/* =============================================
   BASE & UTILITIES
   ============================================= */
:root {
  --primary: #ff6b6b;
  --primary-dark: #e85d5d;
  --accent: #2ec4b6;
  --dark: #1e293b;
  --text: #0f172a;
  --muted: #64748b;
  --bg-light: #fff4e6;
  --radius: 16px;
  --shadow: 4px 4px 0px #1e293b;
  --shadow-lg: 8px 8px 0px #1e293b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family:
    "Nunito", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial,
    sans-serif;
  color: var(--text);
  background: #fff;
  overflow-x: hidden;
}

.py-6 {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

@media (max-width: 768px) {
  .py-6 {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
}

/* =============================================
   NAVBAR
   ============================================= */
#mainNav {
  background: transparent;
  transition:
    background 0.3s,
    box-shadow 0.3s;
  padding: 1rem 0;
}

#mainNav.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  padding: 0.6rem 0;
}

.navbar-brand {
  font-size: 1.3rem;
  letter-spacing: -0.5px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

/* =============================================
   HERO
   ============================================= */
.hero {
  min-height: 100vh;
  position: relative;
  background: var(--bg-light);
  color: var(--dark);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%23ffffff' fill-opacity='0.6' d='M0,160L48,176C96,192,192,224,288,213.3C384,203,480,149,576,138.7C672,128,768,160,864,186.7C960,213,1056,235,1152,218.7C1248,203,1344,149,1392,122.7L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E")
    bottom/cover no-repeat;
  pointer-events: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23000000' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.text-gradient {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.fw-black {
  font-weight: 900;
}

.stat-card {
  background: #fff;
  border: 2px solid var(--dark);
  box-shadow: var(--shadow);
  color: var(--dark);
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--dark);
  font-size: 1.4rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(10px);
  }
}

/* =============================================
   BUTTONS & BADGES (Neo-brutalism)
   ============================================= */
.btn-primary {
  background-color: var(--primary);
  border: 2px solid var(--dark);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 6px 0 var(--primary-dark);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-primary:hover {
  background-color: var(--primary);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 var(--primary-dark);
}

.btn-outline-dark {
  background-color: #fff;
  border: 2px solid var(--dark);
  color: var(--dark);
  font-weight: 800;
  box-shadow: 0 6px 0 var(--dark);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-outline-dark:hover {
  background-color: #f8f9fa;
  color: var(--dark);
}

.btn-outline-dark:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 var(--dark);
}

.badge-vibrant {
  background-color: #fed330;
  color: var(--dark);
  border: 2px solid var(--dark);
  box-shadow: 2px 2px 0 var(--dark);
  font-weight: 800;
}

/* =============================================
   SECTION LABELS & TITLES
   ============================================= */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(79, 99, 255, 0.08);
  border: 1px solid rgba(79, 99, 255, 0.2);
  padding: 0.3rem 1rem;
  border-radius: 99px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--dark);
  margin-bottom: 1.2rem;
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

.section-title.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.6s 0.15s ease,
    transform 0.6s 0.15s ease;
}

.section-desc.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   LAB SECTION
   ============================================= */
.section-lab {
  background: var(--bg-light);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
}

.feature-list li {
  padding: 0.5rem 0;
  font-size: 0.97rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

/* Browser Mockup */
.browser-mockup {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 3px solid var(--dark);
}

.browser-bar {
  background: #e8ecf0;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.browser-bar span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fc5c65;
}

.browser-bar span:nth-child(2) {
  background: #fed330;
}
.browser-bar span:nth-child(3) {
  background: #26de81;
}

.browser-url {
  background: #fff;
  border-radius: 6px;
  padding: 0.2rem 0.8rem;
  font-size: 0.78rem;
  color: #64748b;
  flex: 1;
  max-width: 280px;
}

.browser-body {
  background: #fff;
}

.code-editor {
  display: flex;
  min-height: 260px;
}

.editor-sidebar {
  background: #f8f9fa;
  width: 140px;
  padding: 1rem 0;
  flex-shrink: 0;
}

.file-item {
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  color: var(--dark);
  cursor: pointer;
  transition: background 0.2s;
}

.file-item.active {
  background: var(--primary);
  color: #fff;
}

.editor-main {
  padding: 1rem 1.2rem;
  flex: 1;
  font-family: "Fira Code", "Courier New", monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--dark);
}

.code-line {
  white-space: pre;
}
.kw {
  color: #9333ea;
}
.mod {
  color: #2563eb;
}
.fn {
  color: #ea580c;
}
.dec {
  color: #16a34a;
}
.str {
  color: #16a34a;
}

.cursor {
  animation: blink 1s steps(1) infinite;
  color: #4f63ff;
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

/* =============================================
   DUAL SCREEN SECTION
   ============================================= */
.dual-screen-demo {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  position: relative;
}

.screen {
  flex: 1;
  border-radius: 24px;
  overflow: hidden;
  border: 3px solid var(--dark);
  box-shadow: var(--shadow-lg);
}

.screen-right {
  flex: 1.4;
}

.screen-label {
  background: var(--dark);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  padding: 0.6rem;
  letter-spacing: 0.5px;
  border-bottom: 3px solid var(--dark);
}

.screen-inner {
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.2rem;
  position: relative;
}

.video-screen {
  background: #ffd166;
}

.play-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  border: 3px solid var(--dark);
  box-shadow: 4px 4px 0px var(--dark);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.play-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--dark);
}

.progress-bar-demo {
  width: 100%;
}
.progress-track {
  height: 12px;
  background: #fff;
  border: 2px solid var(--dark);
  border-radius: 10px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 45%;
  background: var(--primary);
  border-right: 2px solid var(--dark);
}

.editor-screen {
  background: #fff;
  align-items: flex-start;
  justify-content: flex-start;
}

.mini-code {
  font-family: "Fira Code", monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  width: 100%;
  font-weight: 600;
  color: var(--dark);
}
.mc-line {
  white-space: pre;
}
.mc-purple {
  color: #9d4edd;
}
.mc-blue {
  color: #0077b6;
}
.mc-green {
  color: #2a9d8f;
}

.mini-feature-card {
  background: #fff;
  border: 2px solid var(--dark);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  box-shadow: 4px 4px 0 var(--dark);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  opacity: 0;
  transform: translateY(16px);
}

.mini-feature-card:hover {
  box-shadow: 8px 8px 0 var(--dark);
  transform: translateY(-4px) !important;
}

.mini-feature-card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   FEATURES CARDS
   ============================================= */
.section-features {
  background: #fff;
}

.feature-card {
  background: #fff;
  border: 3px solid var(--dark);
  border-radius: 24px;
  padding: 2rem;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  opacity: 0;
  transform: translateY(24px);
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 0 var(--dark);
}

.feature-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-card:hover,
.feature-card.visible:hover {
  box-shadow: 0 6px 0 var(--dark);
  transform: translateY(6px);
}

.feature-card.featured {
  background: var(--primary);
  color: var(--dark);
  border: 3px solid var(--dark);
  box-shadow: 0 12px 0 var(--dark);
}

.feature-card.featured:hover {
  box-shadow: 0 6px 0 var(--dark);
  transform: translateY(6px);
}

.feature-card.featured .feature-badge {
  color: var(--dark);
  background: #fff;
}

.feature-card.featured .feature-icon {
  background: #fff;
}

.feature-card.featured .feature-icon i {
  color: var(--dark) !important;
}

.feature-card.featured .badge {
  color: var(--dark) !important;
  border: 2px solid var(--dark);
}

.feature-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  border-radius: 99px;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 2px solid var(--dark);
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--dark);
  box-shadow: 0 4px 0 var(--dark);
}

.bg-primary-soft {
  background: rgba(79, 99, 255, 0.1);
}
.bg-success-soft {
  background: rgba(38, 222, 129, 0.1);
}
.bg-white-soft {
  background: rgba(255, 255, 255, 0.2);
}

.text-success {
  color: #26de81 !important;
}

.feature-tag {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section {
  background: #ffd166;
  position: relative;
  overflow: hidden;
  color: var(--dark);
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23000000' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.cta-section .btn-light {
  background-color: #fff;
  border: 2px solid var(--dark);
  color: var(--dark);
  font-weight: 800;
  box-shadow: 0 6px 0 var(--dark);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.cta-section .btn-light:hover {
  background-color: #f8f9fa;
  transform: translateY(-2px);
  box-shadow: 0 8px 0 var(--dark);
}

.cta-section .btn-light:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 var(--dark);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: #f8f9fa;
  color: var(--dark);
  font-size: 0.88rem;
  border-top: 3px solid var(--dark);
}

.footer-brand {
  color: var(--dark);
  font-weight: 700;
  font-size: 1rem;
}

.footer-link {
  color: var(--dark);
  text-decoration: none;
  transition: color 0.2s;
  font-weight: 600;
}

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

/* =============================================
   RESPONSIVE TWEAKS
   ============================================= */
@media (max-width: 575px) {
  .dual-screen-demo {
    flex-direction: column;
  }
  .screen-right {
    flex: unset;
  }
  .display-3 {
    font-size: 2.2rem;
  }
  .editor-sidebar {
    display: none;
  }
}

@media (max-width: 991px) {
  .hero {
    min-height: auto;
    padding: 8rem 0 4rem;
  }
}