.landing {
  font-size: 16px;
}

.container {
  width: min(1140px, calc(100% - 48px));
  margin: 0 auto;
}

/* ---------- En-tête ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 244, 239, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 60px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 20px;
  letter-spacing: -0.01em;
  font-weight: 500;
}

.site-nav {
  display: flex;
  gap: 26px;
  margin-left: 12px;
  font-size: 14.5px;
  color: var(--ink-2);
}

.site-nav a:hover {
  color: var(--ink);
}

.header-actions {
  margin-left: auto;
}

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

.hero {
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 64px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(36px, 4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 16ch;
}

.lead {
  margin: 26px 0 0;
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 58ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.hero-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  color: var(--ink-3);
  max-width: 52ch;
}

.notice {
  margin: 16px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 14px;
  max-width: 52ch;
}

.notice-error {
  border-color: #d9b3b3;
  background: var(--danger-soft);
  color: var(--danger);
}

/* Carte message */

.hero-card {
  margin: 0;
}

.card-window {
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}

.card-window-bar .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--line-strong);
}

.card-window-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
}

.card-message {
  padding: 18px 20px 20px;
}

.card-meta {
  margin: 0;
  display: grid;
  gap: 6px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.card-meta div {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 8px;
  font-size: 13.5px;
}

.card-meta dt {
  color: var(--ink-3);
}

.card-meta dd {
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-body {
  padding-top: 14px;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.55;
}

.card-body p {
  margin: 0 0 10px;
}

.card-attachment {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  padding: 8px 10px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink-2);
}

/* ---------- Bandeau de faits ---------- */

.facts {
  border-bottom: 1px solid var(--line);
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 26px 24px 26px 0;
  border-right: 1px solid var(--line);
}

.fact + .fact {
  padding-left: 24px;
}

.fact:last-child {
  border-right: 0;
}

.fact-value {
  font-family: var(--font-serif);
  font-size: 26px;
  letter-spacing: -0.01em;
}

.fact-label {
  font-size: 13.5px;
  color: var(--ink-3);
}

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

.section {
  padding: 88px 0;
  border-bottom: 1px solid var(--line);
}

.section-alt {
  background: #f0eee7;
}

.section-head {
  max-width: 62ch;
  margin-bottom: 48px;
}

.section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(30px, 3.2vw, 40px);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.section-head p {
  margin: 14px 0 0;
  font-size: 17px;
  color: var(--ink-2);
}

/* Étapes */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
}

.step {
  padding: 28px 28px 8px 0;
  border-right: 1px solid var(--line);
}

.step + .step {
  padding-left: 28px;
}

.step:last-child {
  border-right: 0;
}

.step-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-3);
}

.step h3 {
  margin: 14px 0 10px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
}

.step p {
  margin: 0;
  color: var(--ink-2);
  line-height: 1.6;
}

/* Maquette d'application */

.app-mock {
  margin: 0 0 48px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
  font-size: 13px;
}

.mock-topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 44px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.mock-wordmark {
  font-family: var(--font-serif);
  font-size: 16px;
}

.mock-domain {
  color: var(--ink-3);
  font-size: 12px;
}

.mock-spacer {
  flex: 1;
}

.mock-user {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-2);
}

.mock-avatar {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #b7c9be, #1e4b39);
}

.mock-body {
  display: grid;
  grid-template-columns: 250px 330px 1fr;
  min-height: 460px;
}

.mock-pane {
  border-right: 1px solid var(--line);
  overflow: hidden;
}

.mock-pane:last-child {
  border-right: 0;
}

.mock-pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 40px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  font-weight: 600;
  color: var(--ink-2);
}

.mock-btn {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--ink-2);
  background: var(--surface);
}

.mock-btn.is-on {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.mock-btn.is-danger {
  color: var(--danger);
}

.mock-search {
  font-weight: 400;
  color: var(--ink-4);
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-width: 120px;
}

.mock-mailboxes {
  background: var(--bg);
}

.mock-mailbox {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
}

.mock-mailbox.is-active {
  background: var(--surface);
  box-shadow: inset 3px 0 0 var(--accent);
}

.mock-mailbox .mock-label {
  font-weight: 600;
}

.mock-mailbox .mono {
  font-size: 11.5px;
  color: var(--ink-3);
}

.mock-count {
  position: absolute;
  right: 14px;
  top: 12px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.mock-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2px 10px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
}

.mock-row.is-active {
  background: var(--accent-soft);
}

.mock-row-from {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mock-row-time {
  color: var(--ink-3);
  font-size: 12px;
}

.mock-row-subject {
  grid-column: 1 / -1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mock-row.is-unread .mock-row-subject {
  font-weight: 600;
}

.mock-row-preview {
  grid-column: 1 / -1;
  color: var(--ink-3);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mock-reader-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.mock-reader-subject {
  font-family: var(--font-serif);
  font-size: 19px;
}

.mock-reader-meta {
  color: var(--ink-3);
  font-size: 12.5px;
}

.mock-reader-actions {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}

.mock-reader-body {
  padding: 20px;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
}

.mock-reader-body p {
  margin: 0 0 12px;
}

/* Fonctionnalités */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
}

.feature p {
  margin: 0;
  color: var(--ink-2);
  font-size: 14.5px;
  line-height: 1.6;
}

/* Canaux */

.channels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.channel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--surface);
}

.channel header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.channel h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
}

.channel p {
  margin: 0;
  color: var(--ink-2);
  line-height: 1.6;
}

.channel code {
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 2px;
}

.code {
  margin: 4px 0 0;
  padding: 16px 18px;
  border-radius: 4px;
  background: #1b1a15;
  color: #e6e3d6;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  overflow-x: auto;
}

.code code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}

/* Accès */

.access-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 64px;
  align-items: start;
}

.access-grid .section-head {
  margin-bottom: 0;
}

.access-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.access-list li {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  line-height: 1.6;
}

.access-list strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
  margin-bottom: 4px;
}

/* FAQ */

.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 64px;
  align-items: start;
}

.faq-grid .section-head {
  margin-bottom: 0;
}

.faq {
  border-top: 1px solid var(--line-strong);
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 40px 18px 0;
  position: relative;
  font-weight: 600;
  font-size: 16px;
}

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

.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--ink-3);
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin: 0;
  padding: 0 0 20px;
  color: var(--ink-2);
  line-height: 1.6;
}

/* Clôture */

.closing {
  padding: 96px 0;
  background: var(--ink);
  color: #f5f4ef;
}

.closing-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.closing h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(30px, 3.2vw, 40px);
  letter-spacing: -0.02em;
}

.closing p {
  margin: 0 0 12px;
  color: #b9b5a5;
  font-size: 17px;
}

.closing .btn-primary {
  background: #f5f4ef;
  border-color: #f5f4ef;
  color: var(--ink);
}

.closing .btn-primary:hover {
  background: #e5e2d8;
  border-color: #e5e2d8;
}

/* Pied de page */

.site-footer {
  padding: 26px 0;
  font-size: 13.5px;
  color: var(--ink-3);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.wordmark-small {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--ink);
}

.footer-sep {
  margin: 0 8px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a:hover {
  color: var(--ink);
}

/* ---------- Adaptatif ---------- */

@media (max-width: 1024px) {
  .site-nav {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .facts-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .fact:nth-child(2) {
    border-right: 0;
  }

  .fact:nth-child(3) {
    padding-left: 0;
    border-top: 1px solid var(--line);
  }

  .fact:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .step {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 24px 0;
  }

  .step + .step {
    padding-left: 0;
  }

  .step:last-child {
    border-bottom: 0;
  }

  .mock-body {
    grid-template-columns: 220px 1fr;
  }

  .mock-reader {
    display: none;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .channels,
  .access-grid,
  .faq-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 640px) {
  .landing {
    font-size: 15px;
  }

  .container {
    width: calc(100% - 32px);
  }

  .hero {
    padding: 56px 0 48px;
  }

  .section {
    padding: 64px 0;
  }

  .facts-grid {
    grid-template-columns: 1fr;
  }

  .fact {
    padding: 18px 0;
    border-right: 0;
    border-top: 1px solid var(--line);
  }

  .fact:first-child {
    border-top: 0;
  }

  .fact + .fact {
    padding-left: 0;
  }

  .mock-body {
    grid-template-columns: 1fr;
  }

  .mock-mailboxes {
    display: none;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .header-actions .btn {
    height: 32px;
    padding: 0 10px;
    font-size: 13px;
  }
}