/* ==========================================================================
   MICHEL ALMEIDA TI — Design System
   Tema: painel de operações de rede (NOC) — verde-sinal sobre azul-quase-preto
   ========================================================================== */

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

:root {
  /* Cores base */
  --ink:        #0a0e14;
  --ink2:       #0d131b;
  --panel:      #10161f;
  --panel2:     #161d29;
  --panel3:     #1c2532;
  --line:       rgba(120, 180, 200, 0.14);
  --line-strong: rgba(120, 180, 200, 0.28);

  /* Sinal (verde-terminal) */
  --signal:      #37f2c0;
  --signal-dim:  #1f8a72;
  --signal-glow: rgba(55, 242, 192, 0.18);

  /* Acento secundário (âmbar — usado só em avisos/status) */
  --warn:       #ffb454;

  /* Erro */
  --danger:     #ff6b6b;

  /* Texto */
  --text:       #dce8ec;
  --text2:      #7c93a0;
  --text3:      #465a66;
  --white:      #f4faf9;

  /* Tipografia */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'IBM Plex Sans', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --radius:    10px;
  --radius-sm: 6px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Grade de fundo sutil, remete a "rede" / papel milimetrado */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(120,180,200,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,180,200,0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 100%);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--signal-dim); border-radius: 3px; }

a { color: inherit; }

/* ---- Cabeçalho / marca ---- */
.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 6%;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.brand img { height: 34px; width: auto; display: block; }

.brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--white);
  line-height: 1.1;
}

.brand-text span {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--signal);
  text-transform: uppercase;
}

.header-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.header-links a {
  text-decoration: none;
  color: var(--text2);
  font-size: 0.88rem;
  transition: color 0.2s;
}

.header-links a:hover { color: var(--signal); }

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--signal);
  border: 1px solid var(--line-strong);
  padding: 0.3rem 0.7rem;
  border-radius: 50px;
  letter-spacing: 0.03em;
}

.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 6px var(--signal);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ---- Main wrapper ---- */
main { position: relative; z-index: 1; flex: 1; }

/* ---- Rodapé ---- */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  padding: 2rem 6%;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text3);
}

.site-footer a { color: var(--text3); text-decoration: none; transition: color 0.2s; }
.site-footer a:hover { color: var(--signal); }

.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; list-style: none; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--signal);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: gap 0.2s;
}
.back-link:hover { gap: 0.6rem; }

/* ---- Botões ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.85rem 1.8rem;
  border-radius: 50px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s, border-color 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--signal);
  color: var(--ink);
  box-shadow: 0 0 28px var(--signal-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 42px rgba(55,242,192,0.3); }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}
.btn-secondary:hover { border-color: var(--signal); color: var(--signal); }

.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; }

/* ---- Painel (card base para todas as ferramentas) ---- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2.2rem;
}

.tool-shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 4.5rem 6% 3rem;
}

.tool-shell .panel-header { text-align: center; margin-bottom: 2rem; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 0.9rem;
}

.eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--signal);
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.tool-desc { color: var(--text2); font-size: 0.95rem; }

/* ---- Inputs ---- */
label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="file"],
select,
textarea {
  width: 100%;
  background: var(--ink2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus { border-color: var(--signal); }
input::placeholder, textarea::placeholder { color: var(--text3); }

.mono-field {
  font-family: var(--font-mono);
}

select {
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%237c93a0'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  background-size: 1.1em;
  padding-right: 2.5rem;
}

/* Slider */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--panel3);
  border-radius: 3px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  background: var(--signal);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px var(--signal-glow);
}
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  background: var(--signal);
  border: none;
  border-radius: 50%;
  cursor: pointer;
}

/* Checkbox */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text);
}
input[type="checkbox"] {
  width: 18px; height: 18px;
  accent-color: var(--signal);
  cursor: pointer;
}

input[type="file"] { padding: 0.6rem; font-size: 0.85rem; color: var(--text2); }
input[type="file"]::file-selector-button {
  background: var(--signal);
  color: var(--ink);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.55rem 1rem;
  margin-right: 1rem;
  cursor: pointer;
  font-family: var(--font-body);
}

/* ---- Feedback boxes ---- */
.feedback {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  margin-top: 0.9rem;
}
.feedback.success { background: rgba(55,242,192,0.1); border: 1px solid rgba(55,242,192,0.3); color: var(--signal); }
.feedback.error   { background: rgba(255,107,107,0.1); border: 1px solid rgba(255,107,107,0.3); color: var(--danger); }

/* ---- Data readout (usado em IP, subnet, portas) ---- */
.readout {
  background: var(--ink2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1.1rem;
  font-family: var(--font-mono);
}

.readout-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.88rem;
}
.readout-row:last-child { border-bottom: none; }
.readout-row .k { color: var(--text2); }
.readout-row .v { color: var(--white); font-weight: 600; }

/* Utilitário: copiar */
.copy-btn {
  background: transparent;
  border: none;
  color: var(--text2);
  cursor: pointer;
  transition: color 0.2s;
  display: inline-flex;
}
.copy-btn:hover { color: var(--signal); }

/* ---- Responsivo ---- */
@media (max-width: 640px) {
  .site-header { padding: 1rem 5%; }
  .header-links { gap: 1rem; }
  .status-pill span:not(.status-dot) { display: none; }
  .tool-shell { padding: 3.5rem 5% 2.5rem; }
  .panel { padding: 1.5rem; }
}

/* Reduz movimento para quem prefere */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* Foco visível para navegação por teclado */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}