/* =========================================================
   Tondak Group — brochure site
   Teal brand · IBM Plex Sans · numbered sections
   ========================================================= */

:root {
  --brand: #056283;
  --brand-600: #044e69;
  --brand-700: #033b50;
  --brand-100: #d5eaf2;
  --brand-50: #eef6f9;
  --navy: #10202c;
  --navy-2: #183040;

  --accent: var(--brand);
  --accent-hover: var(--brand-600);
  --text: #14202b;
  --muted: #4e5e6c;
  --line: #e3e9ee;
  --border: var(--line);
  --bg: #ffffff;
  --bg-soft: #f4f7f9;
  --paper: #f4f7f9;

  --success: #0d8a5a;
  --danger: #b42318;
  --radius: 16px;
  --radius-sm: 10px;
  --header-h: 108px;
  --shadow: 0 1px 2px rgba(16, 32, 44, 0.04);
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

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

img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
ul, ol { list-style: none; }
::selection { background: var(--brand-100); color: var(--navy); }

h1, h2, h3, h4, strong {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

h1, h2, h3 { line-height: 1.15; }

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 300;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
}
.skip-link:focus { top: 16px; }

.container {
  width: 100%;
  max-width: none;
  margin-inline: 0;
  padding-inline: clamp(16px, 2vw, 32px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-top: 3px solid var(--brand);
  border-bottom: 1px solid var(--line);
}
.site-header.scrolled { box-shadow: 0 8px 24px rgba(16, 32, 44, 0.06); }

.topbar {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8125rem;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 38px;
}
.topbar-list { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.topbar-list li { display: inline-flex; align-items: center; gap: 7px; }
.topbar svg { width: 14px; height: 14px; color: var(--brand); flex: none; }
.topbar a:hover { color: var(--brand); }
.topbar-link { font-weight: 600; color: var(--brand-700); }
.topbar-link:hover { text-decoration: underline; text-underline-offset: 3px; }

.navbar { min-height: 68px; display: flex; align-items: center; }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; flex: none; }
.brand-logo {
  width: 72px;
  height: 36px;
  object-fit: contain;
  object-position: left center;
}
.brand-text { display: grid; line-height: 1.15; }
.brand-text strong { font-size: 0.95rem; letter-spacing: -0.02em; }
.brand-text small { font-size: 0.72rem; font-weight: 500; color: var(--muted); letter-spacing: 0; }

.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  padding: 8px 11px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #314554;
}
.nav-links a:hover,
.nav-links a:focus-visible { color: var(--brand); background: var(--brand-50); }
.nav-login-mobile { display: none; }

.nav-actions { display: flex; align-items: center; gap: 8px; flex: none; }

.login-menu { position: relative; }
.login-menu summary { list-style: none; cursor: pointer; }
.login-menu summary::-webkit-details-marker { display: none; }
.login-menu summary::after {
  content: "";
  width: 6px;
  height: 6px;
  margin-left: 2px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}
.login-menu-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 280px;
  padding: 6px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 16px 40px rgba(16, 32, 44, 0.12);
  display: grid;
  z-index: 40;
}
.login-menu-panel a {
  padding: 11px 12px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
}
.login-menu-panel a:hover,
.login-menu-panel a:focus-visible { background: var(--brand-50); color: var(--brand); }

.icon-btn {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
}
.icon-btn:hover { background: var(--paper); }
.menu-btn { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.925rem;
  letter-spacing: -0.01em;
  line-height: 1.2;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn-sm { padding: 9px 14px; font-size: 0.85rem; }
.btn-block { width: 100%; }
.btn-primary { color: #fff; background: var(--brand); }
.btn-primary:hover { background: var(--brand-600); }
.btn-ghost { color: var(--text); background: #fff; border-color: #d5dee6; }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }

.text-link {
  color: var(--brand);
  font-weight: 600;
  border-bottom: 1px solid var(--brand-100);
}
.text-link:hover { border-color: var(--brand); }

/* ---------- Hero ---------- */
.hero {
  background: #fff;
  padding: 64px 0 0;
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
  padding-bottom: 48px;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-700);
}
.kicker span {
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  letter-spacing: 0.06em;
}
.hero h1 {
  font-size: clamp(2.4rem, 4.6vw, 3.55rem);
  letter-spacing: -0.038em;
  max-width: 14ch;
  color: var(--navy);
}
.lede, .intro {
  margin-top: 18px;
  max-width: 48ch;
  color: var(--muted);
  font-size: 1.0625rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 22px; }

.checks { display: flex; flex-wrap: wrap; gap: 10px 18px; }
.checks li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #314554;
}
.checks svg {
  width: 18px;
  height: 18px;
  padding: 3px;
  border-radius: 50%;
  color: #fff;
  background: var(--brand);
  flex: none;
}
.checks-stack { display: grid; gap: 12px; margin-top: 28px; }

.hero-panel {
  background: var(--navy);
  color: #d5e0e8;
  border-radius: 18px;
  padding: 8px 26px 22px;
}
.panel-kicker {
  padding-top: 18px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8ec8de;
}
.panel-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.panel-steps span {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #8ec8de;
  padding-top: 3px;
}
.panel-steps strong { display: block; color: #fff; font-size: 1rem; margin-bottom: 4px; }
.panel-steps p { font-size: 0.9rem; color: #b7c6d2; }
.panel-entities {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 16px;
}
.panel-entities span {
  font-size: 0.75rem;
  font-weight: 500;
  color: #d5e0e8;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.metrics div { padding: 26px 8px 28px 0; }
.metrics div + div { padding-left: 28px; border-left: 1px solid var(--line); }
.metrics dt {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 6px;
}
.metrics dd {
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--brand);
  line-height: 1;
}

/* ---------- Sections ---------- */
.section { padding: 84px 0; }
.section + .section { padding-top: 0; }
.section-row {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}
.section-index {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  padding-top: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.section-index span {
  display: block;
  margin-bottom: 6px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--brand);
}
.section h2 {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  letter-spacing: -0.034em;
  max-width: 22ch;
  margin-bottom: 8px;
}
.section-intro { margin-bottom: 28px; }
.section-intro p, .prose p { color: var(--muted); font-size: 1.05rem; max-width: 62ch; }
.prose p + p { margin-top: 14px; }
.prose strong { font-weight: 600; }

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  margin-top: 8px;
  align-items: start;
}
.journey { display: grid; gap: 0; border-top: 1px solid var(--line); }
.journey li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.journey > li > span {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--brand);
}
.journey h3 { font-size: 1rem; margin-bottom: 4px; }
.journey p { color: var(--muted); font-size: 0.92rem; }

/* ---------- Lists and boards ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--line);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.split article { background: #fff; padding: 28px 26px 8px; }
.split header { margin-bottom: 8px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.split h3 { font-size: 1.15rem; margin-bottom: 6px; }
.split header p { color: var(--muted); font-size: 0.92rem; }

.spec-list li,
.spec-board li,
.feature-list li {
  display: grid;
  gap: 3px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.spec-list li:first-child { border-top: 0; }
.spec-list strong,
.spec-board strong,
.feature-list strong,
.why-board strong,
.process strong { display: block; font-size: 0.95rem; font-weight: 600; letter-spacing: -0.015em; }
.spec-list span,
.spec-board span,
.feature-list span,
.why-board p,
.process p { color: var(--muted); font-size: 0.9rem; line-height: 1.5; }

.spec-board,
.client-board,
.why-board,
.feature-list {
  display: grid;
  background: var(--line);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.spec-board { grid-template-columns: 1fr 1fr; }
.spec-board li,
.feature-list li,
.why-board li,
.client-board li { background: #fff; }

.spec-board li { padding: 20px 22px; border-top: 0; }
.client-board { grid-template-columns: repeat(12, 1fr); }
.client-board li {
  grid-column: span 3;
  display: grid;
  place-items: center;
  min-height: 84px;
  padding: 18px 12px;
  text-align: center;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #243846;
}
.client-board li:nth-child(n + 5) { grid-column: span 4; }

.why-board { grid-template-columns: repeat(4, 1fr); }
.why-board li { padding: 22px 20px; }
.why-board li > span {
  display: block;
  margin-bottom: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--brand);
}

/* ---------- Platforms ---------- */
.platform-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}
.platform-tabs button {
  text-align: left;
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
}
.platform-tabs button strong { display: block; font-size: 1rem; margin-bottom: 3px; }
.platform-tabs button span { display: block; font-size: 0.82rem; color: var(--muted); font-weight: 500; }
.platform-tabs button:hover { border-color: #b7d3df; }
.platform-tabs button[aria-selected="true"] {
  background: var(--navy);
  border-color: var(--navy);
}
.platform-tabs button[aria-selected="true"] strong { color: #fff; }
.platform-tabs button[aria-selected="true"] span { color: #9ec4d4; }

.js .platform-panel { display: none; }
.js .platform-panel.is-active { display: block; }

.platform-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 28px 12px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding-bottom: 8px;
}
.panel-head h3 { font-size: 1.45rem; margin: 4px 0 8px; max-width: 28ch; }
.panel-head p { color: var(--muted); max-width: 62ch; }
.panel-head .kicker { margin-bottom: 0; }
.panel-head .text-link { display: inline-block; margin-top: 10px; }
.panel-actions { display: flex; gap: 8px; flex-wrap: wrap; flex: none; }

.feature-list { grid-template-columns: 1fr 1fr; margin: 20px 0 16px; }
.feature-list li { padding: 16px 18px; border-top: 0; }
.feature-list li:last-child:nth-child(odd) { grid-column: 1 / -1; }
.feature-list li.is-key { background: var(--brand-50); }

.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin: 8px 0 16px;
}
.process li {
  padding: 14px 12px;
  border-radius: 12px;
  background: var(--paper);
}
.process span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--brand);
}

/* ---------- Forms ---------- */
.two-col {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 40px;
  align-items: start;
}
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  display: grid;
  gap: 14px;
}
.form-row { display: grid; gap: 6px; }
.form-row.two { grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row.two > div { display: grid; gap: 6px; }
label { font-size: 0.8125rem; font-weight: 600; color: #314554; }
input, textarea {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #d5dee6;
  background: #fff;
  padding: 12px 13px;
  outline: none;
}
input::placeholder, textarea::placeholder { color: #7d8d9b; }
input:focus, textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 4px rgba(5, 98, 131, 0.12); }
input.is-invalid, textarea.is-invalid { border-color: var(--danger); box-shadow: 0 0 0 4px rgba(180, 35, 24, 0.08); }
textarea { resize: vertical; min-height: 120px; }
.field-error { min-height: 1em; font-size: 0.78rem; color: var(--danger); }
.upload-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 14px;
  border-radius: 10px;
  border: 1px dashed #b7c5d1;
  background: var(--paper);
  color: #314554;
  cursor: pointer;
}
.upload-btn:hover { border-color: var(--brand); background: var(--brand-50); }
.upload-btn svg { color: var(--brand); flex: none; }
.form-success { color: var(--success); font-size: 0.9rem; font-weight: 600; text-align: center; }

.contact-list { display: grid; gap: 16px; margin: 28px 0 22px; }
.contact-list li { display: grid; grid-template-columns: 20px 1fr; gap: 12px; align-items: start; }
.contact-list svg { width: 18px; height: 18px; color: var(--brand); margin-top: 2px; }
.contact-list strong { display: block; font-size: 0.82rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.contact-list a, .contact-list span { color: var(--text); }
.contact-list a:hover { color: var(--brand); }
.intro a { color: var(--brand); font-weight: 600; }

/* ---------- FAQ ---------- */
.faq-list {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}
.faq-item + .faq-item { border-top: 1px solid var(--line); }
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: transparent;
  border: 0;
  text-align: left;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.015em;
  cursor: pointer;
}
.faq-q:hover { color: var(--brand); }
.faq-q span {
  flex: none;
  width: 22px;
  height: 22px;
  position: relative;
}
.faq-q span::before,
.faq-q span::after {
  content: "";
  position: absolute;
  background: var(--brand);
  border-radius: 1px;
}
.faq-q span::before { width: 12px; height: 1.5px; left: 5px; top: 10px; }
.faq-q span::after { width: 1.5px; height: 12px; left: 10px; top: 5px; transition: transform 0.15s ease; }
.faq-item.is-open .faq-q span::after { transform: scaleY(0); }
.faq-a { padding: 0 20px 18px; color: var(--muted); }
.faq-a[hidden] { display: none; }
.faq-a a { color: var(--brand); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Footer ---------- */
.footer {
  background: var(--navy);
  color: #b7c6d2;
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.15fr;
  gap: 36px;
}
.footer .brand { padding: 8px 12px 8px 8px; border-radius: 12px; background: #fff; }
.footer-brand p { margin-top: 16px; max-width: 32ch; font-size: 0.92rem; }
.footer h2 {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 14px;
}
.footer ul { display: grid; gap: 9px; }
.footer a { color: #b7c6d2; font-size: 0.92rem; }
.footer a:hover { color: #fff; }
.legal {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: grid;
  gap: 8px;
  font-size: 0.85rem;
  color: #8ea3b3;
}
.legal strong { color: #d5e0e8; font-weight: 600; letter-spacing: 0; }
.footer-bottom {
  margin-top: 18px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: #8ea3b3;
}

section[id] { scroll-margin-top: calc(var(--header-h) + 12px); }

.back-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 12px;
  background: var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease, background 0.15s ease;
}
.back-top:hover { background: var(--brand-600); }
.back-top.is-visible { opacity: 1; visibility: visible; transform: none; }

.reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .menu-btn { display: grid; }
  .nav-links {
    position: fixed;
    inset: var(--header-h) 16px auto;
    display: grid;
    gap: 2px;
    padding: 10px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 16px 40px rgba(16, 32, 44, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    max-height: calc(100vh - var(--header-h) - 24px);
    overflow: auto;
  }
  .nav-links.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a { padding: 12px 14px; }
  .nav-actions .login-menu,
  .nav-actions .btn-sm { display: none; }
  .nav-login-mobile { display: block; font-weight: 600; color: var(--brand) !important; }

  .hero-grid,
  .about-grid,
  .two-col,
  .footer-grid,
  .section-row { grid-template-columns: 1fr; gap: 20px; }
  .section-index { position: static; display: flex; align-items: baseline; gap: 10px; padding-top: 0; }
  .section-index span { margin: 0; }
  .why-board,
  .process { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
  .topbar-list li:nth-child(n + 3) { display: none; }
}

@media (max-width: 720px) {
  .container { padding-inline: 16px; }
  .hero { padding-top: 36px; }
  .hero h1 { max-width: none; }
  .hero-actions .btn { width: 100%; }
  .section { padding: 56px 0; }
  .metrics,
  .spec-board,
  .feature-list,
  .form-row.two,
  .platform-tabs { grid-template-columns: 1fr; }
  .client-board { grid-template-columns: 1fr 1fr; }
  .client-board li,
  .client-board li:nth-child(n + 5) { grid-column: auto; }
  .client-board li:last-child { grid-column: 1 / -1; }
  .metrics div + div { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .metrics div { padding: 18px 0; }
  .panel-head,
  .panel-actions,
  .books-actions { flex-direction: column; }
  .panel-actions { width: 100%; }
  .panel-actions .btn,
  .panel-head > .btn { width: 100%; }
  .platform-panel,
  .form-card,
  .split article { padding-left: 16px; padding-right: 16px; }
  .process,
  .why-board { grid-template-columns: 1fr; }
  .journey li { grid-template-columns: 72px 1fr; }
  .footer-bottom { flex-direction: column; }
  .topbar-list li:nth-child(2) { display: none; }
  .brand-text small { display: none; }
}

/* ---------- Inner pages ---------- */
.nav-menu { position: relative; }
.nav-menu summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  cursor: pointer;
  padding: 8px 11px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #314554;
}
.nav-menu summary::-webkit-details-marker { display: none; }
.nav-menu summary::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}
.nav-menu summary:hover,
.nav-menu[open] summary { color: var(--brand); background: var(--brand-50); }
.nav-menu-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  padding: 6px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 16px 40px rgba(16, 32, 44, 0.12);
  display: grid;
  z-index: 40;
}
.nav-menu-panel a { font-weight: 600; }
.login-menu:not([open]) .login-menu-panel,
.nav-menu:not([open]) .nav-menu-panel { display: none; }
.nav-links a[aria-current="page"] { color: var(--brand); background: var(--brand-50); }

.page-head {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 48px 0 32px;
}
.page-head h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.035em;
  max-width: 16ch;
}
.tool-switch { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.tool-switch a {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  color: #314554;
}
.tool-switch a:hover { border-color: var(--brand); color: var(--brand); }
.tool-switch a[aria-current="page"] { background: var(--navy); border-color: var(--navy); color: #fff; }

.calc-layout {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 20px;
  align-items: start;
}
.calc-card,
.result-card,
.link-card,
.blog-card,
.article-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.calc-card,
.result-card { padding: 24px; }
.calc-card { display: grid; gap: 16px; }
.calc-card h2,
.result-card h2 { font-size: 1.05rem; margin-bottom: 4px; }
.field-head { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.field-head strong { font-size: 0.95rem; letter-spacing: -0.02em; }
.field-head input[type="number"] {
  width: 132px;
  text-align: right;
  padding: 8px 10px;
}
input[type="range"] {
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  accent-color: var(--brand);
}
input[type="range"]:focus { box-shadow: none; }
.calc-error { min-height: 1.2em; color: var(--danger); font-size: 0.85rem; font-weight: 600; }

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 16px;
}
.result-grid div { background: var(--paper); padding: 16px; }
.result-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.result-grid strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  letter-spacing: -0.03em;
  color: var(--navy);
}
.schedule-wrap { max-height: 380px; overflow: auto; margin-top: 18px; border: 1px solid var(--line); border-radius: 12px; }
.schedule { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.schedule th,
.schedule td { text-align: right; padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.schedule th:first-child,
.schedule td:first-child { text-align: left; }
.schedule th {
  position: sticky;
  top: 0;
  background: #fff;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}
.disclaimer { margin-top: 14px; color: var(--muted); font-size: 0.85rem; }

.link-grid,
.blog-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.blog-grid { grid-template-columns: repeat(3, 1fr); }
.link-card,
.blog-card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 22px;
  min-height: 180px;
}
.link-card:hover,
.blog-card:hover { border-color: #b7d3df; }
.link-card span,
.blog-card span {
  color: var(--brand);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.link-card strong,
.blog-card strong { font-size: 1.2rem; letter-spacing: -0.03em; }
.link-card p,
.blog-card p { color: var(--muted); font-size: 0.92rem; }

.article-card { padding: 32px; }
.article { max-width: none; }
.article p { color: var(--muted); }
.article p + p,
.article h2,
.article ul { margin-top: 14px; }
.article h2 { font-size: 1.3rem; margin-top: 28px; }
.article ul { list-style: disc; padding-left: 1.2rem; color: var(--muted); display: grid; gap: 8px; }
.article-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

@media (max-width: 980px) {
  .nav-menu-panel { position: static; min-width: 0; margin-top: 4px; box-shadow: none; }
  .calc-layout,
  .link-grid,
  .blog-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .calc-layout,
  .link-grid,
  .blog-grid,
  .result-grid { grid-template-columns: 1fr; }
  .page-head { padding-top: 32px; }
  .article-card,
  .calc-card,
  .result-card { padding: 18px; }
  .field-head { align-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}