/* ════════════════════════════════════════════════════════════════
   SSAIYAN 2 — core.css
   Dark navy blueprint tema, globalni stilovi i komponente
   ════════════════════════════════════════════════════════════════ */

/* ─── Supercharge font family ─── */
@font-face {
  font-family: 'Supercharge';
  src: url('fonts/Supercharge-JRgPo.otf') format('opentype');
  font-weight: normal; font-style: normal;
}
@font-face {
  font-family: 'Supercharge';
  src: url('fonts/SuperchargeItalic-ywOWd.otf') format('opentype');
  font-weight: normal; font-style: italic;
}
@font-face {
  font-family: 'SuperchargeCondensed';
  src: url('fonts/SuperchargeCondensed-jE5KO.otf') format('opentype');
  font-weight: normal; font-style: normal;
}
@font-face {
  font-family: 'SuperchargeStraight';
  src: url('fonts/SuperchargeStraight-nR87V.otf') format('opentype');
  font-weight: normal; font-style: normal;
}
@font-face {
  font-family: 'SuperchargeStraightCondensed';
  src: url('fonts/SuperchargeStraightCondensed-RpVWV.otf') format('opentype');
  font-weight: normal; font-style: normal;
}
@font-face {
  font-family: 'SuperchargeExpanded';
  src: url('fonts/SuperchargeExpanded-z83aw.otf') format('opentype');
  font-weight: normal; font-style: normal;
}
@font-face {
  font-family: 'SuperchargeGradient';
  src: url('fonts/SuperchargeGradient-51oqZ.otf') format('opentype');
  font-weight: normal; font-style: normal;
}
@font-face {
  font-family: 'Supercharge3D';
  src: url('fonts/Supercharge3D-GO79P.otf') format('opentype');
  font-weight: normal; font-style: normal;
}

/* ─── Satoshi (headings) ─── */
@font-face {
  font-family: 'Satoshi';
  src: url('fonts/Satoshi-Regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Satoshi';
  src: url('fonts/Satoshi-Bold.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Satoshi';
  src: url('fonts/Satoshi-Black.woff2') format('woff2');
  font-weight: 900; font-style: normal; font-display: swap;
}

/* ─── JetBrains Mono (mono) ─── */
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/JetBrainsMono-Regular.ttf') format('truetype');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/JetBrainsMono-Medium.ttf') format('truetype');
  font-weight: 500; font-style: normal; font-display: swap;
}

/* ─── Permanent Marker (hero naslov) ─── */
@font-face {
  font-family: 'Permanent Marker';
  src: url('fonts/PermanentMarker-Regular.ttf') format('truetype');
  font-weight: 400; font-style: normal; font-display: swap;
}

/* ─── CSS Variables ─── */
:root {
  /* Boje */
  --navy-900: #050d1a;
  --navy-800: #0a1929;
  --navy-700: #0f2138;
  --navy-600: #14304f;
  --navy-500: #1c4570;
  --blueprint-rgb: 245, 197, 24;
  --blueprint: #f5c518;
  --blueprint-light: #fdd835;
  --blueprint-grid: rgba(var(--blueprint-rgb), 0.06);
  --accent: #ff6b35;
  --accent-light: #ff8c5e;
  --text: #e0e6ed;
  --text-dim: #8a9bb0;
  --text-faint: #4a5c72;
  --border: rgba(var(--blueprint-rgb), 0.15);
  --border-strong: rgba(var(--blueprint-rgb), 0.3);

  /* Sjene */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --glow: 0 0 24px rgba(var(--blueprint-rgb), 0.3);

  /* Tipografija */
  --font-display: 'Supercharge', 'Satoshi', sans-serif;
  --font-display-condensed: 'SuperchargeCondensed', 'Satoshi', sans-serif;
  --font-head: 'Satoshi', 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;

  /* Spacing */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Tranzicije */
  --tr-fast: 0.15s ease;
  --tr-mid: 0.3s ease;
  --tr-slow: 0.5s ease;

  /* Surface aliasi — koriste se u svim modulima */
  --bg:       var(--navy-900);
  --surface:  var(--navy-800);
  --surface2: var(--navy-700);
}

/* ─── Light theme overrides ─── */
[data-theme="light"] {
  --blueprint-rgb: 184, 134, 11;
  --blueprint: #b8860b;
  --blueprint-light: #d4a017;
  --blueprint-grid: rgba(var(--blueprint-rgb), 0.05);
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.15);
  --text: #0f172a;
  --text-dim: #475569;
  --text-faint: #94a3b8;
  --navy-900: #f8fafc;
  --navy-800: #ffffff;
  --navy-700: #f1f5f9;
  --navy-600: #e2e8f0;
  --navy-500: #cbd5e1;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --glow: 0 0 24px rgba(var(--blueprint-rgb), 0.2);
}

/* Header stays dark — nav text must remain light in light mode */
[data-theme="light"] .site-header {
  background: rgba(30, 58, 95, 0.97);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}
[data-theme="light"] .site-nav a {
  color: rgba(255, 255, 255, 0.65);
}
[data-theme="light"] .site-nav a:hover { color: #ffffff; }
[data-theme="light"] .back-link { color: rgba(255, 255, 255, 0.65); }
[data-theme="light"] .back-link:hover { color: #f5c518; }
[data-theme="light"] .lang-toggle {
  color: rgba(255, 255, 255, 0.65);
  border-color: rgba(255, 255, 255, 0.25);
}
[data-theme="light"] .lang-toggle:hover {
  border-color: #f5c518;
  color: #ffffff;
}
[data-theme="light"] .lang-toggle .lang-active { color: #f5c518; }

/* Gold buttons — bright gold bg + dark text in light mode */
[data-theme="light"] .btn-primary {
  background: #f5c518;
  color: #0a1929;
  box-shadow: 0 0 24px rgba(245, 197, 24, 0.25);
}
[data-theme="light"] .btn-primary:hover {
  background: #fdd835;
  color: #0a1929;
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(245, 197, 24, 0.4);
}

/* ─── Theme toggle button ─── */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.55rem;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  line-height: 1;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--tr-fast);
}
.theme-toggle:hover {
  border-color: var(--blueprint);
  color: var(--text);
}
[data-theme="light"] .theme-toggle {
  border-color: rgba(255, 255, 255, 0.25);
  color: rgba(255, 255, 255, 0.65);
}
[data-theme="light"] .theme-toggle:hover {
  border-color: #f5c518;
  color: #ffffff;
}

/* ─── Reset & Base ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--navy-900);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blueprint-light); text-decoration: none; transition: color var(--tr-fast); }
a:hover { color: var(--accent-light); }

h1, h2, h3, h4, h5, h6 { font-family: var(--font-head); font-weight: 700; line-height: 1.2; }

img, svg { max-width: 100%; display: block; }

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ─── Blueprint pozadina ─── */
.blueprint-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--blueprint-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueprint-grid) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.8) 0%, transparent 70%);
}

/* ─── Layout ─── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.section { padding: 5rem 0; position: relative; z-index: 1; }
.section-alt { background: linear-gradient(180deg, transparent, var(--navy-800) 50%, transparent); }

.section-title {
  font-size: 1.75rem;
  text-align: center;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text), var(--blueprint-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-sub {
  text-align: center;
  color: var(--text-dim);
  margin-bottom: 3rem;
  font-size: 0.95rem;
}

/* ─── Header ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 13, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
  max-width: none;
  margin: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
  white-space: nowrap;
}
.brand-name {
  white-space: nowrap;
  color: #FFD600;
  font-family: 'Supercharge', 'Satoshi', sans-serif;
  letter-spacing: 0.04em;
  transition: text-shadow 0.2s;
}
.brand:hover .brand-name {
  text-shadow: 0 0 10px rgba(255,214,0,0.95), 0 0 25px rgba(255,214,0,0.7), 0 0 50px rgba(255,214,0,0.4);
}
.brand-mark {
  height: 36px;
  width: 36px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 0 8px rgba(245, 197, 24, 0.5));
}
.brand-version {
  color: #FFD600;
  font-weight: 900;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.site-nav a {
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--tr-fast);
}
.site-nav a:hover { color: var(--text); }

.lang-toggle {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  transition: all var(--tr-fast);
  white-space: nowrap;
}
.lang-toggle:hover { border-color: var(--blueprint); color: var(--text); }
.lang-toggle .lang-active { color: var(--blueprint-light); }

/* ─── Hero ─── */
.hero {
  padding: 7rem 0 5rem;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(var(--blueprint-rgb), 0.1);
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--blueprint-light);
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
}

.hero-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}
.hero-accent {
  background: linear-gradient(135deg, var(--blueprint), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--tr-mid);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--blueprint);
  color: white;
  box-shadow: var(--glow);
}
.btn-primary:hover {
  background: var(--blueprint-light);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(var(--blueprint-rgb), 0.4);
}
.btn-ghost {
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--blueprint);
  background: rgba(var(--blueprint-rgb), 0.05);
}

/* ─── Module groups ─── */
.module-group { margin-bottom: 3.5rem; }

.module-group-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.module-group-header h3 {
  font-size: 1.4rem;
  color: var(--text);
}

.badge {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}
.badge-ec2 { background: rgba(var(--blueprint-rgb), 0.15); color: var(--blueprint-light); border: 1px solid var(--blueprint); }
.badge-ec3 { background: rgba(255, 107, 53, 0.15); color: var(--accent-light); border: 1px solid var(--accent); }
.badge-ec4 { background: rgba(155, 89, 182, 0.15); color: #c39bd3; border: 1px solid #9b59b6; }
.badge-ec5 { background: rgba(180, 120, 40, 0.15); color: #d4a55a; border: 1px solid #b47828; }
.badge-ec6 { background: rgba(231, 76, 60, 0.15); color: #ec8a7a; border: 1px solid #e74c3c; }
.badge-ec7 { background: rgba(46, 204, 113, 0.15); color: #58d68d; border: 1px solid #2ecc71; }
.badge-ec8 { background: rgba(241, 196, 15, 0.15); color: #f4d03f; border: 1px solid #f1c40f; }
.badge-ec9 { background: rgba(127, 140, 141, 0.15); color: #aab7b8; border: 1px solid #7f8c8d; }

/* ─── Module cards ─── */
.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  justify-content: start;
}
@media (max-width: 640px) {
  .module-grid { grid-template-columns: 1fr; }
}

.module-card {
  display: block;
  padding: 1.5rem;
  background: var(--navy-800);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--tr-mid);
  position: relative;
  overflow: hidden;
}
.module-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, rgba(var(--blueprint-rgb), 0.08));
  opacity: 0;
  transition: opacity var(--tr-mid);
  pointer-events: none;
}
.module-card:hover:not(.disabled) {
  border-color: var(--blueprint);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.module-card:hover:not(.disabled)::before { opacity: 1; }
.module-card.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.module-icon {
  font-size: 2rem;
  color: var(--blueprint);
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  filter: drop-shadow(0 0 8px var(--blueprint-grid));
}
.module-card h4 {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.module-card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.module-status {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.status-active {
  background: rgba(46, 204, 113, 0.15);
  color: #58d68d;
  border: 1px solid rgba(46, 204, 113, 0.3);
}
.status-planned {
  background: rgba(138, 155, 176, 0.1);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

/* ─── About ─── */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  align-items: center;
}
@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
}

.about-text p { margin-bottom: 1rem; color: var(--text-dim); font-size: 1.05rem; }

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.stat {
  padding: 1.5rem;
  background: var(--navy-800);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-align: center;
}
.stat-num {
  font-family: var(--font-head);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--blueprint);
  line-height: 1;
}
.stat-label {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
}

/* ─── Footer ─── */
.site-footer {
  background: var(--navy-900);
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}
.footer-tag {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}
.footer-meta {
  text-align: right;
  color: var(--text-dim);
  font-size: 0.9rem;
}
@media (max-width: 640px) {
  .footer-meta { text-align: left; }
}

/* ─── Module page generic layout (za /ec2/greda/ itd.) ─── */
.module-page {
  min-height: 100vh;
  padding-top: 2rem;
}

.module-page-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.back-link {
  color: var(--text-dim);
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.back-link:hover { color: var(--blueprint-light); }

.module-page-title { font-size: 1.4rem; }

.module-layout {
  display: grid;
  grid-template-columns: 320px 1fr 360px;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 1100px) {
  .module-layout { grid-template-columns: 1fr; }
}

/* ─── Module layout v2 (2-column: input | content) ─── */
.module-layout-2col {
  display: grid;
  grid-template-columns: 300px 1fr;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ─── Left column: inputs ─── */
.input-panel {
  background: var(--navy-800);
  border-right: 1px solid var(--border);
  padding: 0.85rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow-y: auto;
}

.input-section {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.input-section-title {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--blueprint);
  text-transform: uppercase;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.4rem;
}

.form-row-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
}
.form-row-2col label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}
.form-row-2col input {
  width: 100%;
  padding: 0.4rem 0.6rem;
  background: var(--navy-900);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
}
.form-row-2col input:focus {
  outline: none;
  border-color: var(--blueprint);
  box-shadow: 0 0 0 2px rgba(var(--blueprint-rgb), 0.12);
}

.export-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

/* ─── Right: content column ─── */
.content-col {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

/* ─── Drawing panels row ─── */
.drawings-row {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.75rem;
  padding: 0.75rem;
}

.drawing-dots { display: none; } /* visible only at ≤900px via media query */

.drawing-panel {
  background: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.drawing-panel-title {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #444;
  text-transform: uppercase;
  border-bottom: 1px solid #e0e0e0;
  background: #f8f9fa;
  flex-shrink: 0;
}

.drawing-panel svg {
  flex: 1;
  width: 100%;
  height: 100%;
  min-height: 0;
}

/* ─── Result strip ─── */
.result-strip {
  display: flex;
  background: var(--navy-800);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.result-cell {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border-right: 1px solid var(--border);
}
.result-cell:last-child { border-right: none; }

.rc-label {
  font-size: 0.62rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.15rem;
}

.rc-value {
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text);
  line-height: 1.2;
}
.rc-value.ok   { color: #58d68d; }
.rc-value.warn { color: var(--accent-light); }
.rc-value.bad  { color: #ff5757; }

.rc-util { display: flex; align-items: center; gap: 0.35rem; }
.util-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #58d68d;
  flex-shrink: 0;
}
.util-dot.bad { background: #ff5757; }

/* ─── Tab bar ─── */
.tab-bar {
  display: flex;
  align-items: center;
  background: var(--navy-800);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  padding: 0 0.25rem;
}

.tab-btn {
  padding: 0.55rem 1rem;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--tr-fast);
  white-space: nowrap;
}
.tab-btn.active {
  color: var(--blueprint);
  border-bottom-color: var(--blueprint);
  background: rgba(var(--blueprint-rgb), 0.06);
}
.tab-btn.disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.tab-btn.disabled:hover { color: var(--text-dim); background: transparent; }
.tab-btn:hover:not(.active):not(.disabled) {
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.tab-norm {
  font-size: 0.7rem;
  color: var(--text-faint);
  margin-left: auto;
  padding-right: 0.75rem;
  font-family: var(--font-mono);
  white-space: nowrap;
}

/* ─── Tab content ─── */
.tab-content {
  display: none;
  padding: 0.75rem;
  background: var(--navy-900);
  gap: 0.6rem;
  flex-shrink: 0;
}
.tab-content.active { display: flex; }

.result-card {
  flex: 1;
  background: var(--navy-800);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.result-card.highlight { border-left: 3px solid var(--blueprint); }
.result-card .rc-label {
  font-size: 0.62rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.result-card .rc-value {
  font-size: 0.88rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text);
}

@media (max-width: 1100px) {
  .module-layout-2col { grid-template-columns: 265px 1fr; }
  .drawings-row { gap: 0.5rem; padding: 0.5rem; }
}
@media (max-width: 900px) {
  /* ── Brand: prevent "SAIYAN" + "2" splitting to 2 lines ── */
  .brand      { white-space: nowrap; }
  .brand-name { white-space: nowrap; }
  .site-nav   { gap: 0.75rem; }

  /* ── Layout: drawer takes the input panel out of flow ── */
  .module-layout-2col { grid-template-columns: 1fr; width: 100%; overflow: visible; }
  /* overflow:hidden clips wide card content that would push the strip/tab-bar off-screen;
     tab-bar's own overflow-x:auto still works because tab-bar box = content-col width */
  .content-col { display: block; width: 100%; overflow: hidden; }

  /* ── Drawing panels: horizontal swipe carousel ── */
  .drawings-row {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    height: 340px;
    padding: 0;
    gap: 0;
  }
  .drawings-row::-webkit-scrollbar { display: none; }
  .drawing-panel { flex: 0 0 100%; scroll-snap-align: start; }

  /* ── Dots indicator ── */
  .drawing-dots {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 5px 0 4px;
    background: var(--navy-800);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
  }
  .drawing-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--border-strong);
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
    transition: background 0.2s, width 0.2s, border-radius 0.2s;
  }
  .drawing-dot.active { background: var(--blueprint); width: 18px; border-radius: 3px; }

  /* ── Result strip: 3 cells per row ── */
  .result-strip { flex-wrap: wrap; }
  .result-cell  {
    flex: 0 0 33.333%;
    min-width: 0;
    border-bottom: 1px solid var(--border);
  }
  .result-cell:nth-child(3n)  { border-right: none; }
  .result-cell:nth-child(n+4) { border-bottom: none; }

  /* ── Tab bar: scrollable, no norm label ── */
  .tab-bar {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .tab-bar::-webkit-scrollbar { display: none; }
  .tab-norm { display: none; }

  /* ── Tab content cards: 2-per-row on tablet ── */
  .tab-content.active {
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.6rem;
  }
  .result-card {
    flex: 1 1 calc(50% - 0.3rem);
    min-width: 0;
    overflow: hidden;
  }
  .tab-content .rc-value {
    font-size: 0.92rem;
  }
}

/* ── Phone (≤600px): full-width cards, column label+value ── */
@media (max-width: 600px) {
  /* ── Header: hide back-link so brand + HR/EN fit without overflow ── */
  .back-link  { display: none; }
  .container  { padding: 0 0.75rem; }
  .header-row { padding-top: 0.6rem; padding-bottom: 0.6rem; }
  .site-nav   { gap: 0.4rem; }

  .drawings-row { height: 280px; }

  /* Settings modal: full-screen sheet on small phones */
  .settings-modal {
    width: 100%;
    height: 100vh; height: 100dvh;
    max-height: 100vh; max-height: 100dvh;
    border-radius: 0;
    border-left: none; border-right: none; border-top: none;
  }
  .settings-modal-head { padding: 0.6rem 0.75rem; }
  .settings-modal-head span { font-size: 0.82rem; }
  .settings-tab-content { padding: 0.75rem; }

  /* Tab bar: 2 rows of 3 — everything visible, no swipe guessing */
  .tab-bar {
    flex-wrap: wrap;
    overflow-x: visible;
    padding: 0;
  }
  .tab-btn {
    flex: 0 0 33.333%;
    padding: 0.45rem 0.4rem;
    font-size: 0.63rem;
    text-align: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
  }
  /* Active indicator stays on bottom of its own button */
  .tab-btn.active { border-bottom-color: var(--blueprint); border-bottom-width: 2px; }

  /* Settings tab bar: same 2-row layout */
  .settings-tab-bar {
    flex-wrap: wrap;
    overflow-x: visible;
  }
  .settings-tab-btn {
    flex: 0 0 33.333%;
    padding: 0.4rem 0.2rem;
    font-size: 0.6rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
  }
  .settings-tab-btn.active {
    border-bottom-color: var(--blueprint);
    border-bottom-width: 2px;
  }

  /* Settings footer: compact buttons so Teorija + Vrati defaulte + Primijeni fit */
  .settings-modal-foot {
    flex-wrap: wrap;
    padding: 0.5rem 0.75rem;
    gap: 0.4rem;
  }
  .settings-modal-foot .btn {
    padding: 0.35rem 0.7rem !important;
    font-size: 0.76rem !important;
  }

  /* Cards go full-width so label and value always fit */
  .result-card { flex: 1 1 100%; }

  /* Stack label above value inside every card row */
  .tab-content .result-card > div {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.05rem;
  }
  /* Keep rebar/stirrup picker rows horizontal (they use flex-wrap) */
  .tab-content .result-card > div[style*="flex-wrap"] {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.3rem;
  }
}

/* ── Very narrow phones (≤430px) ── */
@media (max-width: 430px) {
  .brand     { font-size: 1.05rem; }
  .site-nav  { gap: 0.35rem; }
  .drawings-row { height: 290px; }
}

.panel {
  background: var(--navy-800);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  position: sticky;
  top: 80px;
}
.panel h3 {
  font-size: 0.85rem;
  color: var(--blueprint-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

/* ─── Form elementi ─── */
.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}
.form-row label {
  font-size: 0.82rem;
  color: var(--text-dim);
}
.form-row label small {
  color: var(--text-faint);
  font-size: 0.75rem;
}
.form-row > div {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.form-row > div input {
  flex: 1;
  min-width: 0;
}
.form-row input,
.form-row select {
  padding: 0.5rem 0.7rem;
  background: var(--navy-900);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  width: 100%;
  transition: border-color var(--tr-fast);
}
.form-row input:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--blueprint);
  box-shadow: 0 0 0 2px rgba(var(--blueprint-rgb), 0.15);
}
.form-row .unit {
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ─── Result display ─── */
.result-box {
  padding: 1rem;
  background: var(--navy-900);
  border-left: 3px solid var(--blueprint);
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}
.result-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.result-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 0.25rem;
}
.result-value.ok { color: #58d68d; }
.result-value.warn { color: var(--accent-light); }
.result-value.bad { color: #ff5757; }

/* ─── Drawing canvas wrapper ─── */
.drawing-wrap {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  flex: 0 0 auto;
  height: min(380px, calc(100vh - 500px));
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ─── Utility ─── */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }
.hidden { display: none !important; }

/* ─── Settings Modal ─── */
.settings-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 600;
  align-items: center;
  justify-content: center;
}
.settings-overlay.open { display: flex; }

.settings-modal {
  background: var(--navy-800);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: min(600px, 95vw);
  max-height: 96vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.settings-modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 1.2rem 0.6rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.settings-modal-head span {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}
.settings-modal-head button {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: 0.1rem 0.3rem;
}

.settings-tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--navy-900);
  flex-shrink: 0;
  overflow-x: auto;
}
.settings-tab-btn {
  padding: 0.5rem 0.85rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.settings-tab-btn:hover { color: var(--text); }
.settings-tab-btn.active {
  color: var(--blueprint);
  border-bottom-color: var(--blueprint);
}

.settings-tab-content {
  display: none;
  padding: 1rem 1.2rem;
  overflow-y: auto;
  flex: 1;
}
.settings-tab-content.active { display: block; }

.settings-section-title {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--blueprint);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
  margin-bottom: 0.75rem;
  margin-top: 0.9rem;
}
.settings-section-title:first-child { margin-top: 0; }

.settings-coming {
  color: var(--text-faint);
  font-size: 0.82rem;
  font-style: italic;
  padding: 0.5rem 0;
}

.settings-modal-foot {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  padding: 0.75rem 1.2rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}