/* ============================================================
   ResearchVaultAgent — Dark Navy Theme
   Matches bot branding: deep navy + cyan glow
   ============================================================ */

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

:root {
  /* Brand palette — matches bot logo */
  --primary: #06b6d4;
  --primary-dark: #0891b2;
  --primary-light: #22d3ee;
  --primary-soft: rgba(6, 182, 212, 0.08);
  --primary-glow: rgba(6, 182, 212, 0.35);
  --accent: #00e5ff;
  --accent-soft: rgba(0, 229, 255, 0.15);
  --danger: #f43f5e;
  --warning: #f59e0b;

  /* Dark navy backgrounds */
  --bg: #0a1628;
  --bg-alt: #0d1e35;
  --bg-soft: #102a47;
  --bg-card: #112b4a;
  --bg-header: rgba(10, 22, 40, 0.85);

  /* Text */
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-soft: #64748b;

  /* Borders */
  --border: rgba(148, 163, 184, 0.15);
  --border-strong: rgba(148, 163, 184, 0.25);
  --border-cyan: rgba(6, 182, 212, 0.3);

  /* Radii */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows / Glows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.5);
  --glow-sm: 0 0 20px rgba(6, 182, 212, 0.15);
  --glow: 0 0 40px rgba(6, 182, 212, 0.25);
  --glow-lg: 0 0 80px rgba(6, 182, 212, 0.4);

  --font: "Vazirmatn", system-ui, -apple-system, "Segoe UI", Tahoma, sans-serif;

  --container: 1200px;
  --header-h: 72px;

  --transition: 0.25s ease;
}

html {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

html[dir="rtl"] { direction: rtl; }
html[dir="ltr"] { direction: ltr; }

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
  background-attachment: fixed;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--accent); }

img, svg { max-width: 100%; display: block; }

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* -------- Layout -------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section--alt {
  background: var(--bg-alt);
}

/* -------- Header -------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--bg-header);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  white-space: nowrap;
}

.logo__icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: white;
  flex-shrink: 0;
  overflow: hidden;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
}

.logo__text-en {
  display: none;
  color: var(--text);
}

html[dir="ltr"] .logo__text-fa { display: none; }
html[dir="ltr"] .logo__text-en { display: inline; }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
}

.nav__link:hover {
  color: var(--primary-light);
  background: var(--primary-soft);
}

.nav__link--active {
  color: var(--primary-light);
  background: var(--primary-soft);
}

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

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--bg-soft);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition);
  border: 1px solid var(--border);
}

.lang-toggle:hover {
  background: var(--primary-soft);
  color: var(--primary-light);
  border-color: var(--border-cyan);
}

.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text);
}

/* -------- Buttons -------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn--primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.35);
}

.btn--primary:hover {
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(6, 182, 212, 0.5);
}

.btn--secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border-color: var(--border-strong);
  backdrop-filter: blur(8px);
}

.btn--secondary:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: var(--primary-soft);
}

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn--ghost:hover {
  color: var(--primary-light);
  background: var(--primary-soft);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 1.05rem;
  border-radius: var(--radius);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* -------- Hero -------- */
.hero {
  padding: 96px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary-light);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 20px;
}

.hero__title-accent {
  background: linear-gradient(135deg, #22d3ee 0%, #06b6d4 50%, #0891b2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 30px rgba(6, 182, 212, 0.4));
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 540px;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero__mockup {
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(17, 43, 74, 0.9) 0%, rgba(13, 30, 53, 0.9) 100%);
  border: 1px solid var(--border-cyan);
  box-shadow:
    var(--shadow-lg),
    0 0 60px rgba(6, 182, 212, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
}

.hero__mockup::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
  opacity: 0.5;
}

.hero__banner {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin-bottom: 16px;
  display: block;
  box-shadow: 0 0 40px rgba(6, 182, 212, 0.2);
}

.mockup-chat {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mockup-bubble {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  line-height: 1.5;
  max-width: 85%;
}

.mockup-bubble--user {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.mockup-bubble--bot {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
  border: 1px solid var(--border);
}

.mockup-file {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--primary-soft);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius);
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--primary-light);
  font-weight: 500;
}

/* -------- Features -------- */
.features__head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-label {
  display: inline-block;
  padding: 6px 14px;
  background: var(--primary-soft);
  color: var(--primary-light);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
}

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

.feature {
  padding: 28px;
  background: linear-gradient(145deg, rgba(17, 43, 74, 0.6) 0%, rgba(13, 30, 53, 0.6) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature:hover {
  border-color: var(--border-cyan);
  box-shadow: var(--shadow), var(--glow-sm);
  transform: translateY(-4px);
}

.feature:hover::before {
  opacity: 1;
}

.feature__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--primary-soft);
  border: 1px solid var(--border-cyan);
  display: grid;
  place-items: center;
  color: var(--primary-light);
  margin-bottom: 20px;
}

.feature__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.feature__text {
  color: var(--text-muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* -------- Steps -------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step {
  text-align: center;
}

.step__num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0 auto 20px;
  box-shadow: 0 0 40px rgba(6, 182, 212, 0.4);
  position: relative;
}

.step__num::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid var(--primary-light);
  opacity: 0.3;
}

.step__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.step__text {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* -------- Pricing Preview -------- */
.pricing-preview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.plan-card {
  padding: 28px 24px;
  background: linear-gradient(145deg, rgba(17, 43, 74, 0.6) 0%, rgba(13, 30, 53, 0.6) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
}

.plan-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg), var(--glow-sm);
  transform: translateY(-6px);
}

.plan-card--popular {
  border-color: var(--primary);
  box-shadow: 0 12px 40px rgba(6, 182, 212, 0.2);
  background: linear-gradient(145deg, rgba(6, 182, 212, 0.1) 0%, rgba(13, 30, 53, 0.9) 100%);
}

.plan-card--popular::before {
  content: "محبوب";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.4);
}

html[dir="ltr"] .plan-card--popular::before {
  content: "POPULAR";
}

.plan__credits {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-light);
  line-height: 1.1;
  text-shadow: 0 0 30px rgba(6, 182, 212, 0.4);
}

.plan__label {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 4px;
  margin-bottom: 20px;
}

.plan__price {
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.plan__price-en {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary-light);
}

.plan__price-fa {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* -------- FAQ -------- */
.faq {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq__item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(17, 43, 74, 0.5) 0%, rgba(13, 30, 53, 0.5) 100%);
  overflow: hidden;
  transition: all var(--transition);
}

.faq__item[open] {
  border-color: var(--border-cyan);
  box-shadow: var(--glow-sm);
}

.faq__question {
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq__question:hover { color: var(--primary-light); }

.faq__question::-webkit-details-marker { display: none; }

.faq__question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq__item[open] .faq__question::after {
  transform: rotate(45deg);
  color: var(--primary-light);
}

.faq__answer {
  padding: 0 24px 20px;
  color: var(--text-muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* -------- Trust -------- */
.trust {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.trust__item { padding: 24px; }

.trust__num {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 8px;
  filter: drop-shadow(0 0 20px rgba(6, 182, 212, 0.3));
}

.trust__label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* -------- CTA Banner -------- */
.cta-banner {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(8, 145, 178, 0.15) 100%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 64px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--glow);
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(6, 182, 212, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-banner__title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
  position: relative;
}

.cta-banner__text {
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 560px;
  margin-inline: auto;
  position: relative;
}

.cta-banner .btn { position: relative; }

/* -------- Page Header -------- */
.page-head {
  padding: 80px 0 56px;
  background: linear-gradient(180deg, rgba(6, 182, 212, 0.05) 0%, transparent 100%);
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-head__title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #22d3ee 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-head__subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
}

/* -------- Content -------- */
.content {
  max-width: 800px;
  margin: 0 auto;
  color: var(--text);
  line-height: 1.9;
}

.content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 40px 0 16px;
  color: var(--primary-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.content h2::before {
  content: "";
  width: 4px;
  height: 24px;
  background: linear-gradient(180deg, var(--primary-light), var(--primary-dark));
  border-radius: 4px;
}

.content h2:first-child { margin-top: 0; }

.content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text);
}

.content p { margin-bottom: 16px; }

.content ul, .content ol {
  margin-bottom: 16px;
  padding-inline-start: 24px;
}

.content li { margin-bottom: 8px; }

.content strong {
  color: var(--text);
  font-weight: 700;
}

.content a {
  color: var(--primary-light);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.content a:hover {
  border-bottom-color: var(--primary-light);
}

.notice {
  padding: 20px 24px;
  background: rgba(6, 182, 212, 0.08);
  border-inline-start: 4px solid var(--primary);
  border-radius: var(--radius);
  margin-bottom: 24px;
}

.notice--warning {
  background: rgba(245, 158, 11, 0.1);
  border-inline-start-color: var(--warning);
}

/* -------- Contact -------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  padding: 24px;
  background: linear-gradient(145deg, rgba(17, 43, 74, 0.6) 0%, rgba(13, 30, 53, 0.6) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: all var(--transition);
}

.contact-card:hover {
  border-color: var(--border-cyan);
  box-shadow: var(--glow-sm);
}

.contact-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  border: 1px solid var(--border-cyan);
  color: var(--primary-light);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.contact-card__label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-card__value {
  font-weight: 600;
  color: var(--text);
  word-break: break-word;
}

/* -------- Footer -------- */
.footer {
  margin-top: auto;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 56px 0 24px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

.footer__desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer__title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text);
}

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

.footer__link {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer__link:hover { color: var(--primary-light); }

.footer__bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.footer__bottom code {
  color: var(--primary-light);
  background: var(--primary-soft);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.8rem;
}

/* -------- Mobile -------- */
@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; gap: 48px; }
  .hero__mockup { max-width: 420px; margin: 0 auto; width: 100%; }
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 40px; }
  .pricing-preview { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .trust { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .nav { display: none; }
  .nav--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    inset-inline: 0;
    background: var(--bg-alt);
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    align-items: stretch;
  }
  .nav--open .nav__link { text-align: center; }
  .mobile-toggle { display: flex; }
  .section { padding: 56px 0; }
  .hero { padding: 56px 0 48px; }
  .features__grid { grid-template-columns: 1fr; }
  .pricing-preview { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .trust { grid-template-columns: 1fr 1fr; }
  .cta-banner { padding: 40px 24px; }
  .btn--lg { width: 100%; }
}

/* -------- Utility -------- */
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }