/* ============================================================
   ZENTRO WORKS — DESIGN SYSTEM CSS
   Design Reference: /design-system.md
   Author: Zentro Works
   ============================================================ */

/* ------------------------------------------------------------
   1. CUSTOM PROPERTIES
   ------------------------------------------------------------ */
:root {
  /* Colours */
  --color-bg:          #FFFFFF;
  --color-bg-alt:      #F8FAFC;
  --color-bg-dark:     #0F172A;
  --color-blue:        #2563EB;
  --color-blue-dark:   #1D4ED8;
  --color-blue-light:  #EFF6FF;
  --color-blue-mid:    #DBEAFE;
  --color-text:        #0F172A;
  --color-text-muted:  #64748B;
  --color-border:      #E2E8F0;
  --color-shadow:      rgba(15, 23, 42, 0.06);

  /* Typography */
  --font-display:      'Sora', sans-serif;
  --font-body:         'Inter', sans-serif;

  --text-xs:   12px;
  --text-sm:   14px;
  --text-base: 16px;
  --text-lg:   18px;
  --text-xl:   20px;
  --text-2xl:  24px;
  --text-3xl:  32px;
  --text-4xl:  48px;
  --text-5xl:  64px;

  /* Spacing (8pt) */
  --s-1:   8px;
  --s-2:   16px;
  --s-3:   24px;
  --s-4:   32px;
  --s-5:   40px;
  --s-6:   48px;
  --s-8:   64px;
  --s-10:  80px;
  --s-12:  96px;
  --s-16: 128px;

  /* Border */
  --border:             1px solid #E2E8F0;
  --border-radius-sm:   8px;
  --border-radius-md:   12px;
  --border-radius-lg:   16px;
  --border-radius-xl:   24px;
  --border-radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md: 0 4px 16px rgba(15,23,42,0.08), 0 1px 4px rgba(15,23,42,0.04);
  --shadow-lg: 0 16px 48px rgba(15,23,42,0.10), 0 4px 16px rgba(15,23,42,0.06);

  /* Layout */
  --max-width:    1280px;
  --gutter:       24px;
  --nav-height:   72px;

  /* Transitions */
  --transition-fast:    150ms ease;
  --transition-base:    250ms ease;
  --transition-slow:    400ms ease;
}

/* ------------------------------------------------------------
   2. RESET & BASE
   ------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* Focus visible — accessibility */
:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ------------------------------------------------------------
   3. LAYOUT UTILITIES
   ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--s-3);
}

@media (min-width: 1024px) {
  .container { padding-inline: var(--s-6); }
}

/* ------------------------------------------------------------
   4. TYPOGRAPHY UTILITIES
   ------------------------------------------------------------ */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-blue);
  background: var(--color-blue-light);
  border: 1px solid var(--color-blue-mid);
  padding: 6px 12px;
  border-radius: var(--border-radius-full);
  margin-bottom: var(--s-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--s-3);
}

.section-description {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: var(--s-8);
}

.text-accent { color: var(--color-blue); }

/* ------------------------------------------------------------
   5. BUTTONS
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  padding: 12px 24px;
  border-radius: var(--border-radius-full);
  border: 1.5px solid transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

.btn--lg {
  font-size: var(--text-base);
  padding: 14px 28px;
}

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

/* Primary */
.btn--primary {
  background: var(--color-blue);
  color: #FFFFFF;
  border-color: var(--color-blue);
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-blue-dark);
  border-color: var(--color-blue-dark);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.30);
  transform: translateY(-1px);
}
.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

/* Ghost (on light) */
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-blue);
  color: var(--color-blue);
}

/* White (on dark background) */
.btn--white {
  background: #FFFFFF;
  color: var(--color-text);
  border-color: #FFFFFF;
}
.btn--white:hover,
.btn--white:focus-visible {
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.20);
  transform: translateY(-1px);
}

/* Ghost White (on dark background) */
.btn--ghost-white {
  background: transparent;
  color: rgba(255, 255, 255, 0.80);
  border-color: rgba(255, 255, 255, 0.25);
}
.btn--ghost-white:hover,
.btn--ghost-white:focus-visible {
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.60);
}

/* ------------------------------------------------------------
   6. NAVIGATION
   ------------------------------------------------------------ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);

  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);

  transition: background var(--transition-slow),
  box-shadow var(--transition-slow),
  border-color var(--transition-slow);
}

.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-mark {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav__logo-text strong {
  font-weight: 800;
  color: var(--color-blue);
}

.nav__link.active {
    color: #2563eb;
    font-weight: 600;
}

.nav__link.active::after {
    width: 100%;
}

/* Links */
.nav__links {
  display: none;
  align-items: center;
  gap: var(--s-5);
}

@media (min-width: 1024px) {
  .nav__links { display: flex; }
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-blue);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link:focus-visible::after {
  width: 100%;
}

/* CTA */
.nav__cta {
  display: none;
}

@media (min-width: 1024px) {
  .nav__cta { display: inline-flex; }
}

/* Toggle */
.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--border-radius-sm);
  transition: background var(--transition-fast);
}

.nav__toggle:hover { background: var(--color-bg-alt); }

@media (min-width: 1024px) {
  .nav__toggle { display: none; }
}

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav__toggle.open .nav__toggle-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__toggle.open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__toggle.open .nav__toggle-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Menu */
.nav__mobile {
  display: none;
  flex-direction: column;
  gap: var(--s-1);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: var(--border);
  padding: var(--s-3) var(--s-3) var(--s-5);
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  box-shadow: var(--shadow-lg);
}

.nav__mobile.open {
  display: flex;
  animation: slideDown 0.25s ease;
}

.nav__mobile-link {
  display: block;
  padding: 10px 12px;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.nav__mobile-link:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.nav__mobile-cta {
  margin-top: var(--s-2);
  align-self: flex-start;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ------------------------------------------------------------
   7. HERO
   ------------------------------------------------------------ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + var(--s-8));
  padding-bottom: var(--s-12);
  overflow: hidden;
  background: var(--color-bg);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-10);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-8);
  }
}

/* Content */
.hero__content { max-width: 560px; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-blue);
  background: var(--color-blue-light);
  border: 1px solid var(--color-blue-mid);
  padding: 6px 14px;
  border-radius: var(--border-radius-full);
  margin-bottom: var(--s-4);
}

.hero__badge-dot {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-blue);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-4xl), 7vw, var(--text-5xl));
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--s-4);
}

.hero__title-accent { color: var(--color-blue); }

.hero__description {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--s-5);
  max-width: 480px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-bottom: var(--s-8);
}

/* Stats */
.hero__stats {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s-3);
}

.hero__stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero__stat-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.hero__stat-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.hero__stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
  flex-shrink: 0;
}

/* Visual */
.hero__visual {
  position: relative;
  height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__visual-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 50%,
    var(--color-blue-light) 0%,
    var(--color-bg) 70%);
  border-radius: 50%;
}

.hero__visual-center {
  position: relative;
  z-index: 2;
  width: 160px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #FFFFFF;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--color-border);
}

.hero__visual-logo {
  width: 100px;
  height: 100px;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(37, 99, 235, 0.15));
}

/* Floating cards */
.hero__card {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  background: #FFFFFF;
  border: var(--border);
  border-radius: var(--border-radius-lg);
  padding: 12px 16px;
  box-shadow: var(--shadow-md);
  white-space: nowrap;
}

.hero__card-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-blue-light);
  border-radius: var(--border-radius-sm);
  flex-shrink: 0;
}

.hero__card-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.hero__card--tl  { top: 12%;  left: 2%; }
.hero__card--tr  { top: 12%;  right: 2%; }
.hero__card--bl  { bottom: 20%; left: 2%; }
.hero__card--br  { bottom: 20%; right: 2%; }
.hero__card--top { top: 2%;   left: 50%; transform: translateX(-50%); }

/* Decorative */
.hero__decor { position: absolute; inset: 0; pointer-events: none; z-index: 0; }

.hero__decor-circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.04;
}

.hero__decor-circle--1 {
  width: 600px;
  height: 600px;
  background: var(--color-blue);
  top: -200px;
  right: -150px;
}

.hero__decor-circle--2 {
  width: 400px;
  height: 400px;
  background: var(--color-blue);
  bottom: -100px;
  left: -100px;
}

/* Floating animation */
.hero-float {
  animation: heroFloat 4s ease-in-out infinite;
}

.float-delay-1 { animation: heroFloat 4s ease-in-out 0.0s infinite; }
.float-delay-2 { animation: heroFloat 4s ease-in-out 0.5s infinite; }
.float-delay-3 { animation: heroFloat 4s ease-in-out 1.0s infinite; }
.float-delay-4 { animation: heroFloat 4s ease-in-out 1.5s infinite; }

@keyframes heroFloat {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-8px); }
}

.hero__card--top.float-delay-2 {
  animation: heroFloatTop 4s ease-in-out 0.5s infinite;
}

@keyframes heroFloatTop {
  0%, 100% { transform: translateX(-50%) translateY(0px); }
  50%       { transform: translateX(-50%) translateY(-8px); }
}

/* ------------------------------------------------------------
   8. WHY SECTION
   ------------------------------------------------------------ */
.why {
  padding: var(--s-8) 0 var(--s-10);
  background: var(--color-bg);
  text-align: center;
}

.why .section-description {
  margin-inline: auto;
  margin-bottom: var(--s-8);
}

.why__pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  max-width: 960px;
  margin-inline: auto;
}

@media (min-width: 768px) {
  .why__pillars { grid-template-columns: repeat(3, 1fr); }
}

.why__pillar {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--s-5) var(--s-4);
  background: var(--color-bg-alt);
  border: var(--border);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
}

.why__pillar:hover {
  background: #FFFFFF;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.why__pillar-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-blue-light);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--s-3);
}

.why__pillar-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--s-1);
}

.why__pillar-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ------------------------------------------------------------
   9. SERVICES
   ------------------------------------------------------------ */
.services {
  padding: var(--s-8) 0 var(--s-10);
  background: var(--color-bg-alt);
  text-align: center;
}

.services .section-description {
  margin-inline: auto;
  margin-bottom: var(--s-8);
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-3);
}

@media (min-width: 768px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .services__grid { grid-template-columns: repeat(4, 1fr); }
}

.service-card {
  background: #FFFFFF;
  border: var(--border);
  border-radius: var(--border-radius-lg);
  padding: var(--s-4);
  transition: all var(--transition-base);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.service-card:hover,
.service-card:focus-within {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-blue-mid);
}

.service-card:hover::before,
.service-card:focus-within::before {
  transform: scaleX(1);
}

.service-card__icon {
  width: 56px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-blue-light);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--s-3);
}

.service-card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--s-2);
}

.service-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--s-3);
}

.service-card__features {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--s-4);
}

.service-card__features li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: 16px;
  position: relative;
}

.service-card__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-blue-mid);
}

.service-card__arrow {
  display: flex;
  align-items: center;
  color: var(--color-blue);
  opacity: 0;
  transform: translateX(-4px);
  transition: all var(--transition-base);
}

.service-card:hover .service-card__arrow,
.service-card:focus-within .service-card__arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ------------------------------------------------------------
   10. PROCESS
   ------------------------------------------------------------ */
.process {
  padding: var(--s-12) 0;
  background: var(--color-bg);
}

.process .section-title,
.process .section-label { text-align: center; }
.process .section-label {
  display: block;
  text-align: center;
  margin-bottom: var(--s-3);
}

.process__timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  align-items: center;
  max-width: 1000px;
  margin-inline: auto;
  margin-top: var(--s-8);
}

@media (min-width: 768px) {
  .process__timeline {
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    gap: 0;
  }
}

.process__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--s-4) var(--s-3);
  background: var(--color-bg-alt);
  border: var(--border);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
  position: relative;
}

.process__step:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  background: #FFFFFF;
}

.process__step-number {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--color-blue);
  background: var(--color-blue-light);
  border: 1px solid var(--color-blue-mid);
  padding: 3px 10px;
  border-radius: var(--border-radius-full);
}

.process__step-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-blue-light);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--s-2);
}

.process__step-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--s-1);
}

.process__step-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.process__connector {
  display: none;
}

@media (min-width: 768px) {
  .process__connector {
    display: block;
    width: 32px;
    height: 1.5px;
    background: var(--color-border);
    flex-shrink: 0;
    position: relative;
  }

  .process__connector::after {
    content: '';
    position: absolute;
    right: -4px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-blue);
  }
}

/* ------------------------------------------------------------
   11. PROJECTS
   ------------------------------------------------------------ */
.projects {
  padding: var(--s-12) 0;
  background: var(--color-bg-alt);
}

.projects__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
}

@media (min-width: 768px) {
  .projects__grid { grid-template-columns: repeat(3, 1fr); }
}

.project-card {
  background: #FFFFFF;
  border: var(--border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: default;
}

.project-card:hover,
.project-card:focus-within {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.project-card__visual {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.project-card__visual--blue {
  background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
}

.project-card__visual--dark {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
}

.project-card__visual--mid {
  background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 100%);
}

.project-card__placeholder-icon {
  opacity: 0.6;
}

.project-card__content {
  padding: var(--s-4);
}

.project-card__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-blue);
  background: var(--color-blue-light);
  border: 1px solid var(--color-blue-mid);
  padding: 4px 10px;
  border-radius: var(--border-radius-full);
  margin-bottom: var(--s-2);
}

.project-card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--s-1);
}

.project-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--s-3);
}

.project-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.project-card__tech {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border: var(--border);
  padding: 4px 10px;
  border-radius: var(--border-radius-full);
}

/* ------------------------------------------------------------
   12. TECH STACK
   ------------------------------------------------------------ */
.tech-stack {
  padding: var(--s-12) 0;
  background: var(--color-bg);
  text-align: center;
}

.tech-stack .section-label {
  display: block;
  text-align: center;
  margin-bottom: var(--s-3);
}

.tech-stack .section-title {
  margin-inline: auto;
}

.tech-stack__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--s-2);
  margin-top: var(--s-8);
}

.tech-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  background: #FFFFFF;
  border: var(--border);
  border-radius: var(--border-radius-lg);
  padding: var(--s-4) var(--s-5);
  min-width: 110px;
  transition: all var(--transition-base);
  cursor: default;
}

.tech-card:hover,
.tech-card:focus-visible {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-blue-mid);
}

.tech-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-card__name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

/* ------------------------------------------------------------
   13. WHY US
   ------------------------------------------------------------ */
.why-us {
  padding: var(--s-12) 0;
  background: var(--color-bg-alt);
}

.why-us__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-8);
}

@media (min-width: 1024px) {
  .why-us__inner { grid-template-columns: 1fr 1fr; align-items: start; }
}

.why-us__content .section-description {
  margin-bottom: 0;
}

.why-us__points {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

.why-us__point {
  display: flex;
  gap: var(--s-3);
  align-items: flex-start;
}

.why-us__point-check {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-blue-light);
  border-radius: 50%;
  flex-shrink: 0;
}

.why-us__point-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.why-us__point-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ------------------------------------------------------------
   14. CTA SECTION
   ------------------------------------------------------------ */
.cta {
  padding: var(--s-8) 0;
  background: var(--color-bg-dark);
  text-align: center;
}

.cta__inner {
  max-width: 640px;
  margin-inline: auto;
}

.cta__label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--s-3);
}

.cta__title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 5vw, 48px);
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--s-3);
}

.cta__text {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  margin-bottom: var(--s-6);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--s-2);
}

/* ------------------------------------------------------------
   15. CONTACT
   ------------------------------------------------------------ */
.contact {
  padding: var(--s-12) 0;
  background: var(--color-bg);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-8);
}

@media (min-width: 1024px) {
  .contact__inner { grid-template-columns: 1fr 1fr; align-items: start; }
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  margin-top: var(--s-2);
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 12px;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.contact__detail:hover,
.contact__detail:focus-visible {
  background: var(--color-blue-light);
  color: var(--color-blue);
}

.contact__detail-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-blue-light);
  border-radius: var(--border-radius-md);
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.contact__detail:hover .contact__detail-icon {
  background: var(--color-blue-mid);
}

/* Form */
.contact__form {
  background: var(--color-bg-alt);
  border: var(--border);
  border-radius: var(--border-radius-xl);
  padding: var(--s-5);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-size: var(--text-base);
  color: var(--color-text);
  background: #FFFFFF;
  border: var(--border);
  border-radius: var(--border-radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder { color: var(--color-text-muted); opacity: 0.7; }

.form-input:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.10);
}

.form-input:invalid:not(:focus):not(:placeholder-shown) {
  border-color: #EF4444;
}

.form-select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748B' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; padding-right: 40px; cursor: pointer; }

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

.form-note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  min-height: 20px;
}

.form-note.success { color: #16A34A; }
.form-note.error   { color: #EF4444; }

/* ------------------------------------------------------------
   16. FOOTER
   ------------------------------------------------------------ */
.footer {
  background: var(--color-bg-dark);
  padding-top: var(--s-10);
  padding-bottom: var(--s-5);
}

.footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-8);
  padding-bottom: var(--s-8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 1024px) {
  .footer__top {
    grid-template-columns: 1fr 1.5fr;
    align-items: start;
  }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.contact__detail-icon i{
    font-size:22px;
    color:#2563EB;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.footer__logo-mark {
  width: 40px;
  height: 40px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.footer__logo-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer__logo-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #FFFFFF;
}

.footer__logo-tagline {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
}

.footer__brand-text {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.50);
  line-height: 1.7;
  max-width: 300px;
}

.footer__social {
  display: flex;
  gap: var(--s-1);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.footer__social-link:hover,
.footer__social-link:focus-visible {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.20);
}

/* Footer Nav */
.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}

@media (max-width: 480px) {
  .footer__nav { grid-template-columns: 1fr 1fr; }
}

.footer__nav-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.80);
  margin-bottom: var(--s-2);
  letter-spacing: 0.02em;
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__nav-link {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__nav-link:hover,
.footer__nav-link:focus-visible {
  color: rgba(255, 255, 255, 0.85);
}

/* Footer Bottom */
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-2);
  padding-top: var(--s-4);
}

.footer__copy {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.30);
}

.footer__tagline {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.25);
}

/* ------------------------------------------------------------
   17. SCROLL REVEAL ANIMATIONS
   ------------------------------------------------------------ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.contact-divider {
    width: 90px;
    margin: 16px auto 24px;
    border: 0;
    height: 3px;
    background: #2563EB; /* change color if needed */
    border-radius: 10px;
}

/* Stagger children */
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal:nth-child(5) { transition-delay: 0.4s; }

/* ------------------------------------------------------------
   18. RESPONSIVE OVERRIDES
   ------------------------------------------------------------ */
@media (max-width: 480px) {
  .hero { padding-top: calc(var(--nav-height) + var(--s-5)); }
  .hero__visual { height: 320px; }
  .hero__card { padding: 8px 12px; font-size: 11px; }
  .hero__card-icon { width: 28px; height: 28px; }
  .hero__stats { gap: var(--s-2); }
  .hero__stat-divider { height: 32px; }

  .why__pillars { gap: var(--s-3); }
  .services__grid { gap: var(--s-2); }
  .projects__grid { gap: var(--s-3); }

  .contact__form { padding: var(--s-3); }
  .footer__nav { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --gutter: 20px; }
  .section-title { font-size: clamp(var(--text-2xl), 5vw, var(--text-3xl)); }
  .process__timeline { gap: var(--s-6); }
  .cta__actions { flex-direction: column; align-items: center; }
  .cta__actions .btn { width: 100%; max-width: 320px; }
}

/* Print */
@media print {
  .nav, .cta, .contact__form, .footer__social { display: none; }
  .hero { min-height: auto; padding-top: var(--s-8); }
}