/* ============================================================
   CMEasy — download.css
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #07080f;
  --bg2:     #0c0d1a;
  --panel:   #0f1121;
  --border:  #1c1f38;
  --border2: #252847;
  --green:   #00ff88;
  --cyan:    #00d4ff;
  --purple:  #8b5cf6;
  --text:    #c8cde8;
  --text2:   #6b7299;
  --white:   #eef0fa;
  --red:     #ff5f57;
  --font-mono: 'Share Tech Mono', monospace;
  --font-head: 'Orbitron', monospace;
  --font-body: 'Rajdhani', sans-serif;
  --radius:  7px;
  --topbar:  58px;
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--green); }
ul { list-style: none; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 3px; }

.scanlines {
  pointer-events: none; position: fixed; inset: 0; z-index: 9999;
  background: repeating-linear-gradient(to bottom, transparent 0, transparent 3px, rgba(0,0,0,.06) 3px, rgba(0,0,0,.06) 4px);
}

/* ── NAVBAR ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--topbar);
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0 2rem;
  background: rgba(7,8,15,.88); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-logo { display: flex; align-items: center; gap: .6rem; color: var(--white); }
.logo-img { border-radius: 6px; object-fit: contain; }
.logo-name { font-family: var(--font-head); font-size: .8rem; color: var(--white); }
.nav-links { display: flex; gap: 1.5rem; margin-left: auto; }
.nav-links a { font-family: var(--font-body); font-weight: 600; font-size: .8rem; letter-spacing: .1em; color: var(--text2); transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--green); }

main { padding-top: var(--topbar); }

/* ── HERO ── */
.dl-hero {
  background: linear-gradient(to bottom, rgba(139,92,246,.1), transparent);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 2rem 2.5rem;
  text-align: center;
}
.dl-hero-inner { max-width: 640px; margin: 0 auto; }
.version-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  background: rgba(0,255,136,.07); border: 1px solid rgba(0,255,136,.22);
  border-radius: 99px; padding: .25rem .85rem;
  font-family: var(--font-mono); font-size: .7rem; color: var(--green);
  margin-bottom: 1rem;
}
.version-badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); animation: blink 1.4s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.2} }
.dl-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--white); font-weight: 900; margin-bottom: .8rem;
}
.dl-hero p { color: var(--text2); max-width: 520px; margin: 0 auto; }

/* ── PLANOS ── */
.plans-section { padding: 3rem 2rem 4rem; }
.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
  max-width: 1060px; margin: 0 auto;
}
.plan-card {
  background: var(--panel);
  border: 1px solid var(--border2);
  border-radius: 12px;
  padding: 2rem 1.8rem;
  position: relative;
  cursor: pointer;
  transition: border-color .25s, transform .25s, box-shadow .25s;
  display: flex; flex-direction: column; gap: .7rem;
}
.plan-card:hover { border-color: var(--cyan); transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,212,255,.12); }
.plan-card--featured {
  border-color: var(--green);
  box-shadow: 0 0 0 1px rgba(0,255,136,.15);
}
.plan-card--featured:hover { box-shadow: 0 8px 30px rgba(0,255,136,.2); }
.plan-card--selected { border-color: var(--green) !important; box-shadow: 0 0 0 2px rgba(0,255,136,.25) !important; }
.plan-badge-top {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--green); color: #000;
  font-family: var(--font-mono); font-size: .65rem; font-weight: 700;
  padding: .22rem .85rem; border-radius: 99px; white-space: nowrap;
}
.plan-icon {
  width: 46px; height: 46px;
  background: rgba(0,255,136,.07); border: 1px solid rgba(0,255,136,.18);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
}
.plan-icon svg { width: 22px; height: 22px; stroke: var(--green); }
.plan-badge {
  font-family: var(--font-mono); font-size: .68rem;
  color: var(--text2); letter-spacing: .12em; text-transform: uppercase;
}
.plan-card h2 { font-family: var(--font-head); font-size: 1.05rem; color: var(--white); }
.plan-card > p { font-size: .88rem; color: var(--text2); line-height: 1.6; }
.plan-features { display: flex; flex-direction: column; gap: .38rem; margin: .5rem 0; flex: 1; }
.plan-features li { font-size: .84rem; color: var(--text2); display: flex; align-items: flex-start; gap: .5rem; }
.feat-ok { color: var(--green); flex-shrink: 0; font-weight: 700; }
.feat-no { color: var(--border2); flex-shrink: 0; }
.plan-select-btn {
  margin-top: auto;
  width: 100%; padding: .72rem;
  background: rgba(0,255,136,.1); border: 1px solid rgba(0,255,136,.3);
  border-radius: var(--radius); color: var(--green);
  font-family: var(--font-head); font-size: .78rem; font-weight: 700;
  cursor: pointer; transition: background .2s, border-color .2s;
}
.plan-select-btn:hover { background: rgba(0,255,136,.18); border-color: var(--green); }

/* ── FORMULÁRIO ── */
.form-section { padding: 0 2rem 4rem; }
.form-inner {
  max-width: 680px; margin: 0 auto;
  background: var(--panel); border: 1px solid var(--border2);
  border-radius: 12px; padding: 2rem 2.2rem;
}
.form-header { display: flex; align-items: flex-start; gap: 1rem; margin-bottom: 1.8rem; }
.back-btn {
  display: flex; align-items: center; gap: .4rem;
  background: none; border: 1px solid var(--border2); border-radius: var(--radius);
  color: var(--text2); font-family: var(--font-body); font-size: .85rem;
  padding: .4rem .8rem; cursor: pointer; transition: border-color .2s, color .2s;
  flex-shrink: 0; margin-top: .2rem;
}
.back-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.form-header h2 { font-family: var(--font-head); font-size: 1.1rem; color: var(--white); margin-bottom: .3rem; }
.form-header p { font-size: .88rem; color: var(--text2); }
.form-header strong { color: var(--green); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.form-group { display: flex; flex-direction: column; gap: .4rem; }
.form-label {
  font-family: var(--font-mono); font-size: .7rem;
  color: var(--text2); letter-spacing: .1em; text-transform: uppercase;
}
.optional { color: var(--border2); }
.required { color: var(--green); }
.form-input {
  background: var(--bg); border: 1px solid var(--border2);
  border-radius: var(--radius); color: var(--white);
  font-family: var(--font-body); font-size: .92rem;
  padding: .62rem .9rem; width: 100%; outline: none;
  transition: border-color .2s, box-shadow .2s; appearance: none;
}
.form-input:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(0,255,136,.1); }
.form-input::placeholder { color: var(--text2); opacity: .6; }
.form-input.error { border-color: var(--red); }
.select-wrap { position: relative; }
.sel-arrow {
  position: absolute; right: .75rem; top: 50%; transform: translateY(-50%);
  width: 15px; height: 15px; stroke: var(--text2); pointer-events: none;
}
.form-input option { background: var(--panel); }
.field-error { font-family: var(--font-mono); font-size: .68rem; color: var(--red); min-height: 1em; }
.dl-btn {
  display: flex; align-items: center; justify-content: center; gap: .6rem;
  width: 100%; padding: .8rem;
  background: var(--green); color: #000;
  border: none; border-radius: var(--radius);
  font-family: var(--font-head); font-size: .88rem; font-weight: 900;
  cursor: pointer; transition: opacity .2s, transform .2s;
  margin-top: 1.2rem;
}
.dl-btn:hover { opacity: .9; transform: translateY(-1px); }
.dl-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.dl-btn--outline {
  background: transparent; border: 1px solid var(--green); color: var(--green);
}
.privacy-note { font-size: .78rem; color: var(--text2); text-align: center; margin-top: .9rem; }

/* ── SUCESSO ── */
.success-section { padding: 2rem; }
.success-inner {
  max-width: 480px; margin: 0 auto; text-align: center;
  background: var(--panel); border: 1px solid rgba(0,255,136,.25);
  border-radius: 12px; padding: 3rem 2rem;
}
.success-icon {
  width: 64px; height: 64px; border-radius: 50%;
  background: rgba(0,255,136,.1); border: 1px solid rgba(0,255,136,.3);
  display: flex; align-items: center; justify-content: center; margin: 0 auto 1.2rem;
}
.success-icon svg { width: 32px; height: 32px; stroke: var(--green); }
.success-inner h2 { font-family: var(--font-head); font-size: 1.3rem; color: var(--white); margin-bottom: .7rem; }
.success-inner p { color: var(--text2); margin-bottom: 1.5rem; }

/* ── ADMIN ── */
.admin-section {
  margin: 2rem;
  background: var(--panel); border: 1px solid var(--purple);
  border-radius: 12px; overflow: hidden;
}
.admin-inner { padding: 2rem; }
.admin-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.8rem;
}
.admin-header h2 {
  display: flex; align-items: center; gap: .6rem;
  font-family: var(--font-head); font-size: 1.1rem; color: var(--white);
}
.admin-header h2 svg { stroke: var(--purple); }
.admin-close {
  background: none; border: none; color: var(--text2);
  font-size: 1.1rem; cursor: pointer; padding: .2rem .5rem;
  transition: color .2s;
}
.admin-close:hover { color: var(--red); }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .9rem; margin-bottom: 2rem; }
.stat-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.1rem;
  text-align: center;
}
.stat-value { font-family: var(--font-head); font-size: 1.8rem; color: var(--green); }
.stat-label { font-family: var(--font-mono); font-size: .65rem; color: var(--text2); letter-spacing: .1em; margin-top: .3rem; }

/* Country chart */
.admin-subsection { margin-bottom: 2rem; }
.admin-subsection h3 { font-family: var(--font-head); font-size: .9rem; color: var(--white); margin-bottom: 1rem; }
.country-chart { display: flex; flex-direction: column; gap: .55rem; }
.country-bar-row { display: flex; align-items: center; gap: .75rem; font-size: .84rem; }
.country-name { width: 140px; color: var(--text); text-align: right; flex-shrink: 0; }
.country-bar-wrap { flex: 1; background: var(--bg2); border-radius: 4px; height: 10px; overflow: hidden; }
.country-bar-fill { height: 100%; background: var(--green); border-radius: 4px; transition: width .6s ease; }
.country-count { color: var(--text2); font-family: var(--font-mono); font-size: .72rem; width: 32px; }

/* Records table */
.records-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.records-header h3 { font-family: var(--font-head); font-size: .9rem; color: var(--white); }
.records-actions { display: flex; gap: .6rem; }
.btn-danger {
  display: flex; align-items: center; gap: .4rem;
  background: rgba(255,95,87,.1); border: 1px solid rgba(255,95,87,.35);
  border-radius: var(--radius); color: var(--red);
  font-family: var(--font-mono); font-size: .72rem;
  padding: .4rem .85rem; cursor: pointer; transition: background .2s;
}
.btn-danger:hover { background: rgba(255,95,87,.2); }
.btn-secondary {
  display: flex; align-items: center; gap: .4rem;
  background: rgba(139,92,246,.1); border: 1px solid rgba(139,92,246,.3);
  border-radius: var(--radius); color: var(--purple);
  font-family: var(--font-mono); font-size: .72rem;
  padding: .4rem .85rem; cursor: pointer; transition: background .2s;
}
.btn-secondary:hover { background: rgba(139,92,246,.2); }
.records-table-wrap { overflow-x: auto; }
.records-table {
  width: 100%; border-collapse: collapse;
  font-size: .82rem;
}
.records-table th {
  background: var(--bg2); color: var(--text2);
  font-family: var(--font-mono); font-size: .65rem;
  letter-spacing: .08em; text-transform: uppercase;
  padding: .55rem .8rem; text-align: left;
  border: 1px solid var(--border);
}
.records-table td {
  padding: .5rem .8rem; border: 1px solid var(--border);
  color: var(--white);
}
.records-table tr:nth-child(even) td { background: rgba(255,255,255,.02); }
.plan-pill {
  font-family: var(--font-mono); font-size: .65rem; padding: .18rem .55rem;
  border-radius: 4px; border: 1px solid;
}
.plan-pill.aprendizado { color: var(--cyan); border-color: rgba(0,212,255,.3); background: rgba(0,212,255,.08); }
.plan-pill.trabalho    { color: var(--green); border-color: rgba(0,255,136,.3); background: rgba(0,255,136,.08); }
.plan-pill.producao    { color: var(--purple); border-color: rgba(139,92,246,.3); background: rgba(139,92,246,.08); }
.del-row-btn {
  background: none; border: none; color: var(--border2);
  cursor: pointer; font-size: .85rem; padding: .2rem .4rem;
  transition: color .2s;
}
.del-row-btn:hover { color: var(--red); }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(7,8,15,.82); backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
}
.modal-backdrop[hidden] { display: none; }
.modal-box {
  background: var(--panel); border: 1px solid var(--border2);
  border-radius: 12px; padding: 2rem; width: 100%; max-width: 360px;
  display: flex; flex-direction: column; gap: 1rem;
}
.modal-box h3 { font-family: var(--font-head); font-size: 1rem; color: var(--white); }
.modal-box p { font-size: .88rem; color: var(--text2); }
.modal-actions { display: flex; gap: .75rem; }
.modal-actions .dl-btn { margin-top: 0; flex: 1; }
.modal-actions .btn-secondary { flex: 1; justify-content: center; }
.admin-error { color: var(--red); font-family: var(--font-mono); font-size: .75rem; }

.loading-msg { color: var(--text2); font-family: var(--font-mono); font-size: .8rem; text-align: center; padding: 1.5rem; }

/* Modal indisponível */
.modal-unavail-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(255,95,87,.1); border: 1px solid rgba(255,95,87,.3);
  display: flex; align-items: center; justify-content: center; margin: 0 auto .2rem;
}
.modal-unavail-icon svg { stroke: var(--red); }

/* Responsive */
@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .records-actions { flex-direction: column; }
}

/* ── SELETOR DE VERSÃO ── */
.version-selector-wrap {
  display: flex; justify-content: center;
  padding: 1.5rem 2rem 0;
}
.version-selector {
  display: flex; align-items: center; gap: .75rem;
  background: var(--panel); border: 1px solid var(--border2);
  border-radius: 99px; padding: .4rem .5rem .4rem .9rem;
}
.version-selector-label {
  font-family: var(--font-mono); font-size: .7rem;
  color: var(--text2); letter-spacing: .1em; text-transform: uppercase;
}
.version-tab {
  display: flex; align-items: center; gap: .45rem;
  background: none; border: 1px solid transparent;
  border-radius: 99px; padding: .38rem .95rem;
  font-family: var(--font-head); font-size: .72rem;
  color: var(--text2); cursor: pointer;
  transition: color .2s, border-color .2s, background .2s;
}
.version-tab:hover { color: var(--text); }
.version-tab.active {
  background: rgba(0,255,136,.1);
  border-color: rgba(0,255,136,.3);
  color: var(--green);
}
.version-tab[data-version="v2"].active {
  background: rgba(139,92,246,.1);
  border-color: rgba(139,92,246,.3);
  color: var(--purple);
}
.version-tab-new {
  font-family: var(--font-mono); font-size: .58rem;
  background: var(--purple); color: #fff;
  border-radius: 4px; padding: .08rem .35rem;
  letter-spacing: .05em;
}


/* ── AVISO HERO ── */
.hero-warning {
  display: flex; align-items: flex-start; gap: .55rem;
  background: rgba(255,193,7,.06); border: 1px solid rgba(255,193,7,.22);
  border-radius: var(--radius); padding: .7rem 1rem;
  margin-top: 1.2rem; text-align: left;
  font-size: .83rem; color: var(--text2); line-height: 1.5;
}
.hero-warning svg { flex-shrink: 0; stroke: #f5c518; margin-top: .1rem; }
.hero-warning strong { color: #f5c518; }

/* ── CARTÕES DE SO ── */
.os-section { padding: 3rem 2rem 4rem; }
.os-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
  max-width: 1060px; margin: 0 auto;
}
.os-card {
  background: var(--panel);
  border: 1px solid var(--border2);
  border-radius: 12px;
  padding: 2rem 1.8rem;
  display: flex; flex-direction: column; gap: .7rem;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.os-card:not(.os-card--unavailable):hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,212,255,.12);
}
.os-card--selected { border-color: var(--green) !important; box-shadow: 0 0 0 2px rgba(0,255,136,.25) !important; }
.os-card--unavailable { opacity: .75; cursor: default; }

.os-icon {
  width: 46px; height: 46px;
  background: rgba(0,255,136,.07); border: 1px solid rgba(0,255,136,.18);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
}
.os-icon svg { width: 26px; height: 26px; fill: var(--green); }
.os-icon--dim { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.1); }
.os-icon--dim svg { fill: var(--text2); }

.os-label {
  font-family: var(--font-mono); font-size: .68rem;
  color: var(--text2); letter-spacing: .12em; text-transform: uppercase;
}
.os-card h2 { font-family: var(--font-head); font-size: 1.1rem; color: var(--white); }

.os-features {
  list-style: none; display: flex; flex-direction: column; gap: .55rem;
  flex: 1; margin: .3rem 0;
}
.os-features li {
  font-size: .84rem; color: var(--text2); line-height: 1.5;
  padding-left: 1rem; position: relative;
}
.os-features li::before {
  content: '›'; position: absolute; left: 0;
  color: var(--green); font-weight: 700;
}

.os-dl-btn {
  margin-top: auto;
  display: flex; align-items: center; justify-content: center; gap: .5rem;
  width: 100%; padding: .72rem;
  background: rgba(0,255,136,.1); border: 1px solid rgba(0,255,136,.3);
  border-radius: var(--radius); color: var(--green);
  font-family: var(--font-head); font-size: .78rem; font-weight: 700;
  cursor: pointer; transition: background .2s, border-color .2s;
}
.os-dl-btn:hover { background: rgba(0,255,136,.18); border-color: var(--green); }

.os-unavail-msg {
  font-size: .86rem; color: var(--text2); line-height: 1.6; flex: 1;
}
.os-maint-link {
  margin-top: auto;
  display: flex; align-items: center; justify-content: center; gap: .45rem;
  width: 100%; padding: .72rem;
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius); color: var(--text2);
  font-family: var(--font-head); font-size: .78rem; font-weight: 700;
  cursor: pointer; transition: background .2s, border-color .2s, color .2s;
  text-decoration: none;
}
.os-maint-link:hover { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.25); color: var(--white); }

/* ── BOTÕES DO FORMULÁRIO ── */
.form-actions {
  display: flex; gap: .8rem; margin-top: 1.2rem;
}
.form-actions .dl-btn { margin-top: 0; flex: 1; }
.btn-get-code {
  display: flex; align-items: center; justify-content: center; gap: .45rem;
  flex: 1; padding: .8rem;
  background: rgba(139,92,246,.1); border: 1px solid rgba(139,92,246,.3);
  border-radius: var(--radius); color: var(--purple);
  font-family: var(--font-head); font-size: .78rem; font-weight: 700;
  cursor: pointer; transition: background .2s, border-color .2s;
}
.btn-get-code:hover { background: rgba(139,92,246,.2); border-color: var(--purple); }

/* ── MODAL: CÓDIGO ── */
.modal-x-close {
  position: absolute; top: 1rem; right: 1rem;
  background: none; border: none; color: var(--text2);
  font-size: 1rem; cursor: pointer; padding: .25rem .5rem;
  transition: color .2s; border-radius: 4px;
}
.modal-x-close:hover { color: var(--red); background: rgba(255,95,87,.1); }
.modal-box { position: relative; }

.modal-box--code { max-width: 420px; text-align: center; }
.modal-box--code h3 { font-family: var(--font-head); font-size: 1.1rem; color: var(--white); }
.modal-box--code > p { font-size: .88rem; color: var(--text2); }

.code-modal-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(0,255,136,.08); border: 1px solid rgba(0,255,136,.25);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto .9rem;
}
.code-modal-icon svg { stroke: var(--green); }

.code-display {
  display: flex; align-items: center; gap: .6rem;
  background: var(--bg); border: 1px solid rgba(0,255,136,.3);
  border-radius: var(--radius); padding: .8rem 1rem;
  margin: .9rem 0;
}
.code-display code {
  font-family: var(--font-mono); font-size: 1.05rem;
  color: var(--green); letter-spacing: .08em; flex: 1;
  word-break: break-all; text-align: left;
}
.copy-btn {
  background: none; border: none; color: var(--text2);
  cursor: pointer; padding: .25rem; border-radius: 4px;
  transition: color .2s, background .2s; flex-shrink: 0;
}
.copy-btn:hover { color: var(--green); background: rgba(0,255,136,.1); }
.copy-btn svg { display: block; }

.code-note {
  display: flex; align-items: flex-start; gap: .4rem;
  font-size: .78rem; color: var(--text2); text-align: left;
  background: rgba(0,212,255,.05); border: 1px solid rgba(0,212,255,.15);
  border-radius: var(--radius); padding: .6rem .8rem; margin-bottom: .5rem;
}
.code-note svg { stroke: var(--cyan); flex-shrink: 0; margin-top: .1rem; }

/* ── MODAL: RECUPERAR CÓDIGO ── */
.gc-result {
  margin-top: .8rem; padding: .65rem .9rem;
  border-radius: var(--radius); font-size: .83rem; font-family: var(--font-mono);
}
.gc-result--error {
  background: rgba(255,95,87,.08); border: 1px solid rgba(255,95,87,.3);
  color: var(--red);
}
.gc-result--success {
  background: rgba(0,255,136,.08); border: 1px solid rgba(0,255,136,.3);
  color: var(--green);
}

/* Responsive adicional */
@media (max-width: 640px) {
  .form-actions { flex-direction: column; }
  .os-grid { grid-template-columns: 1fr; }
}