/* ------------------------------------------------------------------
   win2future - industrial water-infrastructure engineering site
   Design: Archivo (display) + IBM Plex Mono (data/labels)
   Palette: cool paper / steel hairlines / ink navy / water-blue accent
------------------------------------------------------------------- */

/* Fonts (self-hosted) */
@font-face {
  font-family: "Archivo";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../fonts/archivo-400.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/plexmono-400.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/plexmono-500.woff2") format("woff2");
}

/* Tokens */
:root {
  --bg: #f3f6f7;
  --bg-2: #e9eff1;
  --surface: #ffffff;
  --ink: #0d1b27;
  --ink-2: #44576a;
  --ink-3: #4e6377;
  --line: #c7d4db;
  --line-strong: #aebfc9;
  --accent: #0f7a92;
  --accent-soft: #e3f0f4;
  --band: #0e1b27;
  --band-2: #132434;
  --footer: #0a1319;
  --on-band: #e9f0f4;
  --on-band-2: #9db2c2;
  --on-band-line: rgba(255, 255, 255, 0.16);
  --danger: #ff9b80;
  --radius: 6px;
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c141b;
    --bg-2: #101b24;
    --surface: #131f29;
    --ink: #e7eef2;
    --ink-2: #a9bac7;
    --ink-3: #93a6b4;
    --line: #23323d;
    --line-strong: #30424f;
    --accent: #4fb4ce;
    --accent-soft: rgba(79, 180, 206, 0.12);
    --band: #0a1117;
    --band-2: #0e1922;
    --footer: #080f14;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-2);
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

h1, h2, h3 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
}

p {
  margin: 0;
}

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

::selection {
  background: var(--accent);
  color: var(--bg);
}

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

.container {
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--bg);
  padding: 0.75rem 1.25rem;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 650;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.25s cubic-bezier(0.16, 1, 0.3, 1),
    color 0.25s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.25s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--accent);
  color: var(--bg);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-block {
  width: 100%;
}

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: #fff;
  padding: 3px;
  border: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-left: auto;
}

.nav a {
  color: var(--ink-2);
  font-size: 0.95rem;
  font-weight: 550;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--ink);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-cta {
  padding: 0.65rem 1.15rem;
  font-size: 0.9rem;
}

.menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 42px;
  height: 42px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
}

.menu-btn span {
  display: block;
  height: 2px;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Hero */
.hero {
  padding-top: clamp(3rem, 6vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-3);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: clamp(2.5rem, 4.8vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 700;
  max-width: 14ch;
}

.accent-word {
  color: var(--accent);
  font-weight: 700;
}

.hero-sub {
  margin-top: 1.5rem;
  max-width: 52ch;
  font-size: 1.0625rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.hero-media {
  margin: 0;
}

.hero-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

/* Capabilities strip */
.capabilities {
  display: flex;
  flex-wrap: wrap;
  margin-top: clamp(3.5rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.capabilities li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-2);
  padding: 1.25rem 1.75rem 1.25rem 0;
}

.capabilities li + li {
  padding-left: 1.75rem;
  border-left: 1px solid var(--line);
}

/* Sections */
.section {
  padding: clamp(4.5rem, 8vw, 7rem) 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 62ch;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-title {
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.section-sub {
  margin-top: 1rem;
  max-width: 56ch;
}

/* Services */
.service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 3rem;
}

.service-card {
  border-top: 1px solid var(--line);
  padding: 2rem 0;
  transition: background-color 0.25s ease;
}

.service-card:nth-child(odd) {
  padding-right: 1.5rem;
}

.service-card:nth-child(even) {
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
}

.service-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition: color 0.2s ease;
}

.service-card:hover .service-title {
  color: var(--accent);
}

.service-body {
  margin-top: 0.6rem;
  max-width: 46ch;
}

/* Projects */
.section-projects .section-head {
  max-width: 100%;
}

.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-areas:
    "aerial aerial supply"
    "site tank supply";
  gap: 1.5rem;
}

.project {
  margin: 0;
  display: flex;
  flex-direction: column;
}

.project-aerial { grid-area: aerial; }
.project-supply { grid-area: supply; }
.project-site { grid-area: site; }
.project-tank { grid-area: tank; }

.project-frame {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-2);
}

.project-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.project:hover .project-frame img {
  transform: scale(1.04);
}

.project-aerial .project-frame { aspect-ratio: 3 / 2; }
.project-supply .project-frame { aspect-ratio: 3 / 4; }
.project-site .project-frame { aspect-ratio: 1 / 1; }
.project-tank .project-frame { aspect-ratio: 3 / 4; }

.project figcaption {
  margin-top: 0.75rem;
}

.project-name {
  display: block;
  color: var(--ink);
  font-weight: 650;
  font-size: 1.02rem;
}

.project-note {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-3);
  margin-top: 0.3rem;
}

/* Process */
.process-item {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 1.5rem;
  padding: 1.9rem 0;
  border-top: 1px solid var(--line);
}

.process-num {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  padding-top: 0.3rem;
}

.process-title {
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  letter-spacing: -0.015em;
}

.process-body {
  margin-top: 0.5rem;
  max-width: 56ch;
}

/* Dark band */
.band {
  background: var(--band);
  color: var(--on-band-2);
  padding: clamp(4.5rem, 8vw, 7rem) 0;
}

.band + .band {
  background: var(--band-2);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.band-title {
  color: var(--on-band);
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.band-body {
  margin-top: 1.1rem;
  max-width: 56ch;
  line-height: 1.65;
}

.band-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: center;
}

.band-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 2.5rem;
  margin-top: 2.5rem;
}

.band-list li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--on-band);
  padding: 1rem 0;
  border-top: 1px solid var(--on-band-line);
}

.band-media {
  margin: 0;
}

.band-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--on-band-line);
}

.band-media figcaption {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--on-band-2);
  margin-top: 0.7rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: start;
}

.contact-channel {
  margin-top: 2.75rem;
  border-top: 1px solid var(--on-band-line);
  padding-top: 1.75rem;
}

.contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--on-band-2);
  margin-bottom: 0.6rem;
}

.contact-email {
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  font-weight: 650;
  color: var(--on-band);
  text-decoration: underline;
  text-decoration-color: var(--on-band-line);
  text-underline-offset: 7px;
  transition: color 0.2s ease;
}

.contact-email:hover {
  color: var(--accent);
}

.contact-address {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--on-band);
  text-decoration: underline;
  text-decoration-color: var(--on-band-line);
  text-underline-offset: 5px;
  transition: color 0.2s ease;
}

.contact-address:hover {
  color: var(--accent);
}

.contact-hint {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--on-band-2);
  margin-top: 0.6rem;
}

.contact-form {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--on-band-line);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2.25rem);
}

.field {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.field label {
  color: var(--on-band);
  font-size: 0.92rem;
  font-weight: 600;
}

.field input,
.field textarea {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--on-band);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--on-band-line);
  border-radius: var(--radius);
  padding: 0.8rem 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--on-band-2);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 180, 206, 0.22);
}

.field textarea {
  resize: vertical;
  min-height: 130px;
}

.field-hint {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--on-band-2);
}

.field-error {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--danger);
}

.field.invalid input,
.field.invalid textarea {
  border-color: var(--danger);
}

.field.invalid .field-error {
  display: block;
}

.form-note {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--on-band-2);
  margin-top: 1rem;
  text-align: center;
}

/* Footer */
.site-footer {
  background: var(--footer);
  color: var(--on-band-2);
  padding-top: 3.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 2.75rem;
}

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: #fff;
  padding: 4px;
}

.footer-brand p {
  margin-top: 1.1rem;
  max-width: 30ch;
  font-size: 0.95rem;
}

.footer-nav {
  display: grid;
  align-content: start;
  gap: 0.65rem;
}

.footer-nav a {
  color: var(--on-band-2);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--on-band);
}

.footer-contact {
  display: grid;
  align-content: start;
  gap: 0.65rem;
}

.footer-contact a {
  color: var(--on-band);
  font-weight: 600;
  text-decoration-color: var(--on-band-line);
}

.footer-contact span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.footer-bottom {
  border-top: 1px solid var(--on-band-line);
  padding: 1.35rem 0;
}

.footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--on-band-2);
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--d, 0ms);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 1023px) {
  .nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    z-index: 49;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: 1rem clamp(1.25rem, 4vw, 2.5rem) 1.5rem;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .site-header.nav-open .nav {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .nav a {
    padding: 0.9rem 0;
    border-top: 1px solid var(--line);
    font-size: 1.05rem;
  }

  .nav-cta {
    display: none;
  }

  .menu-btn {
    display: flex;
    margin-left: auto;
  }

  .site-header.nav-open .menu-btn span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .site-header.nav-open .menu-btn span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .band-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 820px) {
  .service-grid {
    grid-template-columns: 1fr;
  }

  .service-card:nth-child(even) {
    padding-left: 0;
    border-left: none;
  }

  .service-card:nth-child(odd) {
    padding-right: 0;
  }

  .band-list {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 700px) {
  .capabilities {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 1.5rem;
    row-gap: 0.25rem;
    padding: 0.5rem 0;
  }

  .capabilities li,
  .capabilities li + li {
    padding: 0.75rem 0;
    border-left: none;
  }

  .project-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "aerial"
      "supply"
      "site"
      "tank";
    gap: 2rem;
  }

  .project-frame {
    aspect-ratio: 4 / 3 !important;
  }

  .project-supply .project-frame,
  .project-tank .project-frame {
    aspect-ratio: 4 / 3;
  }

  .process-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1.5rem 0;
  }

  .process-num {
    padding-top: 0;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}