/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f0f4f8;
  --bg2: #ffffff;
  --primary: #1e3a5f;
  --primary-light: #2563eb;
  --accent: #0ea5e9;
  --green: #059669;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.06);
  --shadow: 0 2px 8px rgba(0,0,0,0.05), 0 8px 32px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.06), 0 16px 56px rgba(0,0,0,0.12);
  --radius: 14px;
  --radius-sm: 8px;
  --font: 'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 780px; }

.section-label {
  display: inline-block;
  background: #e0f2fe;
  color: var(--primary-light);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--primary-light); color: #fff; border-color: var(--primary-light); }
.btn--primary:hover { background: #1d4ed8; border-color: #1d4ed8; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(37,99,235,0.35); }
.btn--ghost { background: transparent; color: var(--primary); border-color: var(--border); }
.btn--ghost:hover { background: var(--bg2); border-color: var(--primary-light); color: var(--primary-light); }
.btn--nav { background: var(--primary); color: #fff; padding: 8px 18px; font-size: 0.85rem; }
.btn--nav:hover { background: var(--primary-light); }
.btn--lg { padding: 14px 28px; font-size: 1rem; border-radius: 10px; }
.btn--full { width: 100%; }

/* ===== NAV ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s;
}
.nav.scrolled { box-shadow: var(--shadow-sm); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.nav__logo { display: flex; align-items: center; gap: 8px; font-size: 1.15rem; font-weight: 700; color: var(--primary); text-decoration: none; letter-spacing: -0.02em; }
.nav__logo strong { color: var(--primary-light); }
.logo-icon { font-size: 1.4rem; color: var(--primary-light); }
.nav__links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav__links a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; font-weight: 500; transition: color 0.2s; }
.nav__links a:hover { color: var(--primary-light); }
.nav__burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.nav__burger span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(160deg, #ffffff 0%, #f0f6ff 50%, #e8f4fd 100%);
  padding: 80px 0 0; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -100px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding-bottom: 60px; }
.hero__badge { display: inline-flex; align-items: center; gap: 6px; background: #e0f2fe; color: var(--primary-light); font-size: 0.82rem; font-weight: 600; padding: 6px 14px; border-radius: 100px; margin-bottom: 1.25rem; }
.hero__title { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; line-height: 1.15; color: var(--primary); margin-bottom: 1.25rem; letter-spacing: -0.03em; }
.hero__sub { font-size: 1.05rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 2rem; max-width: 480px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 1.5rem; }
.hero__trust { display: flex; flex-wrap: wrap; gap: 16px; font-size: 0.82rem; color: var(--text-muted); }
.hero__trust span { display: flex; align-items: center; gap: 4px; }

.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.stat-card { background: var(--bg2); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); transition: transform 0.3s, box-shadow 0.3s; }
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.stat-card--accent { background: linear-gradient(135deg, #2563eb, #0ea5e9); color: white; }
.stat-card--dark { background: var(--primary); color: white; }
.stat-num { font-size: 2.4rem; font-weight: 800; line-height: 1; margin-bottom: 6px; color: var(--primary-light); }
.stat-card--accent .stat-num, .stat-card--dark .stat-num { color: white; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); line-height: 1.4; }
.stat-card--accent .stat-label, .stat-card--dark .stat-label { color: rgba(255,255,255,0.8); }
.hero__wave { line-height: 0; }

/* ===== PROBLEM ===== */
.problem { background: var(--bg); padding: 80px 0; text-align: center; }
.problem__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 2.5rem 0; text-align: left; }
.problem-card { background: var(--bg2); border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: box-shadow 0.2s, transform 0.2s; }
.problem-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.problem-card__icon { font-size: 2rem; margin-bottom: 12px; }
.problem-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; line-height: 1.4; }
.problem-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }
.problem__cta { background: var(--bg2); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); }
.problem__cta p { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 1.5rem; line-height: 1.7; }
.problem__cta strong { color: var(--primary); }

/* ===== SERVICES ===== */
.services { background: var(--bg2); padding: 80px 0; }
.services__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.service-card { background: var(--bg); border-radius: var(--radius); padding: 28px; border: 1px solid var(--border); transition: box-shadow 0.25s, transform 0.25s; position: relative; }
.service-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); background: var(--bg2); }
.service-card--featured { border-color: var(--primary-light); background: var(--bg2); box-shadow: 0 0 0 2px rgba(37,99,235,0.12), var(--shadow-sm); }
.service-card__badge { position: absolute; top: -12px; left: 24px; background: var(--primary-light); color: white; font-size: 0.72rem; font-weight: 700; padding: 4px 12px; border-radius: 100px; letter-spacing: 0.04em; }
.service-card__icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 16px; }
.service-card h3 { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.service-card p { font-size: 0.87rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 16px; }
.service-card__list { list-style: none; }
.service-card__list li { font-size: 0.82rem; color: var(--green); font-weight: 600; padding: 3px 0; }

/* ===== DEMOS ===== */
.demos { background: var(--bg); padding: 80px 0; }
.demo-tabs { display: flex; gap: 10px; margin-bottom: 24px; flex-wrap: wrap; }
.demo-tab { padding: 10px 20px; border-radius: var(--radius-sm); border: 2px solid var(--border); background: var(--bg2); color: var(--text-muted); font-family: var(--font); font-size: 0.88rem; font-weight: 600; cursor: pointer; transition: all 0.2s; }
.demo-tab:hover { border-color: var(--primary-light); color: var(--primary-light); }
.demo-tab.active { border-color: var(--primary-light); background: var(--primary-light); color: white; }
.demo-panel { display: none; }
.demo-panel.active { display: block; }

.demo-box { background: var(--bg2); border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); display: grid; grid-template-columns: 1fr 1fr; overflow: hidden; }
.demo-box--offer, .demo-box--chat { grid-template-columns: 1fr 1.2fr; }
.demo-box__left { padding: 36px; border-right: 1px solid var(--border); }
.demo-box__left h3 { font-size: 1.2rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.demo-box__left p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 1.5rem; line-height: 1.6; }
.demo-box__right { padding: 36px; background: #f8fafc; }

.slider-group { margin-bottom: 1.5rem; }
.slider-group label { display: flex; justify-content: space-between; font-size: 0.85rem; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.slider-val { color: var(--primary-light); font-weight: 700; }
.slider { -webkit-appearance: none; width: 100%; height: 6px; background: var(--border); border-radius: 3px; outline: none; cursor: pointer; }
.slider::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--primary-light); cursor: pointer; box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }

.roi-results { display: grid; grid-template-columns: 1fr; gap: 14px; }
.roi-card { border-radius: var(--radius-sm); padding: 18px 20px; border: 1px solid var(--border); background: var(--bg2); }
.roi-card--month { border-left: 4px solid var(--primary-light); }
.roi-card--year { border-left: 4px solid var(--green); }
.roi-card--payback { border-left: 4px solid #f59e0b; }
.roi-card__label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); font-weight: 600; margin-bottom: 4px; }
.roi-card__val { font-size: 1.8rem; font-weight: 800; color: var(--primary); line-height: 1.1; }
.roi-card--year .roi-card__val { color: var(--green); }
.roi-card__sub { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
.roi-note { font-size: 0.78rem; color: var(--text-muted); margin-top: 1rem; line-height: 1.5; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--text); margin-bottom: 5px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.input { width: 100%; padding: 9px 12px; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-family: var(--font); font-size: 0.88rem; color: var(--text); background: var(--bg2); transition: border-color 0.2s, box-shadow 0.2s; outline: none; }
.input:focus { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.textarea { resize: vertical; min-height: 100px; }
select.input { cursor: pointer; }

.offer-preview { min-height: 320px; background: var(--bg2); border-radius: var(--radius-sm); border: 1.5px dashed var(--border); display: flex; align-items: center; justify-content: center; }
.offer-preview--filled { border-style: solid; border-color: var(--border); align-items: flex-start; padding: 24px; }
.offer-preview__empty { text-align: center; color: var(--text-muted); padding: 32px; }
.offer-preview__empty p { margin-top: 10px; font-size: 0.88rem; }

.offer-doc { width: 100%; font-size: 0.82rem; }
.offer-doc__header { border-bottom: 2px solid var(--primary); padding-bottom: 12px; margin-bottom: 14px; }
.offer-doc__title { font-size: 1.1rem; font-weight: 800; color: var(--primary); }
.offer-doc__meta { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.offer-doc__parties { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 14px; }
.offer-doc__party-label { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.04em; margin-bottom: 2px; }
.offer-doc__party-name { font-weight: 700; color: var(--text); font-size: 0.85rem; }
.offer-doc__subject { background: #f0f6ff; border-radius: 6px; padding: 10px 14px; margin-bottom: 14px; }
.offer-doc__subject-label { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; color: var(--text-muted); margin-bottom: 4px; }
.offer-doc__subject-val { font-weight: 600; color: var(--text); }
.offer-doc__pricing { border: 1px solid var(--border); border-radius: 6px; overflow: hidden; margin-bottom: 14px; }
.offer-doc__price-row { display: grid; grid-template-columns: 1fr auto; padding: 8px 12px; border-bottom: 1px solid var(--border); }
.offer-doc__price-row:last-child { border-bottom: none; font-weight: 700; background: #f0f6ff; }
.offer-doc__valid { font-size: 0.78rem; color: var(--text-muted); }
.offer-doc__stamp { margin-top: 12px; display: inline-flex; align-items: center; gap: 6px; background: #dcfce7; color: var(--green); font-size: 0.75rem; font-weight: 700; padding: 4px 10px; border-radius: 100px; }

.chat-scenario { background: #fffbeb; border: 1px solid #fef3c7; border-radius: var(--radius-sm); padding: 14px; margin-bottom: 1.25rem; font-size: 0.84rem; color: var(--text); line-height: 1.6; }
.chat-metrics { margin-top: 1.25rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.chat-metric { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px; text-align: center; font-size: 0.78rem; }
.chat-metric strong { display: block; font-size: 0.9rem; color: var(--primary); margin-bottom: 2px; }
.chat-metric span { color: var(--text-muted); }

.chat-window { background: var(--bg2); border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); display: flex; flex-direction: column; height: 420px; overflow: hidden; }
.chat-header { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border-bottom: 1px solid var(--border); background: var(--primary); color: white; }
.chat-avatar { width: 36px; height: 36px; background: var(--primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.75rem; font-weight: 700; flex-shrink: 0; }
.chat-name { font-size: 0.88rem; font-weight: 600; }
.chat-status { font-size: 0.72rem; opacity: 0.8; }
.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.chat-msg { display: flex; }
.chat-msg--user { justify-content: flex-end; }
.chat-bubble { max-width: 78%; padding: 10px 14px; border-radius: 14px; font-size: 0.85rem; line-height: 1.5; }
.chat-msg--bot .chat-bubble { background: #f1f5f9; color: var(--text); border-bottom-left-radius: 4px; }
.chat-msg--user .chat-bubble { background: var(--primary-light); color: white; border-bottom-right-radius: 4px; }
.chat-typing .chat-bubble { background: #f1f5f9; color: var(--text-muted); font-style: italic; font-size: 0.8rem; }
.chat-input-row { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--border); }
.chat-input { flex: 1; padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 20px; font-size: 0.85rem; font-family: var(--font); outline: none; background: var(--bg); }
.chat-send { width: 36px; height: 36px; border-radius: 50%; background: var(--primary-light); color: white; border: none; cursor: pointer; font-size: 1rem; display: flex; align-items: center; justify-content: center; }

/* ===== CASES ===== */
.cases { background: var(--bg2); padding: 80px 0; }
.cases__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { background: var(--bg); border-radius: var(--radius); padding: 28px; border: 1px solid var(--border); transition: box-shadow 0.2s, transform 0.2s; }
.case-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.case-card__industry { font-size: 0.78rem; font-weight: 700; color: var(--primary-light); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 10px; }
.case-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--primary); margin-bottom: 16px; line-height: 1.4; }
.case-card__before-after { display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; align-items: start; margin-bottom: 16px; }
.case-before, .case-after { font-size: 0.78rem; }
.case-before strong, .case-after strong { display: block; margin-bottom: 6px; font-size: 0.8rem; color: var(--text-muted); }
.case-after strong { color: var(--green); }
.case-before ul, .case-after ul { list-style: none; display: flex; flex-direction: column; gap: 4px; }
.case-before li { color: #dc2626; padding-left: 12px; position: relative; line-height: 1.4; }
.case-before li::before { content: '✕'; position: absolute; left: 0; font-size: 0.7rem; }
.case-after li { color: var(--green); padding-left: 14px; position: relative; line-height: 1.4; }
.case-after li::before { content: '✓'; position: absolute; left: 0; }
.case-arrow { font-size: 1.2rem; color: var(--border); padding-top: 20px; }
.case-card__result { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 14px; border-top: 1px solid var(--border); }
.case-card__result span { font-size: 0.78rem; font-weight: 700; color: var(--primary); background: #e0f2fe; padding: 4px 10px; border-radius: 100px; }

/* ===== PROCESS ===== */
.process { background: var(--bg); padding: 80px 0; }
.process__steps { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; gap: 0; margin-top: 2.5rem; align-items: start; }
.process-step { background: var(--bg2); border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: box-shadow 0.2s, transform 0.2s; }
.process-step:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.process-step__num { font-size: 2rem; font-weight: 800; color: var(--border); line-height: 1; margin-bottom: 12px; }
.process-step h3 { font-size: 0.95rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.process-step p { font-size: 0.83rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; }
.process-step__time { display: inline-block; font-size: 0.75rem; font-weight: 700; color: var(--primary-light); background: #e0f2fe; padding: 3px 10px; border-radius: 100px; }
.process-connector { display: flex; align-items: center; justify-content: center; padding: 0 8px; margin-top: 40px; color: var(--border); font-size: 1.5rem; }
.process-connector::before { content: '→'; }

/* ===== FAQ ===== */
.faq { background: var(--bg2); padding: 80px 0; }
.faq__list { margin-top: 2rem; display: flex; flex-direction: column; gap: 10px; }
.faq-item { background: var(--bg); border-radius: var(--radius-sm); border: 1px solid var(--border); overflow: hidden; }
.faq-q { width: 100%; text-align: left; padding: 18px 20px; background: none; border: none; font-family: var(--font); font-size: 0.95rem; font-weight: 600; color: var(--text); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; transition: color 0.2s; }
.faq-q:hover { color: var(--primary-light); }
.faq-arrow { transition: transform 0.25s; color: var(--text-muted); flex-shrink: 0; }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s ease; font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; padding: 0 20px; }
.faq-item.open .faq-a { max-height: 200px; padding: 0 20px 18px; }

/* ===== CONTACT ===== */
.contact { background: var(--bg); padding: 80px 0; }
.contact__box { background: var(--bg2); border-radius: var(--radius); padding: 48px; box-shadow: var(--shadow); border: 1px solid var(--border); margin-top: 2rem; }
.form-note { font-size: 0.8rem; color: var(--text-muted); text-align: center; margin-top: 10px; }
.form-success { margin-top: 16px; padding: 14px; background: #dcfce7; color: var(--green); border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 600; text-align: center; }

/* ===== FOOTER ===== */
.footer { background: var(--primary); color: rgba(255,255,255,0.7); padding: 32px 0; }
.footer__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer .nav__logo { color: white; }
.footer .logo-icon { color: var(--accent); }
.footer__copy { font-size: 0.82rem; }
.footer__links { display: flex; gap: 20px; }
.footer__links a { color: rgba(255,255,255,0.6); font-size: 0.85rem; text-decoration: none; transition: color 0.2s; }
.footer__links a:hover { color: white; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .problem__grid { grid-template-columns: repeat(2, 1fr); }
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .process__steps { grid-template-columns: 1fr; gap: 12px; }
  .process-connector { margin: 0; padding: 4px; transform: rotate(90deg); justify-self: center; width: fit-content; }
  .cases__grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .nav__links { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: white; border-bottom: 1px solid var(--border); padding: 20px 24px; gap: 12px; box-shadow: var(--shadow); }
  .nav__links.open { display: flex; }
  .nav__burger { display: flex; }
  .demo-box { grid-template-columns: 1fr; }
  .demo-box__left { border-right: none; border-bottom: 1px solid var(--border); }
  .demo-box--offer, .demo-box--chat { grid-template-columns: 1fr; }
  .services__grid { grid-template-columns: 1fr; }
  .problem__grid { grid-template-columns: 1fr; }
  .contact__box { padding: 28px 20px; }
  .chat-metrics { grid-template-columns: 1fr; }
  .case-card__before-after { grid-template-columns: 1fr; }
  .case-arrow { display: none; }
  .demo-tabs { flex-direction: column; }
  .form-row { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .hero__cta { flex-direction: column; }
  .hero__trust { flex-direction: column; gap: 6px; }
}

/* ===== SKIP LINK (accessibility + SEO) ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  padding: 12px 20px;
  background: var(--primary-light);
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  z-index: 9999;
  border-radius: 0 0 var(--radius-sm) 0;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* ===== PROCESS OL RESET ===== */
.process__steps { list-style: none; }

/* ===== TAB PANEL HIDDEN ===== */
.demo-panel[hidden] { display: none; }

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { opacity: 0; }
.fade-up.visible { animation: fadeUp 0.5s ease forwards; }
.fade-up:nth-child(2) { animation-delay: 0.1s; }
.fade-up:nth-child(3) { animation-delay: 0.2s; }
.fade-up:nth-child(4) { animation-delay: 0.3s; }