/* RealTime Alliances · modern single-page layout */

:root {
  --rta-bg: #050816;
  --rta-bg-alt: #070b1f;
  --rta-card-bg: rgba(15, 23, 42, 0.96);
  --rta-border-subtle: rgba(148, 163, 184, 0.22);
  --rta-accent: #38bdf8;
  --rta-accent-soft: rgba(56, 189, 248, 0.15);
  --rta-text: #e5e7eb;
  --rta-text-muted: #9ca3af;
  --rta-text-soft: #6b7280;
  --rta-radius-lg: 18px;
  --rta-radius-pill: 999px;
  --rta-shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.65);
  --rta-shadow-subtle: 0 12px 35px rgba(15, 23, 42, 0.5);
  --rta-nav-width: 320px;
  --rta-transition-fast: 150ms ease-out;
  --rta-transition-med: 220ms ease-out;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: radial-gradient(circle at top left, #0b1120 0, var(--rta-bg) 55%)
    fixed;
  color: var(--rta-text);
}

/* Layout */

.rta-app {
  display: grid;
  grid-template-columns: var(--rta-nav-width) minmax(0, 1fr);
  min-height: 100vh;
}

/* Sidebar */

.rta-sidebar {
  position: sticky;
  top: 0;
  align-self: flex-start;
  height: 100vh;
  padding: 32px 28px;
  backdrop-filter: blur(30px);
  background: linear-gradient(
    180deg,
    rgba(15, 23, 42, 0.9),
    rgba(15, 23, 42, 0.98)
  );
  border-right: 1px solid rgba(148, 163, 184, 0.18);
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 20;
}

.rta-logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.rta-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: radial-gradient(circle at 0% 0%, #38bdf8 0, #22c55e 40%, #6366f1 100%);
  color: #0b1120;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.4), 0 18px 45px rgba(15, 23, 42, 0.9);
}

.rta-logo-title {
  display: block;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #e5e7eb;
}

.rta-logo-subtitle {
  display: block;
  font-size: 0.75rem;
  color: var(--rta-text-soft);
}

/* Nav */

.rta-nav {
  position: relative;
}

.rta-nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(15, 23, 42, 0.9);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.rta-nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #e5e7eb;
}

.rta-nav-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rta-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rta-text-soft);
  border: 1px solid transparent;
  transition: background var(--rta-transition-med),
    color var(--rta-transition-med), border-color var(--rta-transition-med);
}

.rta-nav-link::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: transparent;
  box-shadow: 0 0 0 0 rgba(56, 189, 248, 0);
  transition: all var(--rta-transition-med);
}

.rta-nav-link:hover {
  background: rgba(15, 23, 42, 0.9);
  border-color: rgba(148, 163, 184, 0.5);
  color: #e5e7eb;
}

.rta-nav-link.is-active {
  background: radial-gradient(circle at 0% 0%, #38bdf8 0, #6366f1 45%, #0f172a 80%);
  color: #0b1120;
  border-color: rgba(148, 163, 184, 0.8);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9);
}

.rta-nav-link.is-active::after {
  background: #22c55e;
  box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.3);
}

/* Sidebar footer */

.rta-sidebar-footer {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed rgba(148, 163, 184, 0.4);
}

.rta-social {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.rta-social a {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(148, 163, 184, 0.6);
  color: var(--rta-text-muted);
  text-decoration: none;
  background: radial-gradient(circle at 30% 0%, #111827 0, #020617 70%);
  transition: transform var(--rta-transition-fast),
    border-color var(--rta-transition-fast), color var(--rta-transition-fast),
    box-shadow var(--rta-transition-fast);
}

.rta-social a:hover {
  transform: translateY(-2px);
  border-color: var(--rta-accent);
  color: var(--rta-accent);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.95);
}

.rta-footer-text {
  margin: 0;
  font-size: 0.75rem;
  color: var(--rta-text-soft);
}

/* Main content */

.rta-main {
  min-height: 100vh;
  padding: 40px 44px 40px 40px;
  position: relative;
}

.rta-main::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at top right, #22c55e10 0, transparent 45%),
    radial-gradient(circle at bottom left, #38bdf810 0, transparent 45%);
  pointer-events: none;
  z-index: -1;
}

.rta-section {
  max-width: 1040px;
  margin: 0 auto 56px;
  padding: 32px 32px 40px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.98));
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: var(--rta-shadow-soft);
}

.rta-section:last-of-type {
  margin-bottom: 0;
}

/* Section header */

.rta-section-header {
  max-width: 640px;
  margin-bottom: 28px;
}

.rta-section-header h2 {
  margin: 0 0 10px;
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.rta-section-header p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--rta-text-muted);
}

/* Hero */

.rta-hero {
  margin-top: 0;
  margin-bottom: 56px;
}

.rta-hero-content {
  max-width: 720px;
}

.rta-kicker {
  margin: 0 0 10px;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rta-text-soft);
}

.rta-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2.2rem, 2.1rem + 0.8vw, 2.7rem);
  letter-spacing: -0.03em;
}

.rta-hero-lead {
  margin: 0 0 22px;
  font-size: 1rem;
  color: var(--rta-text-muted);
}

.rta-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

/* Buttons */

.rta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--rta-radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--rta-transition-med),
    border-color var(--rta-transition-med), color var(--rta-transition-med),
    box-shadow var(--rta-transition-med), transform var(--rta-transition-fast);
}

.rta-btn-primary {
  background: radial-gradient(circle at 0% 0%, #22c55e 0, #38bdf8 38%, #6366f1 90%);
  color: #020617;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.9);
}

.rta-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 26px 60px rgba(15, 23, 42, 1);
}

.rta-btn-ghost {
  background: rgba(15, 23, 42, 0.9);
  color: var(--rta-text);
  border-color: rgba(148, 163, 184, 0.5);
}

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

.rta-btn-icon {
  display: inline-flex;
  width: 20px;
  height: 20px;
  border-radius: 999px;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.15);
}

.rta-btn-full {
  width: 100%;
}

/* Metrics */

.rta-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
}

.rta-metrics dt {
  font-size: 1rem;
  font-weight: 600;
}

.rta-metrics dd {
  margin: 4px 0 0;
  font-size: 0.78rem;
  color: var(--rta-text-soft);
}

/* Grid helpers */

.rta-grid {
  display: grid;
  gap: 18px;
}

.rta-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.rta-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* Cards */

.rta-card {
  padding: 18px 18px 20px;
  border-radius: var(--rta-radius-lg);
  background: radial-gradient(circle at top left, #0b1120 0, #020617 60%);
  border: 1px solid var(--rta-border-subtle);
  box-shadow: var(--rta-shadow-subtle);
}

.rta-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.rta-card p {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: var(--rta-text-muted);
}

/* Lists & tags */

.rta-list {
  list-style: none;
  padding-left: 0;
  margin: 4px 0 0;
}

.rta-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--rta-text-muted);
  margin-top: 6px;
}

.rta-list i {
  color: #22c55e;
  font-size: 0.8rem;
}

.rta-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}

.rta-tag-list li {
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  font-size: 0.72rem;
  color: var(--rta-text-soft);
  background: rgba(15, 23, 42, 0.8);
}

/* Services */

.rta-service {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rta-service-icon {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--rta-accent-soft);
  color: var(--rta-accent);
  margin-bottom: 6px;
}

/* Portfolio */

.rta-portfolio-card {
  position: relative;
  overflow: hidden;
}

.rta-portfolio-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  font-size: 0.72rem;
  color: var(--rta-text-soft);
  margin-bottom: 8px;
}

.rta-portfolio-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 120% 0%, rgba(56, 189, 248, 0.14), transparent 52%);
  opacity: 0;
  transition: opacity var(--rta-transition-med);
}

.rta-portfolio-card:hover::after {
  opacity: 1;
}

/* Clients */

.rta-client-card {
  min-height: 150px;
}

/* Highlight */

.rta-highlight {
  margin-top: 24px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px dashed rgba(148, 163, 184, 0.55);
}

.rta-highlight p {
  margin: 0;
  font-size: 0.9rem;
}

.rta-highlight p + p {
  margin-top: 6px;
}

.rta-highlight-icon {
  color: var(--rta-accent);
  margin-top: 3px;
}

.rta-highlight-author {
  font-size: 0.8rem;
  color: var(--rta-text-soft);
}

/* Contact */

.rta-contact {
  background: linear-gradient(
    135deg,
    rgba(15, 23, 42, 0.96),
    rgba(15, 23, 42, 1)
  );
}

.rta-form {
  display: grid;
  gap: 10px;
}

.rta-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rta-field label {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rta-text-soft);
}

.rta-field input,
.rta-field select,
.rta-field textarea {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  padding: 9px 10px;
  font-size: 0.9rem;
  color: var(--rta-text);
  background: rgba(15, 23, 42, 0.85);
  outline: none;
  transition: border-color var(--rta-transition-med),
    box-shadow var(--rta-transition-med), background var(--rta-transition-med);
}

.rta-field input:focus,
.rta-field select:focus,
.rta-field textarea:focus {
  border-color: var(--rta-accent);
  background: rgba(15, 23, 42, 1);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.5);
}

.rta-field textarea {
  resize: vertical;
  min-height: 120px;
}

.rta-form-hint {
  margin: 6px 0 0;
  font-size: 0.75rem;
  color: var(--rta-text-soft);
}

.rta-contact-details h3 {
  margin-bottom: 6px;
}

.rta-contact-list {
  list-style: none;
  padding-left: 0;
  margin: 10px 0 10px;
}

.rta-contact-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--rta-text-muted);
  margin-bottom: 4px;
}

.rta-contact-list i {
  color: var(--rta-accent);
  font-size: 0.9rem;
}

.rta-contact-list a {
  color: inherit;
  text-decoration: none;
}

.rta-contact-list a:hover {
  color: var(--rta-accent);
}

/* Animations */

[data-section] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 380ms ease-out, transform 380ms ease-out;
}

[data-section].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Utility */

.rta-animate-up {
  will-change: transform, opacity;
}

/* Responsive */

@media (max-width: 1024px) {
  :root {
    --rta-nav-width: 260px;
  }

  .rta-main {
    padding-inline: 26px;
  }

  .rta-section {
    padding-inline: 22px;
  }
}

@media (max-width: 880px) {
  .rta-app {
    grid-template-columns: 1fr;
  }

  .rta-sidebar {
    position: sticky;
    top: 0;
    flex-direction: row;
    align-items: center;
    height: auto;
    padding-block: 12px;
    padding-inline: 16px;
    border-right: none;
    border-bottom: 1px solid rgba(148, 163, 184, 0.4);
    gap: 10px;
  }

  .rta-logo-title {
    font-size: 0.9rem;
  }

  .rta-logo-subtitle {
    display: none;
  }

  .rta-nav {
    margin-left: auto;
  }

  .rta-nav-toggle {
    display: inline-flex;
  }

  .rta-nav-list {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    width: min(260px, 100vw - 24px);
    padding: 10px;
    border-radius: 18px;
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(148, 163, 184, 0.55);
    backdrop-filter: blur(12px);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 1);
    transform-origin: top right;
    transform: scale(0.94);
    opacity: 0;
    visibility: hidden;
    transition: opacity 140ms ease-out, transform 140ms ease-out,
      visibility 140ms ease-out;
    z-index: 30;
  }

  .rta-nav-list.is-open {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
  }

  .rta-sidebar-footer {
    display: none;
  }

  .rta-main {
    padding: 20px 16px 28px;
  }

  .rta-section {
    margin-bottom: 32px;
    padding: 20px 18px 22px;
  }

  .rta-hero h1 {
    font-size: 1.9rem;
  }

  .rta-hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .rta-metrics {
    grid-template-columns: 1fr;
  }

  .rta-grid-2 {
    grid-template-columns: 1fr;
  }

  .rta-grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 520px) {
  .rta-section-header h2 {
    font-size: 1.1rem;
  }

  .rta-card {
    padding-inline: 14px;
  }
}