/* ═══════════════════════════════════════════════
   ScaleDM Landing Page — WhatsApp-Inspired Design
   Modern / Responsive / Sleek — May 2026
   ═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* ── WhatsApp-inspired palette ─────────────── */
  --wa-green:       #25D366;
  --wa-green-dark:  #128C7E;
  --wa-teal:        #075E54;
  --wa-teal-deep:   #054640;
  --wa-light-green: #DCF8C6;
  --wa-chat-bg:     #ECE5DD;

  /* ── Surface & text ────────────────────────── */
  --bg-body:        #f7f8fa;
  --bg-surface:     #ffffff;
  --bg-soft:        #f0f4f2;
  --border-subtle:  #e2e8e5;
  --border-hover:   rgba(37,211,102,0.3);
  --text-primary:   #0b1215;
  --text-secondary: #4a5568;
  --text-muted:     #8e99a4;

  /* ── Gradient accents ──────────────────────── */
  --gradient-brand: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
  --gradient-hero:  linear-gradient(135deg, #25D366 0%, #075E54 100%);
  --gradient-text:  linear-gradient(135deg, #25D366 0%, #075E54 100%);
  --gradient-soft:  linear-gradient(180deg, rgba(37,211,102,0.06) 0%, transparent 60%);

  /* ── Radii ─────────────────────────────────── */
  --radius-2xl: 32px;
  --radius-xl:  24px;
  --radius-lg:  18px;
  --radius-md:  12px;
  --radius-sm:  8px;
  --radius-full: 999px;

  /* ── Shadows ───────────────────────────────── */
  --shadow-xs:  0 1px 2px rgba(11,18,21,0.04);
  --shadow-sm:  0 2px 8px rgba(11,18,21,0.06);
  --shadow-md:  0 4px 24px rgba(11,18,21,0.08);
  --shadow-lg:  0 12px 48px rgba(11,18,21,0.10);
  --shadow-xl:  0 24px 64px rgba(11,18,21,0.12);

  /* ── Font ──────────────────────────────────── */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

:root[data-theme="dark"] {
  /* ── Surface & text ────────────────────────── */
  --bg-body:        #0b0d11;
  --bg-surface:     #12151c;
  --bg-soft:        #1a1e28;
  --border-subtle:  #262d3a;
  --border-hover:   rgba(37,211,102,0.4);
  --text-primary:   #e4e8f0;
  --text-secondary: #8893a7;
  --text-muted:     #5a6478;

  /* ── Shadows ───────────────────────────────── */
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.3);
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 24px rgba(0,0,0,0.5);
  --shadow-lg:  0 12px 48px rgba(0,0,0,0.6);
  --shadow-xl:  0 24px 64px rgba(0,0,0,0.7);

  /* ── Gradients & other ─────────────────────────── */
  --gradient-soft:  linear-gradient(180deg, rgba(37,211,102,0.04) 0%, transparent 60%);
  --wa-chat-bg:     #0b0d11;
}

/* ── Reset & base ────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: var(--font-sans);
  background: var(--bg-body);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ── Ambient background ──────────────────────── */
.bg-ambient {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none; overflow: hidden;
}
.bg-orb {
  position: absolute; border-radius: 50%;
  filter: blur(100px); opacity: 0.5;
}
.bg-orb--teal {
  width: 700px; height: 700px; top: -20%; left: -15%;
  background: radial-gradient(circle, rgba(37,211,102,0.14), transparent 70%);
  animation: orb-drift 24s ease-in-out infinite;
}
.bg-orb--purple {
  width: 500px; height: 500px; bottom: -12%; right: -10%;
  background: radial-gradient(circle, rgba(7,94,84,0.12), transparent 70%);
  animation: orb-drift 30s ease-in-out infinite reverse;
}
.bg-orb--blue {
  width: 350px; height: 350px; top: 50%; left: 55%;
  background: radial-gradient(circle, rgba(18,140,126,0.08), transparent 70%);
  animation: orb-drift 20s ease-in-out infinite 4s;
}
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(11,18,21,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11,18,21,0.018) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 55% at 50% 35%, black 25%, transparent 100%);
}
@keyframes orb-drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(24px, -32px) scale(1.03); }
  66%  { transform: translate(-16px, 16px) scale(0.97); }
}

/* ── Navigation ──────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 12px 24px;
  background: var(--bg-surface);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.35s ease;
}
.nav-inner {
  max-width: 1120px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px; text-decoration: none;
}
.nav-logo img {
  width: 34px; height: 34px; border-radius: 10px;
}
.nav-logo-text {
  font-size: 19px; font-weight: 800; letter-spacing: -0.5px;
  background: var(--gradient-text); -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; background-clip: text;
}

/* ── Sections ────────────────────────────────── */
section { position: relative; z-index: 1; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ── Hero ────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 120px 24px 80px;
  background: var(--gradient-soft);
}
.hero-inner { max-width: 760px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px 7px 10px; border-radius: var(--radius-full);
  background: rgba(37,211,102,0.08);
  border: 1px solid rgba(37,211,102,0.2);
  font-size: 13px; font-weight: 600; color: var(--wa-green-dark);
  margin-bottom: 28px; animation: fade-up 0.7s ease both;
}
.hero-badge-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--wa-green);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}

.hero h1 {
  font-size: clamp(40px, 5.5vw, 72px); font-weight: 900;
  letter-spacing: -2px; line-height: 1.06; margin-bottom: 22px;
  color: var(--text-primary);
  animation: fade-up 0.7s ease 0.1s both;
}
.hero h1 .gradient-text {
  background: var(--gradient-hero); -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-subtitle {
  font-size: clamp(16px, 1.8vw, 20px); color: var(--text-secondary);
  max-width: 560px; margin: 0 auto 36px; line-height: 1.75; font-weight: 400;
  animation: fade-up 0.7s ease 0.2s both;
}
.hero-actions {
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
  animation: fade-up 0.7s ease 0.3s both;
}

/* ── Buttons ─────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 34px; border-radius: var(--radius-full);
  font-size: 15px; font-weight: 700;
  text-decoration: none; border: none; cursor: pointer;
  background: var(--gradient-brand); color: #fff;
  box-shadow: 0 4px 20px rgba(37,211,102,0.25), 0 1px 4px rgba(18,140,126,0.15);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: var(--font-sans); position: relative; overflow: hidden;
}
.btn-primary::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent 60%);
  opacity: 0; transition: opacity 0.3s;
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(37,211,102,0.30), 0 2px 8px rgba(18,140,126,0.18);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 34px; border-radius: var(--radius-full);
  font-size: 15px; font-weight: 600;
  text-decoration: none; cursor: pointer;
  background: var(--bg-surface); color: var(--text-primary);
  border: 1px solid var(--border-subtle); box-shadow: var(--shadow-xs);
  transition: all 0.3s ease; font-family: var(--font-sans);
}
.btn-secondary:hover {
  background: var(--bg-soft); border-color: var(--border-hover);
  transform: translateY(-1px); box-shadow: var(--shadow-sm);
}

/* ── Chat Demo ───────────────────────────────── */
.chat-demo {
  margin-top: 64px; animation: fade-up 0.7s ease 0.5s both;
}
.chat-window {
  max-width: 460px; margin: 0 auto;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); overflow: hidden;
  box-shadow: var(--shadow-xl);
}
.chat-header {
  padding: 14px 18px; display: flex; align-items: center; gap: 12px;
  background: var(--wa-teal); color: #fff;
}
.chat-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 15px; color: #fff;
}
.chat-header-info h4 { font-size: 14px; font-weight: 600; color: #fff; }
.chat-header-info span { font-size: 11px; color: rgba(255,255,255,0.7); }

.chat-body {
  padding: 16px; display: flex; flex-direction: column; gap: 8px;
  min-height: 210px;
  background: var(--wa-chat-bg);
  background-image: 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='%23c8c3bc' fill-opacity='0.08'%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");
}
:root[data-theme="dark"] .chat-body {
  background-image: 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='%23ffffff' 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");
}
.chat-msg {
  max-width: 82%; padding: 10px 14px; border-radius: 12px;
  font-size: 13.5px; line-height: 1.5; opacity: 0;
  animation: msg-appear 0.5s ease forwards;
  position: relative;
}
.chat-msg--user {
  align-self: flex-end;
  background: var(--wa-light-green); color: var(--text-primary);
  border-top-right-radius: 4px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}
.chat-msg--bot {
  align-self: flex-start;
  background: var(--bg-surface); color: var(--text-primary);
  border-top-left-radius: 4px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}
:root[data-theme="dark"] .chat-msg--bot {
  background: var(--bg-soft);
}
:root[data-theme="dark"] .chat-msg--user {
  background: #1a3a2a; color: var(--text-primary);
}
.chat-msg:nth-child(1) { animation-delay: 0.8s; }
.chat-msg:nth-child(2) { animation-delay: 1.6s; }
.chat-msg:nth-child(3) { animation-delay: 2.4s; }
.chat-msg:nth-child(4) { animation-delay: 3.2s; }

@keyframes msg-appear {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.chat-typing {
  align-self: flex-start; display: flex; gap: 4px; padding: 12px 16px;
  background: var(--bg-surface); border-radius: 12px; border-top-left-radius: 4px;
  opacity: 0; animation: msg-appear 0.5s ease 3.8s forwards;
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}
:root[data-theme="dark"] .chat-typing {
  background: var(--bg-soft);
}
.chat-typing span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--text-muted);
  animation: typing-bounce 1.4s ease-in-out infinite;
}
.chat-typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-typing span:nth-child(3) { animation-delay: 0.30s; }
@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-5px); }
}

/* ── Features ────────────────────────────────── */
.features { padding: 110px 24px; }

.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 2px; color: var(--wa-green-dark); margin-bottom: 14px;
}
.section-title {
  font-size: clamp(30px, 3.8vw, 46px); font-weight: 800;
  letter-spacing: -1.2px; line-height: 1.12; margin-bottom: 14px;
  color: var(--text-primary);
}
.section-subtitle {
  font-size: 16px; color: var(--text-secondary);
  max-width: 520px; line-height: 1.7;
}

.features-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 18px; margin-top: 52px;
}
.feature-card {
  padding: 30px; border-radius: var(--radius-lg);
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-xs);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative; overflow: hidden;
}
.feature-card::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-brand); opacity: 0;
  transition: opacity 0.35s;
}
.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-card:hover::after { opacity: 1; }

.feature-icon {
  width: 46px; height: 46px; border-radius: var(--radius-md);
  margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
  font-size: 21px;
}
.feature-card:nth-child(1) .feature-icon { background: rgba(37,211,102,0.1); }
.feature-card:nth-child(2) .feature-icon { background: rgba(7,94,84,0.08); }
.feature-card:nth-child(3) .feature-icon { background: rgba(18,140,126,0.08); }
.feature-card:nth-child(4) .feature-icon { background: rgba(37,211,102,0.08); }
.feature-card h3 {
  font-size: 17px; font-weight: 700; margin-bottom: 6px;
  letter-spacing: -0.2px; color: var(--text-primary);
}
.feature-card p {
  font-size: 14px; color: var(--text-secondary); line-height: 1.65;
}

/* ── How It Works ────────────────────────────── */
.how-it-works {
  padding: 100px 24px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.steps-track {
  display: flex; gap: 20px; margin-top: 52px;
  flex-wrap: wrap; justify-content: center;
}
.step-card {
  flex: 1; min-width: 220px; max-width: 300px; text-align: center;
  padding: 32px 22px; border-radius: var(--radius-lg);
  background: var(--bg-body); border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-xs);
  position: relative; transition: all 0.3s ease;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}
.step-number {
  width: 42px; height: 42px; margin: 0 auto 18px;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 800;
  background: var(--gradient-brand); color: #fff;
  box-shadow: 0 4px 12px rgba(37,211,102,0.20);
}
.step-card h3 {
  font-size: 16px; font-weight: 700; margin-bottom: 6px;
  color: var(--text-primary);
}
.step-card p {
  font-size: 13.5px; color: var(--text-secondary); line-height: 1.6;
}

/* ── CTA / Coming Soon ───────────────────────── */
.cta-section { padding: 110px 24px; text-align: center; }
.cta-box {
  max-width: 580px; margin: 0 auto; padding: 56px 44px;
  border-radius: var(--radius-xl);
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-lg);
  position: relative; overflow: hidden;
}
.cta-box::after {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--gradient-brand);
}
.cta-box h2 {
  font-size: clamp(26px, 3.2vw, 38px); font-weight: 800;
  letter-spacing: -0.8px; margin-bottom: 12px; color: var(--text-primary);
}
.cta-box p {
  font-size: 16px; color: var(--text-secondary); line-height: 1.7;
}

/* ── Footer ──────────────────────────────────── */
.footer {
  padding: 32px 24px; text-align: center;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
}
.footer-logo {
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 10px; text-decoration: none;
}
.footer-logo img { width: 24px; height: 24px; border-radius: 6px; }
.footer-logo span {
  font-size: 15px; font-weight: 700;
  background: var(--gradient-text); -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; background-clip: text;
}
.footer p { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.footer a {
  color: var(--text-secondary); text-decoration: none;
  transition: color 0.25s;
}
.footer a:hover { color: var(--wa-green-dark); }

/* ── Scroll Reveal ───────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ──────────────────────────────── */
@media (max-width: 768px) {
  .hero { padding: 100px 20px 60px; }
  .hero h1 { letter-spacing: -1.2px; }
  .features-grid { grid-template-columns: 1fr; }
  .steps-track { flex-direction: column; align-items: center; }
  .step-card { max-width: 100%; }
  .cta-box { padding: 40px 24px; }
  .chat-window { margin: 0; max-width: 100%; }
  .how-it-works { padding: 80px 20px; }
  .features { padding: 80px 20px; }
  .cta-section { padding: 80px 20px; }
}

@media (max-width: 480px) {
  .nav { padding: 10px 16px; }
  .nav-logo-text { font-size: 17px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .feature-card { padding: 24px; }
  .step-card { padding: 28px 20px; }
}