@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,600;1,400&family=Plus+Jakarta+Sans:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #F0F2F7;
  --surface: #FFFFFF;
  --surface-2: #F8F9FC;
  --border: #DDE1EC;
  --border-strong: #C5CADB;
  --navy: #1E3A5F;
  --navy-light: #2A5080;
  --gold: #C8973A;
  --gold-bg: rgba(200, 151, 58, 0.08);
  --gold-border: rgba(200, 151, 58, 0.22);
  --blue: #2563EB;
  --blue-bg: rgba(37, 99, 235, 0.07);
  --blue-border: rgba(37, 99, 235, 0.18);
  --green: #15803D;
  --green-bg: rgba(21, 128, 61, 0.07);
  --green-border: rgba(21, 128, 61, 0.22);
  --red: #B91C1C;
  --red-bg: rgba(185, 28, 28, 0.06);
  --red-border: rgba(185, 28, 28, 0.2);
  --text: #0F172A;
  --text-2: #475569;
  --text-3: #94A3B8;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --ease: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.07), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
}

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

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ──────────────────────────────────────────────── */
header {
  background: var(--navy);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-mark {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-name {
  font-family: 'Lora', serif;
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  letter-spacing: -0.01em;
  line-height: 1;
}

.brand-tag {
  font-size: 10px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.5px;
  line-height: 1;
}

.header-badge {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.3px;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ADE80;
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5);
  animation: pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5);
  }

  50% {
    box-shadow: 0 0 0 5px rgba(74, 222, 128, 0);
  }
}

/* ── Overview ────────────────────────────────────────────── */
.overview {
  background: var(--navy);
  padding-bottom: 40px;
}

.overview-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 36px 24px 0;
}

.overview-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 10px;
}

.overview-title {
  font-family: 'Lora', serif;
  font-size: 2rem;
  font-weight: 600;
  color: #FFFFFF;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.overview-title em {
  font-style: italic;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.6);
}

.overview-body {
  font-size: 13.5px;
  font-weight: 300;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.55);
  max-width: 640px;
  margin-bottom: 28px;
}

.overview-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  width: fit-content;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.stat-value {
  font-family: 'Lora', serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
}

.stat-desc {
  font-size: 10px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.stat-div {
  width: 1px;
  height: 28px;
  background: rgba(255, 255, 255, 0.1);
}

/* ── Main ─────────────────────────────────────────────────── */
main {
  max-width: 820px;
  margin: 0 auto;
  padding: 28px 24px 60px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ── Module ───────────────────────────────────────────────── */
.module {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  animation: slideUp 0.45s ease both;
}

.module:last-child {
  animation-delay: 0.08s;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.module-header {
  padding: 28px 28px 0;
  border-bottom: 1px solid var(--border);
  padding-bottom: 22px;
  background: var(--surface-2);
}

.module-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.module-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1.5px;
  color: var(--blue);
  background: var(--blue-bg);
  border: 1px solid var(--blue-border);
  border-radius: 4px;
  padding: 2px 7px;
}

.module-type {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--text-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 7px;
}

.module-title {
  font-family: 'Lora', serif;
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: -0.01em;
  margin-bottom: 7px;
  line-height: 1.2;
}

.module-desc {
  font-size: 12.5px;
  font-weight: 300;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 580px;
}

.module-body {
  padding: 26px 28px;
}

/* ── Form Layout ─────────────────────────────────────────── */
.form-row {
  display: flex;
  gap: 16px;
  align-items: flex-end;
}

.form-row .field {
  flex: 1;
}

.form-action {
  flex-shrink: 0;
  padding-bottom: 22px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.form-footer {
  padding-top: 4px;
}

/* ── Field ───────────────────────────────────────────────── */
.field {
  margin-bottom: 0;
}

.field label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.6px;
  color: var(--text-2);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.field-hint {
  display: block;
  font-size: 11px;
  font-weight: 300;
  color: var(--text-3);
  margin-top: 5px;
}

.input-wrap {
  position: relative;
}

.prefix {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-3);
  pointer-events: none;
  user-select: none;
  transition: color var(--ease);
}

.field:focus-within .prefix {
  color: var(--navy);
}

.field input {
  width: 100%;
  min-height: 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--text);
  outline: none;
  -webkit-appearance: none;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.field input.has-prefix {
  padding-left: 28px;
}

.field input::placeholder {
  color: var(--text-3);
  font-size: 12px;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.field input:focus {
  border-color: var(--navy-light);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.08);
}

.field input:hover:not(:focus) {
  border-color: var(--border-strong);
}

/* ── Button ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.4px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: opacity var(--ease), transform var(--ease), box-shadow var(--ease);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--navy);
  color: #FFFFFF;
  box-shadow: 0 1px 3px rgba(30, 58, 95, 0.25);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--navy-light);
  box-shadow: 0 4px 12px rgba(30, 58, 95, 0.3);
}

.btn-primary:active {
  transform: scale(0.97);
  opacity: 0.9;
}

.btn-icon {
  flex-shrink: 0;
}

.btn.loading {
  pointer-events: none;
  opacity: 0.5;
  color: transparent;
}

.btn.loading .btn-icon {
  opacity: 0;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: spin 0.65s linear infinite;
  color: #FFFFFF;
}

.btn-primary.loading::after {
  border-top-color: #fff;
}

@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* ── Error ───────────────────────────────────────────────── */
.err {
  display: none;
  margin-top: 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--red);
  background: var(--red-bg);
  border: 1px solid var(--red-border);
  border-radius: var(--radius-xs);
  padding: 10px 14px;
}

/* ── Result ──────────────────────────────────────────────── */
.result {
  display: none;
  margin-top: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  animation: popIn 0.28s cubic-bezier(0.2, 0, 0, 1) both;
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: translateY(6px) scale(0.98);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.result.neutral {
  border-color: var(--gold-border);
  background: var(--gold-bg);
}

.result.success {
  border-color: var(--green-border);
  background: var(--green-bg);
}

.result.danger {
  border-color: var(--red-border);
  background: var(--red-bg);
}

.result-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
}

.result-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-label {
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-3);
}

.result-value {
  font-family: 'Lora', serif;
  font-size: 2rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
}

.result.neutral .result-value {
  color: var(--gold);
}

.result.success .result-value {
  color: var(--green);
}

.result.danger .result-value {
  color: var(--red);
}

.result-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  text-align: right;
  max-width: 260px;
}

.result-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.neutral-icon {
  background: var(--gold-bg);
  color: var(--gold);
  border: 1px solid var(--gold-border);
}

.success-icon {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}

.danger-icon {
  background: var(--red-bg);
  color: var(--red);
  border: 1px solid var(--red-border);
}

.result-note {
  font-size: 12px;
  font-weight: 300;
  color: var(--text-2);
  line-height: 1.55;
}

/* ── Module Separator ────────────────────────────────────── */
.module-sep {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 0;
}

.module-sep::before,
.module-sep::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.module-sep span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-brand {
  font-family: 'Lora', serif;
  font-size: 12px;
  font-weight: 600;
  color: var(--navy);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-links span {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-3);
}

.f-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-3);
}

/* ── Number input cleanup ────────────────────────────────── */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

input[type=number] {
  -moz-appearance: textfield;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 540px) {
  .overview-title {
    font-size: 1.6rem;
  }

  .form-row {
    flex-direction: column;
  }

  .form-action {
    padding-bottom: 0;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .result-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .result-right {
    align-items: flex-start;
    text-align: left;
  }

  .module-header,
  .module-body {
    padding-left: 20px;
    padding-right: 20px;
  }

  .overview-stats {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
  }
}