/* ─── TOKENS ──────────────────────────────────────── */
:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --card: #161616;
  --border: #2a2a2a;
  --accent: #c8ff00;
  --accent2: #00e5ff;
  --danger: #ff3c3c;
  --text: #f0f0f0;
  --muted: #666;
  --mono: "Fira Code", monospace;
  --display: "Bebas Neue", sans-serif;
  --body: "DM Sans", sans-serif;
  --r: 8px;
  --max-w: 960px;
  --px: 40px;
}

/* ─── RESET ───────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  cursor: crosshair;
  font-size: 16px;
}

/* ─── LOADER ──────────────────────────────────────── */
#loader {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  transition:
    opacity 0.5s ease,
    visibility 0.5s ease;
}
#loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-hex {
  width: 80px;
  height: 80px;
  animation: loaderSpin 2s linear infinite;
  filter: drop-shadow(0 0 18px var(--accent));
}
.loader-hex .lhex {
  fill: var(--accent);
}
.loader-hex .lbolt {
  fill: #0a0a0a;
}

@keyframes loaderSpin {
  0% {
    transform: rotate(0deg) scale(1);
    filter: drop-shadow(0 0 8px var(--accent));
  }
  25% {
    transform: rotate(90deg) scale(1.08);
    filter: drop-shadow(0 0 22px var(--accent));
  }
  50% {
    transform: rotate(180deg) scale(1);
    filter: drop-shadow(0 0 8px var(--accent));
  }
  75% {
    transform: rotate(270deg) scale(1.08);
    filter: drop-shadow(0 0 22px var(--accent));
  }
  100% {
    transform: rotate(360deg) scale(1);
    filter: drop-shadow(0 0 8px var(--accent));
  }
}

.loader-bar-wrap {
  width: 200px;
  height: 2px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.loader-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 99px;
  animation: loadFill 1.6s ease forwards;
  box-shadow: 0 0 10px var(--accent);
}
@keyframes loadFill {
  to {
    width: 100%;
  }
}

.loader-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  animation: loaderFade 1.6s ease-in-out infinite alternate;
}
@keyframes loaderFade {
  from {
    opacity: 0.4;
  }
  to {
    opacity: 1;
  }
}

/* ─── SCANLINE ────────────────────────────────────── */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.13) 2px,
    rgba(0, 0, 0, 0.13) 4px
  );
  pointer-events: none;
  mix-blend-mode: multiply;
}

/* ─── CANVAS ──────────────────────────────────────── */
#particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ─── HEADER ──────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.93);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px var(--px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* BRAND */
.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-hex {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}
.logo-hex svg {
  width: 42px;
  height: 42px;
}
.hex-bg {
  fill: var(--accent);
  animation: hexPulse 3s ease-in-out infinite;
}
.hex-bolt {
  fill: #0a0a0a;
}
@keyframes hexPulse {
  0%,
  100% {
    filter: drop-shadow(0 0 4px var(--accent));
  }
  50% {
    filter: drop-shadow(0 0 16px var(--accent))
      drop-shadow(0 0 32px rgba(200, 255, 0, 0.4));
  }
}

.brand-name {
  font-family: var(--display);
  font-size: 28px;
  letter-spacing: 0.06em;
  color: var(--accent);
  line-height: 1;
}
.brand-tagline {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-top: 3px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  text-decoration: none;
  padding: 7px 14px;
  border: 1px solid transparent;
  border-radius: var(--r);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--accent);
  border-color: var(--border);
}
.nav-link.active {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}

.status-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 99px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}

/* ─── STEPPER ─────────────────────────────────────── */
.stepper-wrap {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 32px auto 0;
  padding: 0 var(--px);
}
.stepper {
  display: flex;
  align-items: center;
}
.step {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.3s;
}
.step span {
  display: inline;
}
.step.active {
  color: var(--accent);
}
.step.done {
  color: var(--accent2);
}
.step-bubble {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--mono);
  transition: all 0.3s;
  flex-shrink: 0;
}
.step.active .step-bubble {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 0 16px rgba(200, 255, 0, 0.4);
}
.step.done .step-bubble {
  border-color: var(--accent2);
  background: rgba(0, 229, 255, 0.12);
  color: var(--accent2);
}
.step-line {
  flex: 1;
  height: 1px;
  background: var(--border);
  margin: 0 10px;
  position: relative;
  overflow: hidden;
}
.step-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: lineScan 3s linear infinite;
}
@keyframes lineScan {
  to {
    left: 200%;
  }
}

/* ─── MAIN ────────────────────────────────────────── */
main {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 28px var(--px) 100px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ─── CARD ────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px 40px;
  position: relative;
  overflow: hidden;
  transition:
    border-color 0.3s,
    box-shadow 0.3s;
  animation: riseIn 0.5s cubic-bezier(0.22, 0.68, 0, 1.2) both;
}
.card:nth-child(1) {
  animation-delay: 0.05s;
}
.card:nth-child(2) {
  animation-delay: 0.12s;
}
.card:nth-child(3) {
  animation-delay: 0.19s;
}
.card:nth-child(4) {
  animation-delay: 0.26s;
}
@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
.card:hover {
  border-color: rgba(200, 255, 0, 0.2);
  box-shadow:
    0 0 40px rgba(200, 255, 0, 0.05),
    0 8px 40px rgba(0, 0, 0, 0.4);
}
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, rgba(200, 255, 0, 0.1), transparent);
  border-radius: 14px 0 70px 0;
  opacity: 0;
  transition: opacity 0.3s;
}
.card:hover::before {
  opacity: 1;
}

.card-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
  opacity: 0.7;
}
.card h2 {
  font-family: var(--display);
  font-size: 38px;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  color: var(--text);
}
.card-desc {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 28px;
  line-height: 1.7;
  font-family: var(--mono);
}

/* ─── UPLOAD ZONE ─────────────────────────────────── */
#upload-zone {
  border: 1.5px dashed var(--border);
  border-radius: 12px;
  padding: 44px 24px;
  text-align: center;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.02);
  transition: all 0.25s;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
#upload-zone::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at 50% 120%,
    rgba(200, 255, 0, 0.07),
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.3s;
}
#upload-zone:hover {
  border-color: var(--accent);
  background: rgba(200, 255, 0, 0.03);
}
#upload-zone:hover::before {
  opacity: 1;
}

.upload-icon-wrap {
  width: 60px;
  height: 60px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition:
    transform 0.3s,
    box-shadow 0.3s;
}
#upload-zone:hover .upload-icon-wrap {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(200, 255, 0, 0.2);
}
.upload-icon-wrap svg {
  width: 26px;
  height: 26px;
}
.upload-text {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}
.upload-filename {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  min-height: 18px;
}

/* ─── FIELDS ──────────────────────────────────────── */
.fields-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.fields-grid .field:last-child {
  grid-column: 1 / -1;
}

.field-label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 9px;
}
input[type="text"],
select {
  width: 100%;
  padding: 13px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  outline: none;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
  appearance: none;
  -webkit-appearance: none;
}
input[type="text"]:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(200, 255, 0, 0.12);
}
input::placeholder {
  color: var(--muted);
}
.select-wrap {
  position: relative;
}
.select-chevron {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--muted);
  pointer-events: none;
}

/* ─── PARAM ROWS ──────────────────────────────────── */
.param-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
  animation: riseIn 0.2s ease both;
}
.param-row .select-wrap {
  flex: 1;
  min-width: 0;
}
.param-row input[type="text"] {
  flex: 2;
  min-width: 0;
}

.btn-remove {
  width: 42px;
  min-width: 42px;
  height: 42px;
  border-radius: var(--r);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 22px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  margin-top: 0;
  padding: 0;
  line-height: 1;
}
.btn-remove:hover {
  background: rgba(255, 60, 60, 0.1);
  border-color: var(--danger);
  color: var(--danger);
}

/* ─── BUTTONS ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--r);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
  width: auto;
  margin-top: 0;
}
.btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
}
.btn-primary:hover {
  background: #d8ff22;
  box-shadow: 0 0 24px rgba(200, 255, 0, 0.4);
  transform: translateY(-1px);
}
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(200, 255, 0, 0.06);
}
.btn-run {
  width: 100%;
  justify-content: center;
  padding: 20px 32px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.16em;
  background: var(--accent);
  color: var(--bg);
  border-radius: 10px;
  position: relative;
  overflow: hidden;
}
.btn-run::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.25),
    transparent
  );
  transform: skewX(-15deg);
  transition: left 0.6s ease;
}
.btn-run:hover::after {
  left: 150%;
}
.btn-run:hover {
  box-shadow:
    0 0 40px rgba(200, 255, 0, 0.4),
    0 4px 20px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}
.btn-run:active {
  transform: translateY(0);
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 28px 0;
}

/* ─── RESULT ──────────────────────────────────────── */
.result-pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--accent);
  min-height: 120px;
  white-space: pre-wrap;
  word-break: break-word;
  margin-bottom: 16px;
}

/* ─── TOAST ───────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  color: var(--text);
  padding: 13px 20px;
  border-radius: var(--r);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateY(10px) scale(0.97);
  transition:
    opacity 0.25s,
    transform 0.25s;
  z-index: 9997;
  max-width: calc(100vw - 48px);
}
.toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.toast.err {
  border-left-color: var(--danger);
  color: #ff9999;
}

/* ─── SCROLLBAR ───────────────────────────────────── */
::-webkit-scrollbar {
  width: 5px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
═══════════════════════════════════════════════════ */

/* ── Large desktop (1200px+) ──── */
@media (min-width: 1200px) {
  :root {
    --max-w: 1020px;
  }
  .card h2 {
    font-size: 42px;
  }
}

/* ── Tablet landscape / small laptop (768px–1024px) ── */
@media (max-width: 1024px) {
  :root {
    --px: 28px;
  }
  .card {
    padding: 30px 32px;
  }
  .card h2 {
    font-size: 34px;
  }
}

/* ── Tablet portrait (600px–768px) ── */
@media (max-width: 768px) {
  :root {
    --px: 20px;
  }

  .brand-tagline {
    display: none;
  }
  .brand-name {
    font-size: 24px;
  }
  .logo-hex {
    width: 36px;
    height: 36px;
  }
  .logo-hex svg {
    width: 36px;
    height: 36px;
  }

  .status-chip {
    padding: 6px 10px;
    font-size: 10px;
  }
  #status-text {
    display: none;
  }

  .stepper-wrap {
    margin-top: 24px;
  }
  .step span {
    display: none;
  }
  .step-bubble {
    width: 28px;
    height: 28px;
    font-size: 11px;
  }
  .step-line {
    margin: 0 6px;
  }

  .card {
    padding: 24px 22px;
    border-radius: 12px;
  }
  .card h2 {
    font-size: 30px;
  }
  .card-desc {
    font-size: 13px;
  }

  .fields-grid {
    grid-template-columns: 1fr;
  }
  .fields-grid .field:last-child {
    grid-column: 1;
  }

  .param-row {
    flex-wrap: wrap;
  }
  .param-row .select-wrap {
    flex: 1 1 calc(50% - 26px);
  }
  .param-row input[type="text"] {
    flex: 1 1 100%;
    order: 3;
  }
  .btn-remove {
    order: 2;
  }

  main {
    padding: 20px var(--px) 80px;
    gap: 16px;
  }

  .btn-run {
    padding: 18px 24px;
    font-size: 14px;
  }
}

/* ── Mobile (max 600px) ── */
@media (max-width: 600px) {
  :root {
    --px: 16px;
  }

  .header-inner {
    padding: 12px var(--px);
  }
  .brand {
    gap: 10px;
  }
  .brand-name {
    font-size: 22px;
  }
  .logo-hex,
  .logo-hex svg {
    width: 34px;
    height: 34px;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 10px;
    letter-spacing: 0.04em;
  }

  .stepper-wrap {
    margin-top: 20px;
  }

  .card {
    padding: 22px 18px;
    border-radius: 10px;
  }
  .card-label {
    font-size: 10px;
  }
  .card h2 {
    font-size: 28px;
  }
  .card-desc {
    font-size: 12.5px;
    margin-bottom: 20px;
  }

  input[type="text"],
  select {
    font-size: 13px;
    padding: 12px 14px;
  }
  .field-label {
    font-size: 10px;
  }

  .btn {
    font-size: 11px;
    padding: 11px 18px;
  }
  .btn-run {
    font-size: 13px;
    padding: 16px 20px;
    letter-spacing: 0.12em;
  }

  #upload-zone {
    padding: 32px 16px;
  }
  .upload-text {
    font-size: 14px;
  }

  .result-pre {
    font-size: 11.5px;
    padding: 18px 14px;
  }

  .toast {
    bottom: 16px;
    right: 16px;
    left: 16px;
    font-size: 11px;
  }
}

/* ── Very small mobile (max 380px) ── */
@media (max-width: 380px) {
  .brand-name {
    font-size: 20px;
  }
  .nav-link {
    padding: 5px 8px;
  }
  .card h2 {
    font-size: 26px;
  }
  .step-bubble {
    width: 26px;
    height: 26px;
    font-size: 10px;
  }
}