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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* === Header === */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg-header);
  backdrop-filter: var(--header-blur);
  -webkit-backdrop-filter: var(--header-blur);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-default);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5%;
  height: var(--header-height);
}

.header-logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 36px;
  width: auto;
}

.nav-desktop {
  display: none;
  gap: 32px;
}

.nav-link {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-secondary);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  transition: var(--transition-default);
  position: relative;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-accent-light);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-gradient);
  transition: var(--transition-default);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Language Toggle */
.lang-toggle {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: 6px 12px;
  border-radius: var(--cta-radius);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: var(--transition-default);
}

.lang-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-light);
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

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

.hamburger:hover span {
  background: var(--color-accent-light);
}

/* Hamburger active state */
body.nav-open .hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

body.nav-open .hamburger span:nth-child(2) {
  opacity: 0;
}

body.nav-open .hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.nav-mobile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding: 40px 5%;
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding-top: 0;
  padding-bottom: 0;
}

body.nav-open .nav-mobile {
  max-height: 300px;
  padding-top: 40px;
  padding-bottom: 40px;
}

.nav-mobile .nav-link {
  font-size: 1.2rem;
}

/* === Hero === */
.hero {
  min-height: 100vh;
  background: var(--color-bg-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 5%;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: var(--color-accent-glow);
  filter: blur(120px);
  top: -100px;
  right: -100px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-logo {
  max-width: 350px;
  margin: 0 auto 40px;
}

.hero h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-extrabold);
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: var(--font-size-subtitle);
  color: var(--color-text-muted);
  margin-bottom: 40px;
}

/* === CTA Button === */
.cta {
  display: inline-block;
  background: var(--color-accent-gradient);
  padding: var(--cta-padding);
  border-radius: var(--cta-radius);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-base);
  transition: var(--transition-default);
}

.cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px var(--color-accent-glow);
}

/* === Sections === */
.section {
  padding: var(--section-padding-y) var(--section-padding-x);
}

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

.section-light {
  background: var(--color-bg-section-light);
}

.section-content {
  max-width: 1200px;
  margin: 0 auto;
}

.section h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  margin-bottom: 25px;
  color: var(--color-text-primary);
}

.section-subtitle {
  font-size: var(--font-size-subtitle);
  color: var(--color-text-muted);
  margin-bottom: 50px;
}

/* === About === */
.about-text {
  max-width: 800px;
}

.about-text p {
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

/* === Cards Grid === */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-cards);
  margin-top: 50px;
}

.card {
  background: var(--color-card-bg);
  border: var(--card-border);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  backdrop-filter: var(--card-blur);
  -webkit-backdrop-filter: var(--card-blur);
  transition: var(--transition-default);
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
}

.card-highlighted {
  border-color: var(--color-accent);
  background: linear-gradient(180deg, rgba(255, 0, 93, 0.08), var(--color-card-bg));
}

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--color-accent-light);
}

.card-icon svg {
  width: 100%;
  height: 100%;
}

.card h3 {
  font-size: var(--font-size-h3);
  margin-bottom: 15px;
  color: var(--color-accent-hover);
}

.card p {
  color: var(--color-text-secondary);
}

/* === Skills Grid === */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-cards);
  margin-top: 50px;
}

.skill-item {
  text-align: center;
  padding: 30px 20px;
  border-radius: var(--card-radius);
  background: var(--color-card-bg);
  border: var(--card-border);
  transition: var(--transition-default);
}

.skill-item:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.skill-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 15px;
  opacity: 0.9;
}

.skill-item h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--color-text-primary);
}

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

/* === Contact Grid === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 30px;
}

.contact-location {
  font-size: 1.1rem;
  color: var(--color-accent-light);
  font-weight: var(--font-weight-bold);
  margin-top: 10px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 30px 20px;
  border-radius: var(--card-radius);
  background: var(--color-card-bg);
  border: var(--card-border);
  transition: var(--transition-default);
}

.contact-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.contact-icon {
  width: 36px;
  height: 36px;
  color: var(--color-accent-light);
  margin-bottom: 12px;
}

.contact-icon svg {
  width: 100%;
  height: 100%;
}

.contact-label {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.contact-value {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* === Timeline Centered === */
.timeline-centered {
  position: relative;
  max-width: 900px;
  margin: 60px auto 0;
  padding: 20px 0;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--color-text-muted) 0,
    var(--color-text-muted) 6px,
    transparent 6px,
    transparent 12px
  );
  opacity: 0.4;
  transform: translateX(-50%);
}

.tl-item {
  display: flex;
  align-items: center;
  position: relative;
  margin-bottom: 60px;
  width: 100%;
}

.tl-item:last-child {
  margin-bottom: 0;
}

/* Left items: content on left, node in center */
.tl-left {
  justify-content: flex-end;
  padding-right: calc(50% + 30px);
  text-align: right;
}

.tl-left .tl-node {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

/* Right items: node in center, content on right */
.tl-right {
  justify-content: flex-start;
  padding-left: calc(50% + 30px);
  text-align: left;
}

.tl-right .tl-node {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

/* Node circles */
.tl-node {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  background: var(--color-bg-section-light);
  flex-shrink: 0;
  z-index: 2;
  transition: var(--transition-default);
}

.tl-node-lg {
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent-glow);
}

.tl-node-featured {
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  border: 3px dashed var(--color-accent-light);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

/* Content */
.tl-content {
  max-width: 340px;
}

.tl-month {
  display: block;
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: lowercase;
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}

.tl-year {
  display: block;
  font-size: 1.4rem;
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.tl-content p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Mobile: stack all to one side */
@media (max-width: 767px) {
  .timeline-line {
    left: 20px;
  }

  .tl-item {
    padding-left: 50px !important;
    padding-right: 0 !important;
    justify-content: flex-start !important;
    text-align: left !important;
  }

  .tl-left .tl-node,
  .tl-right .tl-node {
    left: 20px;
  }

  .tl-content {
    max-width: 100%;
  }
}

/* === Clients Carousel === */
.carousel {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 50px;
}

.carousel-track {
  flex: 1;
  min-height: 160px;
  overflow: hidden;
}

.carousel-slide {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.carousel-slide.active {
  display: grid;
  opacity: 1;
}

.carousel-btn {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-default);
  padding: 0;
  opacity: 0.5;
}

.carousel-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-light);
  opacity: 1;
}

.carousel-btn svg {
  width: 18px;
  height: 18px;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: var(--color-border);
  cursor: pointer;
  padding: 0;
  transition: var(--transition-default);
}

.carousel-dot.active {
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
}

.carousel-controls {
  display: none;
}

.client-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 25px 15px;
  border-radius: var(--card-radius);
  background: var(--color-card-bg);
  border: var(--card-border);
  transition: var(--transition-default);
}

.client-item:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.client-logo {
  max-width: 120px;
  max-height: 60px;
  object-fit: contain;
  margin-bottom: 12px;
  filter: grayscale(100%) brightness(1.5);
  opacity: 0.7;
  transition: var(--transition-default);
}

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

.client-name {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: var(--font-weight-bold);
}

/* === Footer === */
footer {
  padding: 40px 5%;
  text-align: center;
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
}

footer p {
  color: var(--color-text-subtle);
  font-size: var(--font-size-small);
}

/* === Animations (only when JS is active) === */
.js .animate-on-scroll {
  opacity: 0;
  transform: translateY(var(--animation-distance));
  transition: opacity var(--animation-duration) ease, transform var(--animation-duration) ease;
}

.js .animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Utility === */
.highlight {
  color: var(--color-accent-hover);
  font-weight: var(--font-weight-bold);
}

/* === Focus styles for accessibility === */
:focus-visible {
  outline: 2px solid var(--color-accent-light);
  outline-offset: 3px;
}