/* ============================================================
   DESIGN SYSTEM — Harshavardhan Malve Portfolio
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors — Light Theme */
  --color-bg:           #f8f9fc;
  --color-bg-alt:       #ffffff;
  --color-surface:      #ffffff;
  --color-surface-alt:  #f0f2f8;
  --color-text:         #1a1a2e;
  --color-text-muted:   #6b7280;
  --color-text-subtle:  #9ca3af;
  --color-border:       #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-primary:      #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-glow: rgba(37, 99, 235, 0.15);
  --color-accent:       #7c3aed;
  --color-accent-glow:  rgba(124, 58, 237, 0.12);
  --color-gradient-1:   #2563eb;
  --color-gradient-2:   #7c3aed;
  --color-card-shadow:  rgba(0, 0, 0, 0.04);
  --color-card-hover:   rgba(0, 0, 0, 0.08);
  --color-overlay:      rgba(10, 10, 30, 0.75);
  --color-overlay-card: rgba(255, 255, 255, 0.75);
  --color-stars:        #f59e0b;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-xs:   0.75rem;
  --font-sm:   0.875rem;
  --font-base: 1rem;
  --font-md:   1.125rem;
  --font-lg:   1.25rem;
  --font-xl:   1.5rem;
  --font-2xl:  2.25rem;
  --font-3xl:  3rem;
  --font-4xl:  3.75rem;
  --font-5xl:  4.5rem;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  0.75rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;
  --space-4xl: 7rem;
  --space-5xl: 9rem;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-out);
  --transition-base: 0.35s var(--ease-out);
  --transition-slow: 0.6s var(--ease-out);

  /* Header */
  --header-height: 72px;
}

/* ---------- Dark Theme ---------- */
[data-theme="dark"] {
  --color-bg:           #1a1d2e;
  --color-bg-alt:       #1f2337;
  --color-surface:      #252a3e;
  --color-surface-alt:  #2d3348;
  --color-text:         #e8eaf0;
  --color-text-muted:   #a0a6be;
  --color-text-subtle:  #737a96;
  --color-border:       #353b52;
  --color-border-light: #2d3348;
  --color-primary:      #4f8ff7;
  --color-primary-dark: #3b82f6;
  --color-primary-glow: rgba(79, 143, 247, 0.18);
  --color-accent:       #9370f7;
  --color-accent-glow:  rgba(147, 112, 247, 0.14);
  --color-gradient-1:   #4f8ff7;
  --color-gradient-2:   #9370f7;
  --color-card-shadow:  rgba(0, 0, 0, 0.15);
  --color-card-hover:   rgba(0, 0, 0, 0.25);
  --color-overlay:      rgba(15, 18, 30, 0.82);
  --color-overlay-card: rgba(31, 35, 55, 0.82);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

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

ul { list-style: none; }

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

/* ---------- Utilities ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Scroll Animations ---------- */
.anim-fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.anim-fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.services-grid .service-card:nth-child(2) { transition-delay: 0.12s; }
.services-grid .service-card:nth-child(3) { transition-delay: 0.24s; }
.projects-grid .project-card:nth-child(2) { transition-delay: 0.1s; }
.projects-grid .project-card:nth-child(3) { transition-delay: 0.2s; }
.projects-grid .project-card:nth-child(4) { transition-delay: 0.15s; }
.projects-grid .project-card:nth-child(5) { transition-delay: 0.25s; }


/* ============================================================
   HEADER / NAV
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background var(--transition-fast), box-shadow var(--transition-fast), backdrop-filter var(--transition-fast);
}

.header.scrolled {
  background: var(--color-overlay-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 2px var(--color-card-shadow);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: var(--header-height);
}

.nav-brand {
  font-size: var(--font-xl);
  font-weight: 800;
  letter-spacing: -0.5px;
  text-decoration: none;
  color: var(--color-text);
}

.brand-accent {
  color: var(--color-primary);
  font-size: var(--font-2xl);
}

.nav-menu {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gradient-1), var(--color-gradient-2));
  border-radius: 2px;
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.icon-sun,
.icon-moon {
  position: absolute;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

[data-theme="light"] .icon-sun  { opacity: 0; transform: rotate(90deg) scale(0); }
[data-theme="light"] .icon-moon { opacity: 1; transform: rotate(0) scale(1); }
[data-theme="dark"]  .icon-sun  { opacity: 1; transform: rotate(0) scale(1); }
[data-theme="dark"]  .icon-moon { opacity: 0; transform: rotate(-90deg) scale(0); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-4xl);
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.6;
  pointer-events: auto; /* Allow mouse interaction for the 3D scene */
}

.hero-bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
}

.shape-1 {
  width: 500px;
  height: 500px;
  background: var(--color-primary);
  top: -10%;
  right: -5%;
  animation: float-slow 18s ease-in-out infinite alternate;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: var(--color-accent);
  bottom: -5%;
  left: -8%;
  animation: float-slow 22s ease-in-out infinite alternate-reverse;
}

.shape-3 {
  width: 250px;
  height: 250px;
  background: var(--color-primary);
  top: 50%;
  left: 50%;
  animation: float-slow 15s ease-in-out infinite alternate;
}

@keyframes float-slow {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -30px) scale(1.08); }
}

.hero-container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-full);
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-glow);
  border: 1px solid var(--color-primary);
  margin-bottom: var(--space-xl);
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.4; transform: scale(0.7); }
}

.hero-title {
  font-size: clamp(var(--font-3xl), 5.5vw, var(--font-5xl));
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -2px;
  margin-bottom: var(--space-lg);
}

.hero-subtitle {
  font-size: var(--font-md);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 600px;
  margin-bottom: var(--space-2xl);
}

.hero-ctas {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
  color: #fff;
  box-shadow: 0 4px 16px var(--color-primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--color-primary-glow);
  color: #fff;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

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

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.stat-number {
  display: block;
  font-size: var(--font-2xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

.stat-label {
  font-size: var(--font-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}


/* ============================================================
   SECTION COMMON
   ============================================================ */
.services,
.projects,
.testimonials,
.contact {
  padding: var(--space-5xl) 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-3xl);
}

.section-tag {
  display: inline-block;
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(var(--font-2xl), 4vw, var(--font-4xl));
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: var(--font-md);
  color: var(--color-text-muted);
  line-height: 1.7;
}


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

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

.service-card {
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gradient-1), var(--color-gradient-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px var(--color-card-shadow);
  border-color: var(--color-border);
}

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

/* 3D Service Icon */
.service-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  overflow: hidden;
  position: relative;
}

.service-3d-canvas {
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}

.service-card h3 {
  font-size: var(--font-lg);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.5px;
}

.service-card p {
  font-size: var(--font-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.service-tags span {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 500;
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-light);
}


/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.project-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border-light);
}

.project-card--large {
  grid-column: span 2;
  aspect-ratio: 21 / 9;
}

.project-image {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--space-xl);
  transition: transform 0.6s var(--ease-out);
}

.project-card:hover .project-image img {
  transform: scale(1.06);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: var(--color-overlay);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-2xl);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 10;
  /* Safari 3D fix */
  transform: translateZ(20px);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-meta {
  position: absolute;
  top: var(--space-xl);
  left: var(--space-xl);
  margin-bottom: 0;
  z-index: 20;
}

.project-category {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  color: #ffffff;
  background: var(--color-primary);
  border: none;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

.project-title {
  font-size: var(--font-xl);
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.5px;
}

.project-desc {
  font-size: var(--font-sm);
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  max-width: 480px;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-sm);
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  transition: gap var(--transition-fast);
}

.project-link:hover {
  gap: var(--space-sm);
  color: #fff;
}


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

/* Slider */
.testimonial-slider {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
}

.slider-viewport {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.testimonials-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-card {
  min-width: 100%;
  padding: var(--space-2xl) var(--space-3xl);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

.testimonial-stars {
  font-size: var(--font-md);
  color: var(--color-stars);
  margin-bottom: var(--space-lg);
  letter-spacing: 2px;
}

.testimonial-quote {
  font-size: var(--font-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
  font-style: italic;
  flex: 1;
  margin-bottom: var(--space-xl);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-gradient-1), var(--color-gradient-2));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-sm);
  font-weight: 700;
  flex-shrink: 0;
}

.author-info h4 {
  font-size: var(--font-sm);
  font-weight: 600;
  margin-bottom: 2px;
}

.author-info span {
  font-size: var(--font-xs);
  color: var(--color-text-subtle);
}

/* Slider Controls */
.slider-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.slider-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.slider-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

.slider-dots {
  display: flex;
  gap: 10px;
  align-items: center;
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
}

.slider-dot.active {
  background: var(--color-primary);
  transform: scale(1.3);
  box-shadow: 0 0 8px var(--color-primary-glow);
}

.slider-dot:hover:not(.active) {
  background: var(--color-text-subtle);
}



/* ============================================================
   CONTACT
   ============================================================ */
.contact, .projects, .testimonials {
  position: relative;
  overflow: hidden;
}

.contact-canvas, .section-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}
.relative-container {
  position: relative;
  z-index: 1;
}
.contact-wrapper {
  max-width: 680px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}

.contact-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-card h4 {
  font-size: var(--font-sm);
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-card p,
.contact-card a {
  font-size: var(--font-sm);
  color: var(--color-text-muted);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-links a {
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-primary);
}

.social-links a:hover {
  color: var(--color-accent);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-subtle);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-group textarea {
  resize: none;
  min-height: 120px;
}

/* Validation States */
.form-group input.invalid,
.form-group textarea.invalid {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
  animation: shake 0.4s ease;
}

.form-group input.valid,
.form-group textarea.valid {
  border-color: #10b981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.10);
}

.form-group input.invalid:focus,
.form-group textarea.invalid:focus {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.18);
}

.form-group input.valid:focus,
.form-group textarea.valid:focus {
  border-color: #10b981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-error {
  font-size: 0.78rem;
  color: #ef4444;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 5px;
  animation: slideDown 0.25s ease;
}

.form-error svg {
  flex-shrink: 0;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}


/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--space-3xl);
}

.footer-container {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-border-light);
}

.footer-brand p {
  font-size: var(--font-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  max-width: 280px;
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
}

.footer-links a {
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-socials {
  display: flex;
  gap: var(--space-md);
}

.footer-socials a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.footer-socials a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.footer-bottom {
  text-align: center;
  padding: var(--space-xl) 0;
}

.footer-bottom p {
  font-size: var(--font-xs);
  color: var(--color-text-subtle);
}


/* ============================================================
   MOBILE RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }



  .service-card:nth-child(3) {
    grid-column: span 2;
    max-width: 500px;
    justify-self: center;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    height: calc(100vh - var(--header-height));
    flex-direction: column;
    background: var(--color-bg);
    padding: var(--space-2xl);
    gap: var(--space-lg);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 999;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-link {
    font-size: var(--font-lg);
  }

  .hero-title {
    font-size: var(--font-3xl);
    letter-spacing: -1px;
  }

  .hero-subtitle {
    font-size: var(--font-base);
  }

  .hero-stats {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-lg);
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

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

  .service-card:nth-child(3) {
    grid-column: auto;
    max-width: none;
  }

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

  .project-card, .project-card--large {
    grid-column: auto;
    aspect-ratio: auto;
    min-height: 340px;
  }

  .project-overlay {
    opacity: 1;
    background: linear-gradient(0deg, rgba(10, 10, 10, 0.95) 10%, rgba(10, 10, 10, 0.2) 100%);
    padding: var(--space-lg);
  }

  .project-meta {
    top: var(--space-lg);
    left: var(--space-lg);
  }



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

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-container {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-2xl);
    padding-bottom: var(--space-3xl);
  }

  .footer-socials {
    margin-bottom: var(--space-md);
  }

  .footer-brand p {
    max-width: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .hero {
    padding-top: calc(var(--header-height) + var(--space-2xl));
  }

  .hero-title {
    font-size: var(--font-2xl);
  }

  .hero-ctas {
    flex-direction: column;
  }

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

  .services,
  .projects,
  .testimonials,
  .contact {
    padding: var(--space-3xl) 0;
  }
}

/* ============================================================
   FORM SUCCESS STATE
   ============================================================ */
.form-success {
  display: none;
  text-align: center;
  padding: var(--space-3xl);
}

.form-success.show {
  display: block;
}

.form-success svg {
  color: #10b981;
  margin-bottom: var(--space-lg);
}

.form-success h3 {
  font-size: var(--font-xl);
  margin-bottom: var(--space-sm);
}

.form-success p {
  color: var(--color-text-muted);
  font-size: var(--font-sm);
}

/* Hide form when success is shown */
.contact-form.hidden {
  display: none;
}

/* ============================================================
   PREFERS REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .anim-fade-up {
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   COOKIE CONSENT BANNER
   ============================================================ */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  max-width: 380px;
  background-color: var(--color-surface);
  color: var(--color-text);
  padding: 24px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(128, 128, 128, 0.15);
  font-family: inherit;
  z-index: 9999;
  
  /* Animation states for sliding/fading */
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
              visibility 0.4s;
}

.cookie-banner.cookie-hidden {
  opacity: 0;
  transform: translateY(20px);
  visibility: hidden;
  pointer-events: none;
}

.cookie-content h3 {
  margin: 0 0 8px 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.cookie-content p {
  margin: 0 0 20px 0;
  font-size: 0.9rem;
  line-height: 1.5;
  opacity: 0.85;
}

.cookie-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.cookie-btn {
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.cookie-primary {
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: 1px solid var(--color-primary);
}

.cookie-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.cookie-ghost {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid currentColor;
  opacity: 0.7;
}

.cookie-ghost:hover {
  opacity: 1;
  background-color: rgba(128, 128, 128, 0.08);
}

@media (max-width: 480px) {
  .cookie-banner {
    bottom: 16px;
    left: 16px;
    right: 16px;
    max-width: calc(100% - 32px);
  }
}