/* Técnica de Hacking — design system */

:root {
  --bg: #030805;
  --bg-elevated: #0a120e;
  --bg-panel: #0d1611;
  --green: #39ff14;
  --green-dim: #1db800;
  --green-soft: #9dff9a;
  --green-glow: rgba(57, 255, 20, 0.35);
  --text: #e8ffe8;
  --muted: #8fb89a;
  --danger: #ff3b3b;
  --border: rgba(57, 255, 20, 0.28);
  --max: 1120px;
  --radius: 4px;
  --font-display: "Orbitron", "Syne", sans-serif;
  --font-body: "Syne", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(3, 8, 5, 0.2), rgba(3, 8, 5, 0.85)),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(57, 255, 20, 0.015) 2px,
      rgba(57, 255, 20, 0.015) 4px
    ),
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(57, 255, 20, 0.12), transparent 55%);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--green);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #fff;
}

ul {
  list-style: none;
}

/* ——— Layout ——— */
.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
}

.section-head {
  margin-bottom: 2.5rem;
  max-width: 36rem;
}

.section-head.center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  line-height: 1.2;
}

.section-lead {
  margin-top: 0.85rem;
  color: var(--muted);
  font-size: 1.05rem;
}

/* ——— Nav ——— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(3, 8, 5, 0.88);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--green);
  display: grid;
  place-items: center;
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  box-shadow: 0 0 16px var(--green-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0.55rem 0.85rem;
  letter-spacing: 0.04em;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--green);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--green);
  width: 2.6rem;
  height: 2.6rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 1.1rem;
}

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--green);
  color: #041006;
  box-shadow: 0 0 24px var(--green-glow);
}

.btn-primary:hover {
  background: #fff;
  color: #041006;
}

.btn-ghost {
  background: transparent;
  color: var(--green);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--green);
  color: #fff;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* ——— Hero ——— */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero {
  display: block;
  background: #000;
}

.hero-banner {
  width: 100%;
  line-height: 0;
  background: #000;
}

.hero-banner img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  object-position: center;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.75rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  animation: rise 0.7s ease both;
}

.hero-text {
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 36rem;
  margin: 0;
  line-height: 1.5;
}

/* ——— About ——— */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.about-copy p + p {
  margin-top: 1rem;
}

.about-copy p {
  color: var(--muted);
}

.about-panel {
  border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(13, 22, 17, 0.95), rgba(5, 12, 8, 0.95));
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.about-panel::before {
  content: "root@tecnica:~#";
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--green);
  margin-bottom: 1rem;
  opacity: 0.8;
}

.stat-list {
  display: grid;
  gap: 1rem;
}

.stat-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--green);
  letter-spacing: 0.04em;
}

.stat-item span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

/* ——— Service cards ——— */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 1.6rem 1.4rem 1.5rem;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  animation: rise 0.7s ease both;
}

.card:nth-child(2) { animation-delay: 0.08s; }
.card:nth-child(3) { animation-delay: 0.16s; }
.card:nth-child(4) { animation-delay: 0.24s; }

.card:hover {
  transform: translateY(-6px);
  border-color: var(--green);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 24px rgba(57, 255, 20, 0.12);
}

.card-icon {
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: 1.1rem;
  color: var(--green);
}

.card-icon svg {
  width: 100%;
  height: 100%;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.65rem;
  color: #fff;
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.card ul {
  display: grid;
  gap: 0.4rem;
}

.card li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--green-soft);
  padding-left: 1rem;
  position: relative;
}

.card li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--green);
}

/* ——— Courses ——— */
.course-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.course-tab {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.65rem 1rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: 0.2s ease;
}

.course-tab:hover,
.course-tab.is-active {
  color: #041006;
  background: var(--green);
  border-color: var(--green);
}

.course-panels {
  display: grid;
  gap: 1.25rem;
}

.course-panel {
  display: none;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 1.75rem;
  animation: rise 0.45s ease both;
}

.course-panel.is-active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem 2rem;
}

.course-panel h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.05em;
  color: #fff;
  grid-column: 1 / -1;
}

.course-panel p {
  color: var(--muted);
  grid-column: 1 / -1;
}

.course-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--green);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.course-list {
  display: grid;
  gap: 0.55rem;
}

.course-list li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--green-soft);
  border-left: 2px solid var(--green-dim);
  padding-left: 0.75rem;
}

/* ——— Terminal ——— */
.terminal {
  border: 1px solid var(--border);
  background: #020604;
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  background: #07110c;
}

.terminal-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #333;
}

.terminal-dot:nth-child(1) { background: #ff5f56; }
.terminal-dot:nth-child(2) { background: #ffbd2e; }
.terminal-dot:nth-child(3) { background: #27c93f; }

.terminal-title {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.terminal-body {
  padding: 1.25rem 1.35rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--green);
  min-height: 8rem;
}

.terminal-body .line {
  margin: 0.45rem 0;
  opacity: 0;
  animation: type-in 0.01s ease forwards;
}

.terminal-body .line:nth-child(1) { animation-delay: 0.2s; }
.terminal-body .line:nth-child(2) { animation-delay: 0.7s; }
.terminal-body .line:nth-child(3) { animation-delay: 1.2s; }
.terminal-body .line:nth-child(4) { animation-delay: 1.7s; }

.cursor {
  display: inline-block;
  width: 0.55ch;
  height: 1.1em;
  background: var(--green);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

/* ——— Contact ——— */
.contact-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-info {
  border: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 1.75rem;
}

.contact-info h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  color: #fff;
}

.contact-info p {
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.contact-list {
  display: grid;
  gap: 1rem;
}

.contact-list li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--green-soft);
}

.contact-list strong {
  display: block;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}

.contact-form {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 1.75rem;
  display: grid;
  gap: 1rem;
}

.form-row {
  display: grid;
  gap: 0.4rem;
}

.form-row label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  background: #020604;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, 0.12);
}

.form-row textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--green) 50%),
    linear-gradient(135deg, var(--green) 50%, transparent 50%);
  background-position: calc(100% - 18px) 55%, calc(100% - 12px) 55%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

.form-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 0.25rem;
}

.form-actions .btn {
  min-width: 10rem;
}

/* ——— Thanks ——— */
.thanks {
  min-height: calc(100vh - 8rem);
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 1.25rem;
}

.thanks-box {
  max-width: 32rem;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 2.5rem 2rem;
}

.thanks-box h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: #fff;
  margin-bottom: 0.75rem;
}

.thanks-box p {
  color: var(--muted);
  margin-bottom: 1.75rem;
}

/* ——— Page banner (inner pages) ——— */
.page-banner {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(57, 255, 20, 0.06), transparent 70%);
}

.page-banner h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  letter-spacing: 0.04em;
  color: #fff;
}

.page-banner p {
  margin-top: 0.75rem;
  color: var(--muted);
  max-width: 36rem;
}

/* ——— Services detail ——— */
.detail-grid {
  display: grid;
  gap: 1.25rem;
}

.detail-block {
  border: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 1.75rem;
}

.detail-block h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  color: #fff;
  margin-bottom: 0.75rem;
}

.detail-block p,
.detail-block li {
  color: var(--muted);
}

.detail-block ul {
  margin-top: 1rem;
  display: grid;
  gap: 0.45rem;
}

.detail-block li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding-left: 1rem;
  position: relative;
}

.detail-block li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--green);
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.level-card {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 1.5rem;
  display: grid;
  gap: 0.85rem;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.level-card:hover {
  border-color: var(--green);
  transform: translateY(-4px);
}

.level-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #041006;
  background: var(--green);
  width: fit-content;
  padding: 0.3rem 0.55rem;
}

.level-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: #fff;
  letter-spacing: 0.04em;
}

.level-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

.level-card ul {
  display: grid;
  gap: 0.4rem;
}

.level-card li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--green-soft);
}

/* ——— Footer ——— */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 2rem;
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.socials a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.55rem 0.85rem;
}

.socials a:hover {
  color: var(--green);
  border-color: var(--green);
}

.socials svg {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
}

/* ——— CTA band ——— */
.cta-band {
  border: 1px solid var(--border);
  background:
    linear-gradient(120deg, rgba(57, 255, 20, 0.08), transparent 55%),
    var(--bg-panel);
  padding: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: #fff;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.cta-band p {
  color: var(--muted);
  max-width: 28rem;
}

/* ——— Motion ——— */
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-glow {
  from { text-shadow: 0 0 12px rgba(57, 255, 20, 0.25); }
  to { text-shadow: 0 0 32px rgba(57, 255, 20, 0.55); }
}

@keyframes blink {
  50% { opacity: 0; }
}

@keyframes type-in {
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
}

/* ——— Responsive ——— */
@media (max-width: 900px) {
  .about-grid,
  .contact-layout,
  .course-panel.is-active,
  .cards,
  .level-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: rgba(3, 8, 5, 0.97);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 0.9rem 1rem;
  }

  .cta-band,
  .footer-inner,
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}