:root {
    --primary: #0f766e;
    --primary-dark: #115e59;
    --primary-soft: #ccfbf1;
    --accent: #f59e0b;
    --ink: #16302d;
    --muted: #64748b;
    --line: #dce7e5;
    --surface: #ffffff;
    --surface-soft: #f5faf9;
    --danger: #b42318;
    --danger-soft: #fef3f2;
    --success: #067647;
    --success-soft: #ecfdf3;
    --warning: #b54708;
    --warning-soft: #fffaeb;
    --shadow: 0 18px 48px rgba(15, 64, 58, 0.09);
    --radius: 20px;
    --radius-sm: 12px;
    --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background: var(--surface-soft);
    line-height: 1.55;
}
a { color: inherit; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; }
.container { width: min(calc(100% - 32px), var(--container)); margin-inline: auto; }
.narrow { max-width: 760px; }
.section-space { padding-block: 54px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    border-bottom: 1px solid rgba(220, 231, 229, 0.85);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
}
.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; min-width: 0; }
.brand-mark {
    flex: 0 0 auto;
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: linear-gradient(145deg, var(--primary), var(--primary-dark));
    color: white;
    font-weight: 900;
    letter-spacing: -0.04em;
    box-shadow: 0 10px 24px rgba(15, 118, 110, 0.24);
}
.brand span:last-child { display: grid; min-width: 0; }
.brand strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand small { color: var(--muted); font-size: 0.78rem; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a { text-decoration: none; padding: 10px 14px; border-radius: 10px; color: #475569; font-weight: 700; }
.main-nav a:hover, .main-nav a.active { color: var(--primary-dark); background: var(--primary-soft); }
.nav-toggle { display: none; border: 1px solid var(--line); background: white; border-radius: 10px; padding: 8px 12px; color: var(--ink); }

.hero {
    overflow: hidden;
    background:
        radial-gradient(circle at 10% 20%, rgba(255,255,255,.16), transparent 24%),
        radial-gradient(circle at 85% 30%, rgba(245,158,11,.19), transparent 22%),
        linear-gradient(135deg, #0b625b, #0f766e 58%, #129186);
    color: white;
}
.hero-grid { min-height: 430px; display: grid; grid-template-columns: 1.25fr .75fr; align-items: center; gap: 64px; padding-block: 58px; }
.hero-copy h1 { font-size: clamp(2.25rem, 6vw, 4.8rem); line-height: .98; max-width: 760px; margin: 14px 0 20px; letter-spacing: -0.055em; }
.hero-copy p { max-width: 680px; font-size: 1.12rem; color: rgba(255,255,255,.86); }
.eyebrow { display: inline-flex; font-weight: 900; font-size: .76rem; letter-spacing: .13em; text-transform: uppercase; color: var(--primary); }
.hero .eyebrow, .subhero .eyebrow { color: #99f6e4; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 28px; color: rgba(255,255,255,.92); font-weight: 700; font-size: .92rem; }
.hero-card {
    min-height: 280px;
    border: 1px solid rgba(255,255,255,.24);
    border-radius: 32px;
    background: rgba(255,255,255,.12);
    backdrop-filter: blur(14px);
    padding: 28px;
    transform: rotate(2deg);
    box-shadow: 0 30px 60px rgba(0,0,0,.14);
}
.illustration-badge { display: inline-block; background: white; color: var(--primary-dark); padding: 8px 12px; border-radius: 999px; font-weight: 900; font-size: .76rem; letter-spacing: .12em; }
.illustration-lines { display: grid; gap: 12px; margin: 44px 0; }
.illustration-lines span { display: block; height: 15px; border-radius: 999px; background: rgba(255,255,255,.8); }
.illustration-lines span:nth-child(2) { width: 78%; background: rgba(255,255,255,.48); }
.illustration-lines span:nth-child(3) { width: 58%; background: rgba(255,255,255,.3); }
.illustration-people { display: flex; gap: 12px; align-items: end; }
.illustration-people i { width: 54px; height: 54px; border-radius: 50% 50% 18px 18px; background: #fef3c7; border: 5px solid rgba(255,255,255,.2); }
.illustration-people i:nth-child(2) { height: 70px; background: #bfdbfe; }
.illustration-people i:nth-child(3) { background: #fecdd3; }

.subhero { color: white; background: linear-gradient(130deg, var(--primary-dark), var(--primary)); }
.subhero-inner { min-height: 250px; display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-block: 44px; }
.subhero h1 { margin: 8px 0 10px; font-size: clamp(2rem, 5vw, 3.5rem); letter-spacing: -.045em; }
.subhero p { margin: 0; color: rgba(255,255,255,.8); }
.stat-card { min-width: 170px; padding: 24px; border: 1px solid rgba(255,255,255,.2); border-radius: 20px; background: rgba(255,255,255,.1); text-align: center; }
.stat-card strong { display: block; font-size: 2.5rem; line-height: 1; }
.stat-card span { display: block; margin-top: 8px; color: rgba(255,255,255,.78); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 34px; align-items: start; }
.page-heading { margin-bottom: 24px; }
.page-heading.compact { margin-bottom: 22px; }
.page-heading h1, .page-heading h2 { margin: 7px 0 8px; letter-spacing: -.035em; line-height: 1.08; }
.page-heading h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); }
.page-heading h2 { font-size: clamp(1.7rem, 4vw, 2.45rem); }
.page-heading p { color: var(--muted); margin: 0; }

.stack-form { display: grid; gap: 18px; }
.registration-form { padding: 28px; }
label { display: grid; gap: 8px; font-size: .94rem; font-weight: 800; color: #334155; }
label small { color: var(--muted); font-weight: 500; }
.optional { color: var(--muted); font-size: .78rem; font-weight: 600; }
input, select, textarea {
    width: 100%;
    min-height: 48px;
    border: 1px solid #cbd8d6;
    border-radius: 11px;
    background: white;
    color: var(--ink);
    padding: 11px 13px;
    outline: none;
    transition: border-color .18s ease, box-shadow .18s ease;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(15,118,110,.12); }
input::placeholder { color: #94a3b8; }
.check-row { grid-template-columns: auto 1fr; align-items: start; gap: 10px; font-weight: 600; line-height: 1.4; }
.check-row input { width: 18px; min-height: 18px; margin-top: 2px; accent-color: var(--primary); }
.form-grid { display: grid; gap: 16px; }
.form-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.form-grid.align-end { align-items: end; }
fieldset { border: 1px solid var(--line); border-radius: 16px; padding: 18px; display: grid; gap: 16px; }
legend { font-weight: 900; padding-inline: 8px; color: var(--primary-dark); }

.btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid transparent;
    border-radius: 11px;
    padding: 10px 16px;
    text-decoration: none;
    font-weight: 850;
    cursor: pointer;
    transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
}
.btn:hover:not(:disabled) { transform: translateY(-1px); }
.btn:disabled { opacity: .46; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: white; box-shadow: 0 10px 24px rgba(15,118,110,.19); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: white; color: var(--ink); border-color: var(--line); }
.btn-secondary:hover { border-color: #b6cdca; background: #f8fbfb; }
.btn-danger { background: var(--danger-soft); color: var(--danger); border-color: #fecdca; }
.btn-whatsapp { background: #16a34a; color: white; box-shadow: 0 10px 24px rgba(22,163,74,.18); }
.btn-block { width: 100%; }
.btn-small { min-height: 36px; padding: 7px 11px; font-size: .85rem; border-radius: 9px; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.button-row.center { justify-content: center; }
.text-link, .back-link { color: var(--primary-dark); font-weight: 800; text-decoration: none; }
.text-link:hover, .back-link:hover { text-decoration: underline; }
.back-link { display: inline-block; margin-top: 22px; font-size: .9rem; }

.alert { padding: 13px 15px; border-radius: 12px; border: 1px solid; margin-bottom: 14px; font-weight: 650; }
.alert-danger { color: var(--danger); background: var(--danger-soft); border-color: #fecdca; }
.alert-success { color: var(--success); background: var(--success-soft); border-color: #abefc6; }
.alert-warning { color: var(--warning); background: var(--warning-soft); border-color: #fedf89; }
.alert-info { color: #175cd3; background: #eff8ff; border-color: #b2ddff; }
.flash-stack { padding-top: 18px; }
.flash-stack .alert { margin-bottom: 8px; }

.info-card { padding: 26px; position: sticky; top: 96px; }
.info-number { width: 54px; height: 54px; display: grid; place-items: center; border-radius: 17px; background: var(--primary-soft); color: var(--primary-dark); font-size: 1.65rem; font-weight: 900; }
.info-card h3 { margin: 16px 0; font-size: 1.3rem; }
.steps-list { list-style: none; padding: 0; margin: 0 0 20px; display: grid; gap: 16px; counter-reset: steps; }
.steps-list li { display: grid; grid-template-columns: 30px 1fr; column-gap: 10px; counter-increment: steps; }
.steps-list li::before { content: counter(steps); grid-row: span 2; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: #f1f5f4; color: var(--primary-dark); font-weight: 900; font-size: .82rem; }
.steps-list strong, .steps-list span { grid-column: 2; }
.steps-list span { color: var(--muted); font-size: .88rem; }
.success-card { max-width: 760px; margin-inline: auto; padding: 40px; text-align: center; }
.success-card h2 { font-size: clamp(2rem, 5vw, 3rem); margin: 8px 0 12px; letter-spacing: -.04em; }
.success-card p { max-width: 620px; margin: 10px auto; color: var(--muted); }
.success-icon { width: 66px; height: 66px; display: grid; place-items: center; margin: 0 auto 18px; border-radius: 50%; background: var(--success-soft); color: var(--success); font-size: 2rem; font-weight: 900; }
.empty-state { padding: 34px; text-align: center; }
.empty-state h2, .empty-state h3 { margin-top: 0; }
.empty-state p { color: var(--muted); margin-bottom: 0; }

.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.toolbar > div { display: grid; }
.toolbar small { color: var(--muted); }
.monitor-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; align-items: start; }
.group-card { overflow: hidden; box-shadow: 0 12px 34px rgba(15,64,58,.07); }
.group-header { padding: 20px 22px; border-bottom: 1px solid var(--line); display: flex; align-items: start; justify-content: space-between; gap: 16px; background: linear-gradient(180deg, #fff, #fbfdfd); }
.group-header h2 { margin: 0; font-size: 1.2rem; }
.group-header p { margin: 4px 0 0; color: var(--muted); font-size: .88rem; }
.count-badge, .class-chip, .status-badge { display: inline-flex; align-items: center; border-radius: 999px; font-weight: 850; white-space: nowrap; }
.count-badge { padding: 6px 10px; color: var(--primary-dark); background: var(--primary-soft); font-size: .79rem; }
.class-chip { padding: 4px 8px; background: #f1f5f9; color: #334155; font-size: .78rem; }
.group-empty { padding: 30px; text-align: center; color: var(--muted); }
.table-scroll { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.compact-table { min-width: 430px; }
.data-table th, .data-table td { padding: 13px 15px; border-bottom: 1px solid #edf2f1; text-align: left; vertical-align: middle; }
.data-table th { background: #f8fbfa; color: #526461; font-size: .76rem; text-transform: uppercase; letter-spacing: .06em; }
.data-table tbody tr:hover { background: #fbfdfd; }
.data-table tr:last-child td { border-bottom: 0; }

.site-footer { border-top: 1px solid var(--line); background: white; color: var(--muted); }
.footer-wrap { min-height: 78px; display: flex; justify-content: space-between; align-items: center; gap: 16px; font-size: .88rem; }

.login-page, .install-page { min-height: 100vh; background: radial-gradient(circle at top left, #d8f7f1, transparent 35%), var(--surface-soft); }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 28px 16px; }
.login-card { width: min(100%, 460px); padding: 32px; }
.login-brand, .install-brand { margin-bottom: 30px; }
.install-card { padding: 34px; }
.install-card .security-note { margin-top: 26px; padding: 13px; border-radius: 12px; background: var(--warning-soft); color: var(--warning); }
.install-card code { background: rgba(0,0,0,.06); padding: 2px 5px; border-radius: 5px; }
.success-panel { text-align: center; }
.success-panel h1 { margin-bottom: 5px; }
.success-panel p { color: var(--muted); }

.admin-page { background: #f3f7f6; }
.admin-layout { min-height: 100vh; display: grid; grid-template-columns: 260px minmax(0, 1fr); }
.admin-sidebar { position: sticky; top: 0; height: 100vh; padding: 24px 18px; background: #0d3935; color: white; display: flex; flex-direction: column; z-index: 40; }
.admin-brand { padding: 0 8px; color: white; }
.admin-brand small { color: rgba(255,255,255,.62); }
.admin-nav { margin-top: 34px; display: grid; gap: 6px; }
.admin-nav a { display: flex; align-items: center; gap: 11px; padding: 11px 12px; color: rgba(255,255,255,.72); border-radius: 11px; text-decoration: none; font-weight: 750; }
.admin-nav a span { width: 22px; text-align: center; }
.admin-nav a:hover, .admin-nav a.active { background: rgba(255,255,255,.11); color: white; }
.sidebar-footer { margin-top: auto; display: grid; gap: 4px; border-top: 1px solid rgba(255,255,255,.12); padding-top: 14px; }
.sidebar-footer a { color: rgba(255,255,255,.72); text-decoration: none; padding: 8px 10px; font-size: .9rem; }
.sidebar-footer a:hover { color: white; }
.admin-main { min-width: 0; }
.admin-topbar { height: 74px; position: sticky; top: 0; z-index: 25; display: flex; justify-content: flex-end; align-items: center; gap: 12px; padding: 0 28px; background: rgba(255,255,255,.92); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.admin-topbar > div { display: grid; text-align: right; }
.admin-topbar small { color: var(--muted); font-size: .78rem; }
.sidebar-toggle { display: none; margin-right: auto; border: 1px solid var(--line); background: white; border-radius: 10px; padding: 7px 11px; font-size: 1.15rem; }
.admin-content { max-width: 1360px; margin: 0 auto; padding: 34px 30px 52px; }
.admin-heading { display: flex; justify-content: space-between; align-items: end; gap: 18px; margin-bottom: 24px; }
.admin-heading h1 { margin: 4px 0 3px; font-size: clamp(2rem, 4vw, 2.7rem); letter-spacing: -.045em; }
.admin-heading p { margin: 0; color: var(--muted); }
.stats-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; margin-bottom: 22px; }
.stat-box { min-height: 156px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: white; box-shadow: 0 12px 30px rgba(15,64,58,.06); display: grid; align-content: space-between; }
.stat-box span { color: var(--muted); font-weight: 750; }
.stat-box strong { font-size: 2.7rem; line-height: 1; letter-spacing: -.05em; }
.stat-box small { color: var(--muted); }
.admin-section { padding: 24px; box-shadow: 0 10px 28px rgba(15,64,58,.05); }
.admin-section h2 { margin-top: 0; }
.section-title { display: flex; align-items: start; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.section-title h2 { margin: 0 0 4px; }
.section-title p { margin: 0; color: var(--muted); }
.admin-two-column { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: 22px; align-items: start; }
.admin-two-column.balanced { grid-template-columns: repeat(2, minmax(0,1fr)); }
.sticky-form { position: sticky; top: 98px; }
.item-list { display: grid; gap: 12px; }
.manage-item { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding: 16px; border: 1px solid var(--line); border-radius: 14px; }
.manage-item-main { min-width: 0; }
.manage-item-main h3 { margin: 0; }
.manage-item-main p { margin: 5px 0; color: var(--muted); }
.manage-item-main small { color: var(--muted); }
.manage-item-main small a { color: var(--primary-dark); }
.item-title-row { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; }
.status-badge { padding: 4px 8px; font-size: .72rem; }
.status-badge.active { background: var(--success-soft); color: var(--success); }
.status-badge.inactive { background: #f1f5f9; color: #64748b; }
.item-actions, .table-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; }
.item-actions form, .table-actions form { margin: 0; }
.edit-panel { margin-bottom: 20px; }
.filter-bar { display: grid; grid-template-columns: minmax(220px,1fr) minmax(200px,.7fr) auto auto; gap: 10px; align-items: center; margin-bottom: 12px; }
.filter-bar label { display: block; }
.result-count { color: var(--muted); font-size: .86rem; margin-bottom: 10px; }

@media (max-width: 980px) {
    .hero-grid { grid-template-columns: 1fr; min-height: auto; gap: 30px; }
    .hero-card { display: none; }
    .content-grid { grid-template-columns: 1fr; }
    .info-card { position: static; }
    .monitor-grid { grid-template-columns: 1fr; }
    .admin-layout { grid-template-columns: 1fr; }
    .admin-sidebar { position: fixed; left: 0; transform: translateX(-105%); width: 270px; transition: transform .2s ease; box-shadow: 20px 0 40px rgba(0,0,0,.2); }
    .admin-sidebar.open { transform: translateX(0); }
    .sidebar-toggle { display: inline-flex; }
    .admin-topbar { justify-content: flex-end; }
    .admin-two-column, .admin-two-column.balanced { grid-template-columns: 1fr; }
    .sticky-form { position: static; }
}

@media (max-width: 720px) {
    .container { width: min(calc(100% - 22px), var(--container)); }
    .section-space { padding-block: 36px; }
    .nav-wrap { min-height: 66px; }
    .brand-mark { width: 40px; height: 40px; border-radius: 12px; }
    .nav-toggle { display: inline-flex; }
    .main-nav { display: none; position: absolute; left: 11px; right: 11px; top: 72px; padding: 10px; border: 1px solid var(--line); border-radius: 14px; background: white; box-shadow: var(--shadow); flex-direction: column; align-items: stretch; }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 11px 12px; }
    .hero-grid { padding-block: 48px; }
    .hero-copy h1 { font-size: clamp(2.2rem, 13vw, 3.5rem); }
    .hero-points { display: grid; gap: 8px; }
    .subhero-inner { min-height: 220px; align-items: flex-start; flex-direction: column; justify-content: center; }
    .stat-card { width: 100%; text-align: left; display: flex; align-items: baseline; gap: 10px; }
    .registration-form, .success-card, .install-card, .login-card, .admin-section { padding: 20px; }
    .success-card { padding-block: 30px; }
    .form-grid.two, .form-grid.three { grid-template-columns: 1fr; }
    .toolbar { align-items: flex-start; }
    .footer-wrap { padding-block: 20px; min-height: auto; align-items: flex-start; flex-direction: column; gap: 2px; }
    .admin-content { padding: 24px 14px 42px; }
    .admin-topbar { padding-inline: 14px; }
    .admin-heading { align-items: flex-start; flex-direction: column; }
    .stats-grid { grid-template-columns: 1fr; }
    .stat-box { min-height: 125px; }
    .manage-item { align-items: flex-start; flex-direction: column; }
    .item-actions { width: 100%; }
    .item-actions .btn, .item-actions form { flex: 1; }
    .item-actions form .btn { width: 100%; }
    .filter-bar { grid-template-columns: 1fr; }
    .filter-bar .btn { width: 100%; }
    .section-title { flex-direction: column; }
}

@media (max-width: 430px) {
    .brand strong { max-width: 190px; }
    .hero-copy h1 { font-size: 2.55rem; }
    .button-row .btn { width: 100%; }
    .group-header { flex-direction: column; }
    .monitor-toolbar { flex-direction: column; align-items: stretch; }
    .monitor-toolbar .btn { width: 100%; }
}