/* ==========================================================================
   PPT Finder & Live Presentation Suite - Website Stylesheet (v2.0)
   Matches the exact visual design of PPT Server Pro (ppt_server.py)
   ========================================================================== */

:root {
  --bg-dark: #07070c;
  --bg-panel: #0d0d16;
  --bg-card: #131322;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 229, 255, 0.35);
  --primary: #00e5ff;
  --primary-glow: rgba(0, 229, 255, 0.15);
  --secondary: #6366f1;
  --gradient-accent: linear-gradient(135deg, var(--primary), var(--secondary));
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dark: #6b7280;
  --font-title: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Real PPT Server Color Scheme */
  --ink: #f4f1ff;
  --muted: #b5b1c2;
  --paper: #11111a;
  --surface: #1a1925;
  --line: #353342;
  --violet: #a89dff;
  --violet-dark: #c5beff;
  --violet-soft: #292641;
  --gold: #f0bd60;
  --green: #54b982;
  --danger: #dc5664;
}

/* Bilingual display rules */
[data-lang="en"] { display: none !important; }
html[lang="en"] [data-lang="en"] { display: block !important; }
html[lang="en"] [data-lang="ro"] { display: none !important; }

html[lang="en"] span[data-lang="en"],
html[lang="en"] strong[data-lang="en"],
html[lang="en"] a[data-lang="en"],
html[lang="en"] code[data-lang="en"] {
  display: inline !important;
}

* {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 45%),
    radial-gradient(at 100% 100%, rgba(0, 229, 255, 0.06) 0px, transparent 45%);
  background-attachment: fixed;
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   Header & Navbar
   -------------------------------------------------------------------------- */
header.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background-color: rgba(7, 7, 12, 0.75);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  font-size: 24px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  font-family: var(--font-title);
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.5px;
  font-family: var(--font-title);
}

.logo-badge {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  background: rgba(0, 229, 255, 0.15);
  color: var(--primary);
  border: 1px solid rgba(0, 229, 255, 0.3);
  padding: 2px 7px;
  border-radius: 99px;
  letter-spacing: 0.5px;
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

nav.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

nav.main-nav a:hover {
  color: var(--primary);
}

.lang-switcher {
  display: flex;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn.active {
  background: var(--primary);
  color: #000;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding: 160px 0 60px 0;
  text-align: center;
  position: relative;
}

.badge-network {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 99px;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 600;
  color: #a5b4fc;
  margin-bottom: 25px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary);
  animation: pulseAnim 2s infinite;
}

@keyframes pulseAnim {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero h1 {
  font-family: var(--font-title);
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  margin: 0 0 20px 0;
  letter-spacing: -1.5px;
  background: linear-gradient(135deg, #ffffff 45%, #a5b4fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero h1 span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  max-width: 760px;
  margin: 0 auto 35px auto;
  font-size: 18px;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #000;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
}

.btn-primary:hover {
  opacity: 0.92;
  box-shadow: 0 8px 24px rgba(0, 229, 255, 0.3);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

.experimental-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
}

.experimental-toggle input {
  position: absolute;
  opacity: 0;
}

.toggle-track {
  width: 42px;
  height: 24px;
  padding: 3px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.toggle-track::after {
  content: '';
  display: block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform 0.2s ease, background 0.2s ease;
}

.experimental-toggle input:checked + .toggle-track {
  background: rgba(0, 229, 255, 0.18);
  border-color: var(--primary);
}

.experimental-toggle input:checked + .toggle-track::after {
  transform: translateX(18px);
  background: var(--primary);
}

/* --------------------------------------------------------------------------
   Simulator Section Container
   -------------------------------------------------------------------------- */
.simulator-section {
  padding: 70px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 45px;
}

.section-title h2 {
  font-family: var(--font-title);
  font-size: 36px;
  font-weight: 800;
  margin: 0 0 10px 0;
  letter-spacing: -1px;
}

.section-title p {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 700px;
  margin: 0 auto;
}

.sim-container {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.65);
  display: grid;
  grid-template-columns: 1.75fr 1fr;
  gap: 24px;
}

/* --------------------------------------------------------------------------
   AUTHENTIC PPT_SERVER.PY OPERATOR CONSOLE DESIGN
   -------------------------------------------------------------------------- */
.sim-console-window {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  height: 720px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 16px 40px rgba(0,0,0,0.4);
}

/* Window Frame Top Bar */
.sim-win-bar {
  background: #191826;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.win-buttons {
  display: flex;
  gap: 7px;
}

.win-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.win-dot.close { background: #ff5f56; }
.win-dot.min { background: #ffbd2e; }
.win-dot.max { background: #27c93f; }

.sim-win-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.5px;
  font-family: 'Inter', sans-serif;
}

/* Real App Header */
.app-header {
  padding: 12px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.app-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-logo-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--violet);
  box-shadow: 0 4px 14px rgba(168, 157, 255, 0.3);
  font-size: 17px;
}

.app-logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.4px;
}

.app-logo-text small {
  margin-left: 5px;
  padding: 2px 6px;
  border-radius: 12px;
  background: var(--violet-soft);
  color: var(--violet);
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.app-header-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.app-nav-btn {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 10px;
  background: var(--surface);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.2s ease;
}

.app-nav-btn:hover {
  border-color: var(--violet);
  background: #232133;
}

/* Real Search Section */
.app-search-section {
  padding: 14px 18px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.app-search-intro {
  margin-bottom: 8px;
}

.app-eyebrow {
  color: var(--violet);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

.app-search-intro h2 {
  margin: 3px 0 2px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.5px;
}

.app-search-intro p {
  margin: 0;
  font-size: 11px;
  color: var(--muted);
}

.app-search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  border: 1px solid #353342;
  border-radius: 12px;
  background: #15141e;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.app-search-box input {
  width: 100%;
  border: 0;
  outline: none;
  background: none;
  color: var(--ink);
  font-size: 13px;
  font-family: inherit;
}

.app-search-box input::placeholder {
  color: #727085;
}

.app-clear-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  cursor: pointer;
  padding: 0 4px;
}

.app-search-help {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 10px;
}

/* Results Multi-Column Grid matching real app */
.app-results-container {
  display: grid;
  grid-template-columns: 1.08fr 0.96fr 0.96fr;
  gap: 12px;
  padding: 14px;
  flex: 1;
  overflow-y: auto;
  background: var(--paper);
}

.app-results-column {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.app-results-column:nth-child(1) { border-top: 3px solid var(--violet); }
.app-results-column:nth-child(2) { border-top: 3px solid var(--gold); }
.app-results-column:nth-child(3) { border-top: 3px solid #6fae8e; }

.app-col-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  background: #1d1c29;
}

.app-col-title {
  display: flex;
  align-items: center;
  gap: 7px;
}

.app-col-icon {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: var(--violet-soft);
  font-size: 12px;
}

.app-results-column:nth-child(2) .app-col-icon { background: #332919; }
.app-results-column:nth-child(3) .app-col-icon { background: #193629; }

.app-col-title h3 {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
}

.app-badge {
  padding: 2px 6px;
  border-radius: 6px;
  background: #292735;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
}

.app-results-list {
  padding: 8px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Card in Results */
.app-card {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #1d1c29;
  cursor: pointer;
  transition: all 0.2s ease;
}

.app-card:hover {
  border-color: #554f73;
  background: #242230;
}

.app-card.selected {
  border-color: var(--violet);
  background: var(--violet-soft);
  box-shadow: 0 0 0 2px rgba(168, 157, 255, 0.25);
}

.app-card h4 {
  margin: 0 0 3px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.app-card-path {
  font-size: 9px;
  color: var(--violet);
  font-family: monospace;
  margin-bottom: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-card p {
  margin: 4px 0 8px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
  max-height: 48px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.2);
  padding: 5px 7px;
  border-radius: 5px;
}

.app-card mark {
  padding: 0 2px;
  border-radius: 3px;
  background: rgba(168, 157, 255, 0.25);
  color: var(--ink);
}

.app-card-actions {
  display: flex;
  gap: 5px;
}

.app-btn {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
  background: var(--surface);
  color: var(--ink);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
}

.app-btn:hover {
  transform: translateY(-1px);
}

.app-btn-primary {
  border-color: var(--violet);
  background: var(--violet);
  color: #11111a;
}

.app-btn-primary:hover {
  background: var(--violet-dark);
}

/* Projection Drawer & Workspace (Real 3-Panel Workspace) */
.app-projection-drawer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 -8px 25px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
}

.app-drawer-header {
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: #1d1c29;
}

.app-drawer-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(84, 185, 130, 0.25);
}

.app-drawer-info h3 {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.app-drawer-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.app-btn-outline {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}

.app-btn-outline.is-active {
  background: #493b16;
  color: #ffd270;
  border-color: #8c732c;
}

.app-btn-danger {
  border-color: #693b42;
  background: #352024;
  color: #f4a8af;
}

.app-font-stepper {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 10px;
  color: var(--muted);
}

.app-stepper-btn {
  border: 0;
  background: var(--violet-soft);
  color: var(--violet);
  border-radius: 4px;
  width: 18px;
  height: 18px;
  font-weight: 800;
  cursor: pointer;
  display: grid;
  place-items: center;
}

/* 3-Panel Operator Workspace */
.app-operator-workspace {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.8fr;
  gap: 10px;
  padding: 10px 14px;
  background: #11111a;
}

.app-preview-panel {
  border-radius: 9px;
  border: 1px solid #333846;
  background: #080a11;
  color: #f7f8ff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.app-current-preview {
  border: 2px solid #27885d;
}

.app-next-preview {
  border-color: #697286;
  background: #181d28;
}

.app-preview-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.8px;
}

.app-current-preview .app-preview-heading span { color: #92e1b5; }
.app-next-preview .app-preview-heading span { color: #afc5ff; }

.app-slide-preview-text {
  padding: 10px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  white-space: pre-wrap;
  min-height: 80px;
  max-height: 95px;
  overflow-y: auto;
  line-height: 1.35;
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-slide-list-panel {
  display: flex;
  flex-direction: column;
  max-height: 120px;
}

.app-slide-list-panel h4 {
  margin: 0 0 5px;
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.app-slides-grid {
  display: flex;
  flex-direction: column;
  gap: 5px;
  overflow-y: auto;
  flex: 1;
}

.app-slide-item {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  font-size: 10px;
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-slide-item:hover, .app-slide-item.active {
  border-color: var(--violet);
  background: var(--violet-soft);
}

.app-slide-item.active {
  border-color: #27885d;
}

/* Slide Navigation Bar */
.app-slide-navigation {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.app-slide-counter {
  font-weight: 800;
  color: var(--violet);
  font-size: 12px;
  min-width: 45px;
  text-align: center;
}

.app-shortcut-help {
  margin-left: auto;
  font-size: 10px;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   SIMULATED PROJECTOR DISPLAY (Right Column)
   -------------------------------------------------------------------------- */
.sim-projector-view {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.proj-screen {
  background: #000;
  border: 6px solid #1c1c28;
  border-radius: 12px;
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  color: #ffffff;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.6);
  position: relative;
  transition: all 0.25s ease;
}

.proj-screen.blackout {
  background: #000 !important;
  color: transparent !important;
}

.proj-screen.hidden-text span {
  opacity: 0 !important;
}

.proj-screen-tag {
  position: absolute;
  top: 10px;
  right: 12px;
  font-size: 9px;
  font-weight: 800;
  color: var(--primary);
  background: rgba(0, 229, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.proj-instructions {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 18px;
}

.proj-instructions h4 {
  margin: 0 0 8px 0;
  font-size: 14px;
  color: var(--primary);
}

.proj-instructions p {
  margin: 0;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Modal Simulation inside Console */
.app-modal {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(5px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.app-modal.active {
  display: flex;
}

.app-modal-content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
}

.app-modal-close {
  position: absolute;
  top: 10px;
  right: 14px;
  background: transparent;
  border: 0;
  color: var(--muted);
  font-size: 20px;
  cursor: pointer;
}

.app-qr-box {
  width: 140px;
  height: 140px;
  margin: 14px auto;
  background: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: #000;
  font-weight: 800;
}

/* --------------------------------------------------------------------------
   How It Works, Features, Guide, FAQs & Footer
   -------------------------------------------------------------------------- */
.how-it-works {
  padding: 70px 0;
  background: rgba(255, 255, 255, 0.01);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.step-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 30px 24px;
  position: relative;
  transition: all 0.3s ease;
}

.step-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
}

.step-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.step-card h3 {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px 0;
}

.step-card p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.features {
  padding: 70px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 30px;
  transition: all 0.3s;
}

.feature-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 12px 30px rgba(0, 229, 255, 0.05);
}

.feat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 229, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 22px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 10px 0;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.guide-section {
  padding: 70px 0;
  background: rgba(255, 255, 255, 0.01);
  border-top: 1px solid var(--border-color);
}

.guide-wrapper {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
}

.tabs-header {
  display: flex;
  gap: 10px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
  margin-bottom: 25px;
}

.tab-pill {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-pill.active {
  background: rgba(99, 102, 241, 0.12);
  border-color: var(--secondary);
  color: var(--text-main);
}

.tab-body {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 30px;
  min-height: 250px;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-content h3 {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px 0;
}

.tab-content p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0 0 15px 0;
}

.code-block {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 15px;
  font-family: Consolas, Monaco, monospace;
  font-size: 13px;
  color: #818cf8;
  overflow-x: auto;
  margin: 0 0 15px 0;
}

.faq-section {
  padding: 70px 0;
  border-top: 1px solid var(--border-color);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.faq-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow: hidden;
}

.faq-question {
  padding: 20px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question svg {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: rgba(0, 0, 0, 0.15);
}

.faq-answer-content {
  padding: 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.55;
}

.faq-item.active {
  border-color: var(--border-hover);
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-item.active .faq-answer {
  border-top: 1px solid var(--border-color);
}

footer.site-footer {
  background: #040408;
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
  margin-top: 80px;
}

footer.site-footer p {
  font-size: 13px;
  color: var(--text-dark);
  margin: 0;
}

footer .footer-logo {
  margin-bottom: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

footer .footer-logo span {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 968px) {
  .sim-container {
    grid-template-columns: 1fr;
  }
  .guide-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .nav-container {
    height: auto;
    min-height: 70px;
    padding-top: 10px;
    padding-bottom: 10px;
    flex-wrap: wrap;
    gap: 10px 20px;
  }

  nav.main-nav {
    order: 3;
    width: 100%;
    gap: 20px;
    padding-bottom: 2px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  nav.main-nav::-webkit-scrollbar { display: none; }
  nav.main-nav a { white-space: nowrap; }

  .hero { padding-top: 190px; }
  .simulator-section, .how-it-works, .features, .guide-section, .faq-section { padding: 48px 0; }
}

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .logo-text { font-size: 18px; }
  nav.main-nav { gap: 16px; }
  nav.main-nav a { font-size: 13px; }
  .lang-btn { min-height: 34px; padding: 5px 10px; }

  .hero { padding: 174px 0 42px; }
  .badge-network { margin-bottom: 18px; }
  .hero h1 { font-size: clamp(32px, 10vw, 42px); letter-spacing: -1px; }
  .hero p { font-size: 16px; margin-bottom: 28px; }
  .hero-actions { gap: 12px; }
  .hero-actions a { width: 100%; justify-content: center; }

  .section-title { margin-bottom: 30px; }
  .section-title h2 { font-size: 28px; }
  .sim-container { padding: 12px; border-radius: 14px; gap: 20px; }
  .app-results-container { grid-template-columns: 1fr; }
  .app-operator-workspace { grid-template-columns: 1fr; }
  .sim-console-window { height: 680px !important; }
  .proj-screen { font-size: 15px; padding: 14px; }
  .step-card, .feature-card { padding: 24px 20px; }
  .faq-question, .faq-answer-content { padding: 16px; }
  footer.site-footer { margin-top: 48px; }
}