:root {
  --ink: #16231b;
  --muted: #647068;
  --paper: #f5f7f2;
  --card: #ffffff;
  --line: #dfe5dc;
  --green: #1e6b45;
  --green-bright: #cbed78;
  --navy: #13261d;
}

html { scroll-behavior: smooth; }
body { min-height: 100vh; margin: 0; background: var(--paper); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.shell { max-width: 1180px; }
.navbar { padding: 1.25rem 0; background: transparent; }
.navbar-brand { display: flex; align-items: center; gap: .65rem; color: var(--ink); font-weight: 750; letter-spacing: -.02em; }
.navbar-brand:hover, .nav-link:hover { color: var(--green); }
.brand-mark { display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: .55rem; background: var(--ink); color: var(--green-bright); font-size: .72rem; letter-spacing: .04em; }
.nav-link { color: var(--muted); font-size: .92rem; font-weight: 600; }
.hero { display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(3rem, 8vw, 7rem); align-items: center; min-height: 570px; padding: 4rem 0 6rem; }
.eyebrow { display: inline-block; margin-bottom: 1.25rem; color: var(--green); font-size: .72rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { max-width: 740px; margin: 0; font-size: clamp(3.1rem, 6.4vw, 6rem); line-height: .95; letter-spacing: -.065em; }
.hero-lead { max-width: 610px; margin: 2rem 0; color: var(--muted); font-size: 1.15rem; line-height: 1.7; }
.hero-actions { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.button-primary { padding: .9rem 1.25rem; border-radius: .7rem; background: var(--ink); color: white; font-size: .9rem; font-weight: 700; text-decoration: none; transition: transform .2s, background .2s; }
.button-primary:hover { color: var(--green-bright); background: var(--green); transform: translateY(-2px); }
.status-chip { display: flex; align-items: center; gap: .5rem; padding: .75rem 1rem; color: var(--muted); font-size: .84rem; font-weight: 600; }
.status-dot { width: .5rem; height: .5rem; border-radius: 50%; background: #28a565; box-shadow: 0 0 0 5px #28a56518; }
.login-card { position: relative; overflow: hidden; padding: 1.75rem; border: 1px solid #365044; border-radius: 1.35rem; background: var(--navy); color: white; box-shadow: 0 28px 70px #19362626; transform: rotate(1.5deg); }
.login-card::before { position: absolute; right: -3rem; top: -5rem; width: 12rem; height: 12rem; border-radius: 50%; background: #cbed7820; content: ""; }
.card-topline { display: flex; justify-content: space-between; margin-bottom: 2rem; color: #afc0b7; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.method-pill { padding: .25rem .5rem; border: 1px solid #cbed7850; border-radius: 999px; color: var(--green-bright); }
.login-card > code { color: var(--green-bright); font-size: 1.15rem; }
.json-sample { margin: 1.5rem 0; padding: 1.25rem; border-radius: .8rem; background: #0b1912; color: #aebcb4; font: .83rem/1.8 ui-monospace, SFMono-Regular, Menlo, monospace; }
.json-sample b { color: white; font-weight: 500; }
.token-row { display: flex; align-items: center; gap: .85rem; padding-top: 1.25rem; border-top: 1px solid #ffffff18; }
.token-icon { display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; background: var(--green-bright); color: var(--ink); font-weight: 900; }
.token-row strong, .token-row small { display: block; }
.token-row strong { font-size: .85rem; }
.token-row small { margin-top: .15rem; color: #90a198; font-size: .72rem; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-card { padding: 2rem 1.5rem 2rem 0; }
.feature-card + .feature-card { padding-left: 1.5rem; border-left: 1px solid var(--line); }
.feature-number { color: var(--green); font: 700 .7rem ui-monospace, monospace; }
.feature-card h2 { margin: 2rem 0 .8rem; font-size: 1.05rem; letter-spacing: -.02em; }
.feature-card p { margin: 0; color: var(--muted); font-size: .86rem; line-height: 1.65; }
.api-section { display: grid; grid-template-columns: .75fr 1.25fr; gap: 5rem; padding: 8rem 0; }
.api-section h2 { margin: 0 0 1.2rem; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1; letter-spacing: -.045em; }
.api-section p { color: var(--muted); line-height: 1.7; }
.api-section code { color: var(--green); }
.endpoint-list { border-top: 1px solid var(--ink); }
.endpoint-row { display: grid; grid-template-columns: 60px 1.2fr 1.7fr auto; gap: 1rem; align-items: center; padding: 1.35rem .25rem; border-bottom: 1px solid var(--line); font-size: .84rem; }
.endpoint-method { color: var(--green); font: 800 .68rem ui-monospace, monospace; }
.endpoint-row > span:nth-child(3) { color: var(--muted); }
.lock-label { padding: .28rem .55rem; border-radius: 999px; background: #dfe8dc; color: var(--green); font-size: .64rem; font-weight: 800; text-transform: uppercase; }
.site-footer { padding: 2rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .78rem; }
.footer-inner { display: flex; justify-content: space-between; }
.nav-button { border: 0; background: transparent; }
.admin-login-shell { display: grid; min-height: calc(100vh - 190px); place-items: center; padding: 4rem 0 6rem; }
.admin-login-card, .profile-card, .activity-panel { border: 1px solid var(--line); border-radius: 1.4rem; background: var(--card); box-shadow: 0 24px 70px #19362612; }
.admin-login-card { width: min(100%, 480px); padding: clamp(2rem, 6vw, 3.5rem); }
.admin-login-card h1, .profile-card h1 { margin: 0 0 .65rem; font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -.045em; }
.admin-login-card > p, .profile-card p, .dashboard-heading p { color: var(--muted); }
.admin-form { display: grid; gap: .55rem; margin-top: 2rem; }
.admin-form label { margin-top: .75rem; color: var(--ink); font-size: .78rem; font-weight: 800; }
.admin-form input { width: 100%; padding: .9rem 1rem; border: 1px solid var(--line); border-radius: .7rem; outline: none; background: #fafbf8; color: var(--ink); }
.admin-form input:focus { border-color: var(--green); box-shadow: 0 0 0 4px #1e6b4514; }
.admin-primary-button { margin-top: 1rem; padding: .9rem 1.2rem; border: 0; border-radius: .7rem; background: var(--ink); color: white; font-weight: 750; }
.admin-primary-button:hover { background: var(--green); }
.field-error, .validation-summary { color: #a21d2d; font-size: .78rem; }
.validation-summary ul { margin: .5rem 0; padding-left: 1.2rem; }
.dashboard-heading { display: flex; justify-content: space-between; gap: 2rem; align-items: end; padding: 4.5rem 0 2rem; }
.dashboard-heading h1 { margin: 0; font-size: clamp(2.6rem, 6vw, 5rem); letter-spacing: -.06em; }
.profile-summary { display: grid; grid-template-columns: auto 1fr; gap: .15rem .8rem; align-items: center; min-width: 280px; padding: 1rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--card); color: var(--ink); text-decoration: none; }
.profile-summary:hover { border-color: var(--green); color: var(--green); }
.profile-summary strong, .profile-summary small { display: block; }
.profile-summary small { margin-top: .15rem; color: var(--muted); font-size: .72rem; }
.profile-initial, .profile-avatar { display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: var(--green-bright); font-weight: 800; }
.profile-initial { grid-row: 1 / 3; width: 2.7rem; height: 2.7rem; }
.edit-label { grid-column: 2; color: var(--green); font-size: .7rem; font-weight: 800; text-transform: uppercase; }
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 1rem 0 2rem; }
.metric-card { min-height: 160px; padding: 1.4rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--card); }
.metric-card > span { color: var(--muted); font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: .07em; }
.metric-card strong { display: block; margin: 1rem 0 .25rem; font-size: 2.6rem; line-height: 1; letter-spacing: -.05em; }
.metric-card small { color: var(--green); font-weight: 700; }
.activity-panel { margin-bottom: 5rem; overflow: hidden; }
.panel-heading { display: flex; justify-content: space-between; align-items: end; padding: 1.6rem; border-bottom: 1px solid var(--line); }
.panel-heading .eyebrow { margin-bottom: .35rem; }
.panel-heading h2 { margin: 0; font-size: 1.5rem; }
.panel-actions { display: flex; align-items: center; gap: .9rem; }
.activity-count { color: var(--muted); font-size: .75rem; }
.button-secondary { padding: .65rem .9rem; border: 1px solid var(--line); border-radius: .65rem; background: var(--card); color: var(--green); font-size: .78rem; font-weight: 800; text-decoration: none; }
.button-secondary:hover { border-color: var(--green); background: #edf5eb; color: var(--green); }
.activity-table-wrap { overflow-x: auto; }
.activity-table { width: 100%; border-collapse: collapse; }
.activity-table th, .activity-table td { padding: 1rem 1.6rem; border-bottom: 1px solid var(--line); text-align: left; font-size: .82rem; white-space: nowrap; }
.activity-table th { color: var(--muted); font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; }
.activity-table td:nth-child(2) { width: 100%; white-space: normal; }
.activity-kind { display: inline-block; padding: .3rem .55rem; border-radius: 999px; background: #e8f0e5; color: var(--green); font-size: .68rem; font-weight: 800; }
.empty-activity { padding: 4rem 1.5rem; color: var(--muted); text-align: center; }
.activity-page { min-height: calc(100vh - 190px); padding: 3rem 0 6rem; }
.activity-page-heading { display: flex; justify-content: space-between; gap: 2rem; align-items: end; margin-bottom: 1.5rem; }
.activity-page-heading .eyebrow { margin-bottom: .4rem; }
.activity-page-heading h1 { margin: 0; font-size: clamp(2.4rem, 5vw, 4.2rem); letter-spacing: -.055em; }
.activity-page-heading p { margin: .65rem 0 0; color: var(--muted); }
.pagination-bar { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding: 1.25rem 1.6rem; }
.pagination-links { display: flex; gap: .4rem; flex-wrap: wrap; }
.page-link-button { display: grid; min-width: 2.35rem; height: 2.35rem; padding: 0 .65rem; place-items: center; border: 1px solid var(--line); border-radius: .55rem; background: var(--card); color: var(--ink); font-size: .78rem; font-weight: 750; text-decoration: none; }
.page-link-button:hover, .page-link-button.current { border-color: var(--green); background: var(--green); color: white; }
.page-link-button.disabled { pointer-events: none; opacity: .4; }
.pagination-summary { color: var(--muted); font-size: .78rem; }
.device-table td:first-child code { color: var(--ink); font-size: .72rem; }
.device-table strong, .device-table small, .key-status + small { display: block; }
.device-table small, .key-status + small { margin-top: .3rem; color: var(--muted); font-size: .68rem; }
.key-status { display: inline-block; padding: .32rem .58rem; border-radius: 999px; font-size: .68rem; font-weight: 800; }
.key-status.active { background: #e5f4e8; color: var(--green); }
.key-status.pending { background: #fff1d6; color: #8a5a00; }
.profile-page { min-height: calc(100vh - 190px); padding: 3rem 0 6rem; }
.back-link { display: inline-block; margin-bottom: 1.25rem; color: var(--green); font-weight: 700; text-decoration: none; }
.profile-card { max-width: 760px; padding: clamp(1.5rem, 5vw, 3rem); }
.profile-card-header { display: flex; gap: 1.2rem; align-items: center; padding-bottom: 1.5rem; border-bottom: 1px solid var(--line); }
.profile-avatar { flex: 0 0 auto; width: 4.2rem; height: 4.2rem; font-size: 1.4rem; }
.profile-card-header .eyebrow { margin-bottom: .35rem; }
.profile-card-header h1 { margin-bottom: .25rem; }
.profile-card-header p { margin: 0; }
.form-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.readonly-field { display: grid; gap: .25rem; margin-top: 1rem; padding: 1rem; border-radius: .7rem; background: var(--paper); }
.readonly-field span { color: var(--muted); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.success-message { margin-top: 1.5rem; padding: .8rem 1rem; border-radius: .7rem; background: #e5f4e8; color: var(--green); font-weight: 700; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 3rem; }
  .login-card { max-width: 560px; transform: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card:nth-child(3) { border-left: 0; }
  .api-section { grid-template-columns: 1fr; gap: 3rem; }
  .dashboard-heading { align-items: stretch; flex-direction: column; }
  .activity-page-heading { align-items: flex-start; flex-direction: column; }
  .profile-summary { min-width: 0; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .hero { min-height: auto; padding: 3rem 0 5rem; }
  .hero h1 { font-size: 3.2rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card, .feature-card + .feature-card { padding: 1.5rem 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .feature-card h2 { margin-top: 1rem; }
  .endpoint-row { grid-template-columns: 55px 1fr auto; }
  .endpoint-row > span:nth-child(3) { grid-column: 2 / 4; }
  .footer-inner { gap: 1rem; flex-direction: column; }
  .metric-grid, .form-columns { grid-template-columns: 1fr; }
  .dashboard-heading { padding-top: 2.5rem; }
  .panel-heading, .pagination-bar { align-items: flex-start; flex-direction: column; }
  .profile-card-header { align-items: flex-start; }
}