/* ===================================================================
   BTT 2026 — Cyberpunk Neon
   Dark bg, neon green accent, scanlines, glitch, terminal feel.
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;600;700&display=swap');

:root {
  --bg: #020a02;
  --bg-section: #040d04;
  --card: #071007;
  --nav-bg: rgba(2, 10, 2, 0.88);
  --text: rgba(240, 255, 240, 0.92);
  --text-secondary: rgba(180, 255, 180, 0.55);
  --muted: rgba(0, 255, 136, 0.35);
  --border: rgba(0, 255, 136, 0.12);
  --border-light: rgba(0, 255, 136, 0.22);
  --accent: #00ff88;
  --accent-hover: #39ff14;
  --accent-dim: rgba(0, 255, 136, 0.08);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.8);
  --shadow-neon: 0 0 20px rgba(0, 255, 136, 0.3), 0 0 60px rgba(0, 255, 136, 0.1);
  --radius: 0px;
  --radius-lg: 2px;
  --radius-pill: 0px;
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

/* Scanlines overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 255, 136, 0.012) 2px,
    rgba(0, 255, 136, 0.012) 4px
  );
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--accent-hover);
  text-decoration: none;
  text-shadow: 0 0 10px var(--accent-hover);
}

/* ---- Container --------------------------------------------------- */
.container {
  width: min(980px, calc(100% - 48px));
  margin: 0 auto;
}

/* ---- Header / Navigation ----------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 1px 0 rgba(0, 255, 136, 0.08), 0 4px 24px rgba(0, 0, 0, 0.6);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 24px;
  padding: 12px 0;
  min-height: 80px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
  text-shadow: 0 0 20px var(--accent), 0 0 50px rgba(0, 255, 136, 0.4);
  animation: brand-flicker 8s infinite;
}

@keyframes brand-flicker {
  0%, 95%, 100% { opacity: 1; }
  96% { opacity: 0.7; }
  97% { opacity: 1; }
  98% { opacity: 0.85; }
  99% { opacity: 1; }
}

.brand:hover {
  text-decoration: none;
  color: var(--accent-hover);
  text-shadow: 0 0 30px var(--accent-hover), 0 0 80px rgba(57, 255, 20, 0.5);
}

.logo {
  width: 30px;
  height: 30px;
  display: block;
  border-radius: 0;
  object-fit: cover;
  opacity: 0.85;
  filter: hue-rotate(100deg) saturate(2);
}

.navlinks {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  flex: 1;
}

.navlinks a {
  padding: 8px 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid rgba(0, 255, 136, 0.25);
  background: rgba(0, 255, 136, 0.04);
  transition: all 0.2s var(--ease);
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  font-family: 'JetBrains Mono', monospace;
  position: relative;
  overflow: hidden;
}

/* Fill-on-hover effect */
.navlinks a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  transition: transform 0.25s var(--ease);
  z-index: -1;
}

.navlinks a:hover {
  color: #000;
  border-color: var(--accent);
  text-decoration: none;
  box-shadow: 0 0 16px rgba(0, 255, 136, 0.4);
  text-shadow: none;
}

.navlinks a:hover::before {
  transform: translateX(0);
}

.navlinks a[aria-current="page"] {
  color: #000;
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.5);
}

/* ---- Banner ------------------------------------------------------ */
.banner {
  width: min(980px, calc(100% - 48px));
  margin: 24px auto 0;
  border-radius: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  position: relative;
}

.banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0, 255, 136, 0.06) 0%, transparent 40%);
  pointer-events: none;
}

.banner img {
  width: 100%;
  height: auto;
  display: block;
  filter: saturate(0.3) brightness(0.75) sepia(0.4) hue-rotate(90deg);
  mix-blend-mode: normal;
}

/* ---- Hero -------------------------------------------------------- */
.hero {
  padding: 48px 0 44px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: start;
  text-align: left;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

/* Glitch animation on main title */
.h1 {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 900;
  line-height: 1.1;
  margin: 0 0 16px;
  color: var(--text);
  letter-spacing: -0.01em;
  text-shadow: 0 0 30px rgba(240, 255, 240, 0.2);
  animation: glitch 6s infinite;
}

@keyframes glitch {
  0%, 92%, 100% { clip-path: none; transform: none; color: var(--text); }
  93% { clip-path: inset(15% 0 70% 0); transform: translate(-3px, 0); color: #0ff; }
  94% { clip-path: inset(65% 0 5% 0);  transform: translate(3px, 0);  color: #f0f; }
  95% { clip-path: inset(40% 0 40% 0); transform: translate(-2px, 0); color: var(--text); }
  96% { clip-path: none; transform: none; }
}

h2, h3 {
  text-shadow: 0 0 18px rgba(0, 255, 136, 0.15);
}

.lead {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

/* ---- Sections ---------------------------------------------------- */
.section {
  padding: 40px 0 64px;
}

/* ---- Cards ------------------------------------------------------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0;
  box-shadow: none;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

/* Corner accent on cards */
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 20px; height: 20px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
  opacity: 0;
  transition: opacity 0.3s;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 255, 136, 0.3);
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.1), inset 0 0 24px rgba(0, 255, 136, 0.02);
}

.card:hover::before {
  opacity: 1;
}

.card-inner {
  padding: 28px;
}

/* ---- KPI grid ---------------------------------------------------- */
.kpi {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.kpi .item {
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 18px;
  background: rgba(0, 255, 136, 0.02);
  transition: border-color 0.2s, background 0.2s;
}

.kpi .item:hover {
  border-color: var(--border-light);
  background: rgba(0, 255, 136, 0.04);
}

.kpi .label {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 8px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}

.kpi .value {
  margin: 0 0 2px;
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
}

/* ---- Grid -------------------------------------------------------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

@media (max-width: 900px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ---- Typography -------------------------------------------------- */
h2, .h2 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}

h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

h4 {
  font-size: 15px;
  font-weight: 400;
  color: var(--muted);
  margin: 0 0 20px;
}

.p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

p {
  color: var(--text-secondary);
  line-height: 1.7;
}

b, strong {
  color: var(--text);
  font-weight: 700;
}

i, em {
  color: var(--accent);
  font-style: normal;
}

ul li::marker {
  color: var(--accent);
}

/* ---- Buttons ----------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: 0;
  border: 1px solid var(--border-light);
  background: transparent;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  transition: transform 0.25s var(--ease);
  z-index: -1;
}

.btn:hover {
  color: #000;
  border-color: var(--accent);
  text-decoration: none;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.35);
}

.btn:hover::before {
  transform: translateX(0);
}

/* Bouton de navigation entre pages */
.nav-btn {
  font-size: 12px !important;
  padding: 6px 14px !important;
  border-radius: 0 !important;
  background: transparent !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  font-weight: 700 !important;
}
.nav-btn:hover {
  background: var(--accent) !important;
  color: #000 !important;
  text-decoration: none;
}

.btn.primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  font-weight: 800;
  padding: 12px 24px;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.btn.primary::before { display: none; }

.btn.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  text-decoration: none;
  color: #000;
  box-shadow: 0 0 40px rgba(57, 255, 20, 0.5);
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 2px;
}

/* ---- Buttons alt ------------------------------------------------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #000;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 24px;
  border-radius: 0;
  border: 1px solid var(--accent);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.25);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #000;
  text-decoration: none;
  box-shadow: 0 0 40px rgba(57, 255, 20, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-light);
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 24px;
  border-radius: 0;
  background: transparent;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  position: relative;
  overflow: hidden;
}

.btn-secondary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  transition: transform 0.25s var(--ease);
  z-index: -1;
}

.btn-secondary:hover {
  color: #000;
  border-color: var(--accent);
  text-decoration: none;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.btn-secondary:hover::before {
  transform: translateX(0);
}

/* ---- Forms ------------------------------------------------------- */
.form {
  display: grid;
  gap: 20px;
}

.label {
  display: grid;
  gap: 6px;
  font-weight: 600;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}

input[type="text"],
textarea {
  width: 100%;
  padding: 11px 16px;
  border-radius: 0;
  border: 1px solid var(--border-light);
  background: rgba(0, 255, 136, 0.03);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.1), 0 0 16px rgba(0, 255, 136, 0.15);
}

input[type="text"]::placeholder,
textarea::placeholder {
  color: var(--muted);
}

textarea {
  min-height: 180px;
  resize: vertical;
}

input[type="file"] {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-secondary);
}

/* ---- Notice ------------------------------------------------------ */
.notice {
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-left: 3px solid var(--accent);
  background: var(--accent-dim);
  border-radius: 0;
  padding: 20px 24px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

/* ---- Activities bento grid --------------------------------------- */
.activities-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 40px 0;
}

.activity-card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 2rem;
  border-radius: 0;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

/* Scan line on hover */
.activity-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: translateX(-100%);
  transition: none;
}

.activity-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 255, 136, 0.35);
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.08), inset 0 0 20px rgba(0, 255, 136, 0.02);
}

.activity-card:hover::after {
  animation: scanline-sweep 0.6s linear;
}

@keyframes scanline-sweep {
  from { transform: translateX(-100%); }
  to   { transform: translateX(100%); }
}

.activity-card h3 {
  color: var(--accent);
  margin-bottom: 1rem;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}

.activity-card p {
  color: var(--text-secondary);
  font-size: 14px;
}

.activity-card ul {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0;
  padding-left: 1.2em;
}

.activity-card li {
  margin-bottom: 6px;
}

/* ---- Utility ----------------------------------------------------- */
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.mono {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

.small {
  font-size: 12px;
  color: var(--muted);
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.output {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  border-radius: 0;
  padding: 20px;
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
}

/* ---- Footer ------------------------------------------------------ */
.footer {
  width: min(980px, calc(100% - 48px));
  margin: 44px auto 0;
  padding: 0 0 32px;
  color: var(--muted);
  font-size: 12px;
}
.footer .container {
  width: 100%;
  margin: 0;
  border-top: 1px solid var(--border-light);
  padding-top: 18px;
}

.footer a {
  color: var(--text-secondary);
  font-size: 12px;
}

.footer a:hover {
  color: var(--accent);
  text-shadow: 0 0 8px var(--accent);
  text-decoration: none;
}

/* ---- Modal ------------------------------------------------------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal-card {
  position: relative;
  width: min(960px, calc(100% - 40px));
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: 0;
  box-shadow: var(--shadow-lg), var(--shadow-neon);
  padding: 28px;
}

/* ---- Responsive -------------------------------------------------- */
@media (max-width: 1068px) {
  .container {
    width: min(692px, calc(100% - 48px));
  }

  .h1 {
    font-size: 36px;
    line-height: 1.15;
  }
}

@media (max-width: 735px) {
  .container {
    width: calc(100% - 36px);
  }

  .nav {
    flex-direction: column;
    align-items: flex-start;
    min-height: auto;
    gap: 10px;
  }

  .navlinks {
    grid-template-columns: repeat(4, 1fr);
    width: 100%;
  }

  .navlinks a {
    padding: 6px 4px;
    font-size: 10px;
    letter-spacing: 0.06em;
  }

  .hero {
    padding: 48px 0 28px;
  }

  .h1 {
    font-size: 28px;
    line-height: 1.2;
  }

  .card-inner {
    padding: 20px;
  }

  .kpi {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .activities-grid {
    grid-template-columns: 1fr;
    padding: 24px 0;
  }
}

@media (max-width: 480px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 0;
    gap: 8px;
  }

  .navlinks {
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
  }

  .navlinks a {
    font-size: 10px;
    padding: 5px 2px;
  }

  .brand {
    font-size: 15px;
  }
}