/* =====================================================
   LOWER TECHNOLOGY — Site Styles
   Colors derived from logo SVG
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

/* ===== Design Tokens ===== */
:root {
  --bg-dark:    #1A1917;
  --bg-mid:     #242220;
  --bg-card:    #1F1D1C;
  --bg-light:   #F5F5F5;
  --text-cream: #F1EFE8;
  --text-gray:  #A8A7A1;
  --text-mid:   #8A8784;
  --text-dark:  #333230;
  --border:     #333230;
  --border-lt:  #E0DEDA;

  --teal:       #9FE1CB;
  --teal-dark:  #0F6E56;
  --blue:       #185FA5;
  --blue-mid:   #2A68A0;
  --blue-light: #5B9BD5;

  --font: 'Space Mono', 'IBM Plex Mono', 'Courier New', monospace;
  --max-w: 1100px;
  --nav-h: 60px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { font-size: 16px; scroll-behavior: smooth; }
body  {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text-cream);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img   { max-width: 100%; display: block; }
a     { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Grid Texture ===== */
.grid-bg {
  background-color: var(--bg-dark);
  background-image:
    linear-gradient(rgba(159,225,203,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159,225,203,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* ===== Layout ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; }
.section   { padding: 80px 0; }

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 28px;
  height: 100%;
  display: flex; justify-content: space-between; align-items: center;
}
.nav__logo {
  font-size: 12px; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-cream);
}
.nav__logo .accent { color: var(--teal); }
.nav__links { list-style: none; display: flex; gap: 28px; }
.nav__links a {
  font-size: 10px; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--text-gray);
  transition: color 0.15s;
}
.nav__links a:hover, .nav__links a.active { color: var(--teal); text-decoration: none; }

/* ===== Hamburger ===== */
.nav__hamburger {
  display: none; flex-direction: column; justify-content: space-between;
  width: 22px; height: 15px; cursor: pointer; background: none; border: none; padding: 0;
}
.nav__hamburger span {
  display: block; height: 2px; width: 100%; background: var(--text-cream);
  transition: all 0.2s;
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ===== Mobile Menu ===== */
.nav__mobile {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0;
  background: var(--bg-dark); border-bottom: 1px solid var(--border);
  padding: 16px 28px; z-index: 99;
}
.nav__mobile.open { display: block; }
.nav__mobile ul { list-style: none; display: flex; flex-direction: column; gap: 0; }
.nav__mobile ul li a {
  display: block; padding: 14px 0;
  font-size: 11px; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--text-gray);
  border-bottom: 1px solid var(--border);
  transition: color 0.15s;
}
.nav__mobile ul li:last-child a { border-bottom: none; }
.nav__mobile ul li a:hover, .nav__mobile ul li a.active { color: var(--teal); text-decoration: none; }

/* ===== Hero (home) ===== */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 80px 28px;
}
.hero__logo   { width: 100%; max-width: 500px; margin: 0 auto 40px; }
.hero__tagline {
  font-size: 11px; letter-spacing: 0.14em;
  color: var(--text-gray); text-transform: uppercase;
  margin-bottom: 40px; max-width: 480px;
}
.hero__tagline .cursor {
  color: var(--teal);
  animation: blink 1.1s step-end infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }
.hero__ctas { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

/* ===== Page Hero (inner pages) ===== */
.page-hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 700; letter-spacing: -0.02em; line-height: 1.1;
  margin-bottom: 18px;
}
.page-hero p {
  font-size: 14px; color: var(--text-gray);
  max-width: 520px; line-height: 1.8;
}

/* ===== Buttons ===== */
.btn {
  font-family: var(--font);
  font-size: 10px; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 13px 28px;
  display: inline-block; cursor: pointer; border: none;
  transition: all 0.15s;
}
.btn--primary  { background: var(--teal); color: var(--bg-dark); }
.btn--primary:hover { background: var(--text-cream); color: var(--bg-dark); text-decoration: none; }
.btn--outline  { background: transparent; color: var(--teal); border: 1px solid var(--teal); }
.btn--outline:hover { background: var(--teal); color: var(--bg-dark); text-decoration: none; }
.btn--light    { background: transparent; color: var(--text-dark); border: 1px solid var(--text-dark); }
.btn--light:hover { background: var(--text-dark); color: var(--bg-light); text-decoration: none; }

/* ===== Labels ===== */
.label {
  font-size: 10px; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--teal);
  display: block; margin-bottom: 12px;
}
.label--gray { color: var(--text-gray); }

/* ===== Section Headers ===== */
.section__header { margin-bottom: 48px; }
.section__header h2 {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 700; letter-spacing: -0.01em;
  line-height: 1.2; margin-bottom: 14px;
}
.section__header p {
  font-size: 13px; color: var(--text-gray);
  max-width: 540px; line-height: 1.8;
}
.light-section .section__header p { color: var(--text-dark); opacity: 0.65; }

/* ===== Divider ===== */
hr.divider {
  height: 1px; border: none;
  background: linear-gradient(to right, transparent, var(--teal-dark) 30%, var(--teal-dark) 70%, transparent);
}
hr.divider--solid { background: var(--border); }

/* ===== Services Grid ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.service-card {
  background: var(--bg-dark);
  padding: 40px 32px;
  transition: background 0.15s;
}
.service-card:hover { background: var(--bg-mid); }
.service-card__num {
  font-size: 10px; font-weight: 700; letter-spacing: 0.2em;
  color: var(--teal); display: block; margin-bottom: 18px;
}
.service-card h3 {
  font-size: 15px; font-weight: 700;
  margin-bottom: 10px; letter-spacing: 0.02em;
}
.service-card p { font-size: 12px; color: var(--text-gray); line-height: 1.8; }

/* ===== Full Services List (services page) ===== */
.service-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.service-row:first-child { border-top: 1px solid var(--border); }
.service-row__meta { padding-top: 2px; }
.service-row__meta .label { margin-bottom: 8px; }
.service-row__num {
  font-size: 28px; font-weight: 700; color: var(--border);
  letter-spacing: -0.02em;
}
.service-row h3 {
  font-size: 20px; font-weight: 700;
  margin-bottom: 12px; letter-spacing: -0.01em;
}
.service-row p {
  font-size: 13px; color: var(--text-gray);
  line-height: 1.8; margin-bottom: 16px;
}
.service-row .tags { margin-top: 0; }

/* ===== Tags ===== */
.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  font-size: 10px; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; padding: 4px 10px;
  border: 1px solid var(--border); color: var(--text-gray);
}

/* ===== Product Card ===== */
.product-card {
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
}
.product-card__content { padding: 48px; }
.product-card__badge {
  font-size: 10px; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; background: var(--teal-dark);
  color: var(--teal); padding: 4px 10px; display: inline-block;
  margin-bottom: 20px;
}
.product-card h3 {
  font-size: 28px; font-weight: 700;
  margin-bottom: 10px; letter-spacing: -0.01em;
}
.product-card__sub {
  font-size: 13px; color: var(--text-gray);
  margin-bottom: 28px; line-height: 1.8;
}
.product-card__visual {
  background: var(--bg-mid);
  border-left: 1px solid var(--border);
  aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 16px;
  color: var(--text-gray); font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase;
  overflow: hidden; position: relative;
}

/* Decorative mountain pass in product card visual */
.product-card__visual svg { opacity: 0.6; }

/* ===== How It Works ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0;
  border: 1px solid var(--border-lt);
  counter-reset: step;
}
.step {
  counter-increment: step;
  padding: 36px 28px;
  border-right: 1px solid var(--border-lt);
  position: relative;
}
.step:last-child { border-right: none; }
.step::before {
  content: counter(step, decimal-leading-zero);
  font-size: 10px; font-weight: 700; letter-spacing: 0.2em;
  color: var(--text-gray); display: block; margin-bottom: 16px;
}
.step h4 { font-size: 14px; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
.step p  { font-size: 12px; color: var(--text-dark); opacity: 0.6; line-height: 1.8; }

/* ===== Light Section ===== */
.light-section { background: var(--bg-light); color: var(--text-dark); }
.light-section .section__header h2 { color: var(--text-dark); }
.light-section .service-row { border-color: var(--border-lt); }
.light-section .service-row:first-child { border-color: var(--border-lt); }
.light-section .service-row__num { color: var(--border-lt); }
.light-section .tag { border-color: var(--border-lt); }

/* ===== About Philosophy ===== */
.philosophy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.philosophy__text .label { margin-bottom: 16px; }
.philosophy__text h2 {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 700; line-height: 1.2;
  margin-bottom: 24px;
}
.philosophy__text p {
  font-size: 13px; color: var(--text-gray);
  line-height: 1.9; margin-bottom: 16px;
}
.philosophy__visual {
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  padding: 40px; background: var(--bg-mid);
}
.philosophy__visual img { opacity: 0.85; }

/* ===== Founder ===== */
.founder {
  display: block;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  margin-top: 64px;
}
.founder__avatar {
  background: var(--bg-mid);
  border: 1px solid var(--border);
  aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-gray); font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase;
}
.founder h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.founder__role {
  font-size: 10px; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--teal); margin-bottom: 16px;
  display: block;
}
.founder p { font-size: 13px; color: var(--text-gray); line-height: 1.8; margin-bottom: 12px; }

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: start;
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group   { display: flex; flex-direction: column; gap: 7px; }
.form-group label {
  font-size: 10px; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--text-gray);
}
.form-group input,
.form-group textarea,
.form-group select {
  font-family: var(--font); font-size: 13px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text-cream); padding: 12px 16px;
  outline: none; transition: border-color 0.15s; width: 100%;
  appearance: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--teal); }
.form-group select { color: var(--text-gray); }
.form-group select option { background: var(--bg-dark); }
.form-group textarea { resize: vertical; min-height: 120px; }
.contact-info p {
  font-size: 13px; color: var(--text-gray);
  line-height: 1.9; margin-bottom: 32px;
}
.contact-link {
  display: block; padding: 18px 20px;
  border: 1px solid var(--border);
  margin-bottom: 12px; color: var(--text-cream);
  transition: border-color 0.15s, color 0.15s;
}
.contact-link:hover { border-color: var(--teal); color: var(--teal); text-decoration: none; }
.contact-link__type {
  font-size: 10px; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--text-gray); display: block; margin-bottom: 4px;
}
.contact-link__val { font-size: 13px; }

/* ===== Footer ===== */
.footer { border-top: 1px solid var(--border); padding: 40px 0; }
.footer__inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 28px;
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px; flex-wrap: wrap;
}
.footer__brand {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-gray);
}
.footer__links { list-style: none; display: flex; gap: 24px; }
.footer__links a {
  font-size: 10px; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--text-gray);
  transition: color 0.15s;
}
.footer__links a:hover { color: var(--teal); text-decoration: none; }
.footer__copy { font-size: 10px; color: var(--text-gray); letter-spacing: 0.05em; }

/* ===== Highlight ===== */
.hl { color: var(--teal); }

/* ===== Responsive ===== */
@media (max-width: 820px) {
  .product-card          { grid-template-columns: 1fr; }
  .product-card__visual  { border-left: none; border-top: 1px solid var(--border); aspect-ratio: 16/9; }
  .philosophy            { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid          { grid-template-columns: 1fr; gap: 40px; }
  .service-row           { grid-template-columns: 1fr; gap: 16px; }
  .founder               { grid-template-columns: 1fr; }
  .steps                 { grid-template-columns: 1fr 1fr; }
  .step                  { border-bottom: 1px solid var(--border-lt); }
  .step:nth-child(2n)    { border-right: none; }
}
@media (max-width: 600px) {
  .nav__links            { display: none; }
  .nav__hamburger        { display: flex; }
  .hero__logo            { max-width: 300px; }
  .hero__ctas            { flex-direction: column; align-items: center; }
  .steps                 { grid-template-columns: 1fr; }
  .step                  { border-right: none; }
  .footer__links         { display: none; }
  .footer__inner         { flex-direction: column; text-align: center; }
  .section               { padding: 56px 0; }
}