/* ---------------------------------------------------------------------------
   Kwent website — light, blue/white theme
   --------------------------------------------------------------------------- */

:root {
  --c-primary: #3C7AFC;
  --c-primary-dark: #1F4FCC;
  --c-primary-darker: #173FA0;
  --c-primary-soft: #E8EFFF;
  --c-primary-softer: #F4F7FF;
  --c-primary-ghost: #F8FAFF;

  --c-text: #0D1B36;
  --c-text-mid: #4F5D7A;
  --c-text-soft: #7B8AA8;
  --c-text-inverse: #FFFFFF;

  --c-bg: #FFFFFF;
  --c-bg-alt: #F8FAFF;
  --c-border: #E1E8F4;
  --c-border-soft: #EEF2FA;

  --c-card-shadow: 0 1px 2px rgba(15, 31, 78, 0.05),
                   0 8px 24px rgba(15, 31, 78, 0.06);
  --c-card-shadow-lg: 0 4px 12px rgba(15, 31, 78, 0.06),
                      0 24px 48px rgba(15, 31, 78, 0.10);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-xl: 36px;

  --max-w: 1200px;
  --pad-x: clamp(20px, 4vw, 48px);

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display",
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--c-primary-dark);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--c-primary-darker);
  text-decoration: underline;
}

h1, h2, h3, h4 {
  margin: 0 0 .5em;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 700; }
h4 { font-size: 1rem; font-weight: 600; }

p { margin: 0 0 1em; color: var(--c-text-mid); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-primary-dark);
  background: var(--c-primary-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

/* ---------------------------------------------------------------------------
   Header / nav
   --------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--c-border-soft);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
}

.logo {
  display: inline-flex;
  align-items: center;
  color: var(--c-text);
}

.logo:hover { text-decoration: none; }

.logo img {
  display: block;
  height: 28px;
  width: auto;
}

.site-footer .logo img { height: 26px; }

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: var(--c-text-mid);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--c-primary-dark);
  text-decoration: none;
}

.nav a.is-active {
  color: var(--c-text);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-toggle {
  display: inline-flex;
  background: var(--c-primary-softer);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 3px;
  font-size: 0.8rem;
  font-weight: 600;
}

.lang-toggle button {
  background: transparent;
  border: 0;
  color: var(--c-text-mid);
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: all 0.15s ease;
}

.lang-toggle button.is-active {
  background: var(--c-primary);
  color: white;
  box-shadow: 0 2px 6px rgba(60, 122, 252, 0.35);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-primary);
  color: white;
  box-shadow: 0 6px 18px rgba(60, 122, 252, 0.35);
}
.btn-primary:hover {
  background: var(--c-primary-dark);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(60, 122, 252, 0.45);
}

.btn-ghost {
  background: white;
  color: var(--c-text);
  border-color: var(--c-border);
}
.btn-ghost:hover {
  border-color: var(--c-primary);
  color: var(--c-primary-dark);
  text-decoration: none;
}

.btn-sm {
  padding: 9px 16px;
  font-size: 0.88rem;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.menu-toggle svg { display: block; }

/* ---------------------------------------------------------------------------
   Hero
   --------------------------------------------------------------------------- */

.hero {
  position: relative;
  padding: clamp(60px, 9vw, 120px) 0 clamp(40px, 6vw, 80px);
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 80% 0%, rgba(60, 122, 252, 0.12), transparent 70%),
    radial-gradient(ellipse 50% 40% at 0% 30%, rgba(60, 122, 252, 0.06), transparent 70%),
    linear-gradient(180deg, var(--c-primary-ghost) 0%, white 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(60, 122, 252, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(60, 122, 252, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: -1px -1px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

.hero-text h1 {
  margin-top: 0;
  background: linear-gradient(135deg, var(--c-text) 0%, var(--c-primary-darker) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-text .lede {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--c-text-mid);
  max-width: 38em;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-bottom: 2rem;
}

.app-store-badge {
  height: 48px;
  width: auto;
}

.hero-meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  color: var(--c-text-soft);
  font-size: 0.9rem;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-art {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 480px;
}

.hero-art .phone-frame {
  position: relative;
  width: 280px;
  max-width: 100%;
  filter: drop-shadow(0 30px 60px rgba(15, 31, 78, 0.25));
  transform: rotate(-3deg);
  border-radius: 38px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.6);
}

.hero-art .phone-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-art .floating-card {
  position: absolute;
  background: white;
  border-radius: 16px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--c-card-shadow-lg);
  font-size: 0.85rem;
  color: var(--c-text);
  font-weight: 500;
}

.hero-art .floating-card .icon {
  width: 36px;
  height: 36px;
  background: var(--c-primary-soft);
  color: var(--c-primary-dark);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hero-art .floating-card-1 {
  top: 12%;
  left: -8%;
  animation: float 6s ease-in-out infinite;
}
.hero-art .floating-card-2 {
  bottom: 14%;
  right: -6%;
  animation: float 7s ease-in-out infinite 1s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------------------------------------------------------------------------
   Sections
   --------------------------------------------------------------------------- */

section {
  padding: clamp(60px, 8vw, 110px) 0;
}

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-head p {
  font-size: 1.1rem;
  color: var(--c-text-mid);
}

/* ---------------------------------------------------------------------------
   Highlight blocks (AI + Knowledge base)
   --------------------------------------------------------------------------- */

.highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.highlight {
  position: relative;
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-border);
  padding: 40px;
  overflow: hidden;
  box-shadow: var(--c-card-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.highlight:hover {
  transform: translateY(-3px);
  box-shadow: var(--c-card-shadow-lg);
}

.highlight::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(60,122,252,0.18) 0%, transparent 70%);
  pointer-events: none;
}

.highlight .pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--c-primary-soft);
  color: var(--c-primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: 999px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.highlight h3 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.highlight p {
  font-size: 1rem;
  color: var(--c-text-mid);
  margin-bottom: 18px;
}

.highlight ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.highlight ul li {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  color: var(--c-text);
  font-size: 0.96rem;
}

.highlight ul li::before {
  content: "✓";
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--c-primary);
  color: white;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

/* ---------------------------------------------------------------------------
   Feature grid
   --------------------------------------------------------------------------- */

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

.feature {
  background: white;
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--c-border-soft);
  transition: all 0.2s ease;
}

.feature:hover {
  border-color: var(--c-primary);
  transform: translateY(-2px);
  box-shadow: var(--c-card-shadow);
}

.feature .feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--c-primary-soft);
  color: var(--c-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.feature h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.feature p {
  font-size: 0.95rem;
  margin: 0;
}

/* ---------------------------------------------------------------------------
   Screenshot gallery
   --------------------------------------------------------------------------- */

.gallery {
  position: relative;
}

.device-tabs {
  display: inline-flex;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 4px;
  margin: 0 auto 40px;
  gap: 2px;
}

.device-tabs-wrap {
  display: flex;
  justify-content: center;
}

.device-tab {
  padding: 10px 22px;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--c-text-mid);
  border-radius: 999px;
  transition: all 0.15s ease;
}

.device-tab.is-active {
  background: var(--c-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(60, 122, 252, 0.35);
}

.screenshot-strip {
  position: relative;
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 24px 4px 32px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--c-primary) transparent;
}

.screenshot-strip::-webkit-scrollbar {
  height: 8px;
}
.screenshot-strip::-webkit-scrollbar-track {
  background: var(--c-border-soft);
  border-radius: 999px;
}
.screenshot-strip::-webkit-scrollbar-thumb {
  background: var(--c-primary);
  border-radius: 999px;
}

.shot {
  flex-shrink: 0;
  scroll-snap-align: center;
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border-soft);
  padding: 6px;
  box-shadow: var(--c-card-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.shot:hover {
  transform: translateY(-4px);
  box-shadow: var(--c-card-shadow-lg);
}

.shot img {
  display: block;
  height: 560px;
  width: auto;
  border-radius: 10px;
}

.shot[data-device="iPad"] img,
.shot[data-device="Mac"] img {
  height: 460px;
}

/* ---------------------------------------------------------------------------
   CTA block
   --------------------------------------------------------------------------- */

.cta-block {
  background: linear-gradient(135deg, var(--c-primary-darker) 0%, var(--c-primary) 100%);
  color: white;
  border-radius: var(--radius-xl);
  padding: clamp(40px, 6vw, 72px);
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 0 auto;
}

.cta-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.15), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(255,255,255,0.1), transparent 40%);
  pointer-events: none;
}

.cta-block h2,
.cta-block p {
  position: relative;
  color: white;
}
.cta-block p {
  opacity: 0.85;
  font-size: 1.1rem;
  max-width: 540px;
  margin: 0 auto 28px;
}
.cta-block .btn-primary {
  background: white;
  color: var(--c-primary-darker);
  box-shadow: 0 8px 28px rgba(0,0,0,0.25);
  position: relative;
}
.cta-block .btn-primary:hover {
  background: var(--c-primary-soft);
  color: var(--c-primary-darker);
}

/* ---------------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------------- */

.site-footer {
  background: white;
  border-top: 1px solid var(--c-border-soft);
  padding: 56px 0 32px;
  color: var(--c-text-mid);
  font-size: 0.92rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { max-width: 28em; font-size: 0.92rem; }

.footer-col h4 {
  color: var(--c-text);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  color: var(--c-text-mid);
}
.footer-col a:hover {
  color: var(--c-primary-dark);
}

.footer-bottom {
  border-top: 1px solid var(--c-border-soft);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--c-text-soft);
  font-size: 0.85rem;
}

/* ---------------------------------------------------------------------------
   Subpages — privacy, support
   --------------------------------------------------------------------------- */

.page-hero {
  background:
    radial-gradient(ellipse 60% 50% at 80% 0%, rgba(60, 122, 252, 0.12), transparent 70%),
    linear-gradient(180deg, var(--c-primary-ghost) 0%, white 100%);
  padding: clamp(60px, 8vw, 110px) 0 clamp(36px, 5vw, 60px);
  text-align: center;
}

.page-hero h1 {
  background: linear-gradient(135deg, var(--c-text) 0%, var(--c-primary-darker) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-hero p { font-size: 1.1rem; max-width: 36em; margin: 0 auto; }

.legal {
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 80px) var(--pad-x);
}

.legal h2 {
  margin-top: 2.5rem;
  font-size: 1.4rem;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--c-border-soft);
}

.legal h3 {
  margin-top: 1.5rem;
  font-size: 1.05rem;
}

.legal p, .legal li {
  color: var(--c-text-mid);
  font-size: 0.98rem;
  line-height: 1.7;
}

.legal ul { padding-left: 1.25rem; }

.legal .meta {
  color: var(--c-text-soft);
  font-size: 0.88rem;
  margin-bottom: 2rem;
}

/* ---------------------------------------------------------------------------
   Support form
   --------------------------------------------------------------------------- */

.support-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 80px) var(--pad-x);
  align-items: start;
}

.support-info {
  background: white;
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--c-card-shadow);
}

.support-info h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.support-channels {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.support-channels li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.support-channels .ico {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--c-primary-soft);
  color: var(--c-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.support-channels strong {
  display: block;
  color: var(--c-text);
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.support-channels .desc {
  font-size: 0.88rem;
  color: var(--c-text-mid);
}

.support-form {
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--c-card-shadow);
}

.support-form h2 {
  font-size: 1.6rem;
  margin-bottom: 6px;
}

.support-form .form-lede {
  color: var(--c-text-mid);
  margin-bottom: 24px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.form-row label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-text);
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font: inherit;
  font-size: 0.96rem;
  color: var(--c-text);
  background: white;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 4px rgba(60, 122, 252, 0.15);
}

.form-row textarea {
  resize: vertical;
  min-height: 140px;
}

.form-row .hint {
  font-size: 0.82rem;
  color: var(--c-text-soft);
}

.form-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 8px;
}

.form-feedback {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--c-primary-soft);
  color: var(--c-primary-darker);
  font-size: 0.92rem;
  display: none;
}

.form-feedback.is-visible { display: block; }

/* ---------------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------------- */

@media (max-width: 980px) {
  .hero .container,
  .support-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-art { min-height: 420px; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .highlights { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .menu-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--c-border-soft);
    flex-direction: column;
    padding: 16px 20px;
    gap: 16px;
    align-items: flex-start;
    display: none;
    box-shadow: var(--c-card-shadow);
  }
  .nav.is-open { display: flex; }
  .features { grid-template-columns: 1fr; }
  .shot img { height: 460px; }
  .shot[data-device="iPad"] img,
  .shot[data-device="Mac"] img { height: 360px; }
  .footer-bottom { justify-content: center; text-align: center; }
}

[hidden] { display: none !important; }