/* =============================================
   HYDRODOMUS — Light / Sharp Design System
   ============================================= */

/* --- Custom Properties --- */
:root {
  --white:    #FFFFFF;
  --bg:       #F5F6F8;
  --bg-alt:   #EEF0F3;
  --border:   #DFE2E7;
  --border-2: #C7CCD3;

  --navy:     #0B1220;
  --navy-2:   #16233A;
  --navy-3:   #24344F;

  --blue:       #144EE0;
  --blue-mid:   #0F3AAE;
  --blue-light: #EBF1FF;
  --blue-dim:   rgba(20, 78, 224, 0.09);

  --green:       #059669;
  --green-light: #ECFDF5;

  --red:       #DC2626;
  --red-light: #FEF2F2;

  --text:   #0B1220;
  --text-2: #33394A;
  --text-3: #63697A;
  --text-4: #9198A6;

  --shadow-xs: 0 1px 0 rgba(11,18,32,0.06);
  --shadow-sm: 0 1px 2px rgba(11,18,32,0.10);
  --shadow:    0 2px 10px rgba(11,18,32,0.10);
  --shadow-lg: 0 10px 28px rgba(11,18,32,0.14);

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;

  --section-py: clamp(2.5rem, 3.5vw, 4rem);
  --radius:    6px;
  --radius-sm: 3px;
  --radius-lg: 16px;
}

/* Subtle grain for large flat surfaces (navy sections, hero scrim) —
   inline SVG turbulence, no extra asset request. */
.bg-grain {
  position: relative;
}
.bg-grain::after,
.section-navy::after,
.learn-hero::after,
.pitch-card::after {
  content: '';
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  color: var(--navy);
  line-height: 1.15;
}
.display-title {
  font-size: clamp(2.8rem, 5.5vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.section-title {
  font-size: clamp(1.75rem, 3.2vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.875rem;
}
.section-tag::before {
  content: '';
  display: inline-block;
  width: 16px; height: 2px;
  background: var(--blue);
  border-radius: 1px;
}
.section-sub {
  font-size: 1.05rem;
  color: var(--text-3);
  max-width: 560px;
  line-height: 1.75;
  margin-top: 1rem;
}
.blue-text { color: var(--blue); }

/* --- Container --- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* =========================================
   NAVIGATION
   ========================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: background 0.2s, box-shadow 0.2s;
}
.nav.scrolled {
  background: rgba(255,255,255,0.99);
  box-shadow: var(--shadow-sm);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.nav-logo img { height: 30px; }
.nav-logo-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.01em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.nav-links a {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-3);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--navy); background: var(--bg); }
.nav-links a.active { color: var(--blue); background: var(--blue-dim); }
.nav-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.lang-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-3);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: all 0.15s;
}
.lang-btn:hover { border-color: var(--blue); color: var(--blue); }
.lang-btn.active { border-color: var(--blue); color: var(--blue); background: var(--blue-dim); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 4.5px;
  background: none;
  border: none;
  padding: 6px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--navy); border-radius: 1px; transition: all 0.3s;
}
.mobile-menu {
  display: none; position: fixed; inset: 0; z-index: 199;
  background: var(--white); flex-direction: column;
  align-items: center; justify-content: center; gap: 0.5rem;
  padding: 2rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--font-display);
  font-size: 1.8rem; font-weight: 700;
  color: var(--navy); padding: 0.6rem 1.5rem;
  border-radius: var(--radius); width: 100%; text-align: center;
  transition: background 0.15s;
}
.mobile-menu a:hover { background: var(--bg); }
.mobile-close {
  position: absolute; top: 1.25rem; right: 1.75rem;
  background: none; border: none;
  color: var(--text-3); font-size: 1.5rem; line-height: 1;
}
.mobile-lang { display: flex; gap: 0.5rem; margin-top: 1.5rem; }

/* =========================================
   BUTTONS
   ========================================= */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 600; font-size: 0.9rem;
  letter-spacing: 0.01em;
  cursor: pointer; border: none;
  transition: all 0.15s ease; white-space: nowrap;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: var(--shadow-xs);
}
.btn-primary:hover {
  background: var(--blue-mid);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  background: var(--white); color: var(--navy);
  border: 1.5px solid var(--border-2);
}
.btn-outline:hover {
  border-color: var(--navy); background: var(--bg);
  transform: translateY(-1px);
}
.btn-white {
  background: var(--white); color: var(--navy);
  box-shadow: var(--shadow-sm);
}
.btn-white:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-sm { padding: 0.55rem 1.2rem; font-size: 0.82rem; }

/* =========================================
   CARD
   ========================================= */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
  transition: box-shadow 0.2s, border-color 0.2s;
}
.card:hover {
  box-shadow: var(--shadow);
  border-color: var(--border-2);
}
.card-blue { border-top: 3px solid var(--blue); }

/* =========================================
   SECTIONS
   ========================================= */
section { padding: var(--section-py) 0; }
.section-white { background: var(--white); }
.section-gray  { background: var(--bg); }
.section-navy  {
  position: relative;
  overflow: hidden;
  background: var(--navy);
  color: #fff;
}
.section-navy h2, .section-navy h3 { color: #fff; }
.section-navy .section-tag { color: rgba(255,255,255,0.55); }
.section-navy .section-tag::before { background: rgba(255,255,255,0.45); }
.section-navy .section-sub { color: rgba(255,255,255,0.6); }

.section-head { margin-bottom: 2rem; text-align: center; }
.section-head .section-sub { margin-left: auto; margin-right: auto; }
hr.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* =========================================
   PLACEHOLDER PAGE (home / how-it-works / waitlist)
   ========================================= */
.placeholder-hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 0 5rem;
  background: var(--white);
  position: relative;
  overflow: hidden;
}
.placeholder-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(11,18,32,0.06) 1px, transparent 0);
  background-size: 26px 26px;
  pointer-events: none;
}
.placeholder-inner { position: relative; z-index: 1; }
.placeholder-eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--blue-light);
  border: 1px solid rgba(20,78,224,0.18);
  padding: 0.35rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.76rem; font-weight: 700;
  color: var(--blue); letter-spacing: 0.08em; text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.placeholder-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700; letter-spacing: -0.03em;
  color: var(--navy); margin-bottom: 1rem;
}
.placeholder-sub {
  font-size: 1.05rem; color: var(--text-3);
  max-width: 480px; margin: 0 auto;
  line-height: 1.7;
}
/* =========================================
   HOME — locked single-screen page (no scroll)
   ========================================= */
body.canvas-page {
  height: 100vh;
  overflow: hidden;
  background: linear-gradient(180deg, #E3E3E4 0%, #ECECED 55%, #F7F7F7 100%);
}
/* Nav blends into the page instead of sitting as a separate bar —
   it sits above the full-screen particle field, background transparent
   so particles drift behind it too. */
body.canvas-page .nav {
  position: relative;
  z-index: 2;
  background: transparent;
  border-bottom: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: none;
}
body.canvas-page .nav.scrolled { background: transparent; box-shadow: none; }

.chem-stage {
  position: fixed;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}
/* faint technical dot-grid behind the particle field, same pattern used
   on the placeholder page headers — the canvas itself is transparent
   (clearRect only), so this shows through everywhere the particles don't. */
.chem-stage-home::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(11,18,32,0.08) 1px, transparent 0);
  background-size: 28px 28px;
  pointer-events: none;
}
#chem-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}
.chem-hero-text {
  position: absolute;
  left: 0; right: 0; top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  text-align: center;
  pointer-events: none;
  padding: 0 2rem;
}
/* Keeps the headline legible no matter what the particle animation is
   doing behind it (the compression stage gathers a dense cluster right
   at screen center) — a soft plate the text always reads against,
   without ever fully hiding the animation. */
.chem-hero-scrim {
  position: absolute;
  inset: -0.5rem -1.5rem;
  z-index: -1;
  background: radial-gradient(ellipse at center, rgba(245,246,248,0.4) 0%, rgba(245,246,248,0.18) 55%, transparent 80%);
}
.chem-headline {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 3rem);
  font-weight: 700; color: var(--navy);
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.chem-subline {
  margin-top: 0.75rem;
  font-family: var(--font-body);
  font-size: clamp(0.95rem, 1.6vw, 1.15rem);
  font-weight: 500;
  color: var(--text-3);
}
.chem-caption-wrap {
  position: absolute;
  left: 0; right: 0; bottom: 2.75rem;
  z-index: 2;
  text-align: center;
  pointer-events: none;
}
.chem-caption-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  font-weight: 700; color: var(--navy);
  letter-spacing: -0.02em;
  transition: opacity 0.2s ease;
}
.chem-progress-track {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: rgba(11,18,32,0.08);
  z-index: 2;
}
.chem-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--blue);
}

/* =========================================
   FOOTER
   ========================================= */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 3.5rem; margin-bottom: 2.5rem;
}
.footer-brand-logo {
  display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.875rem;
}
.footer-brand-logo img { height: 28px; }
.footer-brand-logo span { font-family: var(--font-display); font-size: 1.05rem; font-weight: 700; color: var(--navy); }
.footer-brand p { font-size: 0.875rem; color: var(--text-3); line-height: 1.7; max-width: 280px; }
.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.76rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 1.125rem;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col a { font-size: 0.875rem; color: var(--text-3); transition: color 0.15s; }
.footer-col a:hover { color: var(--navy); }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 1.5rem;
  display: flex; justify-content: space-between; align-items: center;
}
.footer-bottom p { font-size: 0.8rem; color: var(--text-4); }
.footer-badge { display: flex; align-items: center; gap: 0.6rem; }
.footer-badge span { font-size: 0.72rem; color: var(--text-4); }
.footer-badge img { height: 30px; width: auto; display: block; }

/* =========================================
   PAGE HEADER
   ========================================= */
.page-header {
  padding: calc(var(--section-py) + 3.5rem) 0 var(--section-py);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.page-header-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700; letter-spacing: -0.035em;
  color: var(--navy); margin-bottom: 1.25rem;
}
.page-header-sub { font-size: 1.05rem; color: var(--text-3); max-width: 540px; margin: 0 auto; line-height: 1.75; }

/* =========================================
   CONTACT PAGE
   ========================================= */
.contact-grid {
  display: grid; grid-template-columns: 1.3fr 1fr;
  gap: 5rem; align-items: flex-start;
}
.form-group { margin-bottom: 1.375rem; }
.form-label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--navy-2); margin-bottom: 0.45rem; }
.form-input, .form-textarea, .form-select {
  width: 100%;
  background: var(--white); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 0.875rem 1.1rem;
  color: var(--text); font-family: var(--font-body);
  font-size: 0.925rem; transition: all 0.15s; outline: none;
}
.form-input:hover, .form-textarea:hover, .form-select:hover { border-color: var(--border-2); }
.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(20,78,224,0.12);
}
.form-textarea { min-height: 140px; resize: vertical; }
.form-select {
  appearance: none; -webkit-appearance: none;
  padding-right: 2.75rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2363697A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
}
.form-select option { background: var(--white); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.contact-info-section h3 { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; color: var(--navy); margin-bottom: 1.25rem; }
.contact-info-item {
  display: flex; gap: 1rem; align-items: center;
  padding: 1rem 1.25rem;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-xs);
  margin-bottom: 0.75rem;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
}
.contact-info-item:hover {
  box-shadow: var(--shadow); border-color: var(--border-2); transform: translateY(-1px);
}
.contact-info-icon {
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 999px;
  background: var(--blue-dim); color: var(--blue);
}
.contact-info-label { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); margin-bottom: 0.15rem; }
.contact-info-value { font-size: 0.9rem; color: var(--navy); font-weight: 500; }
.hiring-box {
  padding: 1.75rem; background: var(--blue-dim);
  border: 1px solid rgba(20,78,224,0.18);
  border-radius: var(--radius); margin-top: 1.75rem;
}
.hiring-box-tag { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--blue); margin-bottom: 0.75rem; }
.hiring-box p { font-size: 0.875rem; color: var(--text-3); line-height: 1.7; }

/* =========================================
   WAITLIST — one-question-at-a-time flow
   ========================================= */
.qflow-section {
  min-height: calc(100vh - 64px);
  display: flex; align-items: center; justify-content: center;
  background: var(--white);
  padding: 7rem 2rem 4rem;
}
.qflow-wrap { width: 100%; max-width: 560px; }
.qflow-progress {
  display: flex; gap: 0.4rem; margin-bottom: 2.25rem;
}
.qflow-dot {
  height: 4px; flex: 1; border-radius: 4px;
  background: var(--border); transition: background 0.2s, box-shadow 0.2s;
}
.qflow-dot.done { background: var(--blue); }
.qflow-dot.current { background: var(--blue); box-shadow: 0 0 0 3px rgba(20,78,224,0.18); }
.qflow-card {
  animation: qflowIn 0.35s ease;
}
@keyframes qflowIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
.qflow-eyebrow {
  font-size: 0.76rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--blue); margin-bottom: 0.875rem;
}
.qflow-question {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 700; letter-spacing: -0.025em;
  color: var(--navy); margin-bottom: 1.75rem; line-height: 1.2;
}
.qflow-input {
  width: 100%;
  background: var(--white); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.25rem;
  color: var(--text); font-family: var(--font-body);
  font-size: 1.1rem; transition: all 0.15s; outline: none;
}
.qflow-input:hover { border-color: var(--border-2); }
.qflow-input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(20,78,224,0.12); }
.qflow-error { font-size: 0.82rem; color: var(--red); margin-top: 0.6rem; min-height: 1.2em; }
.qflow-choices { display: flex; flex-direction: column; gap: 0.75rem; }
.qflow-choice-btn {
  display: block; width: 100%; text-align: left;
  padding: 1.05rem 1.25rem;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  background: var(--white); color: var(--navy);
  font-family: var(--font-body); font-size: 0.975rem; font-weight: 500;
  cursor: pointer; transition: border-color 0.15s, background 0.15s, transform 0.15s, box-shadow 0.15s;
}
.qflow-choice-btn:hover { border-color: var(--blue); background: var(--blue-dim); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.qflow-choice-btn:active { transform: translateY(0) scale(0.99); }
.qflow-choice-btn.selected { border-color: var(--blue); background: var(--blue-dim); color: var(--blue); font-weight: 600; box-shadow: var(--shadow-sm); }
.qflow-actions {
  display: flex; align-items: center; gap: 1.25rem; margin-top: 1.5rem;
}
.qflow-back {
  font-size: 0.85rem; color: var(--text-3); cursor: pointer;
  background: none; border: none; font-family: inherit;
}
.qflow-back:hover { color: var(--navy); }
.qflow-hint { font-size: 0.78rem; color: var(--text-4); }
.qflow-done { text-align: center; }
.qflow-done-title {
  font-family: var(--font-display); font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 700; color: var(--navy); margin-bottom: 0.875rem;
}
.qflow-done-sub { font-size: 1rem; color: var(--text-3); line-height: 1.7; }

/* =========================================
   SCROLL REVEAL
   ========================================= */
.reveal, .reveal-l, .reveal-r {
  opacity: 0; transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal   { transform: translateY(16px); }
.reveal-l { transform: translateX(-16px); }
.reveal-r { transform: translateX(16px); }
.revealed { opacity: 1 !important; transform: translate(0,0) !important; }
.d1 { transition-delay: 0.10s; }
.d2 { transition-delay: 0.18s; }
.d3 { transition-delay: 0.26s; }
.d4 { transition-delay: 0.34s; }
.d5 { transition-delay: 0.42s; }

/* =========================================
   RESPONSIVE
   ========================================= */
/* Learn article pages: minimal nav (logo + lang toggle only, no links to
   collapse), so keep the lang buttons visible instead of hiding them
   behind a hamburger that doesn't exist there. */
.nav-minimal .nav-right { display: flex; }

@media (max-width: 768px) {
  .nav-links, .nav-right { display: none; }
  .hamburger { display: flex; }
  .nav-minimal .nav-right { display: flex; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
}