/* ==========================================================================
   ATHION GROUP — ARCHITECTURAL CSS DESIGN SYSTEM
   Palette: #0A0A0A (Near-black), #FFFFFF (White), #8A8A8A (Grey), #E8E8E8 (Hairline)
   Typography: Syne (Display) & Plus Jakarta Sans (Body)
   ========================================================================== */

:root {
  --color-bg: #FFFFFF;
  --color-dark: #0A0A0A;
  --color-text: #0A0A0A;
  --color-muted: #8A8A8A;
  --color-border: #E8E8E8;
  --color-card-bg: #FAFAFA;
  
  --font-display: 'Syne', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  --container-max: 1360px;
  --header-height: 80px;
  
  --transition-fast: 0.15s ease;
  --transition-medium: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Typography Scale */
h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-dark);
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.5rem, 6.5vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.8rem);
}

h4 {
  font-size: 1.1rem;
}

p {
  color: #222222;
  font-size: 1.05rem;
  max-width: 70ch;
}

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

.text-lead {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.5;
  color: var(--color-dark);
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

a:hover {
  opacity: 0.7;
}

/* Focus States */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-dark);
  outline-offset: 3px;
}

/* Base Layout Utility */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.grid {
  display: grid;
  gap: 0;
}

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

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

.grid-5 {
  grid-template-columns: repeat(5, 1fr);
}

.border-hairline {
  border: 1px solid var(--color-border);
}

.border-b {
  border-bottom: 1px solid var(--color-border);
}

.border-t {
  border-top: 1px solid var(--color-border);
}

.border-r {
  border-right: 1px solid var(--color-border);
}

.border-l {
  border-left: 1px solid var(--color-border);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-tag {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--color-dark);
  letter-spacing: 0.05em;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.5rem 0;
  position: relative;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-dark);
}

/* Nav Dropdown */
.nav-dropdown-wrapper {
  position: relative;
}

.nav-dropdown-trigger {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0;
}

.dropdown-arrow {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--color-dark);
  border-bottom: 1.5px solid var(--color-dark);
  transform: rotate(45deg);
  margin-top: -3px;
  transition: transform var(--transition-fast);
}

.nav-dropdown-wrapper:hover .dropdown-arrow,
.nav-dropdown-wrapper:focus-within .dropdown-arrow {
  transform: rotate(225deg);
  margin-top: 3px;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 260px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  padding: 0.75rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-fast);
}

.nav-dropdown-wrapper:hover .nav-dropdown-menu,
.nav-dropdown-wrapper:focus-within .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-item {
  display: block;
  padding: 0.6rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 500;
  border-bottom: 1px solid transparent;
}

.nav-dropdown-item:hover {
  background-color: var(--color-card-bg);
  opacity: 1;
}

/* Nav Actions & Mobile Toggle */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.btn-header {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--color-dark);
  background-color: var(--color-dark);
  color: var(--color-bg);
}

.btn-header:hover {
  background-color: transparent;
  color: var(--color-dark);
  opacity: 1;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 32px;
  position: relative;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
}

.mobile-nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-dark);
  transition: transform var(--transition-medium), opacity var(--transition-medium);
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: var(--color-bg);
  z-index: 99;
  display: flex;
  flex-direction: column;
  padding: 2rem 1.5rem;
  transform: translateX(100%);
  transition: transform var(--transition-medium);
  overflow-y: auto;
  border-top: 1px solid var(--color-border);
}

.mobile-drawer.is-active {
  transform: translateX(0);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.mobile-nav-link {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.mobile-sub-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-left: 1.25rem;
  margin-top: 0.75rem;
  border-left: 2px solid var(--color-border);
}

.mobile-sub-link {
  font-size: 1rem;
  font-weight: 500;
}

/* Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid var(--color-dark);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-dark);
  opacity: 1;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-dark);
}

.btn-secondary:hover {
  background-color: var(--color-dark);
  color: var(--color-bg);
  opacity: 1;
}

.btn-whatsapp {
  background-color: #0A0A0A;
  color: #FFFFFF;
  border-color: #0A0A0A;
  position: relative;
}

.btn-whatsapp::before {
  content: '•';
  color: #25D366;
  font-size: 1.5rem;
  line-height: 0;
  margin-right: 0.5rem;
}

.btn-whatsapp:hover {
  background-color: #25D366;
  border-color: #25D366;
  color: #FFFFFF;
  opacity: 1;
}

/* Section Components */
.section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.section-hero {
  padding-top: 4rem;
  padding-bottom: 5rem;
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background-color: var(--color-dark);
}

.hero-title {
  margin-bottom: 2.5rem;
}

.hero-split {
  display: grid;
  grid-template-columns: 2fr 1fr;
  border: 1px solid var(--color-border);
}

.hero-split-left {
  padding: 3rem;
  border-right: 1px solid var(--color-border);
}

.hero-split-right {
  padding: 3rem;
  background-color: var(--color-card-bg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.metric-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.metric-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
}

/* Service Grid Cards */
.services-grid-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-left: 1px solid var(--color-border);
  border-top: 1px solid var(--color-border);
}

.service-card {
  padding: 2.5rem;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 320px;
  transition: background-color var(--transition-fast);
}

.service-card:hover {
  background-color: var(--color-card-bg);
}

.service-card-num {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.service-card-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.service-card-desc {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
}

.service-card-link {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.service-card-link::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.service-card:hover .service-card-link::after {
  transform: translateX(4px);
}

/* Proof Strip / Logos */
.proof-strip {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 3rem 0;
  background-color: #FAFAFA;
}

.proof-header {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  margin-bottom: 2rem;
  text-align: center;
}

.proof-logos {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  align-items: center;
  gap: 1.5rem;
}

.logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem 1rem;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  min-height: 72px;
  transition: border-color var(--transition-smooth), transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.logo-item:hover {
  border-color: #0A0A0A;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}

.partner-logo-img {
  max-height: 32px;
  max-width: 140px;
  width: auto;
  height: auto;
  object-fit: contain;
  mix-blend-mode: multiply;
  filter: grayscale(100%) opacity(0.85);
  transition: filter var(--transition-smooth);
}

.logo-item:hover .partner-logo-img {
  filter: grayscale(0%) opacity(1);
}

/* Service Detail Page Components */
.deliverables-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.deliverable-item {
  padding: 1.75rem 2rem;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.deliverable-item strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
}

.deliverable-item p {
  font-size: 0.95rem;
  color: var(--color-muted);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.process-step {
  padding: 2rem;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.step-num {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--color-dark);
}

.target-audience-box {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  padding: 3rem;
}

.audience-list {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  list-style: none;
}

.audience-item {
  position: relative;
  padding-left: 1.5rem;
  font-weight: 600;
  font-size: 1rem;
}

.audience-item::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-dark);
  font-weight: 800;
}

/* Contact Page Layout & Form */
.contact-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  border: 1px solid var(--color-border);
}

.contact-form-container {
  padding: 3.5rem;
  border-right: 1px solid var(--color-border);
}

.contact-info-container {
  padding: 3.5rem;
  background-color: var(--color-card-bg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.form-group {
  margin-bottom: 1.75rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-dark);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0;
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-dark);
  outline: none;
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.info-block {
  margin-bottom: 2.5rem;
}

.info-block-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.info-block-content {
  font-size: 1.1rem;
  font-weight: 600;
}

/* CTA Section */
.cta-banner {
  border: 1px solid var(--color-border);
  padding: 4rem 3rem;
  background-color: var(--color-dark);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.cta-banner h2 {
  color: var(--color-bg);
  max-width: 25ch;
}

.cta-banner p {
  color: #CCCCCC;
  margin-top: 0.75rem;
}

/* Shared Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  border-bottom: 1px solid var(--color-border);
}

.footer-col {
  padding: 3.5rem 2.5rem;
  border-right: 1px solid var(--color-border);
}

.footer-col:last-child {
  border-right: none;
}

.footer-col-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: #333333;
}

.footer-bottom {
  padding: 1.5rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* Page Reveals / Motion */
@media (prefers-reduced-motion: no-preference) {
  .reveal-on-scroll {
    opacity: 1; /* Ensure elements remain visible even if observer is slow */
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease;
  }
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-split {
    grid-template-columns: 1fr;
  }

  .hero-split-left {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .services-grid-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .deliverables-list {
    grid-template-columns: 1fr;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-form-container {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

  .footer-col {
    border-bottom: 1px solid var(--color-border);
  }
}

@media (max-width: 768px) {
  .nav-desktop, .btn-header {
    display: none;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .services-grid-container {
    grid-template-columns: 1fr;
  }

  .proof-logos {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .process-grid {
    grid-template-columns: 1fr;
  }

  .audience-list {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-col {
    border-right: none;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
}

/* Inline Form Status Feedback */
#form-status {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.4;
  display: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#form-status.status-success {
  background-color: #0A0A0A;
  color: #FFFFFF;
  border: 1px solid #0A0A0A;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}