,0.2);
  transform: translate(3px, 3px);
}
.btn-send {
  font-family: 'LaNord', serif;
  font-size: clamp(18px, 2.5vw, 28px);
  letter-spacing: -0.01em;
  background: var(--accent);
  color: var(--black);
  border: 3px solid var(--black);
  box-shadow: 5px 5px 0px var(--white);
  padding: 14px 48px;
  cursor: pointer;
  transition: box-shadow 0.12s, transform 0.12s;
  text-transform: none;
}
.btn-send:hover {
  box-shadow: 2px 2px 0px var(--white);
  transform: translate(3px, 3px);
}
.btn-send:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: 5px 5px 0px var(--white); }

/* CONFIRM STEP */
.confirm-intro {
  font-size: 13px;
  opacity: 0.45;
  margin-bottom: 36px;
  letter-spacing: 0.04em;
}
.confirm-list {
  list-style: none;
  padding: 0;
  margin-bottom: 8px;
}
.confirm-group {
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.confirm-group:last-child {
  border-bottom: none;
}
.confirm-group-title {
  font-family: 'LaNord', serif;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  opacity: 0.7;
}
.confirm-item {
  margin-bottom: 12px;
}
.confirm-key {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.35;
  margin-bottom: 3px;
}
.confirm-val {
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.85;
}
.confirm-val.empty {
  opacity: 0.2;
  font-style: italic;
}

/* SUCCESS */
.success-screen {
  text-align: center;
  animation: fadeUp 0.6s var(--ease) both;
}
.success-mark {
  font-family: 'LaNord', serif;
  font-size: 80px;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 24px;
}
.success-title {
  font-family: 'LaNord', serif;
  font-size: clamp(28px, 4vw, 48px);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.success-body {
  font-size: 13px;
  opacity: 0.45;
  margin-bottom: 40px;
}

/* ERROR MSG */
.error-msg {
  font-size: 11px;
  color: #ff4444;
  margin-top: 6px;
  letter-spacing: 0.06em;
  display: none;
}
.error-msg.visible { display: block; }

@media (max-width: 600px) {
  nav { padding: 20px; }
  .brief-wrapper { padding: 100px 20px 60px; }
  .buttons { flex-direction: column-reverse; align-items: stretch; }
  .btn-next, .btn-prev, .btn-send { text-align: center; }
}