/* ===== Variables ===== */
:root {
  --dn_bg: #EEF4F9;
  --dn_surface: #FFFFFF;
  --dn_text: #0B1B2B;
  --dn_muted: #3F5468;
  --dn_accent: #005E9C;
  --dn_accent_text: #FFFFFF;
  --dn_plate_bg: #0B1B2B;
  --dn_plate_text: #EEF4F9;
  --dn_line: #C7D6E2;
  --dn_font_head: Optima, Candara, 'Segoe UI', 'Noto Sans', sans-serif;
  --dn_font_body: Georgia, Cambria, 'Times New Roman', serif;
  --dn_radius_card: 20px;
  --dn_radius_btn: 999px;
  --dn_gap: 24px;
  --dn_pad_x: clamp(16px, 4vw, 40px);
  --dn_sec_y: clamp(64px, 9vw, 128px);
  --dn_shadow: 0 1px 2px rgb(11 27 43 / 0.06), 0 12px 32px rgb(11 27 43 / 0.08);
  --dn_ease: cubic-bezier(0.25, 0.6, 0.35, 1);
}

/* ===== Base ===== */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--dn_font_body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  line-height: 1.65;
  color: var(--dn_text);
  background-color: var(--dn_bg);
  background-image:
    radial-gradient(1200px 600px at 85% -10%, rgb(0 94 156 / 0.12), transparent 70%),
    radial-gradient(900px 500px at -10% 40%, rgb(255 255 255 / 0.85), transparent 65%),
    linear-gradient(180deg, var(--dn_bg) 0%, #E2ECF4 55%, var(--dn_bg) 100%);
  background-attachment: fixed;
  min-height: 100%;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'%3E%3C/feTurbulence%3E%3CfeColorMatrix values='0 0 0 0 0.55 0 0 0 0 0.65 0 0 0 0 0.75 0 0 0 0.05 0'%3E%3C/feColorMatrix%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'%3E%3C/rect%3E%3C/svg%3E");
  z-index: 0;
}

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

h1, h2, h3 {
  font-family: var(--dn_font_head);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

h1 { font-size: clamp(2.25rem, 3.4vw + 1.4rem, 4rem); line-height: 1.1; letter-spacing: -0.02em; margin-bottom: 20px; }
h2 { font-size: clamp(1.75rem, 1.6vw + 1.25rem, 2.5rem); line-height: 1.15; margin-bottom: 20px; }
h3 { font-size: clamp(1.2rem, 1rem + 0.6vw, 1.5rem); }

p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }

a { color: var(--dn_accent); }
a:hover { color: #004a7d; }

ul { padding-left: 1.2em; }

:focus-visible {
  outline: 3px solid var(--dn_accent);
  outline-offset: 3px;
}

/* ===== Layout ===== */
.dn_wrap {
  position: relative;
  z-index: 1;
  max-width: 1160px;
  margin: 0 auto;
  padding-inline: var(--dn_pad_x);
}

.dn_block {
  position: relative;
  z-index: 1;
  padding-block: clamp(48px, 7vw, 108px);
}

.dn_read {
  max-width: 60ch;
  color: #33475B;
}

.dn_read a { color: var(--dn_accent); }

/* ===== Skip link ===== */
.dn_skip {
  position: absolute;
  left: 16px;
  top: -64px;
  z-index: 200;
  background: var(--dn_plate_bg);
  color: var(--dn_plate_text);
  padding: 12px 20px;
  border-radius: var(--dn_radius_btn);
  font-family: var(--dn_font_head);
  text-decoration: none;
  transition: top 0.2s var(--dn_ease);
}

.dn_skip:focus { top: 12px; color: var(--dn_plate_text); }

/* ===== Header ===== */
.dn_topbar {
  position: sticky;
  top: 12px;
  z-index: 100;
  padding: 8px var(--dn_pad_x);
}

.dn_topbar_in {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  max-width: 880px;
  margin: 0 auto;
  padding: 10px 14px;
  background: rgb(255 255 255 / 0.92);
  border: 1px solid var(--dn_line);
  border-radius: var(--dn_radius_btn);
  box-shadow: var(--dn_shadow);
  backdrop-filter: blur(6px);
}

.dn_mark {
  font-family: var(--dn_font_head);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--dn_text);
  text-decoration: none;
  text-align: center;
  letter-spacing: 0.01em;
}

.dn_mark:hover { color: var(--dn_accent); }

/* ===== Burger ===== */
.dn_burger {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--dn_line);
  background: transparent;
  border-radius: var(--dn_radius_btn);
  padding: 10px 18px;
  min-height: 48px;
  font-family: var(--dn_font_head);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dn_text);
  cursor: pointer;
  transition: background-color 0.25s var(--dn_ease), color 0.25s var(--dn_ease), border-color 0.25s var(--dn_ease), transform 0.15s var(--dn_ease);
}

.dn_burger:hover { background: var(--dn_text); color: var(--dn_plate_text); border-color: var(--dn_text); }
.dn_burger:active { transform: scale(0.95); }

.dn_burger_line {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.dn_burger_line + .dn_burger_line { margin-top: 4px; }

.dn_topbar .dn_burger.is_open {
  background: var(--dn_accent);
  color: var(--dn_accent_text);
  border-color: var(--dn_accent);
}

/* ===== Buttons ===== */
.dn_pill,
.dn_pill_alt {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 24px;
  font-size: 1rem;
  border-radius: var(--dn_radius_btn);
  border: 2px solid var(--dn_text);
  background: transparent;
  color: var(--dn_text);
  font-family: var(--dn_font_head);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.25s var(--dn_ease), color 0.25s var(--dn_ease), border-color 0.25s var(--dn_ease), transform 0.15s var(--dn_ease);
}

.dn_pill:hover,
.dn_pill_alt:hover {
  background: var(--dn_text);
  color: var(--dn_plate_text);
  border-color: var(--dn_text);
}

.dn_pill:focus-visible,
.dn_pill_alt:focus-visible {
  outline: 4px solid var(--dn_accent);
  outline-offset: 3px;
}

.dn_pill:active,
.dn_pill_alt:active { transform: scale(0.95); }

.dn_pill_alt { border-color: var(--dn_plate_text); color: var(--dn_plate_text); }
.dn_pill_alt:hover { background: var(--dn_plate_text); color: var(--dn_plate_bg); border-color: var(--dn_plate_text); }

/* ===== Overlay nav ===== */
.dn_overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  background: var(--dn_plate_bg);
  color: var(--dn_plate_text);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--dn_ease), visibility 0.3s var(--dn_ease);
  overflow-y: auto;
  padding-block: 80px 48px;
}

.dn_overlay.is_open { opacity: 1; visibility: visible; }

.dn_overlay_in {
  display: grid;
  gap: 40px;
  width: 100%;
}

.dn_overlay_list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.dn_overlay_point {
  display: block;
  font-family: var(--dn_font_head);
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--dn_plate_text);
  text-decoration: none;
  padding: 8px 4px;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.45s var(--dn_ease), transform 0.45s var(--dn_ease), color 0.2s var(--dn_ease);
}

.dn_overlay.is_open .dn_overlay_point { opacity: 1; transform: none; }
.dn_overlay.is_open .dn_overlay_list li:nth-child(1) .dn_overlay_point { transition-delay: 0.05s; }
.dn_overlay.is_open .dn_overlay_list li:nth-child(2) .dn_overlay_point { transition-delay: 0.12s; }
.dn_overlay.is_open .dn_overlay_list li:nth-child(3) .dn_overlay_point { transition-delay: 0.19s; }
.dn_overlay.is_open .dn_overlay_list li:nth-child(4) .dn_overlay_point { transition-delay: 0.26s; }
.dn_overlay.is_open .dn_overlay_list li:nth-child(5) .dn_overlay_point { transition-delay: 0.33s; }
.dn_overlay.is_open .dn_overlay_list li:nth-child(6) .dn_overlay_point { transition-delay: 0.40s; }

.dn_overlay_point:hover { color: #9CC8E8; }

.dn_overlay_touch {
  border-top: 1px solid rgb(238 244 249 / 0.25);
  padding-top: 24px;
  font-size: 0.95rem;
  color: #C9D8E4;
}

.dn_overlay_touch ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.dn_overlay_touch a { color: var(--dn_plate_text); }

/* ===== Floating bar ===== */
.dn_float {
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: 16px;
  z-index: 90;
  display: none;
  justify-content: center;
  pointer-events: none;
}

.dn_float .dn_pill {
  pointer-events: auto;
  width: 100%;
  max-width: 480px;
  background: var(--dn_accent);
  border-color: var(--dn_accent);
  color: var(--dn_accent_text);
  box-shadow: var(--dn_shadow);
}

.dn_float .dn_pill:hover { background: var(--dn_text); border-color: var(--dn_text); }

/* ===== Hero ===== */
.dn_hero {
  display: flex;
  align-items: center;
  min-height: auto;
  padding-block: clamp(48px, 6vw, 88px);
}

.dn_hero_grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(24px, 3vw, 44px);
  align-items: center;
}

.dn_hero_lead {
  font-family: var(--dn_font_head);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--dn_accent);
  margin-bottom: 12px;
}

.dn_hero_title { max-width: 16ch; font-size: clamp(2.25rem, 3.4vw + 1.4rem, 4rem); }

.dn_hero_text .dn_pill { margin-top: 12px; }

.dn_hero_collage {
  position: relative;
  align-self: center;
  max-width: 460px;
  justify-self: end;
  margin-left: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: end;
  border-radius: var(--dn_radius_card);
  padding: 16px;
  border: 1px solid var(--dn_line);
  box-shadow: var(--dn_shadow);
}

.dn_spot {
  background:
    radial-gradient(circle at 20% 20%, rgb(0 94 156 / 0.10), transparent 60%),
    rgb(255 255 255 / 0.7);
}

.dn_hero_img_main,
.dn_hero_img_side {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--dn_radius_card);
}

.dn_hero_img_side {
  border-top-left-radius: 50% 50%;
  border-top-right-radius: 50% 50%;
}

html.is_ready .dn_hero_collage img { animation: dn_zoom_in 0.8s var(--dn_ease) both; }

@keyframes dn_zoom_in {
  from { transform: scale(1.04); }
  to { transform: scale(1); }
}

/* ===== Steps cards ===== */
.dn_steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 22px;
  margin-top: 28px;
}

.dn_tile {
  background: var(--dn_surface);
  border: 1px solid var(--dn_line);
  border-radius: var(--dn_radius_card);
  box-shadow: var(--dn_shadow);
  padding: 20px 24px;
  transition: transform 0.3s var(--dn_ease), box-shadow 0.3s var(--dn_ease);
}

.dn_tile:hover {
  transform: translateY(-6px);
  box-shadow: 0 1px 2px rgb(11 27 43 / 0.06), 0 18px 44px rgb(11 27 43 / 0.13);
}

.dn_step_btn {
  all: unset;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--dn_font_head);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dn_text);
  box-shadow: 0 0 0 0 transparent;
}

.dn_step_btn:focus-visible {
  outline: 3px solid var(--dn_accent);
  outline-offset: 3px;
  border-radius: 8px;
}

.dn_steps .dn_tile { min-height: 104px; }
.dn_step_no { color: var(--dn_accent); font-size: 0.9rem; }

.dn_step_body { margin-top: 12px; }

/* ===== FAQ / services accordion ===== */
.dn_qa {
  display: grid;
  gap: 14px;
  margin-top: 28px;
  max-width: 780px;
}

.dn_block > .dn_wrap > h2 + p.dn_read { max-width: 60ch; }

.dn_qa summary {
  cursor: pointer;
  font-family: var(--dn_font_head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dn_text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.dn_qa summary::-webkit-details-marker { display: none; }

.dn_qa summary::after {
  content: "";
  flex: none;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--dn_accent);
  border-bottom: 2px solid var(--dn_accent);
  transform: rotate(45deg);
  transition: transform 0.25s var(--dn_ease);
}

.dn_qa details[open] summary::after { transform: rotate(-135deg); }

.dn_qa details[open] { transform: none; }

.dn_qa .dn_read { margin-top: 14px; }

/* ===== Gallery ===== */
.dn_gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 28px;
  max-width: 860px;
}

.dn_gallery figure { margin: 0; overflow: hidden; aspect-ratio: 3 / 4; }

.dn_gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--dn_radius_card);
}

.dn_gal_tall { aspect-ratio: 3 / 4; }
.dn_gal_tall img { border-top-left-radius: 50% 50%; border-top-right-radius: 50% 50%; }
.dn_gal_wide { aspect-ratio: 3 / 4; }
.dn_gal_sq { aspect-ratio: 3 / 4; }

/* ===== Form ===== */
.dn_zapis_grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.dn_form_wrap {
  background: var(--dn_surface);
  border: 1px solid var(--dn_line);
  border-radius: var(--dn_radius_card);
  box-shadow: var(--dn_shadow);
  padding: clamp(20px, 3vw, 36px);
}

.dn_form {
  display: grid;
  gap: 18px;
}

.dn_form_item { display: grid; gap: 6px; }

.dn_form_tag {
  font-family: var(--dn_font_head);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--dn_text);
}

.dn_form_box,
.dn_form_area {
  font-family: var(--dn_font_body);
  font-size: 1rem;
  color: var(--dn_text);
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--dn_line);
  border-radius: 12px;
  background: var(--dn_bg);
  transition: border-color 0.2s var(--dn_ease);
}

.dn_form_box:focus-visible,
.dn_form_area:focus-visible {
  outline: 3px solid var(--dn_accent);
  outline-offset: 2px;
  border-color: var(--dn_accent);
}

.dn_form_area { resize: vertical; min-height: 120px; }

.dn_form_box.is_wrong,
.dn_form_area.is_wrong { border-color: #B3261E; }

.dn_form_check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.95rem;
  color: var(--dn_muted);
}

.dn_form_check input {
  width: 20px;
  height: 20px;
  flex: none;
  margin-top: 2px;
  accent-color: var(--dn_accent);
}

.dn_form_hint {
  font-size: 0.95rem;
  color: var(--dn_muted);
}

.dn_form .dn_form_send { justify-self: start; }

.dn_form_send.is_sending {
  opacity: 0.6;
  pointer-events: none;
}

/* ===== Contact plate ===== */
.dn_slab {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: 24px;
  align-items: center;
  background: var(--dn_plate_bg);
  color: var(--dn_plate_text);
  border-radius: var(--dn_radius_card);
  padding: clamp(28px, 4vw, 48px);
  box-shadow: var(--dn_shadow);
}

.dn_slab h2 { color: var(--dn_plate_text); }
.dn_slab p { color: #C9D8E4; max-width: 56ch; }

.dn_slab_actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-start;
}

.dn_slab a {
  color: var(--dn_plate_text);
}

.dn_slab a:hover {
  color: #0B1B2B;
}

/* ===== Footer ===== */
.dn_base {
  position: relative;
  z-index: 1;
  background: var(--dn_plate_bg);
  color: var(--dn_plate_text);
  padding: clamp(48px, 6vw, 80px) 0 24px;
  margin-top: var(--dn_sec_y);
}

.dn_base_grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 32px;
}

.dn_base .dn_mark { color: var(--dn_plate_text); text-align: left; }
.dn_base .dn_mark:hover { color: #9CC8E8; }

.dn_base_note { color: #C9D8E4; font-size: 0.95rem; margin-top: 12px; max-width: 34ch; }

.dn_base_head {
  font-size: 1.05rem;
  color: var(--dn_plate_text);
  margin-bottom: 14px;
}

.dn_base_list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 0.95rem;
}

.dn_base_list a { color: #C9D8E4; text-decoration: none; }
.dn_base_list a:hover { color: #FFFFFF; text-decoration: underline; }

.dn_base address {
  font-style: normal;
  font-size: 0.95rem;
  color: #C9D8E4;
  display: grid;
  gap: 10px;
}

.dn_base address p { margin: 0; }

.dn_base_col > ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 0.95rem;
}

.dn_base_col > ul span { color: #9FB4C6; }

.dn_base_col > ul a { color: var(--dn_plate_text); }

.dn_base_foot {
  border-top: 1px solid rgb(238 244 249 / 0.2);
  margin-top: 40px;
  padding-top: 20px;
}

.dn_base_copy { font-size: 0.9rem; color: #9FB4C6; }

/* ===== Inner page head ===== */
.dn_page_head {
  padding-top: clamp(40px, 6vw, 72px);
}

.dn_page_head h1 { max-width: 20ch; }

/* ===== Prose ===== */
.dn_prose {
  max-width: 760px;
}

.dn_prose h2 { margin-top: 40px; }
.dn_prose h3 { margin-top: 28px; }
.dn_prose ol,
.dn_prose ul { color: var(--dn_muted); }
.dn_prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.dn_prose th,
.dn_prose td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--dn_line);
}

.dn_prose th {
  font-family: var(--dn_font_head);
  color: var(--dn_text);
}

/* ===== Contacts block ===== */
.dn_contacts ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.dn_contacts span {
  display: inline-block;
  min-width: 90px;
  font-family: var(--dn_font_head);
  font-weight: 600;
  color: var(--dn_muted);
}

/* ===== Typographic accent ===== */
.dn_accent {
  font-family: var(--dn_font_head);
  font-weight: 800;
  font-size: clamp(2.6rem, 7vw + 1rem, 7rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--dn_accent);
  display: block;
}

/* ===== Reveal ===== */
html.is_ready .dn_fade {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--dn_ease), transform 0.6s var(--dn_ease);
}

html.is_ready .dn_fade.is_shown {
  opacity: 1;
  transform: none;
}

.dn_center {
  text-align: center;
  padding-block: clamp(64px, 10vw, 128px);
}

.dn_center .dn_pill { margin-top: 16px; }

/* ===== Main offset ===== */
main {
  position: relative;
  z-index: 1;
  display: block;
  padding-top: 12px;
}

/* ===== Breakpoints ===== */
@media (max-width: 1280px) {
  .dn_hero_grid { gap: 32px; }
}

@media (max-width: 1024px) {
  .dn_hero_grid { grid-template-columns: 1fr; }
  .dn_hero_collage { max-width: 640px; justify-self: start; }
  .dn_hero_grid .dn_hero_collage { order: -1; }
  .dn_zapis_grid { grid-template-columns: 1fr; }
  .dn_base_grid { grid-template-columns: 1fr 1fr; }
  .dn_gallery { grid-template-columns: 1fr 1fr; }
  .dn_gal_wide { grid-column: span 2; }
}

@media (max-width: 768px) {
  .dn_slab { grid-template-columns: 1fr; }
  .dn_float { display: flex; }
  body { padding-bottom: 88px; }
  .dn_hero_collage { max-width: 100%; }
  .dn_steps .dn_tile { min-height: 96px; }
}

@media (max-width: 640px) {
  .dn_gallery { grid-template-columns: 1fr; max-width: 420px; }
  .dn_gal_wide { grid-column: auto; }
  .dn_base_grid { grid-template-columns: 1fr; }
  .dn_topbar .dn_pill { padding: 8px 14px; font-size: 0.9rem; }
  .dn_topbar_in { gap: 12px; }
  .dn_hero_img_main { aspect-ratio: 4 / 3; }
  .dn_hero_collage { gap: 10px; padding: 12px; }
  h1 { font-size: clamp(2.1rem, 8vw, 2.5rem); }
}

@media (max-width: 480px) {
  .dn_burger_text { display: none; }
  .dn_hero_collage { grid-template-columns: 1fr; }
  .dn_topbar_in { grid-template-columns: auto 1fr auto; gap: 8px; }
  .dn_hero_text .dn_pill { margin-top: 16px; }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html.is_ready .dn_fade {
    opacity: 1;
    transform: none;
  }
  .dn_overlay_point { opacity: 1; transform: none; }
}

/* ===== Reading rhythm ===== */
.dn_block .dn_wrap > h2 { margin-bottom: 16px; }
.dn_block .dn_wrap > .dn_read { margin-bottom: 28px; }