/* ============================================================
   SignConnect — Landing Page Styles
   landing.css
   ============================================================ */

/* ── Navbar ──────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-4) 0;
  transition: all var(--transition-normal);
}
.nav.scrolled {
  background: rgba(15,17,23,0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: var(--fw-bold);
}
.nav-logo-icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-lg);
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-2);
  transition: color var(--transition-fast);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}
.nav-link:hover { color: var(--color-text); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: var(--space-3); }

.mobile-menu-btn {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-md);
}
.mobile-menu-btn span {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--transition-normal);
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(79,142,247,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 50%,  rgba(167,139,250,0.1) 0%, transparent 50%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, black 30%, transparent 80%);
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(79,142,247,0.1);
  border: 1px solid rgba(79,142,247,0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  animation: slideDown 600ms ease both;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  animation: slideUp 600ms 100ms ease both;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-2);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: var(--space-8);
  animation: slideUp 600ms 200ms ease both;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  animation: slideUp 600ms 300ms ease both;
}

.hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-12);
  animation: slideUp 600ms 400ms ease both;
}
.stat-item { text-align: center; }
.stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--fw-bold);
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: var(--text-xs); color: var(--color-text-3); margin-top: 2px; }

/* ── Hero demo card ──────────────────────────────────────────── */
.hero-demo {
  animation: slideRight 700ms 200ms ease both;
  position: relative;
}

.demo-card {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl), 0 0 60px rgba(79,142,247,0.1);
}
.demo-card-header {
  background: var(--color-bg-3);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}
.demo-dots { display: flex; gap: 6px; }
.demo-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.demo-dot:nth-child(1) { background: #f87171; }
.demo-dot:nth-child(2) { background: #fbbf24; }
.demo-dot:nth-child(3) { background: #34d399; }

.demo-title { font-size: var(--text-sm); color: var(--color-text-2); margin-left: auto; margin-right: auto; }

.demo-body { padding: var(--space-4); }

.demo-messages {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 240px;
}

.demo-msg {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  animation: slideUp 400ms ease both;
}
.demo-msg.sent { flex-direction: row-reverse; }

.demo-bubble {
  max-width: 70%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.5;
}
.demo-msg.recv .demo-bubble {
  background: var(--color-surface);
  border-bottom-left-radius: 4px;
}
.demo-msg.sent .demo-bubble {
  background: var(--grad-primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.demo-msg.sign .demo-bubble {
  background: rgba(79,142,247,0.12);
  border: 1px solid rgba(79,142,247,0.25);
  color: var(--color-primary);
}
.demo-sign-label {
  font-size: var(--text-xs);
  color: var(--color-text-3);
  display: block;
  margin-top: 2px;
}

.demo-typing {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: 4px;
  width: fit-content;
}
.demo-typing span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-text-3);
  animation: bounce 1s infinite;
}
.demo-typing span:nth-child(2) { animation-delay: 0.2s; }
.demo-typing span:nth-child(3) { animation-delay: 0.4s; }

.demo-input-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  margin-top: var(--space-3);
}
.demo-input-bar input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  outline: none;
}
.demo-input-bar input::placeholder { color: var(--color-text-3); }

/* ── Typing cursor ───────────────────────────────────────────── */
.typing-cursor::after {
  content: '|';
  animation: blink 0.8s step-end infinite;
  color: var(--color-primary);
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ── Floating badges on hero demo ────────────────────────────── */
.float-badge {
  position: absolute;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  box-shadow: var(--shadow-lg);
  animation: float 4s ease-in-out infinite;
}
.float-badge.left  { left: -60px; top: 30%; animation-delay: 0s; }
.float-badge.right { right: -50px; top: 60%; animation-delay: 2s; }
@keyframes float {
  0%,100%{ transform: translateY(0); }
  50%    { transform: translateY(-8px); }
}

/* ── Features section ────────────────────────────────────────── */
.section { padding: var(--space-24) 0; }
.section-header { text-align: center; margin-bottom: var(--space-16); }
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: var(--space-4);
}
.section-desc {
  font-size: var(--text-lg);
  color: var(--color-text-2);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Feature cards ───────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--grad-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}
.feature-card:hover {
  border-color: rgba(79,142,247,0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.4), 0 0 40px rgba(79,142,247,0.08);
}
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-5);
  background: rgba(79,142,247,0.1);
  border: 1px solid rgba(79,142,247,0.2);
}
.feature-title {
  font-size: var(--text-lg);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-3);
}
.feature-desc {
  font-size: var(--text-sm);
  color: var(--color-text-2);
  line-height: 1.7;
}

/* ── How it works ────────────────────────────────────────────── */
.how-section { background: var(--color-bg-2); }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  position: relative;
}
.steps-grid::after {
  content: '';
  position: absolute;
  top: 28px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  opacity: 0.3;
  z-index: 0;
}

.step-card {
  text-align: center;
  padding: var(--space-6);
  position: relative;
  z-index: 1;
}
.step-number {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--grad-primary);
  color: #fff;
  font-weight: var(--fw-bold);
  font-size: var(--text-lg);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-5);
  box-shadow: 0 0 24px var(--color-primary-glow);
}
.step-title {
  font-size: var(--text-base);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-2);
}
.step-desc { font-size: var(--text-sm); color: var(--color-text-2); }

/* ── CTA section ─────────────────────────────────────────────── */
.cta-section {
  text-align: center;
  padding: var(--space-24) 0;
}
.cta-box {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-16) var(--space-8);
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse 50% 50% at 50% 50%, rgba(79,142,247,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.cta-title { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 800; margin-bottom: var(--space-4); }
.cta-desc  { font-size: var(--text-lg); color: var(--color-text-2); margin-bottom: var(--space-8); }
.cta-actions{ display: flex; align-items: center; justify-content: center; gap: var(--space-4); flex-wrap: wrap; }

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}
.footer-brand { max-width: 280px; }
.footer-desc { font-size: var(--text-sm); color: var(--color-text-2); line-height: 1.8; margin-top: var(--space-4); }
.footer-heading {
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-4);
}
.footer-links { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-link { font-size: var(--text-sm); color: var(--color-text-2); transition: color var(--transition-fast); }
.footer-link:hover { color: var(--color-text); }
.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-copy { font-size: var(--text-sm); color: var(--color-text-3); }
.footer-socials { display: flex; gap: var(--space-3); }
.social-btn {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  color: var(--color-text-2);
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border);
}
.social-btn:hover { background: var(--color-surface-2); color: var(--color-text); }

/* ── Auth modal specifics ────────────────────────────────────── */
.auth-tabs {
  display: flex;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 4px;
  margin-bottom: var(--space-6);
}
.auth-tab {
  flex: 1;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-2);
  transition: all var(--transition-fast);
  text-align: center;
}
.auth-tab.active {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.auth-form { display: flex; flex-direction: column; gap: var(--space-4); }
.auth-form-panel { display: none; }
.auth-form-panel.active { display: flex; flex-direction: column; gap: var(--space-4); }
.auth-footer-text { font-size: var(--text-xs); color: var(--color-text-3); text-align: center; }
.auth-footer-text a { color: var(--color-primary); }

.user-type-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
.user-type-option {
  padding: var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  font-size: var(--text-sm);
}
.user-type-option:hover { border-color: var(--color-primary); background: rgba(79,142,247,0.05); }
.user-type-option.selected { border-color: var(--color-primary); background: rgba(79,142,247,0.1); color: var(--color-primary); }
.user-type-option input { display: none; }
.user-type-emoji { font-size: 1.5rem; display: block; margin-bottom: 4px; }

/* ── Responsive landing ──────────────────────────────────────── */
@media (max-width: 1024px) {
  .features-grid  { grid-template-columns: repeat(2,1fr); }
  .steps-grid     { grid-template-columns: repeat(2,1fr); }
  .steps-grid::after { display: none; }
  .footer-grid    { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero-content   { grid-template-columns: 1fr; }
  .hero-demo      { display: none; }
  .nav-links      { display: none; }
  .mobile-menu-btn{ display: flex; }
  .float-badge    { display: none; }
  .hero-stats     { gap: var(--space-6); }
  .footer-grid    { grid-template-columns: 1fr; }
  .footer-bottom  { flex-direction: column; gap: var(--space-4); text-align: center; }
}

@media (max-width: 640px) {
  .features-grid  { grid-template-columns: 1fr; }
  .steps-grid     { grid-template-columns: 1fr; }
  .hero-actions   { flex-direction: column; align-items: flex-start; }
}