/* =====================================================
   SubnetPro — Brown & Beige Theme
   Warm, rich tones with clean typography
   ===================================================== */

:root {
  /* Core palette */
  --brown-900:  #2c1a0e;
  --brown-800:  #3d2314;
  --brown-700:  #5c3317;
  --brown-600:  #7a4520;
  --brown-500:  #9c5a2d;
  --brown-400:  #b87040;
  --brown-300:  #d4956a;
  --brown-200:  #e8c4a0;
  --brown-100:  #f2dcc4;

  --beige-900:  #3a2e24;
  --beige-800:  #5a4a3a;
  --beige-700:  #7a6a58;
  --beige-600:  #9a8a78;
  --beige-500:  #b8a898;
  --beige-400:  #cfc0b0;
  --beige-300:  #ddd0c4;
  --beige-200:  #ece4da;
  --beige-100:  #f5f0ea;
  --beige-50:   #faf7f4;

  --amber:      #c97d2a;
  --amber-light:#e8a84a;
  --green-dark: #2d6a3a;
  --green-mid:  #4a8a56;
  --green-light:#82c492;

  --text-dark:  #2c1a0e;
  --text-mid:   #5c4030;
  --text-soft:  #8a6a55;
  --text-muted: #b0927a;

  --bg-page:    #f5f0ea;
  --bg-card:    #faf7f4;
  --bg-card2:   #f0e8de;

  --border-main: #d8c8b8;
  --border-soft: #e8ddd2;

  --shadow-sm: 0 1px 3px rgba(44,26,14,0.08), 0 1px 2px rgba(44,26,14,0.06);
  --shadow-md: 0 4px 12px rgba(44,26,14,0.10), 0 2px 4px rgba(44,26,14,0.06);
  --shadow-lg: 0 10px 30px rgba(44,26,14,0.12), 0 4px 10px rgba(44,26,14,0.08);
}

/* ── RESET & BASE ─────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Lato', system-ui, sans-serif;
  background: var(--bg-page);
  color: var(--text-dark);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── PAGE WRAP ────────────────────────────────────── */
.page-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ── HEADER ───────────────────────────────────────── */
.site-header {
  background: var(--brown-800);
  border-radius: 16px;
  padding: 36px 40px;
  margin-bottom: 28px;
  color: var(--beige-100);
  box-shadow: var(--shadow-lg);
  animation: slideDown 0.5s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 52px; height: 52px;
  background: var(--brown-600);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber-light);
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

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

.brand-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--beige-100);
  letter-spacing: -0.3px;
  line-height: 1;
}

.brand-tag {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.72rem;
  color: var(--brown-300);
  letter-spacing: 0.08em;
}

.header-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.meta-chip {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  padding: 10px 18px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-align: center;
}

.chip-label {
  font-size: 0.65rem;
  color: var(--brown-300);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.chip-value {
  font-family: 'Playfair Display', serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--beige-100);
}

.status-live { color: #82c492; }

.hero-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: var(--beige-50);
  letter-spacing: -0.5px;
  margin-bottom: 10px;
  line-height: 1.15;
}

.hero-sub {
  font-size: 1rem;
  color: var(--brown-300);
  max-width: 680px;
  line-height: 1.7;
}

/* ── TAB NAV ──────────────────────────────────────── */
.tab-nav {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  animation: fadeUp 0.4s 0.1s ease backwards;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--bg-card);
  border: 2px solid var(--border-main);
  border-radius: 10px;
  color: var(--text-soft);
  font-family: 'Lato', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.22s ease;
  letter-spacing: 0.02em;
}

.tab-btn:hover {
  border-color: var(--brown-400);
  color: var(--brown-700);
  background: var(--beige-100);
  box-shadow: var(--shadow-sm);
}

.tab-btn.active {
  background: var(--brown-700);
  border-color: var(--brown-700);
  color: var(--beige-50);
  box-shadow: var(--shadow-md);
}

.tab-pill {
  background: rgba(255,255,255,0.18);
  border-radius: 20px;
  padding: 2px 9px;
  font-size: 0.72rem;
  font-family: 'Source Code Pro', monospace;
  letter-spacing: 0.05em;
}

.tab-btn:not(.active) .tab-pill {
  background: var(--beige-200);
  color: var(--text-soft);
}

/* ── PANELS ───────────────────────────────────────── */
.proto-panel { display: none; }
.proto-panel.active { display: block; animation: fadeUp 0.4s ease; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── CARDS ────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.input-card {
  margin-bottom: 24px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-soft);
}

.card-head-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-icon-box {
  width: 36px; height: 36px;
  background: var(--beige-200);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brown-600);
  flex-shrink: 0;
}

.card-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-dark);
}

.card-badge {
  background: var(--brown-700);
  color: var(--beige-100);
  font-family: 'Source Code Pro', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.1em;
}

/* ── INPUTS ───────────────────────────────────────── */
.input-row-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

@media (max-width: 680px) {
  .input-row-grid { grid-template-columns: 1fr; }
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-mid);
  letter-spacing: 0.03em;
}

.field-input {
  padding: 13px 16px;
  background: var(--beige-50);
  border: 1.5px solid var(--border-main);
  border-radius: 9px;
  font-family: 'Source Code Pro', monospace;
  font-size: 0.95rem;
  color: var(--text-dark);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

.field-input:focus {
  border-color: var(--brown-500);
  box-shadow: 0 0 0 3px rgba(156,90,45,0.12);
  background: #ffffff;
}

.field-input::placeholder { color: var(--text-muted); }

.v6-input { font-size: 0.85rem; }

.field-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cidr-slash {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--brown-600);
  line-height: 1;
}

.range-input {
  flex: 1;
  -webkit-appearance: none;
  height: 5px;
  background: var(--border-main);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--brown-600);
  cursor: pointer;
  border: 3px solid var(--beige-50);
  box-shadow: 0 1px 4px rgba(44,26,14,0.3);
  transition: transform 0.15s;
}

.range-input::-webkit-slider-thumb:hover { transform: scale(1.2); }

.cidr-num {
  width: 74px;
  text-align: center;
  padding: 13px 8px;
}

/* ── CALCULATE BUTTON ─────────────────────────────── */
.calc-btn {
  width: 100%;
  padding: 16px 32px;
  background: var(--brown-700);
  color: var(--beige-50);
  border: none;
  border-radius: 10px;
  font-family: 'Lato', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.22s ease;
  box-shadow: 0 4px 14px rgba(92,51,23,0.3);
}

.calc-btn:hover {
  background: var(--brown-600);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(92,51,23,0.35);
}

.calc-btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* ── ERROR BOX ────────────────────────────────────── */
.error-box {
  margin-top: 14px;
  padding: 13px 16px;
  background: #fff3f0;
  border: 1px solid #e8a090;
  border-radius: 9px;
  color: #8b2e20;
  font-size: 0.88rem;
  font-weight: 600;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-8px); }
  75%      { transform: translateX(8px); }
}

/* ── RESULTS HEADER ───────────────────────────────── */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 10px;
}

.results-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.results-badge {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--brown-800);
  color: var(--beige-100);
  padding: 5px 14px;
  border-radius: 20px;
}

/* ── RESULT GRID ──────────────────────────────────── */
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.result-card {
  animation: cardIn 0.45s ease backwards;
}

.result-card:nth-child(1) { animation-delay: 0.05s; }
.result-card:nth-child(2) { animation-delay: 0.10s; }
.result-card:nth-child(3) { animation-delay: 0.15s; }
.result-card:nth-child(4) { animation-delay: 0.20s; }

@keyframes cardIn {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.result-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ── DATA ROWS ────────────────────────────────────── */
.result-rows {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.rrow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-soft);
  gap: 12px;
  transition: background 0.15s;
}

.rrow:last-child { border-bottom: none; }

.rrow:hover {
  background: var(--beige-100);
  padding-left: 6px;
  padding-right: 6px;
  border-radius: 6px;
  margin: 0 -6px;
}

.rrow.accent {
  background: rgba(156,90,45,0.06);
  padding: 10px 10px;
  border-radius: 7px;
  margin: 2px -2px;
  border-bottom: none;
}

.rlabel {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-soft);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.rvalue {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.88rem;
  color: var(--text-dark);
  font-weight: 500;
  text-align: right;
}

.rvalue.small-val, .small-val { font-size: 0.75rem; }

.copyable {
  cursor: pointer;
  transition: color 0.15s;
}
.copyable:hover { color: var(--brown-600); text-decoration: underline; }

/* Binary rows */
.binary-row {
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.binary-box {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.72rem;
  color: var(--brown-700);
  background: var(--beige-100);
  border: 1px solid var(--border-main);
  border-radius: 7px;
  padding: 10px 12px;
  width: 100%;
  word-break: break-all;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

.small-bin { font-size: 0.64rem; }

/* ── PILLS / BADGES ───────────────────────────────── */
.pill {
  display: inline-block;
  font-family: 'Source Code Pro', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

.pill-brown {
  background: var(--beige-200);
  color: var(--brown-700);
  border: 1px solid var(--brown-300);
}

.pill-green {
  background: #e8f4ec;
  color: var(--green-dark);
  border: 1px solid #a8d4b4;
}

.pill-amber {
  background: #fff4e0;
  color: #8a5a10;
  border: 1px solid #e8c070;
}

.code-val {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.82rem;
  background: var(--beige-200);
  color: var(--brown-700);
  padding: 3px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-main);
}

/* ── HOST BAR ─────────────────────────────────────── */
.host-bar-wrap {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
}

.host-bar-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-soft);
  font-weight: 600;
  margin-bottom: 8px;
}

.host-bar-track {
  height: 8px;
  background: var(--beige-200);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border-main);
}

.host-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--brown-600), var(--amber));
  border-radius: 4px;
  width: 0%;
  transition: width 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── FOOTER ───────────────────────────────────────── */
.site-footer {
  margin-top: 50px;
  padding: 32px 0 16px;
  border-top: 2px solid var(--border-main);
  text-align: center;
  animation: fadeUp 0.4s ease;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.footer-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--brown-800);
}

.footer-ver {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--text-soft);
}

.footer-links {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 4px;
}

.flink {
  font-size: 0.85rem;
  color: var(--text-soft);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}

.flink:hover { color: var(--brown-700); }

.fsep { color: var(--text-muted); }

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.6;
}

/* ── COPY TOAST ───────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--brown-800);
  color: var(--beige-100);
  font-family: 'Source Code Pro', monospace;
  font-size: 0.82rem;
  padding: 11px 20px;
  border-radius: 9px;
  z-index: 9999;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

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

@media (max-width: 600px) {
  .result-grid { grid-template-columns: 1fr; }
  .site-header { padding: 24px 20px; }
  .header-top { flex-direction: column; align-items: flex-start; }
  .tab-btn { padding: 11px 18px; }
  .page-wrap { padding: 14px 12px 40px; }
  .card { padding: 20px; }
}