/* ==========================================================================
   Enterprise Systems Direct
   Theme: IBM-inspired black & blue
   ========================================================================== */

:root {
  --black: #000000;
  --gray-100-dark: #161616;
  --gray-90: #262626;
  --gray-80: #393939;
  --gray-70: #525252;
  --gray-60: #6f6f6f;
  --gray-30: #c6c6c6;
  --gray-20: #e0e0e0;
  --gray-10: #f4f4f4;
  --white: #ffffff;

  --blue-60: #0f62fe;
  --blue-70: #0043ce;
  --blue-80: #002d9c;
  --blue-50: #4589ff;
  --blue-40: #78a9ff;
  --blue-20: #d0e2ff;
  --blue-10: #edf5ff;

  --red: #da1e28;
  --green: #24a148;

  --font-sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", Menlo, Consolas, monospace;

  --maxw: 1200px;
  --header-h: 68px;
  --ease: cubic-bezier(0.2, 0, 0.38, 0.9);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-100-dark);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: var(--blue-60); text-decoration: none; }
a:hover { color: var(--blue-70); }

h1, h2, h3 { margin: 0; line-height: 1.15; font-weight: 400; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }

:focus-visible {
  outline: 2px solid var(--blue-60);
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}
.narrow { max-width: 860px; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--blue-60);
  color: var(--white);
  padding: 10px 16px;
  z-index: 200;
}
.skip-link:focus { left: 8px; color: var(--white); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  justify-content: space-between;
  font-family: inherit;
  font-size: 15px;
  font-weight: 400;
  line-height: 1;
  padding: 17px 20px 17px 20px;
  min-width: 190px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease), color 0.15s var(--ease);
}
.btn-primary { background: var(--blue-60); color: var(--white); }
.btn-primary:hover { background: var(--blue-70); color: var(--white); }
.btn-primary:active { background: var(--blue-80); }
.btn-ghost { background: transparent; color: var(--white); border-color: var(--white); }
.btn-ghost:hover { background: var(--white); color: var(--gray-100-dark); }
.btn-sm { padding: 12px 16px; min-width: 0; gap: 0; }
.btn[disabled] { background: var(--gray-60); cursor: not-allowed; }
.arrow { transition: transform 0.15s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--gray-100-dark);
  border-bottom: 1px solid var(--gray-80);
  transition: box-shadow 0.2s var(--ease);
}
.site-header.is-scrolled { box-shadow: 0 2px 12px rgba(0, 0, 0, 0.45); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
}
.brand:hover { color: var(--white); }
.brand-text { font-size: 17px; font-weight: 300; letter-spacing: 0.01em; }
.brand-text strong { font-weight: 600; }

.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a:not(.btn) {
  color: var(--gray-30);
  font-size: 14px;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
}
.site-nav a:not(.btn):hover { color: var(--white); border-color: var(--blue-50); }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--white);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 27px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(15, 98, 254, 0.35), transparent 60%),
    linear-gradient(180deg, #161616 0%, #0b0b0b 100%);
  color: var(--white);
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, #000 20%, transparent 95%);
  mask-image: linear-gradient(180deg, #000 20%, transparent 95%);
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 64px;
  align-items: center;
  padding-top: 96px;
  padding-bottom: 104px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-60);
  margin-bottom: 16px;
}
.hero .eyebrow, .eyebrow-light { color: var(--blue-40); }

.hero h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.6rem);
  font-weight: 300;
  margin-bottom: 24px;
}
.hero h1 .accent { color: var(--blue-40); font-weight: 400; }
.lead {
  font-size: 1.125rem;
  font-weight: 300;
  color: var(--gray-30);
  max-width: 600px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-panel {
  background: rgba(38, 38, 38, 0.8);
  border: 1px solid var(--gray-80);
  border-top: 3px solid var(--blue-60);
  padding: 28px;
  backdrop-filter: blur(4px);
}
.panel-title {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-30);
  margin-bottom: 18px;
}
.panel-list { list-style: none; margin: 0 0 22px; padding: 0; }
.panel-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--gray-80);
  font-size: 15px;
}
.panel-list li span:nth-child(2) { flex: 1; }
.panel-list em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-40);
  border: 1px solid var(--blue-70);
  padding: 2px 6px;
}
.dot { width: 8px; height: 8px; background: var(--gray-60); flex: none; }
.dot-blue { background: var(--blue-50); }
.panel-link { color: var(--blue-40); font-size: 14px; }
.panel-link:hover { color: var(--white); }

/* ---------- Strip ---------- */
.strip { background: var(--blue-60); color: var(--white); }
.strip-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.strip-item {
  padding: 28px 24px;
  border-left: 1px solid rgba(255, 255, 255, 0.25);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.strip-item:first-child { border-left: 0; padding-left: 0; }
.strip-item strong { font-weight: 600; font-size: 16px; }
.strip-item span { font-size: 14px; opacity: 0.88; line-height: 1.45; }

/* ---------- Sections ---------- */
.section { padding: 104px 0; }
.section-dark { background: var(--gray-100-dark); color: var(--white); }
.section-light { background: var(--gray-10); }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(1.8rem, 3.2vw, 2.5rem); font-weight: 300; }
.section-sub { margin-top: 16px; font-size: 1.05rem; color: var(--gray-70); }
.section-dark .section-sub { color: var(--gray-30); }
.fineprint { margin-top: 32px; font-size: 13px; color: var(--gray-60); }

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--gray-20);
  margin-bottom: 40px;
  overflow-x: auto;
}
.tab {
  font-family: inherit;
  font-size: 15px;
  background: none;
  border: 0;
  border-bottom: 3px solid transparent;
  padding: 14px 28px;
  color: var(--gray-70);
  cursor: pointer;
  white-space: nowrap;
  margin-bottom: -1px;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease), background 0.15s var(--ease);
}
.tab:hover { background: var(--gray-10); color: var(--gray-100-dark); }
.tab.is-active { color: var(--gray-100-dark); border-bottom-color: var(--blue-60); font-weight: 500; }

.tab-panel[hidden] { display: none; }
.tab-panel.is-active { animation: fadeUp 0.35s var(--ease); }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: var(--gray-10);
  padding: 32px 28px 36px;
  border-top: 3px solid transparent;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}
.card:hover {
  border-top-color: var(--blue-60);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}
.card-icon { width: 40px; height: 40px; color: var(--blue-60); margin-bottom: 24px; }
.card-icon svg { width: 100%; height: 100%; }
.card h3 { font-size: 1.3rem; margin-bottom: 12px; }
.card p { color: var(--gray-70); margin: 0; font-size: 15px; }

/* ---------- Features ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--gray-80);
  border: 1px solid var(--gray-80);
}
.feature {
  background: var(--gray-100-dark);
  padding: 36px 32px 40px;
  transition: background 0.2s var(--ease);
}
.feature:hover { background: var(--gray-90); }
.feature-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--blue-40);
  margin-bottom: 40px;
}
.feature h3 { font-size: 1.25rem; margin-bottom: 12px; }
.feature p { margin: 0; color: var(--gray-30); font-size: 15px; }

/* ---------- Split / MSP ---------- */
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}
.split-copy h2 { font-size: clamp(1.8rem, 3.2vw, 2.5rem); font-weight: 300; margin-bottom: 20px; }
.split-copy p { color: var(--gray-70); font-size: 1.05rem; }

.checklist { list-style: none; padding: 0; margin: 28px 0 36px; }
.checklist li {
  position: relative;
  padding: 10px 0 10px 32px;
  border-bottom: 1px solid var(--gray-20);
  font-size: 15px;
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 17px;
  width: 12px;
  height: 6px;
  border-left: 2px solid var(--blue-60);
  border-bottom: 2px solid var(--blue-60);
  transform: rotate(-45deg);
}

.split-visual {
  background: var(--gray-100-dark);
  padding: 40px;
  border-left: 4px solid var(--blue-60);
}
.rack { display: flex; flex-direction: column; gap: 10px; }
.rack-unit {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--gray-90);
  border: 1px solid var(--gray-80);
  padding: 14px 16px;
}
.rack-unit i {
  width: 8px;
  height: 8px;
  background: var(--gray-70);
  display: block;
  flex: none;
}
.rack-unit i.on { background: var(--blue-50); box-shadow: 0 0 8px var(--blue-50); animation: blink 2.6s infinite; }
.rack-unit:nth-child(2n) i.on { animation-delay: 0.8s; }
.rack-unit:nth-child(3n) i.on { animation-delay: 1.5s; }
.rack-unit span {
  flex: 1;
  height: 6px;
  margin-left: 10px;
  background: repeating-linear-gradient(90deg, var(--gray-80) 0 6px, transparent 6px 10px);
}

/* ---------- Steps ---------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
}
.step { position: relative; padding-top: 8px; }
.step::before {
  content: "";
  position: absolute;
  top: 24px;
  left: 48px;
  right: -32px;
  height: 2px;
  background: var(--gray-30);
}
.step:last-child::before { display: none; }
.step-dot {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: var(--blue-60);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 14px;
  margin-bottom: 24px;
  margin-top: 8px;
}
.step h3 { font-size: 1.25rem; margin-bottom: 8px; }
.step p { margin: 0; font-size: 15px; color: var(--gray-70); }

/* ---------- FAQ ---------- */
.faq details { border-top: 1px solid var(--gray-20); }
.faq details:last-child { border-bottom: 1px solid var(--gray-20); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 48px 22px 0;
  font-size: 1.1rem;
  position: relative;
  transition: color 0.15s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--blue-60); }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--blue-60);
}
.faq details[open] summary::after { content: "\2212"; }
.faq details p { padding: 0 48px 24px 0; margin: 0; color: var(--gray-70); }

/* ---------- Form ---------- */
.section-form {
  background:
    radial-gradient(800px 400px at 0% 0%, rgba(15, 98, 254, 0.25), transparent 60%),
    var(--gray-100-dark);
  color: var(--white);
}
.form-wrap {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 72px;
  align-items: start;
}
.form-intro h2 { font-size: clamp(1.8rem, 3.2vw, 2.5rem); font-weight: 300; margin-bottom: 20px; }
.form-intro > p { color: var(--gray-30); font-size: 1.05rem; }
.contact-list { list-style: none; padding: 0; margin: 32px 0 0; }
.contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 16px 0;
  border-top: 1px solid var(--gray-80);
  font-size: 15px;
  color: var(--gray-20);
}
.contact-list li span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-40);
}

.form {
  background: var(--gray-90);
  padding: 40px;
  border-top: 3px solid var(--blue-60);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { margin-bottom: 22px; border: 0; padding: 0; min-width: 0; }
.field label, .fieldset legend {
  display: block;
  font-size: 12px;
  color: var(--gray-30);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
  padding: 0;
}
.req { color: var(--blue-40); }

.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field select,
.field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  color: var(--white);
  background: var(--gray-100-dark);
  border: 0;
  border-bottom: 1px solid var(--gray-60);
  padding: 13px 14px;
  border-radius: 0;
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
  appearance: none;
  -webkit-appearance: none;
}
.field select {
  background-image: linear-gradient(45deg, transparent 50%, var(--gray-30) 50%), linear-gradient(135deg, var(--gray-30) 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 36px;
}
.field select option { background: var(--gray-100-dark); color: var(--white); }
.field textarea { resize: vertical; min-height: 120px; }
.field input:hover, .field select:hover, .field textarea:hover { background: #1c1c1c; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--blue-50);
  outline-offset: -2px;
  border-bottom-color: transparent;
}
.field.has-error input, .field.has-error select, .field.has-error textarea {
  outline: 2px solid var(--red);
  outline-offset: -2px;
}
.error { display: block; min-height: 0; font-size: 12px; color: #ff8389; margin-top: 6px; }
.error:empty { display: none; }

.fieldset { margin-bottom: 24px; }
.checks { display: flex; flex-wrap: wrap; gap: 10px; }
.check { margin: 0 !important; cursor: pointer; }
.check input { position: absolute; opacity: 0; pointer-events: none; }
.check span {
  display: inline-block;
  padding: 9px 18px;
  font-size: 14px;
  color: var(--gray-20);
  background: var(--gray-100-dark);
  border: 1px solid var(--gray-70);
  border-radius: 999px;
  transition: all 0.15s var(--ease);
}
.check:hover span { border-color: var(--blue-50); }
.check input:checked + span { background: var(--blue-60); border-color: var(--blue-60); color: var(--white); }
.check input:focus-visible + span { outline: 2px solid var(--blue-40); outline-offset: 2px; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-footer { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; margin-top: 8px; }
.form-note { margin: 0; font-size: 12px; color: var(--gray-60); flex: 1; min-width: 200px; }

.form-status { margin-top: 24px; padding: 16px 20px; font-size: 15px; border-left: 4px solid; }
.form-status.is-success { background: rgba(36, 161, 72, 0.12); border-color: var(--green); color: #a7f0ba; }
.form-status.is-error { background: rgba(218, 30, 40, 0.14); border-color: var(--red); color: #ffd7d9; }
.form-status[hidden] { display: none; }

/* ---------- Footer ---------- */
.site-footer { background: var(--black); color: var(--gray-30); padding-top: 56px; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  padding-bottom: 40px;
}
.footer-brand { max-width: 360px; }
.footer-brand p { margin-top: 16px; font-size: 14px; color: var(--gray-60); }
.footer-nav { display: flex; gap: 28px; flex-wrap: wrap; align-items: flex-start; }
.footer-nav a { color: var(--gray-30); font-size: 14px; }
.footer-nav a:hover { color: var(--white); }
.footer-legal { border-top: 1px solid var(--gray-90); padding-top: 24px; padding-bottom: 40px; }
.footer-legal p { font-size: 12px; color: var(--gray-60); margin: 0 0 8px; max-width: 820px; }

/* ---------- Animation ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; padding-top: 72px; padding-bottom: 72px; }
  .cards, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .split, .form-wrap { grid-template-columns: 1fr; gap: 48px; }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 48px; }
  .step:nth-child(2)::before { display: none; }
  .strip-inner { grid-template-columns: repeat(2, 1fr); }
  .strip-item:nth-child(3) { border-left: 0; padding-left: 0; }
  .strip-item:nth-child(n+3) { border-top: 1px solid rgba(255, 255, 255, 0.25); }
}

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--gray-100-dark);
    border-bottom: 1px solid var(--gray-80);
    padding: 8px 24px 24px;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
  }
  .site-nav.is-open { opacity: 1; transform: none; visibility: visible; }
  .site-nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--gray-80); font-size: 16px; }
  .site-nav .btn { margin-top: 16px; justify-content: center; }
}

@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .container { padding: 0 20px; }
  .cards, .feature-grid, .steps, .form-row { grid-template-columns: 1fr; }
  .step::before { display: none; }
  .strip-inner { grid-template-columns: 1fr; }
  .strip-item { border-left: 0 !important; padding-left: 0 !important; padding: 20px 0; }
  .strip-item + .strip-item { border-top: 1px solid rgba(255, 255, 255, 0.25); }
  .form { padding: 28px 20px; }
  .hero-actions .btn { width: 100%; }
  .tab { padding: 14px 18px; }
}