/* ========================================
   Bitget Wallet Guide - Stylesheet
   ======================================== */

:root {
  --primary: #00C4D4;
  --primary-dark: #0099A8;
  --primary-light: #E0F9FB;
  --secondary: #1A1A2E;
  --accent: #FFD700;
  --danger: #FF4757;
  --warning: #FFA502;
  --info: #3498DB;
  --white: #FFFFFF;
  --gray-50: #F8F9FA;
  --gray-100: #F1F3F5;
  --gray-200: #E9ECEF;
  --gray-400: #ADB5BD;
  --gray-600: #6C757D;
  --gray-800: #343A40;
  --text: #1A1A2E;
  --text-light: #6C757D;
  --border: #E9ECEF;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --font: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }
ul { padding-left: 1.5em; }
li { margin-bottom: 0.4em; }

/* ===== CONTAINER ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--text);
}
.logo-icon { font-size: 1.8rem; }
.logo small { font-size: 0.75rem; color: var(--text-light); font-weight: 400; }
.main-nav {
  display: flex;
  gap: 8px;
}
.main-nav a {
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}
.main-nav a:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0A0E27 0%, #1A1A2E 50%, #0F2027 100%);
  color: var(--white);
  padding: 100px 0 80px;
  overflow: hidden;
  min-height: 600px;
  display: flex;
  align-items: center;
}
.hero-inner { position: relative; z-index: 2; }
.hero-badge {
  display: inline-block;
  background: rgba(0, 196, 212, 0.2);
  border: 1px solid rgba(0, 196, 212, 0.5);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 24px;
}
.hero-title .accent {
  color: var(--primary);
  position: relative;
}
.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
  font-family: var(--font);
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(0,196,212,0.4);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,196,212,0.5);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.4);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  color: var(--white);
  border-color: var(--white);
}
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat strong {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}
.stat span {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}
.hero-bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}
.shape-1 {
  width: 500px; height: 500px;
  background: var(--primary);
  right: -100px; top: -100px;
}
.shape-2 {
  width: 300px; height: 300px;
  background: #4A90E2;
  right: 200px; bottom: -50px;
}
.shape-3 {
  width: 200px; height: 200px;
  background: var(--accent);
  left: 10%; top: 20%;
}

/* ===== SECTION ===== */
.section { padding: 80px 0; }
.section-gray { background: var(--gray-50); }
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--text);
}
.section-desc {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 540px;
  margin: 0 auto;
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}
.about-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}
.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.about-icon { font-size: 2.5rem; margin-bottom: 16px; }
.about-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.about-card p { font-size: 0.9rem; color: var(--text-light); }

/* ===== ALERTS ===== */
.alert {
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.6;
}
.alert-icon { font-size: 1.2rem; flex-shrink: 0; }
.alert-info { background: #EBF5FF; color: #1A5276; border-left: 4px solid var(--info); }
.alert-warning { background: #FFF9E6; color: #7D5200; border-left: 4px solid var(--warning); }
.alert-danger { background: #FFF0F0; color: #7D0000; border-left: 4px solid var(--danger); }
.big-alert { padding: 20px 24px; font-size: 1rem; }

/* ===== FLOW BAR ===== */
.flow-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.flow-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: opacity 0.2s;
}
.flow-num {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--gray-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  transition: background 0.2s, color 0.2s;
}
.flow-item.active .flow-num {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(0,196,212,0.3);
}
.flow-label {
  font-size: 0.75rem;
  color: var(--text-light);
  font-weight: 500;
  white-space: nowrap;
}
.flow-item.active .flow-label { color: var(--primary-dark); font-weight: 700; }
.flow-arrow {
  font-size: 1.5rem;
  color: var(--gray-400);
  line-height: 1;
  padding-bottom: 20px;
}

/* ===== STEP CARDS ===== */
.step-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  margin-bottom: 32px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s;
}
.step-card:hover { box-shadow: var(--shadow-lg); }
.step-card-important {
  border-color: #FFB3B3;
  border-width: 2px;
}
.step-header {
  background: linear-gradient(135deg, var(--secondary) 0%, #2D2D4E 100%);
  color: var(--white);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.step-card-important .step-header {
  background: linear-gradient(135deg, #7D0000 0%, #B22222 100%);
}
.step-num {
  background: rgba(255,255,255,0.15);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  flex-shrink: 0;
}
.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  flex: 1;
}
.step-time {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  margin-left: auto;
}
.step-body { padding: 32px; }
.step-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: start;
}
.step-text p { margin-bottom: 16px; }

/* ===== INSTRUCTION LIST ===== */
.instruction-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 20px 0;
}
.instruction-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.inst-num {
  width: 32px; height: 32px;
  min-width: 32px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  margin-top: 2px;
}
.inst-text {
  padding-top: 4px;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== TIP BOX ===== */
.tip-box {
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-top: 16px;
}
.tip-title {
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}
.tip-box ul { margin: 0; font-size: 0.9rem; }
.tip-box li { color: var(--secondary); }

/* ===== DO/DONT ===== */
.do-dont {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}
.do-box, .dont-box {
  border-radius: var(--radius-sm);
  padding: 16px 20px;
}
.do-box { background: #E8F8F0; }
.dont-box { background: #FFF0F0; }
.do-title, .dont-title {
  font-weight: 700;
  margin-bottom: 10px;
}
.do-title { color: #1A7A4C; }
.dont-title { color: #C0392B; }
.do-box ul, .dont-box ul {
  margin: 0;
  font-size: 0.88rem;
}
.do-box li { color: #1A5C38; }
.dont-box li { color: #922B21; }

/* ===== DOWNLOAD BUTTONS ===== */
.dl-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 20px 0;
}
.dl-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: 12px;
  cursor: pointer;
  flex: 1;
  min-width: 180px;
  border: 1.5px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}
.dl-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); color: inherit; }
.dl-btn.ios { background: #000; color: #fff; border-color: #000; }
.dl-btn.ios:hover { color: #fff; }
.dl-btn.android { background: #fff; color: #000; }
.dl-btn.android:hover { color: #000; }
.dl-icon { font-size: 1.6rem; }
.dl-store { font-size: 0.7rem; opacity: 0.7; }
.dl-name { font-size: 0.95rem; font-weight: 700; }

/* ===== SECURITY LIST ===== */
.security-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 20px 0;
}
.security-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.sec-icon { font-size: 1.5rem; flex-shrink: 0; }
.sec-title { font-weight: 700; margin-bottom: 4px; }
.sec-desc { font-size: 0.88rem; color: var(--text-light); }

/* ===== ADDRESS ===== */
.address-explain {
  display: flex;
  gap: 16px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 20px 0;
  align-items: flex-start;
}
.address-icon { font-size: 1.5rem; }
.address-text { font-size: 0.92rem; }

/* ===== CONGRATS ===== */
.congrats-box {
  display: flex;
  gap: 16px;
  background: linear-gradient(135deg, #00C4D4, #0099A8);
  color: white;
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-top: 24px;
  align-items: flex-start;
}
.congrats-icon { font-size: 1.8rem; }
.congrats-text { font-size: 1rem; line-height: 1.6; }

/* ===== REAL SCREEN IMAGES ===== */
.real-screen-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.real-screen-img {
  width: 200px;
  border-radius: 20px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.22);
  display: block;
  border: 2px solid var(--border);
}
.real-screen-caption {
  font-size: 0.78rem;
  color: var(--text-light);
  text-align: center;
  line-height: 1.4;
  max-width: 200px;
}

/* ===== DOWNLOAD BADGES ===== */
.dl-badges-wrap {
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.dl-badge-link {
  display: inline-block;
  transition: transform 0.2s, opacity 0.2s;
}
.dl-badge-link:hover { transform: translateY(-2px); opacity: 0.9; }
.dl-badge-img {
  max-width: 260px;
  width: 100%;
  border-radius: 8px;
  display: block;
}
.dl-store-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dl-text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 8px 14px;
  background: var(--primary-light);
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
  width: fit-content;
}
.dl-text-link:hover {
  background: var(--primary);
  color: white;
}

/* ===== PHONE MOCK ===== */
.step-visual { display: flex; justify-content: center; }
.phone-mock {
  width: 200px;
  min-width: 200px;
  background: #1A1A2E;
  border-radius: 32px;
  padding: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  position: relative;
}
.phone-screen {
  background: var(--white);
  border-radius: 22px;
  overflow: hidden;
  min-height: 320px;
}
.phone-home-btn {
  width: 50px; height: 6px;
  background: rgba(255,255,255,0.2);
  border-radius: 3px;
  margin: 10px auto 0;
}

/* ===== APP STORE MOCK ===== */
.app-store-mock { padding: 12px; }
.store-header { margin-bottom: 16px; }
.store-search {
  background: var(--gray-100);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 0.75rem;
  color: var(--text-light);
}
.app-result {
  display: flex;
  align-items: center;
  gap: 10px;
  background: white;
  border-radius: 10px;
  padding: 10px;
  border: 1px solid var(--border);
}
.app-icon-mock {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, #00C4D4, #007A8A);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.app-info { flex: 1; }
.app-name-mock { font-weight: 700; font-size: 0.82rem; margin-bottom: 2px; }
.app-dev { font-size: 0.68rem; color: var(--text-light); }
.app-rating { font-size: 0.68rem; margin-top: 2px; }
.get-btn {
  background: var(--primary);
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: 16px;
  flex-shrink: 0;
}

/* ===== WALLET CREATE MOCK ===== */
.wallet-create-mock {
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  min-height: 320px;
  justify-content: center;
}
.mock-logo { font-size: 2.5rem; }
.mock-title { font-weight: 700; font-size: 1rem; color: var(--text); }
.mock-btn {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 700;
  text-align: center;
}
.mock-btn.primary { background: var(--primary); color: white; }
.mock-btn.secondary {
  background: white;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.mock-divider {
  font-size: 0.75rem;
  color: var(--text-light);
  position: relative;
  width: 100%;
  text-align: center;
}

/* ===== PHRASE MOCK ===== */
.phrase-mock { padding: 14px; }
.phrase-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}
.phrase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 10px;
}
.phrase-word {
  background: var(--gray-100);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 0.68rem;
  font-weight: 500;
  display: flex;
  gap: 4px;
  align-items: center;
}
.phrase-word span {
  color: var(--primary);
  font-size: 0.6rem;
  font-weight: 700;
  min-width: 12px;
}
.phrase-note {
  font-size: 0.65rem;
  text-align: center;
  color: var(--text-light);
}

/* ===== SECURITY MOCK ===== */
.security-mock { padding: 14px; }
.mock-header {
  font-weight: 700;
  font-size: 0.85rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}
.toggle-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: 0.78rem;
}
.toggle {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
}
.toggle.on { background: var(--primary); color: white; }
.toggle.off { background: var(--gray-200); color: var(--gray-600); }

/* ===== RECEIVE MOCK ===== */
.receive-mock { padding: 14px; text-align: center; }
.qr-mock {
  width: 120px; height: 120px;
  margin: 12px auto;
  background: white;
  border: 2px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}
.qr-inner {
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 4px,
    rgba(0,0,0,0.08) 4px,
    rgba(0,0,0,0.08) 5px
  ),
  repeating-linear-gradient(
    90deg,
    transparent,
    transparent 4px,
    rgba(0,0,0,0.08) 4px,
    rgba(0,0,0,0.08) 5px
  );
  position: relative;
  border-radius: 4px;
}
.qr-corner {
  position: absolute;
  width: 22px; height: 22px;
  border: 3px solid black;
}
.qr-corner.tl { top: 0; left: 0; border-right: none; border-bottom: none; }
.qr-corner.tr { top: 0; right: 0; border-left: none; border-bottom: none; }
.qr-corner.bl { bottom: 0; left: 0; border-right: none; border-top: none; }
.address-mock {
  font-size: 0.6rem;
  color: var(--text-light);
  font-family: monospace;
  word-break: break-all;
  padding: 4px 8px;
  background: var(--gray-100);
  border-radius: 4px;
  margin: 8px 0;
}
.copy-btn-mock {
  display: inline-block;
  background: var(--primary);
  color: white;
  font-size: 0.72rem;
  padding: 6px 12px;
  border-radius: 8px;
  font-weight: 700;
}

/* ===== INVITE SECTION ===== */
.invite-section {
  background: linear-gradient(135deg, #0A0E27 0%, #1A1A2E 100%);
  color: white;
}
.invite-section .section-tag {
  background: rgba(0,196,212,0.2);
  color: var(--primary);
  border: 1px solid rgba(0,196,212,0.4);
}
.invite-section .section-title { color: white; }
.invite-section .section-desc { color: rgba(255,255,255,0.7); }
.invite-card {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}
.invite-glow {
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-lg) + 2px);
  background: linear-gradient(135deg, var(--primary), #4A90E2, var(--primary));
  z-index: 0;
  animation: rotateGlow 3s linear infinite;
}
@keyframes rotateGlow {
  0% { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(360deg); }
}
.invite-inner {
  position: relative;
  z-index: 1;
  background: #151930;
  border-radius: var(--radius-lg);
  padding: 40px;
}
.invite-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.invite-code-display {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 16px 20px;
}
.invite-code {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--primary);
  font-family: monospace;
  flex: 1;
}
.copy-code-btn {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font);
  flex-shrink: 0;
}
.copy-code-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}
.invite-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}
.invite-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: rgba(255,255,255,0.85);
}
.feature-icon { font-size: 1.2rem; }
.invite-how {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
}
.invite-how-title {
  font-weight: 700;
  margin-bottom: 16px;
  color: rgba(255,255,255,0.8);
}
.invite-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.inv-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
}
.inv-num {
  width: 26px; height: 26px;
  min-width: 26px;
  background: rgba(0,196,212,0.2);
  border: 1px solid var(--primary);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
}

/* ===== USAGE GRID ===== */
.usage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.usage-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.usage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}
.usage-icon { font-size: 2.2rem; margin-bottom: 14px; }
.usage-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.usage-card p { font-size: 0.88rem; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 0.97rem;
  font-weight: 600;
  font-family: var(--font);
  color: var(--text);
  gap: 16px;
  transition: background 0.2s;
}
.faq-q:hover { background: var(--gray-50); }
.faq-arrow {
  color: var(--primary);
  transition: transform 0.3s;
  flex-shrink: 0;
  font-size: 0.8rem;
}
.faq-q.open .faq-arrow { transform: rotate(180deg); }
.faq-a {
  display: none;
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.8;
}
.faq-a.open { display: block; }
.faq-a p { margin-bottom: 10px; }
.faq-a ol, .faq-a ul {
  margin: 8px 0;
  padding-left: 20px;
}

/* ===== DISCLAIMER ===== */
.disclaimer-section { background: var(--gray-100); padding: 48px 0; }
.disclaimer-box {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 32px;
  background: var(--white);
}
.disclaimer-title {
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--gray-800);
}
.disclaimer-box ul {
  font-size: 0.85rem;
  color: var(--text-light);
}
.disclaimer-box li { margin-bottom: 8px; }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.7);
  padding: 40px 0 24px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}
.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.88rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--primary); }
.footer-invite {
  background: rgba(0,196,212,0.1);
  border: 1px solid rgba(0,196,212,0.3);
  color: var(--primary);
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 0.9rem;
}
.footer-copy {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* ===== FAB ===== */
.fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 56px;
  height: 56px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 4px 20px rgba(0,196,212,0.4);
  transition: transform 0.2s, box-shadow 0.2s;
  z-index: 50;
}
.fab:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 32px rgba(0,196,212,0.5);
  color: white;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .main-nav { display: none; flex-direction: column; }
  .main-nav.open {
    display: flex;
    position: absolute;
    top: 70px;
    left: 0; right: 0;
    background: white;
    padding: 16px;
    box-shadow: var(--shadow);
    z-index: 99;
    gap: 4px;
  }
  .hamburger { display: flex; }

  .hero { padding: 60px 0 50px; }
  .hero-stats { gap: 24px; }
  .stat strong { font-size: 1.4rem; }

  .section { padding: 56px 0; }

  .step-content {
    grid-template-columns: 1fr;
  }
  .step-visual { display: none; }
  .step-header { padding: 20px 24px; }
  .step-body { padding: 24px; }

  .do-dont { grid-template-columns: 1fr; }
  .dl-buttons { flex-direction: column; }
  .dl-btn { min-width: unset; }

  .flow-bar {
    gap: 4px;
  }
  .flow-label { display: none; }
  .flow-arrow { font-size: 1rem; padding-bottom: 0; }

  .invite-code { font-size: 1.5rem; letter-spacing: 0.1em; }
  .invite-inner { padding: 24px; }
  .invite-code-display { flex-direction: column; gap: 12px; }
  .copy-code-btn { width: 100%; }

  .about-grid { grid-template-columns: 1fr 1fr; }
  .usage-grid { grid-template-columns: 1fr 1fr; }

  .footer-links { gap: 16px; }
}

@media (max-width: 480px) {
  .about-grid { grid-template-columns: 1fr; }
  .usage-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .btn { width: 100%; }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.step-card, .about-card, .usage-card {
  animation: fadeInUp 0.5s ease both;
}

/* ===== SCROLL INDICATOR ===== */
.step-card:target {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,196,212,0.2);
}