/* ========================================
   POSITION SIZE CALCULATOR — OXY ALGO
   ======================================== */

/* --- RESET & VARIABLES --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #050508;
  --bg2: #08080e;
  --surface: #0c0c16;
  --surface2: #111120;
  --surface3: #161628;
  --border: rgba(255,255,255,0.06);
  --border2: rgba(255,255,255,0.12);
  --accent: #00FF88;
  --accent-dim: #00cc6a;
  --accent-glow: rgba(0,255,136,0.12);
  --accent-glow2: rgba(0,255,136,0.25);
  --gold: #f59e0b;
  --gold-dim: #d97706;
  --gold-glow: rgba(245,158,11,0.12);
  --red: #ef4444;
  --red-glow: rgba(239,68,68,0.15);
  --blue: #3b82f6;
  --blue-glow: rgba(59,130,246,0.15);
  --purple: #8b5cf6;
  --purple-glow: rgba(139,92,246,0.15);
  --text: #e8eaf0;
  --text2: #8890a8;
  --text3: #555d78;
  --font-head: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --radius-pill: 100px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: #33ffaa; }

/* --- AMBIENT BACKGROUND --- */
.ambient-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.ambient-bg .blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  animation: blobFloat 20s ease-in-out infinite alternate;
}
.ambient-bg .blob-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,255,136,0.08), transparent 70%);
  top: -200px; left: -100px;
}
.ambient-bg .blob-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59,130,246,0.06), transparent 70%);
  bottom: -150px; right: -100px;
  animation-delay: -10s;
}
.ambient-bg .blob-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(139,92,246,0.05), transparent 70%);
  top: 50%; left: 60%;
  animation-delay: -5s;
}
@keyframes blobFloat {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -30px) scale(1.1); }
}

/* --- NAV --- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5,5,8,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo .dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-glow2);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}
.nav-links a {
  color: var(--text2);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

/* --- CONTAINER --- */
.container {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- HERO --- */
.hero {
  text-align: center;
  padding: 60px 0 40px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-glow);
  border: 1px solid rgba(0,255,136,0.2);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero-badge .pulse {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}
.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 16px;
  color: var(--text2);
  max-width: 560px;
  margin: 0 auto;
}

/* --- CALCULATOR LAYOUT --- */
.calc-section {
  padding: 0 0 80px;
}
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

/* --- CARD --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.card-title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.card-title svg { color: var(--accent); flex-shrink: 0; }

/* --- FORM FIELDS --- */
.field-group {
  margin-bottom: 20px;
}
.field-group:last-child { margin-bottom: 0; }

label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text2);
  margin-bottom: 8px;
  letter-spacing: 0.2px;
}

select, input[type="number"] {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-xs);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  -moz-appearance: textfield;
}
select {
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238890a8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
select option { background: var(--surface2); color: var(--text); }
select optgroup { color: var(--text3); font-weight: 600; }

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none; margin: 0;
}

select:focus, input[type="number"]:focus {
  border-color: rgba(0,255,136,0.4);
  box-shadow: 0 0 0 3px rgba(0,255,136,0.08);
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.input-wrap input {
  padding-left: 32px;
}
.input-prefix {
  position: absolute;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text3);
  pointer-events: none;
  z-index: 1;
}
.input-suffix {
  position: absolute;
  right: 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text3);
  pointer-events: none;
}
.input-wrap .input-suffix ~ input,
.input-wrap input {
  width: 100%;
}

/* --- QUICK RISK BUTTONS --- */
.quick-btns {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.quick-btns button {
  flex: 1;
  padding: 8px 0;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.2s;
}
.quick-btns button:hover {
  border-color: rgba(0,255,136,0.3);
  color: var(--text);
}
.quick-btns button.active {
  background: var(--accent-glow);
  border-color: rgba(0,255,136,0.4);
  color: var(--accent);
}

/* --- SLIDER --- */
.slider-wrap {
  margin-bottom: 12px;
}
input[type="range"] {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--surface3);
  border-radius: 3px;
  outline: none;
  margin: 8px 0;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 12px rgba(0,255,136,0.3);
  transition: box-shadow 0.2s;
}
input[type="range"]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 20px rgba(0,255,136,0.5);
}
input[type="range"]::-moz-range-thumb {
  width: 20px; height: 20px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 12px rgba(0,255,136,0.3);
}
.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text3);
}
.risk-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
  font-size: 13px;
}

/* --- RISK AMOUNT ROW --- */
.risk-amount-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 10px 14px;
}
.risk-label {
  font-size: 13px;
  color: var(--text3);
}
.risk-amount {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--gold);
}

/* --- OR DIVIDER --- */
.divider-or {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
}
.divider-or::before, .divider-or::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.divider-or span {
  font-size: 12px;
  color: var(--text3);
  white-space: nowrap;
}

/* --- PRICE ROW --- */
.price-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.price-row .field-group { margin-bottom: 0; }
.price-row input { padding: 12px 14px; }

/* --- RESULTS CARD --- */
.results-card {
  border-color: rgba(0,255,136,0.15);
  background: linear-gradient(180deg, rgba(0,255,136,0.03) 0%, var(--surface) 40%);
}

.result-main {
  text-align: center;
  padding: 24px 0 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}
.result-label {
  font-size: 13px;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.result-value {
  font-family: var(--font-mono);
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 0 40px rgba(0,255,136,0.2);
  transition: all 0.3s var(--ease-out);
}
.result-unit {
  font-size: 14px;
  color: var(--text3);
  margin-top: 6px;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}
.result-item {
  background: var(--surface2);
  border-radius: var(--radius-xs);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.result-item-label {
  font-size: 11px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.result-item-value {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.result-item-value.loss { color: var(--red); }

.result-note {
  font-size: 12px;
  color: var(--text3);
  text-align: center;
  padding: 12px;
  background: var(--surface2);
  border-radius: var(--radius-xs);
  margin-bottom: 20px;
  line-height: 1.5;
}

/* --- RISK BAR --- */
.result-bar { margin-top: 4px; }
.result-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  margin-bottom: 8px;
}
.result-bar-label span:first-child { color: var(--text3); }
.result-bar-label span:last-child {
  font-family: var(--font-mono);
  font-weight: 600;
}
.result-bar-track {
  width: 100%;
  height: 6px;
  background: var(--surface3);
  border-radius: 3px;
  overflow: hidden;
}
.result-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s var(--ease-out), background 0.3s;
  background: var(--accent);
}
.result-bar-labels {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text3);
  margin-top: 4px;
}

/* --- CTA CARD --- */
.cta-card {
  background: linear-gradient(135deg, rgba(0,255,136,0.05), rgba(59,130,246,0.03));
  border-color: rgba(0,255,136,0.1);
}
.cta-card-inner { text-align: center; }
.cta-card h3 {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}
.cta-card p {
  font-size: 13px;
  color: var(--text2);
  margin-bottom: 16px;
  line-height: 1.6;
}
.cta-btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #050508;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 100px;
  transition: all 0.3s var(--ease);
  box-shadow: 0 0 20px rgba(0,255,136,0.15);
}
.cta-btn-sm:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0,255,136,0.25);
  color: #050508;
}

/* --- ACCORDION --- */
.accordion-card { padding: 0; overflow: hidden; }
.accordion-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--text2);
  cursor: pointer;
  transition: color 0.2s;
}
.accordion-btn:hover { color: var(--text); }
.accordion-btn span {
  display: flex;
  align-items: center;
  gap: 10px;
}
.accordion-btn svg { color: var(--accent); }
.accordion-chevron {
  transition: transform 0.3s var(--ease);
  color: var(--text3) !important;
}
.accordion-btn.open .accordion-chevron { transform: rotate(180deg); }
.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}
.accordion-body.open { max-height: 600px; }
.accordion-content {
  padding: 0 28px 28px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

/* --- FORMULA --- */
.formula-block {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 16px;
  margin-bottom: 20px;
}
.formula-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text3);
  margin-bottom: 8px;
}
.formula-block code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  word-break: break-all;
}
.formula-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 16px;
}
.step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.step-num {
  width: 24px; height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}
.step strong {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}
.step p {
  font-size: 12px;
  color: var(--text2);
  line-height: 1.5;
}
.formula-note {
  font-size: 11px;
  color: var(--text3);
  padding: 10px 12px;
  background: var(--surface2);
  border-radius: var(--radius-xs);
  line-height: 1.5;
}

/* --- FOOTER --- */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  position: relative;
  z-index: 1;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--text3);
}
.footer-link {
  font-size: 13px;
  color: var(--text3);
  transition: color 0.2s;
}
.footer-link:hover { color: var(--accent); }

/* --- ANIMATIONS --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.calc-inputs .card { animation: fadeUp 0.5s var(--ease-out) both; }
.calc-inputs .card:nth-child(2) { animation-delay: 0.1s; }
.calc-results .card { animation: fadeUp 0.5s var(--ease-out) both; }
.calc-results .results-card { animation-delay: 0.15s; }
.calc-results .cta-card { animation-delay: 0.25s; }
.calc-results .accordion-card { animation-delay: 0.3s; }

@keyframes resultPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}
.result-value.pop { animation: resultPop 0.3s var(--ease-out); }

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero { padding: 40px 0 24px; }
  .hero p { font-size: 15px; }
  .card { padding: 20px; }
  .quick-btns { flex-wrap: wrap; }
  .quick-btns button { flex: 0 0 calc(33.33% - 6px); }
  .price-row { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .result-value { font-size: 40px; }
  .nav-links { gap: 16px; }
  .footer-inner { justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  nav { padding: 0 16px; }
  .card { padding: 16px; }
  .results-grid { grid-template-columns: 1fr; }
  .accordion-btn { padding: 16px; }
  .accordion-content { padding: 0 16px 16px; padding-top: 16px; }
}