/* ==========================================================================
   Bluewater Command — Stylesheet
   ========================================================================== */

:root {
  /* Backgrounds */
  --bg-base:      #081F3A;   /* primary section background */
  --bg-alt:       #06172B;   /* alternating darker section background */
  --bg-card:      #0B2948;   /* cards, panels, inputs */
  --bg-card-2:    #0A2A42;   /* chart/graphic surfaces */

  /* Borders */
  --border-card:  #17395C;
  --border-soft:  rgba(147, 171, 190, 0.25);

  /* Accents */
  --cyan:         #00D4E8;
  --cyan-dim:     #0391A8;
  --purple:       #6F50DD;

  /* Text */
  --text-head:    #F4FBFF;
  --text-body:    #91A7BD;
  --text-muted:   #5C7286;

  /* Type */
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  /* Layout */
  --wrap-width:   1200px;
  --section-pad:  clamp(4rem, 8vw, 7rem);
  --radius-lg:    14px;
  --radius-md:    10px;
  --radius-sm:    6px;
}

/* ==========================================================================
   Reset
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-body);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; margin: 0; padding: 0; }

h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); color: var(--text-head); font-weight: 700; }

p { margin: 0; }

button, input, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--cyan);
  color: #04202b;
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  font-weight: 600;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ==========================================================================
   Layout helpers
   ========================================================================== */

.wrap {
  max-width: var(--wrap-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding-block: var(--section-pad);
  background: var(--bg-base);
}

.section-alt {
  background: var(--bg-alt);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

/* ==========================================================================
   Typography
   ========================================================================== */

.eyebrow {
  font-family: var(--font-mono);
  color: var(--cyan);
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(2.75rem, 6.5vw, 4.75rem);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin-bottom: 1.75rem;
}

.section-title {
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  max-width: 20ch;
  margin-bottom: 1.5rem;
}

.cta-title {
  max-width: 18ch;
}

.lead {
  font-size: 1.05rem;
  color: var(--text-body);
  max-width: 46ch;
  margin-bottom: 1rem;
}

.lead-wide {
  max-width: 64ch;
}

.section > .wrap > .lead:last-of-type,
.section > .wrap > .lead-wide {
  margin-bottom: 2.5rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.8rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}

.btn-cyan {
  background: var(--cyan);
  color: #04202b;
}

.btn-cyan:hover {
  background: #33e0f0;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 232, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--text-head);
  border-color: var(--border-soft);
}

.btn-outline:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.btn-small {
  padding: 0.6rem 1.25rem;
  font-size: 0.85rem;
}

.btn-full {
  width: 100%;
}

/* ==========================================================================
   Header / Nav
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 31, 58, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
  background: #ffffff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
}

.brand-mark {
  width: 40px;
  height: auto;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--bg-base);
  letter-spacing: 0.01em;
  text-transform: uppercase;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  margin-left: auto;
}

.main-nav a {
  font-size: 0.95rem;
  color: var(--text-body);
  transition: color 0.2s ease;
}

.main-nav a:hover {
  color: var(--text-head);
}

.nav-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--text-head);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0;
  padding: 0.5rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border-soft);
}

.mobile-nav a {
  padding: 0.85rem 0;
  font-size: 1rem;
  color: var(--text-body);
  border-bottom: 1px solid var(--border-soft);
}

.mobile-nav a:last-child {
  border-bottom: none;
  margin-top: 0.75rem;
  text-align: center;
}

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

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding-top: clamp(3rem, 7vw, 5.5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

/* ==========================================================================
   Panel card (hero dashboard + trip record)
   ========================================================================== */

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.5);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-head);
}

.panel-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(0, 212, 232, 0.6);
  animation: pulse 2.2s infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(0, 212, 232, 0.55); }
  70%  { box-shadow: 0 0 0 8px rgba(0, 212, 232, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 212, 232, 0); }
}

.panel-chart {
  border-radius: var(--radius-md);
  overflow: hidden;
  line-height: 0;
  margin-bottom: 1rem;
  border: 1px solid var(--border-card);
}

.panel-chart svg {
  width: 100%;
  height: auto;
  display: block;
}

.panel-coords {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.85rem;
}

.panel-stats {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border-card);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.stat-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-head);
}

.trip-record .panel-header {
  margin-bottom: 1rem;
}

.trip-detail {
  font-size: 0.85rem;
  color: var(--text-body);
  letter-spacing: 0.01em;
}

/* ==========================================================================
   Source bar (Problem section)
   ========================================================================== */

.source-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
  background: var(--bg-card);
}

.source-list {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-body);
}

.source-list span {
  color: var(--cyan);
  margin: 0 0.5em;
}

.source-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  color: var(--text-head);
  text-transform: uppercase;
  white-space: nowrap;
}

/* ==========================================================================
   Feature grid (Core Platform)
   ========================================================================== */

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.feature-card:hover {
  border-color: var(--cyan-dim);
  transform: translateY(-3px);
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-body);
}

.feature-card-highlight {
  border-color: var(--purple);
  box-shadow: 0 0 0 1px var(--purple), 0 20px 40px -24px rgba(111, 80, 221, 0.5);
}

.feature-card-highlight:hover {
  border-color: var(--purple);
  box-shadow: 0 0 0 1px var(--purple), 0 20px 40px -20px rgba(111, 80, 221, 0.6);
}

/* ==========================================================================
   Vessel bar
   ========================================================================== */

.vessel-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
}

.anchor-icon {
  flex-shrink: 0;
}

.vessel-list {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  color: var(--text-body);
  text-transform: uppercase;
}

.vessel-list span {
  color: var(--cyan);
  margin: 0 0.5em;
}

/* ==========================================================================
   Signup form
   ========================================================================== */

.signup-form {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  max-width: 440px;
  margin-left: auto;
}

.field {
  margin-bottom: 1.1rem;
}

.field label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.field input,
.field select {
  width: 100%;
  background: var(--bg-base);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.9rem;
  color: var(--text-head);
}

.field input::placeholder {
  color: var(--text-muted);
}

.field input:focus,
.field select:focus {
  border-color: var(--cyan);
}

.field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2391A7BD' stroke-width='1.5' fill='none' fill-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.2rem;
}

.form-fineprint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 1rem;
  line-height: 1.5;
}

.form-success {
  display: none;
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(0, 212, 232, 0.1);
  border: 1px solid var(--cyan-dim);
  color: var(--cyan);
  font-size: 0.88rem;
}

.form-success.is-visible {
  display: block;
}

.signup-form.is-submitted .field,
.signup-form.is-submitted button {
  display: none;
}

.signup-form.is-submitted .form-fineprint {
  display: none;
}

/* ==========================================================================
   Ecosystem grid
   ========================================================================== */

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-top: 0.5rem;
}

.ecosystem-col {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.ecosystem-item {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-head);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ecosystem-item-cyan {
  color: var(--cyan);
}

.tag-planned,
.tag-dev {
  font-family: var(--font-body);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.tag-dev {
  color: var(--cyan-dim);
}

.ecosystem-col-highlight {
  border-left: 1px solid var(--border-card);
  padding-left: 2rem;
}

/* ==========================================================================
   Who it's for
   ========================================================================== */

.who-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.who-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.who-card:hover {
  border-color: var(--cyan-dim);
  transform: translateY(-3px);
}

.who-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
}

.who-card p {
  font-size: 0.92rem;
  color: var(--text-body);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border-card);
  padding-block: 2.5rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .status-dot {
    animation: none;
  }
  .btn, .feature-card, .who-card {
    transition: none;
  }
}

/* ==========================================================================
   Responsive — Tablet
   ========================================================================== */

@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-card-highlight {
    grid-column: span 2;
  }
  .who-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .main-nav,
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }

  .hero-grid,
  .two-col {
    grid-template-columns: 1fr;
  }
  .hero-panel {
    order: -1;
  }

  .ecosystem-grid {
    grid-template-columns: 1fr 1fr;
    row-gap: 2rem;
  }
  .ecosystem-col-highlight {
    grid-column: span 2;
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--border-card);
    padding-top: 1.5rem;
  }

  .signup-form {
    margin-left: 0;
    max-width: 100%;
  }
}

/* ==========================================================================
   Responsive — Mobile
   ========================================================================== */

@media (max-width: 640px) {
  :root {
    --section-pad: 3.5rem;
  }

  .btn-row {
    flex-direction: column;
    align-items: stretch;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
  .feature-card-highlight {
    grid-column: span 1;
  }

  .source-bar,
  .vessel-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel-stats {
    flex-wrap: wrap;
  }

  .ecosystem-grid {
    grid-template-columns: 1fr;
  }
  .ecosystem-col-highlight {
    grid-column: span 1;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}