/* =============================================
   CODESQUAD SOLUTIONS — 3D Interactive Site
   Brand: Deep space black | Cyan | Violet | Green
   ============================================= */

:root {
  --bg:       #050510;
  --bg2:      #0a0a1a;
  --cyan:     #00D4FF;
  --violet:   #7B2FFF;
  --green:    #00FF88;
  --white:    #FFFFFF;
  --gray:     #8892A4;
  --gray2:    #4a5568;
  --border:   rgba(0, 212, 255, 0.15);
  --border2:  rgba(255, 255, 255, 0.06);
  --glow-c:   rgba(0, 212, 255, 0.25);
  --glow-v:   rgba(123, 47, 255, 0.25);
  --font-h:   'Sora', sans-serif;
  --font-b:   'Inter', sans-serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-b);
  overflow-x: hidden;
  height: 900vh;
}

/* =============================================
   LOADER
   ============================================= */
#loader {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease;
}

#loader.hidden {
  opacity: 0;
  pointer-events: none;
}

.loader-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.loader-logo {
  font-family: var(--font-h);
  font-size: 48px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -2px;
}

.loader-bar {
  width: 200px;
  height: 2px;
  background: var(--border2);
  border-radius: 2px;
  overflow: hidden;
}

.loader-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  border-radius: 2px;
  transition: width 0.1s linear;
}

.loader-text {
  font-size: 12px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gray);
}

/* =============================================
   CANVAS
   ============================================= */
#canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
}

/* =============================================
   SCROLL PROGRESS
   ============================================= */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--green));
  z-index: 200;
  transition: width 0.05s linear;
}

/* =============================================
   NAVIGATION
   ============================================= */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 56px;
  background: linear-gradient(to bottom, rgba(5,5,16,0.95) 0%, rgba(5,5,16,0) 100%);
  backdrop-filter: blur(8px);
}

.nav-logo {
  font-family: var(--font-h);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.logo-bracket { color: var(--cyan); }
.logo-text { color: var(--white); margin-left: 4px; letter-spacing: -0.5px; }

.nav-links {
  display: flex;
  gap: 36px;
}

.nav-links a {
  color: var(--gray);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: color 0.25s;
  cursor: pointer;
}

.nav-links a:hover,
.nav-links a.active { color: var(--cyan); }

.nav-cta {
  padding: 10px 24px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--cyan);
  font-family: var(--font-h);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.nav-cta:hover {
  background: rgba(0,212,255,0.08);
  border-color: var(--cyan);
  box-shadow: 0 0 20px var(--glow-c);
}

/* =============================================
   SECTION DOTS (right side)
   ============================================= */
#section-dots {
  position: fixed;
  right: 32px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 150;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
}

#section-dots .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gray2);
  cursor: pointer;
  transition: background 0.3s, transform 0.3s, height 0.3s, border-radius 0.3s;
}

#section-dots .dot.active {
  background: var(--cyan);
  height: 20px;
  border-radius: 3px;
  box-shadow: 0 0 10px var(--cyan);
}

/* =============================================
   SECTION LABEL
   ============================================= */
#section-label {
  position: fixed;
  right: 48px;
  bottom: 40px;
  z-index: 150;
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gray);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  opacity: 0.6;
}

/* =============================================
   SECTIONS UI OVERLAY
   ============================================= */
#sections-ui {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
}

.ui-section {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s ease;
}

.ui-section.active {
  opacity: 1;
  pointer-events: all;
}

.section-inner {
  padding: 0 56px;
  max-width: 640px;
  padding-top: 80px;
}

/* =============================================
   EYEBROW / TAG
   ============================================= */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 20px;
}

.dot-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.7); }
}

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1 {
  font-family: var(--font-h);
  font-size: clamp(40px, 5.5vw, 80px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2.5px;
  margin-bottom: 24px;
}

h2 {
  font-family: var(--font-h);
  font-size: clamp(28px, 3.5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
}

.grad-text {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--violet) 60%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-sub {
  font-size: 16px;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 500px;
}

/* =============================================
   HERO
   ============================================= */
.hero-inner { max-width: 700px; }

.hero-sub {
  font-size: 18px;
  color: var(--gray);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.btn-primary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  border: none;
  border-radius: 8px;
  color: var(--white);
  font-family: var(--font-h);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px var(--glow-c);
}

.btn-ghost {
  padding: 14px 32px;
  background: transparent;
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--white);
  font-family: var(--font-h);
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.3s, color 0.3s;
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.hero-scroll-hint {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray2);
  animation: fadeInUp 1s ease 2s both;
}

.scroll-arrow {
  width: 20px;
  height: 30px;
  border: 1px solid var(--gray2);
  border-radius: 10px;
  position: relative;
}

.scroll-arrow::after {
  content: '';
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 6px;
  background: var(--cyan);
  border-radius: 2px;
  animation: scrollDot 1.5s ease infinite;
}

@keyframes scrollDot {
  0%   { top: 5px; opacity: 1; }
  100% { top: 16px; opacity: 0; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =============================================
   SERVICES
   ============================================= */
.services-inner { max-width: 580px; }

.services-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.service-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  border: 1px solid var(--border2);
  border-radius: 10px;
  background: rgba(255,255,255,0.02);
  backdrop-filter: blur(12px);
  cursor: default;
  transition: border-color 0.3s, background 0.3s, transform 0.3s;
}

.service-item:hover,
.service-item.highlighted {
  border-color: var(--cyan);
  background: rgba(0,212,255,0.04);
  transform: translateX(6px);
}

.service-num {
  font-family: var(--font-h);
  font-size: 11px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 1px;
  min-width: 24px;
}

.service-body h3 {
  font-family: var(--font-h);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.service-body p {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.5;
}

.service-arrow {
  margin-left: auto;
  color: var(--cyan);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.3s, transform 0.3s;
}

.service-item:hover .service-arrow,
.service-item.highlighted .service-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* =============================================
   WORK / PROJECTS
   ============================================= */
.work-inner { max-width: 560px; }

.project-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.proj-prev, .proj-next {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--cyan);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s, box-shadow 0.25s;
}

.proj-prev:hover, .proj-next:hover {
  background: rgba(0,212,255,0.1);
  box-shadow: 0 0 15px var(--glow-c);
}

.project-dots-track {
  display: flex;
  gap: 8px;
  align-items: center;
}

.proj-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gray2);
  cursor: pointer;
  transition: background 0.25s, width 0.25s, border-radius 0.25s;
}

.proj-dot.active {
  width: 20px;
  border-radius: 3px;
  background: var(--cyan);
}

#project-card-info {
  display: flex;
  gap: 20px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(0,212,255,0.03);
  backdrop-filter: blur(16px);
  min-height: 180px;
  transition: opacity 0.3s;
}

.pci-number {
  font-family: var(--font-h);
  font-size: 56px;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  flex-shrink: 0;
  width: 60px;
}

.pci-body { flex: 1; }

.pci-body h3 {
  font-family: var(--font-h);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.pci-body p {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.65;
  margin-bottom: 14px;
}

.pci-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.pci-tags span {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--cyan);
  background: rgba(0,212,255,0.05);
}

.pci-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
  text-decoration: none;
  transition: gap 0.25s;
}

.pci-link:hover { gap: 10px; }

/* =============================================
   WHY CODESQUAD
   ============================================= */
.why-inner { max-width: 580px; }

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 30px;
}

.stat-box {
  padding: 24px;
  border: 1px solid var(--border2);
  border-radius: 12px;
  background: rgba(255,255,255,0.02);
  backdrop-filter: blur(12px);
  transition: border-color 0.3s;
}

.stat-box:hover { border-color: var(--border); }

.stat-val {
  font-family: var(--font-h);
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -2px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 13px;
  color: var(--gray);
  font-weight: 500;
}

.pillars {
  display: flex;
  gap: 16px;
}

.pillar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid var(--border2);
  border-radius: 8px;
  background: rgba(255,255,255,0.02);
  font-size: 13px;
  font-weight: 600;
  transition: border-color 0.3s, transform 0.3s;
}

.pillar:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.pillar-icon {
  color: var(--cyan);
  font-size: 18px;
}

/* =============================================
   CONTACT
   ============================================= */
.contact-inner { max-width: 560px; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-field {
  position: relative;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 16px 16px 8px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--white);
  font-family: var(--font-b);
  font-size: 14px;
  outline: none;
  transition: border-color 0.25s, background 0.25s;
  resize: none;
}

.form-field textarea { padding-top: 20px; }

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--cyan);
  background: rgba(0,212,255,0.04);
}

.form-field label {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--gray);
  pointer-events: none;
  transition: top 0.2s, font-size 0.2s, color 0.2s;
}

.form-field textarea ~ label { top: 20px; transform: none; }

.form-field input:focus ~ label,
.form-field input:not(:placeholder-shown) ~ label,
.form-field textarea:focus ~ label,
.form-field textarea:not(:placeholder-shown) ~ label {
  top: 6px;
  font-size: 10px;
  color: var(--cyan);
  transform: none;
  letter-spacing: 0.5px;
}

.send-btn {
  align-self: flex-start;
  margin-top: 6px;
}

/* =============================================
   FOOTER BAR
   ============================================= */
#footer-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 56px;
  font-size: 11px;
  color: var(--gray2);
  background: linear-gradient(to top, rgba(5,5,16,0.9), transparent);
  pointer-events: none;
}

.footer-sep { color: var(--border); }

/* =============================================
   GLITCH OVERLAY (section transitions)
   ============================================= */
#glitch-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.05), rgba(123,47,255,0.05));
}

/* =============================================
   SATELLITE HTML LABELS (screen-space projected)
   ============================================= */
.sat-label {
  position: fixed;
  z-index: 45;
  width: 240px;
  padding: 0;
  background: rgba(5, 5, 20, 0.90);
  border: 1px solid var(--accent, #00D4FF);
  border-radius: 10px;
  overflow: hidden;
  pointer-events: none;
  opacity: 0;
  backdrop-filter: blur(12px);
  transition: opacity 0.35s ease, transform 0.35s ease, box-shadow 0.3s ease;
  will-change: transform, opacity, left, top;
}

.sl-top-bar {
  height: 2px;
  background: linear-gradient(90deg, var(--accent, #00D4FF), transparent);
}

.sl-name {
  font-family: var(--font-h);
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  padding: 10px 14px 2px;
  letter-spacing: -0.3px;
}

.sl-client {
  font-size: 11px;
  color: var(--gray);
  padding: 0 14px 8px;
  line-height: 1.4;
}

.sl-divider {
  height: 1px;
  background: rgba(255,255,255,0.06);
  margin: 0 14px;
}

.sl-tags {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  padding: 8px 14px;
}

.sl-tags span {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 10px;
  border: 1px solid var(--accent, #00D4FF);
  color: var(--accent, #00D4FF);
}

.sl-url {
  font-size: 10px;
  color: var(--gray2);
  padding: 0 14px 6px;
  font-family: monospace;
  opacity: 0.7;
}

.sl-link {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent, #00D4FF);
  text-decoration: none;
  padding: 8px 14px 10px;
  border-top: 1px solid rgba(255,255,255,0.05);
  transition: letter-spacing 0.2s;
}

.sl-link:hover { letter-spacing: 0.4px; }

/* =============================================
   RESPONSIVE — MOBILE ONLY (≤768px)
   Desktop styles unchanged above this block
   ============================================= */
@media (max-width: 768px) {
  /* Nav */
  #nav { padding: 12px 18px; }
  .nav-links { display: none; }
  .nav-cta { padding: 7px 14px; font-size: 11px; }

  /* Layout — push content to bottom on mobile */
  .ui-section { align-items: flex-end; }
  .section-inner { padding: 0 18px 70px; padding-top: 0; }
  .hero-inner, .services-inner, .work-inner,
  .why-inner, .contact-inner { max-width: 100%; }

  /* Typography */
  h1 {
    font-size: clamp(24px, 7.5vw, 34px);
    letter-spacing: -1px;
    margin-bottom: 12px;
  }
  h2 {
    font-size: clamp(19px, 5.5vw, 26px);
    letter-spacing: -0.5px;
    margin-bottom: 10px;
  }
  .eyebrow { font-size: 9px; letter-spacing: 2px; margin-bottom: 12px; }
  .hero-sub { font-size: 13px; line-height: 1.6; margin-bottom: 22px; }
  .section-sub { font-size: 12px; line-height: 1.6; margin-bottom: 18px; }

  /* Hero */
  .hero-actions { gap: 10px; margin-bottom: 24px; flex-wrap: wrap; }
  .btn-primary, .btn-ghost { padding: 10px 18px; font-size: 12px; }
  .hero-scroll-hint { font-size: 9px; gap: 10px; }
  .scroll-arrow { width: 16px; height: 24px; }

  /* Services */
  .service-item { padding: 12px 14px; gap: 10px; }
  .service-body h3 { font-size: 13px; }
  .service-body p { font-size: 11px; }
  .service-num { font-size: 9px; min-width: 18px; }

  /* Why CodeSquad */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
  .stat-box { padding: 14px 12px; }
  .stat-val { font-size: 28px; letter-spacing: -1px; margin-bottom: 4px; }
  .stat-label { font-size: 10px; }
  .pillars { flex-wrap: wrap; gap: 8px; }
  .pillar { padding: 8px 12px; font-size: 11px; gap: 6px; }
  .pillar-icon { font-size: 14px; }

  /* Contact */
  .form-row { grid-template-columns: 1fr; }
  .form-field input,
  .form-field textarea { font-size: 13px; padding: 14px 14px 6px; }

  /* Footer */
  #footer-bar { padding: 10px 18px; font-size: 10px; gap: 8px; }

  /* Hide desktop nav chrome */
  #section-dots { display: none; }
  #section-label { display: none; }

  /* Hide static project card & nav — rocket labels show project info on mobile */
  .project-nav { display: none; }
  #project-card-info { display: none; }

  /* Satellite project labels — compact on mobile */
  .sat-label { width: 175px; }
  .sl-name { font-size: 12px; padding: 8px 11px 2px; }
  .sl-client { font-size: 10px; padding: 0 11px 6px; }
  .sl-tags { padding: 5px 11px; gap: 4px; }
  .sl-tags span { font-size: 8px; padding: 2px 6px; }
  .sl-url { font-size: 9px; padding: 0 11px 4px; }
  .sl-link { font-size: 10px; padding: 6px 11px 8px; }
}

/* =============================================
   UTILITY ANIMATIONS
   ============================================= */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ui-section.active .eyebrow   { animation: fadeIn 0.5s ease 0.0s both; }
.ui-section.active h1,
.ui-section.active h2          { animation: fadeIn 0.5s ease 0.1s both; }
.ui-section.active .hero-sub,
.ui-section.active .section-sub { animation: fadeIn 0.5s ease 0.2s both; }
.ui-section.active .hero-actions,
.ui-section.active .services-list,
.ui-section.active #project-card-info,
.ui-section.active .stats-grid,
.ui-section.active .contact-form { animation: fadeIn 0.5s ease 0.3s both; }
.ui-section.active .hero-scroll-hint,
.ui-section.active .pillars    { animation: fadeIn 0.5s ease 0.45s both; }