/* ============================================================
   Portfolio — Main Stylesheet
   Professional Cyberpunk Aesthetic
   ============================================================ */

@import 'fonts.css';

/* ── 1. Design Tokens ─────────────────────────────────────── */
:root {
  /* Colors */
  --clr-bg:            #0f0f14;
  --clr-bg-secondary:  #1a1a2e;
  --clr-bg-card:       #13131a;
  --clr-bg-card-hover: #16161f;
  --clr-cyan:          #4ecdc4;
  --clr-violet:        #7f7fd5;
  --clr-text:          #f5f5f5;
  --clr-muted:         #a0a0b0;
  --clr-border:        rgba(78, 205, 196, 0.12);
  --clr-border-hover:  rgba(78, 205, 196, 0.38);
  --clr-glow-cyan:     rgba(78, 205, 196, 0.14);
  --clr-glow-violet:   rgba(127, 127, 213, 0.14);
  --clr-grad-accent:   linear-gradient(135deg, var(--clr-cyan), var(--clr-violet));

  /* Typography */
  --ff-heading: 'Space Grotesk', system-ui, sans-serif;
  --ff-body:    'Inter', system-ui, sans-serif;
  --ff-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Fluid type scale */
  --text-xs:   clamp(0.72rem,  1.4vw, 0.8rem);
  --text-sm:   clamp(0.85rem,  1.7vw, 0.95rem);
  --text-base: clamp(1rem,     2vw,   1.05rem);
  --text-lg:   clamp(1.1rem,   2.2vw, 1.25rem);
  --text-xl:   clamp(1.25rem,  2.8vw, 1.5rem);
  --text-2xl:  clamp(1.5rem,   3.5vw, 2rem);
  --text-3xl:  clamp(2rem,     4.5vw, 3rem);
  --text-hero: clamp(2.6rem,   6.5vw, 4.5rem);

  /* Spacing */
  --sp-xs:      0.375rem;
  --sp-sm:      0.75rem;
  --sp-md:      1.25rem;
  --sp-lg:      2rem;
  --sp-xl:      3rem;
  --sp-2xl:     5rem;
  --sp-section: clamp(4rem, 9vw, 8rem);

  /* Shape */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  20px;

  /* Motion */
  --ease-out:        cubic-bezier(0.22, 1, 0.36, 1);
  --tr-fast:         150ms ease;
  --tr-base:         250ms ease;
  --tr-slow:         400ms var(--ease-out);

  /* Shadows */
  --shadow-card:     0 4px 24px rgba(0,0,0,0.45);
  --shadow-glow-c:   0 0 28px var(--clr-glow-cyan);
  --shadow-glow-v:   0 0 28px var(--clr-glow-violet);

  /* Layout */
  --max-width:  1200px;
  --nav-height: 68px;
}

/* ── 2. Reset & Base ──────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--ff-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--clr-cyan);
  text-decoration: none;
  transition: color var(--tr-fast);
}
a:hover { color: var(--clr-violet); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--ff-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-text);
}

ul, ol { list-style: none; }

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

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

/* ── 3. Utilities ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

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

.section-alt {
  background-color: var(--clr-bg-secondary);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.text-cyan   { color: var(--clr-cyan); }
.text-violet { color: var(--clr-violet); }
.text-muted  { color: var(--clr-muted); }
.text-mono   { font-family: var(--ff-mono); }
.text-center { text-align: center; }

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── 4. Background Grid ───────────────────────────────────── */
.bg-grid {
  background-image:
    linear-gradient(var(--clr-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-border) 1px, transparent 1px);
  background-size: 56px 56px;
}

/* ── 5. Section Headers ───────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-label {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-cyan);
  margin-bottom: var(--sp-sm);
}

.section-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--sp-sm);
}

.section-title span {
  background: var(--clr-grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  color: var(--clr-muted);
  font-size: var(--text-lg);
  max-width: 55ch;
  margin-inline: auto;
}

/* ── 6. Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-family: var(--ff-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--tr-base);
  cursor: pointer;
  text-decoration: none;
  line-height: 1;
}

.btn--primary {
  background: var(--clr-grad-accent);
  color: #0f0f14;
  border: 1px solid transparent;
}
.btn--primary:hover {
  color: #0f0f14;
  box-shadow: var(--shadow-glow-c);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--clr-text);
  border: 1px solid var(--clr-border-hover);
}
.btn--outline:hover {
  border-color: var(--clr-cyan);
  color: var(--clr-cyan);
  box-shadow: var(--shadow-glow-c);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 0.5rem 1.1rem;
  font-size: var(--text-xs);
}

/* ── 7. Navigation ────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  transition: background-color var(--tr-base), border-color var(--tr-base);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background-color: rgba(15, 15, 20, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--clr-border);
}

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

.nav__logo {
  font-family: var(--ff-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--clr-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
}
.nav__logo span {
  color: var(--clr-cyan);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2rem);
}

.nav__links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--clr-muted);
  text-decoration: none;
  transition: color var(--tr-fast);
  position: relative;
}
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--clr-cyan);
  transform: scaleX(0);
  transition: transform var(--tr-base);
}
.nav__links a:hover,
.nav__links a.is-active {
  color: var(--clr-text);
}
.nav__links a:hover::after,
.nav__links a.is-active::after {
  transform: scaleX(1);
}

.nav__cta {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--clr-border-hover);
  border-radius: var(--radius-md);
  color: var(--clr-cyan) !important;
  transition: all var(--tr-base) !important;
}
.nav__cta:hover {
  background: var(--clr-glow-cyan);
  border-color: var(--clr-cyan) !important;
  box-shadow: var(--shadow-glow-c);
}
.nav__cta::after { display: none !important; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-xs);
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: all var(--tr-base);
}

/* ── 8. Hero ──────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

.hero__bg-accent {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}
.hero__bg-accent--cyan {
  width: 500px;
  height: 500px;
  background: var(--clr-glow-cyan);
  top: -100px;
  right: -100px;
}
.hero__bg-accent--violet {
  width: 400px;
  height: 400px;
  background: var(--clr-glow-violet);
  bottom: -50px;
  left: -80px;
}

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

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-md);
}
.hero__eyebrow-line {
  width: 40px;
  height: 1px;
  background: var(--clr-cyan);
}
.hero__eyebrow-text {
  font-family: var(--ff-mono);
  font-size: var(--text-xs);
  color: var(--clr-cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero__name {
  font-size: var(--text-hero);
  font-weight: 700;
  line-height: 1.05;
  margin-bottom: var(--sp-md);
}
.hero__name-accent {
  background: var(--clr-grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__role {
  font-family: var(--ff-mono);
  font-size: var(--text-xl);
  color: var(--clr-muted);
  margin-bottom: var(--sp-lg);
  min-height: 2em;
  display: flex;
  align-items: center;
  gap: 0.25em;
}
.hero__role-prefix {
  color: var(--clr-cyan);
}
.hero__role-text {
  color: var(--clr-text);
}
.hero__cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--clr-cyan);
  animation: blink 1s step-end infinite;
  vertical-align: middle;
  margin-left: 2px;
}

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

.hero__summary {
  font-size: var(--text-lg);
  color: var(--clr-muted);
  max-width: 60ch;
  margin-bottom: var(--sp-xl);
  line-height: 1.8;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-md);
}

/* ── 9. About ─────────────────────────────────────────────── */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.about__photo-wrap {
  position: relative;
  width: min(280px, 100%);
}

.about__photo-wrap::before {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: var(--radius-xl);
  background: var(--clr-grad-accent);
  z-index: -1;
}

.about__photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-xl);
  border: 3px solid var(--clr-bg);
}

.about__photo-placeholder {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  color: var(--clr-muted);
  font-size: var(--text-sm);
}

.about__bio p {
  color: var(--clr-muted);
  margin-bottom: var(--sp-md);
  font-size: var(--text-base);
  line-height: 1.8;
}

.about__stats {
  display: flex;
  gap: var(--sp-xl);
  flex-wrap: wrap;
  margin: var(--sp-xl) 0;
  padding: var(--sp-lg) 0;
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.about__stat-value {
  font-family: var(--ff-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  background: var(--clr-grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.about__stat-label {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  margin-top: var(--sp-xs);
}

/* ── 10. Skills ───────────────────────────────────────────── */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--sp-lg);
}

.skills__category {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg);
  transition: border-color var(--tr-base);
}
.skills__category:hover {
  border-color: var(--clr-border-hover);
}

.skills__category-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--clr-cyan);
  margin-bottom: var(--sp-md);
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
}
.skills__category-title::before {
  content: '';
  width: 3px;
  height: 1.1em;
  background: var(--clr-grad-accent);
  border-radius: 2px;
}

.skills__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.35em 0.75em;
  background: rgba(78, 205, 196, 0.07);
  border: 1px solid var(--clr-border);
  border-radius: 999px;
  font-size: var(--text-sm);
  color: var(--clr-muted);
  transition: all var(--tr-fast);
  white-space: nowrap;
}
.skill-tag:hover {
  border-color: var(--clr-cyan);
  color: var(--clr-text);
  background: rgba(78, 205, 196, 0.12);
}

/* ── 11. Projects ─────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  justify-content: center;
  margin-bottom: var(--sp-xl);
}

.filter-btn {
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--clr-border);
  border-radius: 999px;
  font-size: var(--text-sm);
  color: var(--clr-muted);
  background: transparent;
  cursor: pointer;
  transition: all var(--tr-base);
  font-family: var(--ff-body);
}
.filter-btn:hover,
.filter-btn.is-active {
  border-color: var(--clr-cyan);
  color: var(--clr-cyan);
  background: rgba(78, 205, 196, 0.1);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: var(--sp-lg);
}

.project-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--tr-base),
              box-shadow var(--tr-base),
              transform var(--tr-base);
}
.project-card:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--shadow-glow-c);
  transform: translateY(-4px);
}
.project-card.is-hidden {
  display: none;
}

.project-card__image {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--clr-bg-secondary);
}
.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--tr-slow);
}
.project-card:hover .project-card__image img {
  transform: scale(1.04);
}
.project-card__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-border-hover);
  font-family: var(--ff-mono);
  font-size: var(--text-sm);
}

.project-card__body {
  padding: var(--sp-md);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--sp-sm);
}

.project-card__category {
  font-family: var(--ff-mono);
  font-size: var(--text-xs);
  color: var(--clr-cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.3;
}

.project-card__desc {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  line-height: 1.6;
  flex: 1;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
}
.tech-pill {
  padding: 0.2em 0.6em;
  border-radius: 4px;
  font-family: var(--ff-mono);
  font-size: var(--text-xs);
  color: var(--clr-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
}

.project-card__links {
  display: flex;
  gap: var(--sp-sm);
  padding-top: var(--sp-sm);
  border-top: 1px solid var(--clr-border);
}
.project-card__links a {
  font-size: var(--text-xs);
  color: var(--clr-muted);
  display: flex;
  align-items: center;
  gap: 0.3em;
  transition: color var(--tr-fast);
}
.project-card__links a:hover {
  color: var(--clr-cyan);
}

/* ── 12. Robotics Section ─────────────────────────────────── */
.robotics {
  background: var(--clr-bg-secondary);
  position: relative;
  overflow: hidden;
}
.robotics::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(var(--clr-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-border) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.5;
}
.robotics .section-header,
.robotics__grid {
  position: relative;
  z-index: 1;
}

.robotics__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: var(--sp-lg);
}

.robotics-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg);
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  transition: border-color var(--tr-base), box-shadow var(--tr-base), transform var(--tr-base);
}
.robotics-card:hover {
  border-color: rgba(127, 127, 213, 0.4);
  box-shadow: var(--shadow-glow-v);
  transform: translateY(-4px);
}

.robotics-card__header {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
}

.robotics-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(127, 127, 213, 0.12);
  border: 1px solid rgba(127, 127, 213, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.3rem;
}

.robotics-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
}

.robotics-card__desc {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  line-height: 1.65;
  flex: 1;
}

.robotics-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-xs);
  align-items: center;
}

.robotics-card__links {
  display: flex;
  gap: var(--sp-sm);
  margin-top: var(--sp-xs);
}
.robotics-card__links a {
  font-size: var(--text-xs);
  color: var(--clr-violet);
  display: flex;
  align-items: center;
  gap: 0.3em;
}
.robotics-card__links a:hover { color: var(--clr-text); }

/* ── 13. Blog ─────────────────────────────────────────────── */
.blog__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--sp-lg);
}

.blog-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--tr-base), box-shadow var(--tr-base), transform var(--tr-base);
}
.blog-card:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--shadow-glow-c);
  transform: translateY(-4px);
}

.blog-card__image {
  aspect-ratio: 16/8;
  overflow: hidden;
  background: var(--clr-bg-secondary);
}
.blog-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--tr-slow);
}
.blog-card:hover .blog-card__image img { transform: scale(1.04); }

.blog-card__body {
  padding: var(--sp-md);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--sp-sm);
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  font-size: var(--text-xs);
  color: var(--clr-muted);
  font-family: var(--ff-mono);
}
.blog-card__meta .dot { opacity: 0.4; }

.blog-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.3;
  color: var(--clr-text);
  text-decoration: none;
  transition: color var(--tr-fast);
}
.blog-card__title:hover { color: var(--clr-cyan); }

.blog-card__excerpt {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  line-height: 1.65;
  flex: 1;
}

.blog-card__read-more {
  font-size: var(--text-sm);
  color: var(--clr-cyan);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.3em;
  transition: gap var(--tr-fast);
}
.blog-card__read-more:hover { gap: 0.6em; color: var(--clr-cyan); }

.blog__view-all {
  text-align: center;
  margin-top: var(--sp-xl);
}

/* ── 14. Contact ──────────────────────────────────────────── */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.contact__info-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--sp-md);
}
.contact__info-desc {
  color: var(--clr-muted);
  margin-bottom: var(--sp-xl);
  line-height: 1.8;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}
.contact__detail {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  font-size: var(--text-sm);
  color: var(--clr-muted);
}
.contact__detail-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(78, 205, 196, 0.08);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--clr-cyan);
  font-size: 1rem;
}

.contact__socials {
  display: flex;
  gap: var(--sp-sm);
  margin-top: var(--sp-xl);
}
.social-link {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-muted);
  font-size: 1.1rem;
  text-decoration: none;
  transition: all var(--tr-base);
}
.social-link:hover {
  border-color: var(--clr-cyan);
  color: var(--clr-cyan);
  background: var(--clr-glow-cyan);
  box-shadow: var(--shadow-glow-c);
}

/* Contact Form */
.contact__form {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-xl);
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

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

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

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

.form-input,
.form-textarea {
  width: 100%;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: var(--clr-text);
  font-size: var(--text-sm);
  transition: border-color var(--tr-fast), box-shadow var(--tr-fast);
  outline: none;
}
.form-input:focus,
.form-textarea:focus {
  border-color: var(--clr-cyan);
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.1);
}
.form-textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

.form-error {
  font-size: var(--text-xs);
  color: #f87171;
  display: none;
}
.form-group.has-error .form-error { display: block; }
.form-group.has-error .form-input,
.form-group.has-error .form-textarea {
  border-color: #f87171;
}

.form-status {
  padding: var(--sp-sm) var(--sp-md);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  display: none;
}
.form-status--success {
  background: rgba(78, 205, 196, 0.1);
  border: 1px solid rgba(78, 205, 196, 0.3);
  color: var(--clr-cyan);
  display: block;
}
.form-status--error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: #f87171;
  display: block;
}

.btn--loading {
  opacity: 0.7;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── 15. Footer ───────────────────────────────────────────── */
.footer {
  background: var(--clr-bg-secondary);
  border-top: 1px solid var(--clr-border);
  padding-block: var(--sp-xl);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-md);
}

.footer__copy {
  font-size: var(--text-sm);
  color: var(--clr-muted);
}
.footer__copy span {
  color: var(--clr-cyan);
}

.footer__links {
  display: flex;
  gap: var(--sp-lg);
}
.footer__links a {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  transition: color var(--tr-fast);
}
.footer__links a:hover { color: var(--clr-text); }

.footer__socials {
  display: flex;
  gap: var(--sp-sm);
}
.footer__socials .social-link {
  width: 36px;
  height: 36px;
  font-size: 0.9rem;
}

/* ── 16. Scroll Reveal Animations ─────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s var(--ease-out), transform 0.55s var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 17. Empty States ─────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: var(--sp-2xl) var(--sp-lg);
  color: var(--clr-muted);
}
.empty-state p {
  font-size: var(--text-lg);
  margin-bottom: var(--sp-md);
}

/* ── 18. Reduced Motion ───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html { scroll-behavior: auto; }
}

/* ── 19. Responsive ───────────────────────────────────────── */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 1fr;
  }
  .about__photo-wrap {
    margin-inline: auto;
  }
  .contact__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(15, 15, 20, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--sp-xl) var(--sp-lg);
    gap: var(--sp-lg);
    border-bottom: 1px solid var(--clr-border);
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { font-size: var(--text-lg); }
  .nav__toggle { display: flex; }
  .nav__cta { display: none; }

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

  .about__stats {
    gap: var(--sp-lg);
  }

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

@media (max-width: 480px) {
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
  .filter-bar {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--sp-xs);
  }
  .filter-btn { flex-shrink: 0; }
}