/* ============================================================
   AIVOIN WEBSITE — Main Stylesheet
   Design: Light, clean & minimal with premium polish
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Colors */
  --color-bg:          #ffffff;
  --color-bg-subtle:   #f8f9fc;
  --color-bg-accent:   #f0f4ff;
  --color-border:      #e5e9f2;
  --color-border-soft: #eef0f7;

  --color-text-primary:   #0d1117;
  --color-text-secondary: #4b5563;
  --color-text-muted:     #9ca3af;

  --color-brand:       #4f80ff;
  --color-brand-dark:  #3060e0;
  --color-brand-light: #eef2ff;

  --color-purple: #7c3aed;
  --color-teal:   #0ea5e9;
  --color-green:  #10b981;
  --color-amber:  #f59e0b;

  /* Typography */
  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Manrope', 'Inter', system-ui, sans-serif;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Sizing */
  --container-max: 1200px;
  --radius-sm:  0.375rem;
  --radius-md:  0.75rem;
  --radius-lg:  1rem;
  --radius-xl:  1.5rem;
  --radius-2xl: 2rem;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg:  0 10px 40px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.04);
  --shadow-brand: 0 8px 30px rgba(79,128,255,.25);

  /* Transitions */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; }

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

ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* --- Typography Utilities --- */
.text-gradient {
  background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-24);
}

/* --- Scroll-Driven Reveal Animations --- */
@keyframes reveal-fade-up {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes reveal-fade-left {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes reveal-fade-right {
  from { opacity: 0; transform: translateX(32px); }
  to   { opacity: 1; transform: translateX(0); }
}

.reveal-up, .reveal-left, .reveal-right {
  opacity: 0;
  animation-fill-mode: both;
  animation-duration: 0.7s;
  animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal-up.in-view    { animation-name: reveal-fade-up; }
.reveal-left.in-view  { animation-name: reveal-fade-left; }
.reveal-right.in-view { animation-name: reveal-fade-right; }

/* Stagger children in a group */
.services-grid .reveal-up:nth-child(2) { animation-delay: 0.08s; }
.services-grid .reveal-up:nth-child(3) { animation-delay: 0.16s; }
.services-grid .reveal-up:nth-child(4) { animation-delay: 0.24s; }
.services-grid .reveal-up:nth-child(5) { animation-delay: 0.32s; }
.services-grid .reveal-up:nth-child(6) { animation-delay: 0.40s; }
.testimonials-grid .reveal-up:nth-child(2) { animation-delay: 0.1s; }
.testimonials-grid .reveal-up:nth-child(3) { animation-delay: 0.2s; }
.portfolio-grid .reveal-up:nth-child(2) { animation-delay: 0.1s; }
.portfolio-grid .reveal-up:nth-child(3) { animation-delay: 0.2s; }
.portfolio-grid .reveal-up:nth-child(4) { animation-delay: 0.3s; }
.blog-grid .reveal-up:nth-child(2) { animation-delay: 0.1s; }
.blog-grid .reveal-up:nth-child(3) { animation-delay: 0.2s; }

/* ===================================================
   HEADER / NAV
=================================================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
}
.site-header.scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-4) var(--space-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.nav-logo:hover { opacity: 0.85; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.nav-link:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-subtle);
}

.nav-cta-link {
  background: var(--color-brand);
  color: #fff !important;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: 600;
}
.nav-cta-link:hover {
  background: var(--color-brand-dark) !important;
}

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}
.hamburger-bar {
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

/* ===================================================
   BUTTONS
=================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast),
              border-color var(--transition-fast), transform var(--transition-fast),
              box-shadow var(--transition-fast);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-brand);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover {
  background: var(--color-brand-dark);
  box-shadow: 0 12px 40px rgba(79,128,255,.35);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text-primary);
  border-color: var(--color-brand);
}

.btn-outline {
  background: transparent;
  color: var(--color-brand);
  border-color: var(--color-brand);
}
.btn-outline:hover {
  background: var(--color-brand);
  color: #fff;
  box-shadow: var(--shadow-brand);
}

/* ===================================================
   SECTION HEADER (shared)
=================================================== */
.section-header {
  text-align: center;
  max-width: 700px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-brand);
  background: var(--color-brand-light);
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.section-sub {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin-inline: auto;
}

.section-cta { text-align: center; margin-top: var(--space-12); }

/* ===================================================
   HERO SECTION
=================================================== */
.hero-section {
  padding-top: calc(80px + var(--space-20));
  padding-bottom: 0;
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  padding-bottom: var(--space-16);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: var(--space-6);
}
.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.85); }
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: var(--space-6);
  color: var(--color-text-primary);
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.stat-item { display: flex; flex-direction: column; }
.stat-number {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
}
.stat-label { font-size: 0.8rem; color: var(--color-text-muted); font-weight: 500; }
.stat-divider {
  width: 1px; height: 2.5rem;
  background: var(--color-border);
}

/* Hero visual */
.hero-visual {
  position: relative;
  height: 520px;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.35;
  pointer-events: none;
}
.hero-blob-1 {
  width: 340px; height: 340px;
  background: radial-gradient(circle, #c7d7ff, #e0d7ff);
  top: -40px; right: -60px;
}
.hero-blob-2 {
  width: 220px; height: 220px;
  background: radial-gradient(circle, #d7f5e9, #c7edff);
  bottom: 40px; left: 20px;
}

/* Floating cards */
.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-md);
  font-size: 0.875rem;
  z-index: 2;
  white-space: nowrap;
}
.floating-card strong { display: block; font-weight: 700; font-size: 0.875rem; }
.floating-card span   { color: var(--color-text-muted); font-size: 0.775rem; }
.card-icon { font-size: 1.5rem; }

.card-1 { top: 30px; left: 0; animation: float1 6s ease-in-out infinite; }
.card-2 { top: 160px; right: 20px; animation: float2 7s ease-in-out infinite; }
.card-3 { bottom: 120px; left: 30px; animation: float3 5.5s ease-in-out infinite; }

@keyframes float1 {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}
@keyframes float2 {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(10px); }
}
@keyframes float3 {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

/* Code block */
.hero-code-block {
  position: absolute;
  right: 0; bottom: 0;
  width: 310px;
  background: #0d1117;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid #30363d;
  z-index: 2;
}
.code-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.6rem 0.9rem;
  background: #161b22;
  border-bottom: 1px solid #30363d;
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red    { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green  { background: #28c840; }
.code-filename { font-size: 0.75rem; color: #8b949e; margin-left: auto; font-family: monospace; }
.code-body {
  padding: var(--space-4) var(--space-4);
  font-family: 'Fira Code', 'Fira Mono', 'Cascadia Code', monospace;
  font-size: 0.78rem;
  line-height: 1.8;
  color: #e6edf3;
  white-space: pre;
  overflow: hidden;
}
.code-keyword { color: #ff7b72; }
.code-fn      { color: #d2a8ff; }
.code-op      { color: #79c0ff; }
.code-tag     { color: #7ee787; }
.code-attr    { color: #79c0ff; }
.code-str     { color: #a5d6ff; }

/* Ticker */
.ticker-wrapper {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-subtle);
  overflow: hidden;
  padding-block: var(--space-3);
  margin-top: var(--space-4);
}
.ticker-track {
  display: flex;
  gap: var(--space-6);
  width: max-content;
  animation: ticker-scroll 30s linear infinite;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}
.ticker-sep { color: var(--color-border); }
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.ticker-wrapper:hover .ticker-track { animation-play-state: paused; }

/* ===================================================
   SERVICES SECTION
=================================================== */
.services-section { background: var(--color-bg); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-brand);
}
.service-card--featured {
  background: linear-gradient(145deg, #f0f4ff, #faf5ff);
  border-color: rgba(79,128,255,0.3);
}

.service-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px; height: 56px;
  border-radius: var(--radius-lg);
  background: var(--icon-bg, var(--color-brand-light));
  color: var(--icon-color, var(--color-brand));
  margin-bottom: var(--space-5);
}

.featured-badge {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--color-brand);
  color: #fff;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.service-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}

.service-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.service-tags li {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

/* ===================================================
   PROCESS SECTION
=================================================== */
.process-section { background: var(--color-bg-subtle); }

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  counter-reset: process-counter;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 20px);
  right: calc(12.5% + 20px);
  height: 2px;
  background: linear-gradient(90deg, var(--color-brand), var(--color-purple));
  opacity: 0.2;
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-brand), var(--color-purple));
  color: #fff;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(79,128,255,.3);
  position: relative;
  z-index: 1;
}

.step-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}
.step-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===================================================
   PORTFOLIO SECTION
=================================================== */
.portfolio-section { background: var(--color-bg); }

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto;
  gap: var(--space-6);
}
.portfolio-card--large { grid-column: 1 / -1; }

.portfolio-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-bg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.portfolio-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.portfolio-image {
  height: 220px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.portfolio-card--large .portfolio-image { height: 280px; }

/* Mock UI inside portfolio cards */
.portfolio-img-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mock-ui {
  width: 200px;
  background: rgba(255,255,255,0.15);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mock-bar   { height: 8px; background: rgba(255,255,255,0.6); border-radius: 4px; }
.mock-card  { height: 60px; background: rgba(255,255,255,0.3); border-radius: 8px; }
.mock-row   { height: 8px; background: rgba(255,255,255,0.4); border-radius: 4px; }
.mock-row.short { width: 60%; }
.mock-chart { height: 50px; background: rgba(255,255,255,0.25); border-radius: 8px; }
.mock-pill  { height: 24px; width: 80px; background: rgba(255,255,255,0.5); border-radius: 99px; }
.mock-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mock-grid-2::before, .mock-grid-2::after {
  content: '';
  height: 50px;
  background: rgba(255,255,255,0.3);
  border-radius: 6px;
}

.portfolio-info { padding: var(--space-6); }

.portfolio-tags {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-brand);
  background: var(--color-brand-light);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.portfolio-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}
.portfolio-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}
.portfolio-metrics {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: var(--space-4);
}
.portfolio-metrics strong { color: var(--color-text-primary); font-weight: 700; }

/* Portfolio image badge (e.g. 'View on pub.dev' or 'In Development') */
.portfolio-img-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  color: #fff;
  letter-spacing: 0.04em;
  border: 1px solid rgba(255,255,255,0.3);
}
.portfolio-img-badge--link {
  text-decoration: none;
  transition: background var(--transition-fast);
  cursor: pointer;
}
.portfolio-img-badge--link:hover {
  background: rgba(255,255,255,0.35);
}

/* Portfolio highlights (feature bullet list) */
.portfolio-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-block: var(--space-5);
  padding: var(--space-5);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-soft);
}
.highlight-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.highlight-icon { font-size: 1rem; flex-shrink: 0; }

/* pub.dev link */
.portfolio-pubdev-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-brand);
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--color-brand-light);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.portfolio-pubdev-link:hover {
  background: var(--color-brand);
  color: #fff;
}

/* Portfolio tabs */
.portfolio-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0;
}
.portfolio-tab {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border: 2px solid transparent;
  border-bottom: none;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  position: relative;
  bottom: -2px;
}
.portfolio-tab:hover { color: var(--color-text-primary); background: var(--color-bg-subtle); }
.portfolio-tab.active {
  color: var(--color-brand);
  background: var(--color-bg);
  border-color: var(--color-border) var(--color-border) var(--color-bg);
}

.portfolio-panel { display: none; }
.portfolio-panel.active { display: block; }

/* Prior work note */
.prior-work-note {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-brand);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-top: var(--space-8);
}
.prior-work-icon { font-size: 2rem; flex-shrink: 0; margin-top: 2px; }
.prior-work-content strong { display: block; font-weight: 700; font-size: 1rem; margin-bottom: var(--space-2); }
.prior-work-content p { font-size: 0.875rem; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: var(--space-4); }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.85rem; }

/* Mock code lines in portfolio image */
.mock-code-lines {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 6px 0;
  font-family: 'Fira Code', monospace;
  font-size: 0.65rem;
  line-height: 1.6;
}
.mock-code-line { white-space: nowrap; overflow: hidden; }

/* Wizard steps mock */
.mock-wizard-steps {
  display: flex;
  gap: 6px;
  align-items: center;
  margin: 8px 0;
}
.wizard-step {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.5);
  font-size: 0.65rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.2);
}
.wizard-step.done { background: rgba(79,128,255,0.5); color: #fff; border-color: rgba(79,128,255,0.7); }
.wizard-step.active { background: var(--color-brand); color: #fff; border-color: var(--color-brand); }

/* Live badge inside sdui card */
.sdui-live-badge {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(16,185,129,0.25);
  color: #6ee7b7;
  border: 1px solid rgba(16,185,129,0.4);
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  white-space: nowrap;
}

/* ===================================================
   TECH SECTION
=================================================== */
.tech-section { background: var(--color-bg-subtle); }

.tech-categories {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.tech-category {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.tech-cat-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.tech-logos { display: flex; flex-direction: column; gap: var(--space-3); }
.tech-logo-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.tech-logo-item:hover { background: var(--color-bg-subtle); }
.tech-emoji { font-size: 1.25rem; width: 28px; text-align: center; }

/* ===================================================
   TESTIMONIALS
=================================================== */
.testimonials-section { background: var(--color-bg); }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stars { color: #f59e0b; font-size: 1.1rem; letter-spacing: 2px; }

.testimonial-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  flex: 1;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.author-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-brand), var(--color-purple));
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.author-info strong { display: block; font-weight: 700; font-size: 0.9rem; }
.author-info span   { font-size: 0.8rem; color: var(--color-text-muted); }

/* ===================================================
   PRICING SECTION
=================================================== */
.pricing-section { background: var(--color-bg-subtle); }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.pricing-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pricing-card--featured {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 1px var(--color-brand), var(--shadow-md);
}

.plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-brand);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  white-space: nowrap;
}

.plan-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.price-from { font-size: 0.85rem; color: var(--color-text-muted); }
.price-amount {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--color-text-primary);
}

.plan-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.65;
}

.plan-features { display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-8); }
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}
.check {
  color: var(--color-green);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-btn { width: 100%; justify-content: center; }

/* ===================================================
   ABOUT SECTION
=================================================== */
.about-section { background: var(--color-bg); }

.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-content .section-label { display: inline-block; margin-bottom: var(--space-4); }
.about-content .section-title { text-align: left; margin-bottom: var(--space-5); }

.about-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-8);
}
.value-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}
.value-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.value-item strong { display: block; font-weight: 700; margin-bottom: var(--space-1); }
.value-item p { font-size: 0.875rem; color: var(--color-text-secondary); }

.about-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.about-stat-card {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.about-stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.about-stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--color-brand), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.about-stat-label { font-size: 0.875rem; color: var(--color-text-muted); font-weight: 500; }

/* ===================================================
   FAQ SECTION
=================================================== */
.faq-section { background: var(--color-bg-subtle); }

.faq-container { max-width: 780px; }

.faq-list { display: flex; flex-direction: column; gap: var(--space-3); }

.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item.open   { border-color: var(--color-brand); box-shadow: 0 0 0 1px rgba(79,128,255,0.15); }

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-5) var(--space-6);
  font-size: 0.975rem;
  font-weight: 600;
  color: var(--color-text-primary);
  text-align: left;
  gap: var(--space-4);
  transition: color var(--transition-fast);
}
.faq-question:hover { color: var(--color-brand); }

.faq-icon {
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: transform var(--transition-normal), color var(--transition-fast);
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--color-brand);
}

.faq-answer {
  padding: 0 var(--space-6) var(--space-5);
}
.faq-answer p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

/* ===================================================
   BLOG SECTION
=================================================== */
.blog-section { background: var(--color-bg); }

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.blog-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-bg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.blog-image {
  height: 180px;
}
.blog-image-1 { background: linear-gradient(135deg, #667eea, #764ba2); }
.blog-image-2 { background: linear-gradient(135deg, #0ea5e9, #3b82f6); }
.blog-image-3 { background: linear-gradient(135deg, #10b981, #0ea5e9); }

.blog-content { padding: var(--space-6); }

.blog-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.blog-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-brand);
  background: var(--color-brand-light);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}
.blog-date { font-size: 0.8rem; color: var(--color-text-muted); }

.blog-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: var(--space-3);
}
.blog-link { color: inherit; }
.blog-link:hover { color: var(--color-brand); }

.blog-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}
.blog-read-more {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-brand);
}
.blog-read-more:hover { text-decoration: underline; }

/* ===================================================
   CONTACT SECTION
=================================================== */
.contact-section { background: var(--color-bg-subtle); }

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info .section-label { display: inline-block; margin-bottom: var(--space-4); }
.contact-info .section-title { text-align: left; font-size: clamp(1.5rem, 3vw, 2.25rem); }

.contact-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.contact-details { display: flex; flex-direction: column; gap: var(--space-5); }
.contact-detail-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.contact-detail-icon {
  font-size: 1.5rem;
  width: 48px; height: 48px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-detail-item strong { display: block; font-weight: 700; font-size: 0.9rem; margin-bottom: 2px; }
.contact-detail-item span  { font-size: 0.875rem; color: var(--color-text-secondary); }

/* Form */
.contact-form-wrap {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-md);
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.form-group { display: flex; flex-direction: column; gap: var(--space-2); }
.form-group--full { grid-column: 1 / -1; }

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text-primary);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}
.form-input::placeholder { color: var(--color-text-muted); }
.form-input:focus {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px rgba(79,128,255,0.12);
}
.form-input:user-invalid {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239,68,68,.1);
}

.form-select { appearance: none; cursor: pointer; }
.form-textarea { resize: vertical; min-height: 120px; }

.form-submit {
  grid-column: 1 / -1;
  justify-content: center;
  padding: 0.9rem;
  font-size: 1rem;
  position: relative;
}

.form-privacy {
  grid-column: 1 / -1;
  font-size: 0.775rem;
  color: var(--color-text-muted);
  text-align: center;
}
.form-privacy a { color: var(--color-brand); text-decoration: underline; }

.form-success {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  font-size: 0.9rem;
  color: #065f46;
}
.success-icon {
  width: 28px; height: 28px;
  background: #10b981;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

/* ===================================================
   FOOTER
=================================================== */
.site-footer {
  background: var(--color-text-primary);
  color: rgba(255,255,255,0.7);
}

.footer-container {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-16);
  padding-block: var(--space-16);
}

.footer-logo .logo-text { color: #fff; }
.footer-tagline {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  max-width: 280px;
  margin-block: var(--space-4) var(--space-6);
  line-height: 1.7;
}

.footer-social { display: flex; gap: var(--space-3); }
.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.7);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.social-link:hover { background: var(--color-brand); color: #fff; }

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  padding-block: var(--space-16);
}
.footer-col-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-4);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition-fast);
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--space-5);
  font-size: 0.8rem;
}
.footer-legal { display: flex; gap: var(--space-5); }
.footer-legal a { color: rgba(255,255,255,0.5); }
.footer-legal a:hover { color: #fff; }

/* ===================================================
   RESPONSIVE — TABLET
=================================================== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-categories { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .process-steps::before { display: none; }
  .hero-container { gap: var(--space-10); }
  .hero-visual { height: 420px; }
  .hero-code-block { width: 260px; font-size: 0.7rem; }
}

/* ===================================================
   RESPONSIVE — MOBILE
=================================================== */
@media (max-width: 768px) {
  .section { padding-block: var(--space-16); }

  /* Nav */
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 85vw);
    height: 100dvh;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-20) var(--space-6) var(--space-8);
    box-shadow: var(--shadow-lg);
    transition: right var(--transition-normal);
    overflow-y: auto;
    z-index: 99;
  }
  .nav-links.open { right: 0; }
  .nav-link { padding: var(--space-4) var(--space-3); width: 100%; border-radius: 0; font-size: 1rem; }
  .nav-cta-link { margin-top: var(--space-4); border-radius: var(--radius-md); text-align: center; }

  /* Hero */
  .hero-section { padding-top: calc(70px + var(--space-10)); }
  .hero-container { grid-template-columns: 1fr; gap: var(--space-10); }
  .hero-visual { height: 360px; }
  .hero-stats { gap: var(--space-4); }
  .hero-code-block { right: 0; bottom: 0; width: 240px; font-size: 0.65rem; }

  /* Services */
  .services-grid { grid-template-columns: 1fr; }

  /* Process */
  .process-steps { grid-template-columns: 1fr; }

  /* Portfolio */
  .portfolio-grid { grid-template-columns: 1fr; }
  .portfolio-card--large { grid-column: auto; }

  /* Tech */
  .tech-categories { grid-template-columns: 1fr 1fr; }

  /* Testimonials */
  .testimonials-grid { grid-template-columns: 1fr; }

  /* Pricing */
  .pricing-grid { grid-template-columns: 1fr; }

  /* About */
  .about-container { grid-template-columns: 1fr; gap: var(--space-10); }
  .about-content .section-title { font-size: 1.75rem; }

  /* Contact */
  .contact-container { grid-template-columns: 1fr; gap: var(--space-10); }
  .contact-form { grid-template-columns: 1fr; }
  .form-group--full { grid-column: auto; }
  .form-submit { grid-column: auto; }
  .form-privacy { grid-column: auto; }
  .form-success { grid-column: auto; }
  .contact-form-wrap { padding: var(--space-6); }

  /* Blog */
  .blog-grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer-container { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-links { grid-template-columns: 1fr 1fr; padding-block: 0; }
  .footer-bottom-inner { flex-direction: column; gap: var(--space-3); text-align: center; }

  /* FAQ */
  .faq-container { padding-inline: 0; }

  /* Section title */
  .section-title { font-size: clamp(1.5rem, 5vw, 2rem); }
}

@media (max-width: 480px) {
  .tech-categories { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; }
  .footer-links { grid-template-columns: 1fr; }
  .hero-visual { height: 280px; }
  .card-2, .card-3 { display: none; }
  .about-stat-grid { grid-template-columns: 1fr 1fr; }
}

/* ===================================================
   FOCUS STYLES (Accessibility)
=================================================== */
:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ===================================================
   REDUCED MOTION
=================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ===================================================
   WHATSAPP FLOATING BUTTON
=================================================== */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: whatsapp-pulse 2s infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
}

@keyframes whatsapp-pulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4); }
  50% { box-shadow: 0 4px 24px rgba(37, 211, 102, 0.6), 0 0 0 8px rgba(37, 211, 102, 0.1); }
}

@media (max-width: 768px) {
  .whatsapp-float {
    bottom: 16px;
    right: 16px;
    width: 52px;
    height: 52px;
  }
}