/* ============================================
   Global Data Learning Lab - Landing Page
   Color Palette:
     Primary:   #1A535C (Malachite Teal)
     Accent:    #B08B59 (Gold)
     Dark:      #2D2D2D
   Font: Noto Serif KR
   ============================================ */

:root {
  --c-primary: #1A535C;
  --c-primary-light: #24717d;
  --c-primary-dark: #123a41;
  --c-accent: #B08B59;
  --c-accent-light: #c9a56f;
  --c-accent-dark: #8e6f44;
  --c-dark: #2D2D2D;
  --c-dark-light: #3d3d3d;
  --c-text: #e8e4df;
  --c-text-muted: #a09a92;
  --c-bg: #111111;
  --c-bg-card: #1a1a1a;
  --c-bg-card-hover: #222222;
  --c-border: rgba(176, 139, 89, 0.15);
  --font-main: 'Noto Serif KR', serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-main);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

img {
  max-width: 100%;
}

button {
  cursor: pointer;
  font-family: var(--font-main);
  border: none;
  outline: none;
  background: none;
}

ul {
  list-style: none;
}

.hide-mobile {
  display: inline;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-icon {
  width: 18px;
  height: 18px;
  margin-right: 8px;
  vertical-align: middle;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-dark));
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 60px;
  letter-spacing: 0.5px;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(176, 139, 89, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(176, 139, 89, 0.45);
  background: linear-gradient(135deg, var(--c-accent-light), var(--c-accent));
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  background: transparent;
  color: var(--c-text);
  font-size: 16px;
  font-weight: 500;
  border-radius: 60px;
  border: 1px solid rgba(176, 139, 89, 0.4);
  letter-spacing: 0.5px;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(176, 139, 89, 0.1);
  border-color: var(--c-accent);
  transform: translateY(-2px);
}

.btn-secondary .btn-icon {
  filter: brightness(0) invert(0.85);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(170deg, #0a1f22 0%, #0d2b30 30%, #112025 60%, #0a1a1d 100%);
}

.hero-bg-image {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.hero-bg-particles {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(26, 83, 92, 0.15) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 30%, rgba(176, 139, 89, 0.08) 0%, transparent 60%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 120px 24px 100px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(176, 139, 89, 0.12);
  border: 1px solid rgba(176, 139, 89, 0.25);
  border-radius: 40px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 40px;
}

.hero-badge i {
  font-size: 14px;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 80px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 28px;
}

.hero-line1 {
  display: block;
  color: var(--c-text);
  opacity: 0;
  animation: heroFadeSlide 0.8s ease forwards 0.3s;
}

.hero-line2 {
  display: block;
  background: linear-gradient(135deg, var(--c-accent-light), var(--c-accent), var(--c-accent-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  animation: heroFadeSlide 0.8s ease forwards 0.6s;
}

@keyframes heroFadeSlide {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-sub {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--c-text-muted);
  line-height: 1.8;
  margin-bottom: 48px;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-disclaimer {
  font-size: 13px;
  color: var(--c-text-muted);
  opacity: 0.6;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--c-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

.hero-scroll-indicator span {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--c-text-muted);
  opacity: 0.5;
}

/* ============================================
   SECTION COMMON
   ============================================ */
.section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.label-line {
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--c-accent);
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--c-text-muted);
  line-height: 1.8;
  max-width: 600px;
}

/* ============================================
   INTRO / FEATURES
   ============================================ */
.section-intro {
  padding: 120px 0;
  background: var(--c-bg);
}

.section-intro .section-title,
.section-intro .section-desc {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-intro .section-label {
  justify-content: center;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.feature-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 40px 28px;
  text-align: center;
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--c-bg-card-hover);
  border-color: rgba(176, 139, 89, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 83, 92, 0.15);
  border-radius: 16px;
  color: var(--c-primary-light);
  font-size: 24px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: rgba(26, 83, 92, 0.25);
  color: #4ec3d1;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--c-text);
}

.feature-card p {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

/* ============================================
   SPLIT LAYOUT (Left-Right Sections)
   ============================================ */
.section-framework,
.section-community {
  padding: 120px 0;
}

.section-framework {
  background: linear-gradient(180deg, var(--c-bg) 0%, #0d1b1e 100%);
}

.section-community {
  background: linear-gradient(180deg, #0d1b1e 0%, var(--c-bg) 100%);
}

.split-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.split-text .section-desc {
  margin-bottom: 32px;
}

/* Framework Visual */
.framework-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 40px 30px;
  background: rgba(26, 83, 92, 0.06);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.framework-img {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: var(--radius);
  opacity: 0.85;
  transition: var(--transition);
}

.framework-visual:hover .framework-img {
  opacity: 1;
}

.fw-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.fw-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 24px 20px;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text);
  transition: var(--transition);
  min-width: 100px;
  text-align: center;
}

.fw-node i {
  font-size: 28px;
}

.fw-node-1 i { color: var(--c-text-muted); }
.fw-node-2 i { color: var(--c-primary-light); }
.fw-node-3 i { color: var(--c-accent); }

.fw-node:hover {
  transform: translateY(-4px);
  border-color: rgba(176, 139, 89, 0.3);
}

.fw-arrow {
  color: var(--c-accent);
  font-size: 18px;
  opacity: 0.4;
  animation: arrowPulse 2s ease infinite;
}

@keyframes arrowPulse {
  0%, 100% { opacity: 0.3; transform: translateX(0); }
  50% { opacity: 0.8; transform: translateX(4px); }
}

/* Community Visual */
.community-visual {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 40px;
}

.comm-circle {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 28px;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.comm-circle:hover {
  background: var(--c-bg-card-hover);
  border-color: rgba(176, 139, 89, 0.3);
  transform: translateX(8px);
}

.comm-circle i {
  font-size: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  flex-shrink: 0;
}

.comm-circle-1 i {
  background: rgba(26, 83, 92, 0.15);
  color: var(--c-primary-light);
}

.comm-circle-2 i {
  background: rgba(176, 139, 89, 0.12);
  color: var(--c-accent);
}

.comm-circle-3 i {
  background: rgba(78, 195, 209, 0.1);
  color: #4ec3d1;
}

.comm-circle span {
  font-size: 16px;
  font-weight: 500;
  color: var(--c-text);
}

/* ============================================
   CORE MODULES
   ============================================ */
.section-modules {
  padding: 120px 0;
  background: var(--c-bg);
}

.section-modules .section-title {
  margin-bottom: 60px;
}

.module-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.module-row:last-child {
  margin-bottom: 0;
}

.module-row-reverse {
  direction: rtl;
}

.module-row-reverse > * {
  direction: ltr;
}

.module-image {
  display: flex;
  align-items: center;
  justify-content: center;
}

.module-image-inner {
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(26, 83, 92, 0.12), rgba(176, 139, 89, 0.08));
  border: 1px solid var(--c-border);
  border-radius: 50%;
  transition: var(--transition);
}

.module-image-inner i {
  font-size: 56px;
  color: var(--c-primary-light);
  transition: var(--transition);
}

.module-image-inner img {
  width: 75%;
  height: 75%;
  object-fit: contain;
  border-radius: 50%;
  transition: var(--transition);
}

.module-row:hover .module-image-inner {
  border-color: rgba(176, 139, 89, 0.3);
  box-shadow: 0 0 60px rgba(26, 83, 92, 0.15);
}

.module-row:hover .module-image-inner i {
  color: var(--c-accent);
  transform: scale(1.1);
}

.module-row:hover .module-image-inner img {
  transform: scale(1.08);
}

.module-number {
  font-size: 48px;
  font-weight: 900;
  color: rgba(176, 139, 89, 0.15);
  line-height: 1;
  margin-bottom: 8px;
  display: block;
}

.module-text h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--c-text);
}

.module-text > p {
  font-size: 15px;
  color: var(--c-text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}

.module-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.module-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--c-text-muted);
}

.module-list li i {
  color: var(--c-accent);
  font-size: 12px;
  flex-shrink: 0;
}

/* ============================================
   STEPS SECTION
   ============================================ */
.section-steps {
  padding: 120px 0;
  background: linear-gradient(180deg, var(--c-bg) 0%, #0d1b1e 100%);
}

.section-steps .section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-steps .section-label {
  justify-content: center;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.step-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), transparent);
  opacity: 0;
  transition: var(--transition);
}

.step-card:hover {
  background: var(--c-bg-card-hover);
  border-color: rgba(176, 139, 89, 0.3);
  transform: translateY(-4px);
}

.step-card:hover::before {
  opacity: 1;
}

.step-num {
  font-size: 36px;
  font-weight: 900;
  color: var(--c-accent);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 16px;
}

.step-card:hover .step-num {
  opacity: 0.5;
}

.step-card h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--c-text);
}

.step-card p {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* ============================================
   PHONE MOCKUP / TESTIMONIALS
   ============================================ */
.section-testimonials {
  padding: 120px 0;
  background: var(--c-bg);
}

.section-testimonials .section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-testimonials .section-label {
  justify-content: center;
}

/* Phone Slider Wrapper */
.phone-slider-wrapper {
  position: relative;
  overflow: hidden;
}

.phone-slider-dots {
  display: none;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.phone-slider-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(176, 139, 89, 0.25);
  transition: var(--transition);
  cursor: pointer;
}

.phone-slider-dots .dot.active {
  background: var(--c-accent);
  width: 24px;
  border-radius: 4px;
}

.phone-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1000px;
  margin: 0 auto;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.phone-mockup {
  display: flex;
  justify-content: center;
}

.phone-frame {
  width: 280px;
  background: #1c1c1e;
  border-radius: 36px;
  border: 3px solid #3a3a3c;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
  position: relative;
}

.phone-notch {
  width: 120px;
  height: 28px;
  background: #000;
  border-radius: 0 0 16px 16px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.phone-status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  margin-top: -20px;
  position: relative;
  z-index: 1;
  height: 28px;
}

.phone-time {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  font-family: -apple-system, sans-serif;
}

.phone-status-icons {
  display: flex;
  gap: 4px;
  font-size: 10px;
  color: #fff;
}

.phone-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid #2c2c2e;
  background: #1c1c1e;
}

.phone-header > i {
  color: var(--c-accent);
  font-size: 14px;
}

.phone-contact {
  display: flex;
  align-items: center;
  gap: 10px;
}

.phone-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(26, 83, 92, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary-light);
  font-size: 14px;
}

.phone-contact span {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
}

.phone-chat {
  padding: 16px 12px;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: #000;
}

.chat-date {
  text-align: center;
  font-size: 10px;
  color: #8e8e93;
  margin-bottom: 4px;
  padding: 4px 12px;
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  display: inline-block;
  align-self: center;
}

.chat-bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 18px;
  position: relative;
}

.chat-bubble p {
  font-size: 13px;
  line-height: 1.5;
  font-family: -apple-system, 'Noto Serif KR', sans-serif;
}

.chat-time {
  display: block;
  font-size: 9px;
  margin-top: 4px;
  opacity: 0.5;
}

.chat-received {
  background: #2c2c2e;
  color: #fff;
  align-self: flex-start;
  border-bottom-left-radius: 6px;
}

.chat-received .chat-time {
  color: #8e8e93;
  text-align: left;
}

.chat-sent {
  background: var(--c-primary);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 6px;
}

.chat-sent .chat-time {
  color: rgba(255,255,255,0.5);
  text-align: right;
}

.phone-input-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: #1c1c1e;
  border-top: 1px solid #2c2c2e;
}

.phone-input-bar > i {
  color: var(--c-accent);
  font-size: 16px;
}

.phone-input-field {
  flex: 1;
  padding: 8px 14px;
  background: #2c2c2e;
  border-radius: 20px;
  font-size: 13px;
  color: #8e8e93;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 60px 0 140px;
  background: #0a0a0a;
  border-top: 1px solid rgba(176, 139, 89, 0.1);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 32px;
}

.footer-brand h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--c-text);
}

.footer-brand h3 i {
  color: var(--c-accent);
  margin-right: 8px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--c-text-muted);
  margin-top: 4px;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-link {
  font-size: 14px;
  color: var(--c-text-muted);
  transition: var(--transition);
  padding: 4px 0;
}

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

.footer-divider {
  color: rgba(255,255,255,0.15);
  font-size: 12px;
}

.footer-bottom {
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--c-text-muted);
  opacity: 0.6;
}

.footer-notice {
  margin-top: 8px;
  font-size: 12px;
}

/* ============================================
   FIXED BOTTOM CTA
   ============================================ */
.fixed-bottom-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 24px;
  background: linear-gradient(to top, rgba(10,10,10,0.98) 60%, rgba(10,10,10,0) 100%);
  pointer-events: none;
  text-align: center;
}

.btn-fixed-cta {
  pointer-events: all;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 48px;
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-dark));
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 60px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 24px rgba(176, 139, 89, 0.4);
  animation: ctaUrgent 1.8s ease-in-out infinite;
  white-space: nowrap;
  margin: 0 auto;
}

.btn-fixed-cta:hover {
  animation-play-state: paused;
  transform: scale(1.05);
  box-shadow: 0 8px 40px rgba(176, 139, 89, 0.6);
}

@keyframes ctaUrgent {
  0% {
    transform: scale(1);
    box-shadow: 0 4px 24px rgba(176, 139, 89, 0.4);
  }
  15% {
    transform: scale(1.08);
    box-shadow: 0 6px 32px rgba(176, 139, 89, 0.55);
  }
  30% {
    transform: scale(0.97);
    box-shadow: 0 3px 20px rgba(176, 139, 89, 0.35);
  }
  45% {
    transform: scale(1.06);
    box-shadow: 0 6px 30px rgba(176, 139, 89, 0.5);
  }
  60% {
    transform: scale(0.98);
    box-shadow: 0 3px 22px rgba(176, 139, 89, 0.38);
  }
  75% {
    transform: scale(1.03);
    box-shadow: 0 5px 28px rgba(176, 139, 89, 0.45);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 4px 24px rgba(176, 139, 89, 0.4);
  }
}

/* ============================================
   MODALS
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  padding: 24px;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: #1a1a1a;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  max-width: 680px;
  width: 100%;
  max-height: 80vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal-container {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 32px;
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0;
}

.modal-header h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text);
}

.modal-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--c-text-muted);
  font-size: 18px;
  transition: var(--transition);
}

.modal-close:hover {
  background: rgba(255,255,255,0.08);
  color: var(--c-text);
}

.modal-body {
  padding: 32px;
  overflow-y: auto;
  flex: 1;
}

.modal-body h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-accent);
  margin-top: 24px;
  margin-bottom: 10px;
}

.modal-body h4:first-child {
  margin-top: 0;
}

.modal-body p {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.8;
  margin-bottom: 12px;
}

.modal-body ul {
  margin-bottom: 12px;
  padding-left: 20px;
}

.modal-body ul li {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.8;
  position: relative;
  padding-left: 16px;
}

.modal-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-accent);
  opacity: 0.5;
}

.modal-date {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
  font-size: 13px;
  color: var(--c-text-muted);
  opacity: 0.6;
}

/* ============================================
   PARTICLES CANVAS
   ============================================ */
.hero-bg-particles canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* -- Tablet -- */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .split-row {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .module-row {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .module-row-reverse {
    direction: ltr;
  }

  .module-image {
    order: -1;
  }

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .phone-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 600px;
  }

  .phone-grid .phone-mockup:last-child {
    grid-column: 1 / -1;
    justify-self: center;
  }

  .phone-frame {
    width: 260px;
  }

  .section-intro,
  .section-framework,
  .section-modules,
  .section-steps,
  .section-community,
  .section-testimonials {
    padding: 80px 0;
  }
}

/* -- Mobile -- */
@media (max-width: 768px) {
  .hide-mobile {
    display: none;
  }

  .container {
    padding: 0 16px;
  }

  .hero {
    min-height: 100svh;
  }

  .hero-content {
    padding: 90px 16px 70px;
  }

  .hero-badge {
    font-size: 10px;
    letter-spacing: 2px;
    padding: 6px 14px;
    margin-bottom: 28px;
  }

  .hero h1 {
    margin-bottom: 20px;
  }

  .hero-sub {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 32px;
  }

  .hero-cta-group {
    flex-direction: row;
    gap: 10px;
  }

  .hero-cta-group .btn-primary,
  .hero-cta-group .btn-secondary {
    padding: 12px 20px;
    font-size: 13px;
    flex: 1;
    max-width: 180px;
  }

  .hero-cta-group .btn-icon {
    width: 14px;
    height: 14px;
    margin-right: 5px;
  }

  .hero-disclaimer {
    font-size: 11px;
  }

  .hero-scroll-indicator {
    bottom: 24px;
  }

  .section-label {
    font-size: 11px;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
  }

  .label-line {
    width: 20px;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 12px;
  }

  .section-desc {
    font-size: 14px;
  }

  /* Features: 2 columns on mobile */
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 32px;
  }

  .feature-card {
    padding: 24px 16px;
  }

  .feature-icon {
    width: 48px;
    height: 48px;
    font-size: 20px;
    margin-bottom: 12px;
    border-radius: 12px;
  }

  .feature-card h3 {
    font-size: 15px;
    margin-bottom: 6px;
  }

  .feature-card p {
    font-size: 12px;
    line-height: 1.5;
  }

  /* Split text center on mobile */
  .split-text {
    text-align: center;
  }

  .split-text .section-label {
    justify-content: center;
  }

  .split-text .section-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .split-text .btn-primary {
    margin: 0 auto;
  }

  /* Framework visual */
  .framework-visual {
    padding: 20px 12px;
    gap: 16px;
  }

  .framework-img {
    max-width: 200px;
  }

  .fw-flow {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .fw-node {
    padding: 12px 8px;
    min-width: 64px;
    font-size: 11px;
    gap: 4px;
  }

  .fw-node i {
    font-size: 18px;
  }

  .fw-arrow {
    font-size: 10px;
  }

  .split-text .btn-primary {
    padding: 12px 24px;
    font-size: 14px;
  }

  /* Modules section center on mobile */
  .section-modules .section-label {
    justify-content: center;
  }

  .section-modules .section-title {
    text-align: center;
  }

  /* Module rows compact */
  .module-row {
    grid-template-columns: auto 1fr;
    gap: 20px;
    margin-bottom: 48px;
  }

  .module-row-reverse {
    direction: ltr;
  }

  .module-image-inner {
    width: 80px;
    height: 80px;
  }

  .module-image-inner i {
    font-size: 28px;
  }

  .module-number {
    font-size: 32px;
    margin-bottom: 4px;
  }

  .module-text h3 {
    font-size: 17px;
    margin-bottom: 6px;
  }

  .module-text > p {
    font-size: 13px;
    margin-bottom: 12px;
  }

  .module-list li {
    font-size: 12px;
    gap: 6px;
  }

  .module-list li i {
    font-size: 10px;
  }

  /* Steps: 2 columns */
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .step-card {
    padding: 24px 16px;
  }

  .step-num {
    font-size: 28px;
    margin-bottom: 10px;
  }

  .step-card h4 {
    font-size: 15px;
    margin-bottom: 6px;
  }

  .step-card p {
    font-size: 12px;
    line-height: 1.6;
  }

  /* Community visual horizontal */
  .community-visual {
    flex-direction: row;
    gap: 10px;
    padding: 0;
    flex-wrap: wrap;
    justify-content: center;
  }

  .comm-circle {
    flex-direction: column;
    text-align: center;
    padding: 16px 12px;
    gap: 8px;
    flex: 1;
    min-width: 90px;
    max-width: 120px;
  }

  .comm-circle span {
    font-size: 12px;
  }

  .comm-circle i {
    width: 40px;
    height: 40px;
    font-size: 18px;
    border-radius: 10px;
  }

  .comm-circle:hover {
    transform: translateY(-4px);
  }

  /* Phone slider on mobile */
  .phone-slider-wrapper {
    overflow: hidden;
  }

  .phone-grid {
    display: flex;
    gap: 0;
    max-width: none;
    overflow: visible;
    width: 300%;
  }

  .phone-mockup {
    width: calc(100% / 3);
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    padding: 0 8px;
  }

  .phone-grid .phone-mockup:last-child {
    grid-column: auto;
    justify-self: auto;
  }

  .phone-slider-dots {
    display: flex;
  }

  .phone-frame {
    width: 260px;
    max-width: 260px;
    border-radius: 28px;
    border-width: 2px;
  }

  .phone-notch {
    width: 90px;
    height: 22px;
    border-radius: 0 0 12px 12px;
  }

  .phone-status-bar {
    padding: 0 14px;
    margin-top: -16px;
    height: 22px;
  }

  .phone-time {
    font-size: 10px;
  }

  .phone-status-icons {
    font-size: 8px;
    gap: 3px;
  }

  .phone-header {
    padding: 8px 12px;
  }

  .phone-avatar {
    width: 26px;
    height: 26px;
    font-size: 11px;
  }

  .phone-contact span {
    font-size: 12px;
  }

  .phone-header > i {
    font-size: 12px;
  }

  .phone-chat {
    padding: 10px 8px;
    min-height: 200px;
    gap: 6px;
  }

  .chat-date {
    font-size: 9px;
    padding: 3px 8px;
  }

  .chat-bubble {
    padding: 8px 10px;
    border-radius: 14px;
    max-width: 88%;
  }

  .chat-bubble p {
    font-size: 11px;
    line-height: 1.45;
  }

  .chat-time {
    font-size: 8px;
    margin-top: 3px;
  }

  .chat-received { border-bottom-left-radius: 4px; }
  .chat-sent { border-bottom-right-radius: 4px; }

  .phone-input-bar {
    padding: 8px 10px;
    gap: 8px;
  }

  .phone-input-bar > i {
    font-size: 13px;
  }

  .phone-input-field {
    padding: 6px 10px;
    font-size: 11px;
    border-radius: 16px;
  }

  /* Footer compact */
  .footer {
    padding: 40px 0 120px;
  }

  .footer-top {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-brand h3 {
    font-size: 16px;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
  }

  .footer-link {
    font-size: 13px;
  }

  .footer-bottom p {
    font-size: 12px;
  }

  /* Fixed CTA mobile */
  .fixed-bottom-cta {
    padding: 12px 16px;
  }

  .btn-fixed-cta {
    padding: 13px 28px;
    font-size: 14px;
    width: auto;
    max-width: calc(100% - 32px);
  }

  .btn-fixed-cta .btn-icon {
    width: 15px;
    height: 15px;
    margin-right: 6px;
  }

  /* Sections compact */
  .section-intro,
  .section-framework,
  .section-modules,
  .section-steps,
  .section-community,
  .section-testimonials {
    padding: 60px 0;
  }

  .section-modules .section-title {
    margin-bottom: 32px;
  }

  .section-steps .section-title,
  .section-testimonials .section-title {
    margin-bottom: 32px;
  }
}

/* -- Small Mobile -- */
@media (max-width: 380px) {
  .hero h1 {
    font-size: 32px;
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta-group .btn-primary,
  .hero-cta-group .btn-secondary {
    max-width: 260px;
    width: 100%;
  }

  .features-grid,
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .feature-card {
    padding: 18px 10px;
  }

  .feature-card h3 {
    font-size: 13px;
  }

  .feature-card p {
    font-size: 11px;
  }

  .step-card {
    padding: 18px 12px;
  }

  .phone-frame {
    width: 240px;
    max-width: 240px;
  }

  .section-title {
    font-size: 22px;
  }

  .modal-container {
    margin: 12px;
    max-height: 85vh;
    border-radius: 16px;
  }

  .modal-header {
    padding: 18px 20px;
  }

  .modal-header h3 {
    font-size: 17px;
  }

  .modal-body {
    padding: 20px;
  }

  .btn-fixed-cta {
    padding: 12px 24px;
    font-size: 13px;
  }
}