/* ---- PARTICLE CANVAS ---- */
#particles {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ---- SECTIONS ---- */
section {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 3rem 3rem;
}

main > section:first-of-type {
  padding-top: 10rem;
}

#about { align-items: flex-start; padding-top: calc(10rem + 12px); padding-bottom: 2rem; min-height: 0; }

#engage { padding-top: 2rem; min-height: 0; align-items: flex-start; }

.section-inner {
  max-width: 900px;
  width: 100%;
}

/* ---- HERO ---- */
#hero {
  min-height: 100vh;
  text-align: center;
  flex-direction: column;
}

.hero-chat {
  position: relative;
  display: inline-block;
  background: #181818;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem 2rem 1.5rem;
  margin-bottom: 4rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: clamp(0.64rem, 1.5vw, 0.825rem);
  line-height: 1.8;
  min-width: 560px;
  max-width: 100%;
  height: 6.75rem;
  margin-left: auto;
  margin-right: auto;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.3s forwards;
  overflow: hidden;
}

.chat-tts-toggle {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.3rem;
  line-height: 0;
  transition: color 0.3s, border-color 0.3s;
}

.chat-tts-toggle:hover { color: var(--accent); border-color: var(--accent); }
.chat-tts-toggle.active { color: var(--accent); border-color: var(--accent-dim); }

.chat-line { white-space: normal; word-wrap: break-word; }
.chat-role-user { color: var(--accent); }
.chat-role-assistant { color: var(--accent); }
.chat-text { color: var(--text-primary); }

.chat-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: blink 0.6s step-end infinite;
}

.thinking-dots span {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  margin: 0 2px;
  opacity: 0;
  vertical-align: middle;
}

.thinking-dots span:nth-child(1) { animation: dot-pulse 1.2s 0s infinite; }
.thinking-dots span:nth-child(2) { animation: dot-pulse 1.2s 0.2s infinite; }
.thinking-dots span:nth-child(3) { animation: dot-pulse 1.2s 0.4s infinite; }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes dot-pulse {
  0%, 60%, 100% { opacity: 0; transform: scale(0.8); }
  30% { opacity: 1; transform: scale(1); }
}

.hero-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.5rem, 10vw, 8rem);
  letter-spacing: -0.03em;
  line-height: 0.95;
  width: fit-content;
  margin: 0 auto 2rem;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.5s forwards;
}

.hero-name .ok { color: var(--text-primary); }
.hero-name .robot { color: var(--accent); position: relative; }

.hero-tagline {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.6;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.8s forwards;
}

.hero-tagline em { color: var(--text-primary); font-style: normal; }

.hero-descriptor {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 820px;
  margin: 1.75rem auto 0;
  opacity: 0;
  animation: fadeUp 0.8s ease 1s forwards;
}

.thesis-body {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  font-weight: 300;
  margin-bottom: 1.25rem;
}

.thesis-body em { color: var(--text-primary); font-style: italic; }

.scroll-hint {
  position: absolute;
  bottom: calc(0.75rem - 30px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: fadeUp 0.8s ease 1.2s forwards;
}

.scroll-hint span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: pulse 2s ease-in-out infinite;
}

.scroll-hint::after {
  content: '';
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  width: 100vw;
  height: 1px;
  background: var(--border);
  transform: translateX(-50%);
}

/* ---- MISSION / THESIS ---- */
#mission { border-top: 1px solid var(--border); }

.mission-content { max-width: 700px; }

.mission-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
}

.mission-text {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 300;
  line-height: 1.5;
  color: var(--text-primary);
}

.mission-text strong { font-weight: 700; color: #ffffff; }

.mission-closer {
  margin-top: 2rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

/* ---- PRINCIPLES ---- */
#principles { border-top: 1px solid var(--border); }

.principles-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3rem;
}

.principle {
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem 2rem;
  align-items: baseline;
}

.principle:first-of-type { border-top: 1px solid var(--border); }

.principle-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  padding-top: 0.15rem;
}

.principle-headline {
  font-weight: 700;
  font-size: 1.4rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.principle-body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  font-weight: 300;
}

#approach .principle-number { color: #ffffff; }
#approach .principle-headline { color: var(--accent); }

/* ---- TEAM ---- */
#team { border-top: 1px solid var(--border); padding-top: 2rem; min-height: 0; }

.team-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3rem;
}

.founder-card {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.founder-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--bg-subtle);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.founder-avatar::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid var(--accent-dim);
}

.founder-avatar svg { width: 40px; height: 40px; opacity: 0.3; }

.founder-name {
  font-weight: 700;
  font-size: 1.3rem;
  color: #ffffff;
  margin-bottom: 0.3rem;
}

.founder-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
}

.founder-credential {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-weight: 300;
}

/* ---- CTA ---- */
#cta {
  border-top: 1px solid var(--border);
  text-align: center;
  min-height: 0;
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.cta-headline {
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  color: #ffffff;
}

.cta-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  font-weight: 300;
}

.cta-button {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  padding: 1rem 3rem;
  border: none;
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
}

.cta-button:hover {
  box-shadow: 0 0 30px var(--accent-glow), 0 0 60px var(--accent-dim);
  transform: translateY(-2px);
}

/* ---- MODAL ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3rem;
  width: 90%;
  max-width: 460px;
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal { transform: translateY(0) scale(1); }

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.3s;
  font-family: var(--font-mono);
}

.modal-close:hover { color: var(--accent); }

.modal-title {
  font-weight: 700;
  font-size: 1.4rem;
  color: #ffffff;
  margin-bottom: 0.4rem;
}

.modal-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 300;
}

.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.3s;
  -webkit-appearance: none;
  appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23888' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-dim);
}

.form-group input::placeholder { color: var(--text-dim); }
.form-group select option { background: var(--bg); color: var(--text-primary); }

.form-submit {
  width: 100%;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  padding: 0.9rem;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.3s;
}

.form-submit:hover { box-shadow: 0 0 20px var(--accent-glow); }
.form-submit:disabled { opacity: 0.4; cursor: not-allowed; }

.form-success { text-align: center; padding: 1rem 0; }
.form-success .checkmark { font-size: 2.5rem; margin-bottom: 1rem; color: var(--accent); }
.form-success p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.5; }
.form-success p strong { color: #ffffff; font-weight: 700; }

/* ---- ANIMATIONS ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---- INDEX MOBILE ---- */
@media (max-width: 768px) {
  section { padding: 7rem 1.5rem 3rem; }
  main > section:first-of-type { padding-top: 8rem; }
  .principle { grid-template-columns: 1fr; gap: 0.5rem; }
  .principle-number { display: none; }
  .founder-card { flex-direction: column; text-align: center; }
}