/* ==========================================================================
   MAHKOTA PERMATA — TASTESKILL RUNBOOK: THE NAME AS A MONUMENT
   Direction: The name as a monument
   Palette: Bottle green and gold (Ground: #0f1c15, Surface: #16261d, Ink: #f4f6f0, Accent: #c8a86b, Signal: #d4af37)
   Type: Boska (Regular 400, Italic 401, Medium 500) via Fontshare
   Structure: Monumental typography hero, quiet balanced editorial columns
   Centralized Single Source of Truth for all pages.
   ========================================================================== */

:root {
  --bg: #0f1c15;
  --surface: #16261d;
  --surface-lift: #1f3327;
  --surface-deep: #09120e;
  --ink: #f4f6f0;
  --muted: #a8b5ab;
  --accent: #c8a86b;
  --accent-ink: #0f1c15;
  --signal: #d4af37;
  --signal-ink: #0f1c15;

  --font-family: 'Boska', Georgia, serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --step-small: 0.9375rem; /* 15px */
  --step-body: 1.125rem;  /* 18px */
  --step-lead: clamp(1.2rem, 1.1rem + 0.5vw, 1.45rem);
  --step-head: clamp(1.85rem, 1.4rem + 2vw, 2.75rem);
  --step-monument: clamp(2.6rem, 2rem + 4.5vw, 5.2rem);

  --gap-section: clamp(4rem, 7vw, 7rem);
  --radius-sm: 4px;
  --radius-md: 6px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --t-base: 180ms;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: auto;
  background-color: var(--bg);
  color: var(--ink);
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-family);
  font-size: var(--step-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl, dd {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  background: var(--surface);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ==========================================================================
   Page Frame & Layout Architecture
   ========================================================================== */
.page-wrap {
  width: 100%;
  max-width: 1360px;
  margin-inline: auto;
  padding-inline: 40px;
  display: flex;
  flex-direction: column;
  min-height: 100svh;
}

@media (max-width: 640px) {
  .page-wrap {
    padding-inline: 20px;
  }
}

/* ==========================================================================
   Navigation Header
   ========================================================================== */
.site-header {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 2rem 0;
  border-bottom: 2px solid var(--surface);
}

@media (min-width: 768px) {
  .site-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.brand-monogram {
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--ink);
  text-transform: uppercase;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
}

.brand-monogram span {
  color: var(--accent);
  font-style: italic;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: var(--step-small);
  padding: 0.45rem 0.85rem;
  color: var(--muted);
  border-radius: var(--radius-sm);
  transition: color var(--t-base) var(--ease-out), background var(--t-base) var(--ease-out);
}

.nav-link:hover {
  color: var(--ink);
  background: var(--surface);
}

.nav-link.active {
  color: var(--accent-ink);
  background: var(--accent);
  font-weight: 500;
}

/* ==========================================================================
   Motion Layer
   ========================================================================== */
@keyframes monumentRise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.monument-hero .monument-title {
  animation: monumentRise 0.6s var(--ease-out) both;
}

.monument-hero .monument-sub {
  animation: monumentRise 0.6s 0.1s var(--ease-out) both;
}

.monument-hero .cta-row {
  animation: monumentRise 0.6s 0.2s var(--ease-out) both;
}

.editorial-block,
.gem-grid,
.tool-container,
.specs-table,
.archive-figure {
  animation: monumentRise 0.6s var(--ease-out) both;
}

@media (prefers-reduced-motion: reduce) {
  .monument-hero .monument-title,
  .monument-hero .monument-sub,
  .monument-hero .cta-row,
  .editorial-block,
  .gem-grid,
  .tool-container,
  .specs-table,
  .archive-figure {
    animation: none;
  }
}

/* ==========================================================================
   Monument Hero Section
   ========================================================================== */
.monument-hero {
  padding: 4rem 0 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-align: center;
  align-items: center;
}

.monument-title {
  font-size: var(--step-monument);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 24ch;
}

.monument-title em {
  font-style: italic;
  color: var(--accent);
}

.monument-sub {
  font-size: var(--step-lead);
  color: var(--muted);
  max-width: 58ch;
  line-height: 1.5;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  justify-content: center;
  padding-top: 0.75rem;
}

.btn-gold {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 2rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-sans);
  font-size: var(--step-body);
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  transition: opacity var(--t-base) var(--ease-out), transform var(--t-base) var(--ease-out);
}

.btn-gold:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

.btn-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 1.8rem;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-body);
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  transition: background var(--t-base) var(--ease-out), transform var(--t-base) var(--ease-out);
}

.btn-dark:hover {
  background: var(--surface-lift);
  transform: translateY(-1px);
}

/* ==========================================================================
   Showcase Figure
   ========================================================================== */
.hero-figure {
  margin: 1rem 0 3rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface);
}

.hero-img {
  width: 100%;
  height: clamp(340px, 48vw, 560px);
  object-fit: cover;
  object-position: center;
}

.figure-meta {
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  font-size: var(--step-small);
  color: var(--muted);
  background: var(--surface);
}

/* ==========================================================================
   Editorial Content Flow
   ========================================================================== */
.content-stream {
  display: flex;
  flex-direction: column;
  gap: var(--gap-section);
  padding: 2rem 0;
}

.editorial-block {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.block-title {
  font-size: var(--step-head);
  font-weight: 400;
  line-height: 1.1;
  color: var(--ink);
}

.block-title em {
  font-style: italic;
  color: var(--accent);
}

.block-body {
  font-size: var(--step-body);
  color: var(--ink);
  line-height: 1.6;
  max-width: 68ch;
}

/* Editorial Ledger / Specimen List */
.ledger-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.ledger-item {
  padding: 1.25rem 0;
  border-bottom: 2px solid var(--surface);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  animation: monumentRise 0.5s var(--ease-out) both;
}

.ledger-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--ink);
}

.card-tag {
  font-family: var(--font-sans);
  font-size: var(--step-small);
  color: var(--accent);
  font-weight: 500;
}

.card-text {
  font-size: var(--step-body);
  color: var(--ink);
  line-height: 1.55;
}

/* ==========================================================================
   Interactive Micro-Tool: The Live Thing
   Gemstone Carat, Cut & Ring Sizer Estimator
   ========================================================================== */
.tool-container {
  background: var(--surface);
  padding: clamp(1.75rem, 3.5vw, 3rem);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.tool-top {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tool-heading {
  font-size: 1.65rem;
  font-weight: 400;
  color: var(--ink);
}

.tool-sub {
  font-size: var(--step-body);
  color: var(--muted);
}

.tool-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .tool-body {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2.5rem;
    align-items: start;
  }
}

.tool-controls {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.field-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.field-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  font-size: var(--step-body);
  color: var(--ink);
}

.field-val {
  color: var(--accent);
  font-weight: 500;
}

.slider-range {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
  height: 24px;
}

.selector-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

@media (min-width: 480px) {
  .selector-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.toggle-btn {
  background: var(--surface-lift);
  border: none;
  padding: 0.75rem 0.5rem;
  font-family: var(--font-sans);
  font-size: var(--step-small);
  color: var(--muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: background var(--t-base) var(--ease-out), color var(--t-base) var(--ease-out);
}

.toggle-btn.active {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 500;
}

.tool-readout {
  background: var(--surface-deep);
  padding: 1.75rem;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--surface);
}

.metric-name {
  font-family: var(--font-sans);
  font-size: var(--step-small);
  color: var(--muted);
}

.metric-data {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--ink);
}

.metric-data span {
  font-size: var(--step-small);
  color: var(--accent);
}

.tool-submit {
  display: block;
  width: 100%;
  padding: 1rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-sans);
  font-size: var(--step-body);
  font-weight: 500;
  text-align: center;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: opacity var(--t-base) var(--ease-out);
}

.tool-submit:hover {
  opacity: 0.92;
}

/* ==========================================================================
   Specs & Technical Tables
   ========================================================================== */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.specs-table th,
.specs-table td {
  padding: 1.1rem 1rem;
  text-align: left;
  font-size: var(--step-body);
}

.specs-table th {
  font-family: var(--font-sans);
  font-size: var(--step-small);
  color: var(--muted);
  background: var(--surface);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.specs-table td {
  color: var(--ink);
  background: var(--surface);
}

.specs-table tr:nth-child(even) td {
  background: var(--surface-lift);
}

/* ==========================================================================
   Editorial Archive Figure
   ========================================================================== */
.archive-figure {
  margin: 1.5rem 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface);
}

.archive-img {
  width: 100%;
  height: clamp(280px, 35vw, 420px);
  object-fit: cover;
  transition: transform 300ms var(--ease-out);
}

.archive-img:hover {
  transform: scale(1.015);
}

.archive-caption {
  padding: 0.85rem 1.25rem;
  font-family: var(--font-sans);
  font-size: var(--step-small);
  color: var(--muted);
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  margin-top: 5rem;
  padding: 3rem 0;
  border-top: 2px solid var(--surface);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-link {
  font-family: var(--font-sans);
  font-size: var(--step-small);
  color: var(--muted);
  transition: color var(--t-base) var(--ease-out);
}

.footer-link:hover {
  color: var(--ink);
}

.footer-statement {
  font-size: var(--step-monument);
  font-weight: 400;
  color: var(--muted);
  letter-spacing: -0.02em;
  line-height: 0.95;
  text-transform: uppercase;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: var(--step-small);
  color: var(--muted);
}