/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* --- Design Tokens --- */
:root {
  --bg: #0a0a0f;
  --bg-elevated: #111118;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --text-primary: #f0f0f5;
  --text-secondary: rgba(240, 240, 245, 0.6);
  --text-tertiary: rgba(240, 240, 245, 0.35);

  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --accent-glow-strong: rgba(99, 102, 241, 0.3);
  --gradient-accent: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(139,92,246,0.08));

  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;

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

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-primary);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection {
  background: var(--accent);
  color: white;
}

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

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

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

/* --- Scroll-triggered animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
.stagger-children .reveal {
  transition-delay: calc(var(--i, 0) * 0.08s);
}

/* --- Background Grain Texture (subtle noise) --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.5;
}

/* --- Gradient Orbs (ambient background) --- */
.gradient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.4;
}

.gradient-orb--1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99,102,241,0.12), transparent 70%);
  top: -200px;
  right: -200px;
  animation: orbFloat1 20s ease-in-out infinite;
}

.gradient-orb--2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139,92,246,0.08), transparent 70%);
  bottom: 20%;
  left: -150px;
  animation: orbFloat2 25s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(-40px, 60px); }
  66% { transform: translate(30px, -30px); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(50px, -40px); }
}

/* ========================
   HEADER / NAVIGATION
   ======================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

.header.scrolled {
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.logo:hover { opacity: 0.8; }

.logo__img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-hover);
}

.logo__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Nav links */
.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav__link {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: color 0.3s ease, background 0.3s ease;
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav__link.active {
  color: var(--accent-light);
}

/* Mobile toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1002;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.3s ease;
}

.nav__toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav__toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========================
   HERO SECTION
   ======================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  position: relative;
}

.hero__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 0 6rem;
}

.hero__avatar-wrapper {
  position: relative;
  margin-bottom: 2rem;
}

.hero__avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-hover);
  position: relative;
  z-index: 1;
  transition: transform 0.5s var(--ease-spring), border-color 0.3s ease;
}

.hero__avatar:hover {
  transform: scale(1.05);
  border-color: var(--accent);
}

.hero__avatar-glow {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  opacity: 0.15;
  filter: blur(20px);
  animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.1; transform: scale(1); }
  50% { opacity: 0.2; transform: scale(1.1); }
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: var(--gradient-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-light);
  margin-bottom: 1.25rem;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  background: linear-gradient(to right, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  position: relative;
  z-index: 1;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
  pointer-events: none;
}

.hero__actions.showing {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--gradient-accent);
  color: white;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow-strong);
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-hover);
}

.btn--outline:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.8rem;
}

.btn--ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

/* Hero scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-tertiary);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: scrollBounce 2s ease-in-out infinite;
  z-index: 0;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.hero__scroll.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-tertiary), transparent);
}

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

/* ========================
   SECTION COMMON
   ======================== */
.section {
  padding: clamp(4rem, 10vw, 7rem) 0;
  position: relative;
}

.section__header {
  margin-bottom: 3rem;
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 0.75rem;
}

.section__label::before {
  content: '';
  width: 20px;
  height: 1.5px;
  background: var(--accent);
  border-radius: 1px;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-top: 0.75rem;
}

/* Divider line between sections */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border), transparent);
}

/* ========================
   ABOUT SECTION
   ======================== */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about__text p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.8;
}

.about__text p:last-child {
  margin-bottom: 0;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.stat:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.stat__number {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent-light);
  line-height: 1;
}

.stat__label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.about__links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.about__link-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease-out);
  text-decoration: none;
}

.about__link-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.about__link-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: var(--radius-sm);
  color: var(--accent-light);
  font-size: 1rem;
  flex-shrink: 0;
}

.about__link-info h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.1rem;
}

.about__link-info p {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.about__link-arrow {
  margin-left: auto;
  color: var(--text-tertiary);
  transition: transform 0.3s ease, color 0.3s ease;
}

.about__link-card:hover .about__link-arrow {
  transform: translateX(4px);
  color: var(--accent-light);
}

/* ========================
   PROJECTS SECTION
   ======================== */

/* Filter tabs */
.projects__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.tab-btn {
  padding: 0.45rem 1.1rem;
  font-family: var(--font-primary);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-tertiary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.25s ease;
}

.tab-btn:hover {
  color: var(--text-secondary);
  border-color: var(--border-hover);
}

.tab-btn.active {
  color: var(--accent-light);
  background: var(--accent-glow);
  border-color: rgba(99, 102, 241, 0.3);
}

/* Project grid */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

/* Project card */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s var(--ease-out);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px var(--accent-glow);
}

.project-card__img-wrap {
  position: relative;
  height: 190px;
  overflow: hidden;
  background: var(--bg-elevated);
}

.project-card__img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  transition: transform 0.5s var(--ease-out);
}

.project-card:hover .project-card__img {
  transform: scale(1.04);
}

.project-card__chip {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 10px;
  background: rgba(10, 10, 15, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-card__body {
  padding: 1.25rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 0.75rem;
}

.project-card__tag {
  padding: 3px 10px;
  background: var(--gradient-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

.project-card__desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex: 1;
}

.project-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

/* hidden project cards */
.project-card.hidden {
  display: none;
}

/* ========================
   SKILLS SECTION
   ======================== */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.skill-card {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease-out);
}

.skill-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.skill-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.skill-card__name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
}

.skill-card__pct {
  font-size: 0.8rem;
  color: var(--accent-light);
  font-weight: 600;
  font-family: var(--font-display);
}

.skill-card__bar {
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.skill-card__fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 4px;
  width: 0;
  transition: width 1.2s var(--ease-out);
}

.skill-card__techs {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* ========================
   CERTIFICATES SECTION
   ======================== */
.certs__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease-out);
  text-decoration: none;
}

.cert-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

.cert-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  flex-shrink: 0;
}

.cert-card__info {
  flex: 1;
}

.cert-card__title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.cert-card__desc {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.cert-card__arrow {
  color: var(--text-tertiary);
  transition: transform 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
}

.cert-card:hover .cert-card__arrow {
  transform: translateX(3px);
  color: var(--accent-light);
}

/* ========================
   CONTACT SECTION
   ======================== */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.contact__info h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.contact__info p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.contact__socials {
  display: flex;
  gap: 0.75rem;
}

.contact__social {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all 0.3s var(--ease-out);
}

.contact__social:hover {
  color: var(--accent-light);
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-3px);
}

/* Contact form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-field label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-primary);
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

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

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

.form-field textarea {
  resize: vertical;
  min-height: 140px;
}

.form__submit {
  align-self: flex-start;
}

/* Alert messages */
.alert {
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  display: none;
}

.alert--success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #4ade80;
}

.alert--error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.alert.show {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ========================
   FOOTER
   ======================== */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

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

.footer__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer__brand-accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s var(--ease-out);
  text-decoration: none;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  transform: translateY(-3px);
}

/* ========================
   RESPONSIVE DESIGN
   ======================== */
@media (max-width: 968px) {
  .hero__content {
    padding: 3rem 0;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .projects__grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }
}

@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transform: translateX(100%);
    transition: transform 0.4s var(--ease-out);
    z-index: 1001;
  }

  .nav__links.open {
    transform: translateX(0);
  }

  .nav__links .nav__link {
    font-size: 1.25rem;
    padding: 0.75rem 2rem;
  }

  .nav__toggle {
    display: flex;
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero__scroll {
    display: none;
  }

  .about__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
  }

  .stat {
    padding: 1rem 0.5rem;
  }

  .stat__number {
    font-size: 1.3rem;
  }

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

  .footer__inner {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__avatar {
    width: 96px;
    height: 96px;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

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

  .about__stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .projects__tabs {
    justify-content: center;
  }

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

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

/* ========================
   CUSTOM CURSOR (Desktop only)
   ======================== */

/* By default, hide the custom cursor (for mobile/tablet) */
#custom-cursor-wrap {
  display: none;
}

@media (pointer: fine) {
  /* Show cursor container on mouse devices */
  #custom-cursor-wrap {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 10001;
    opacity: 1;
    transition: opacity 0.3s ease;
  }

  /* Hide native cursor on all elements */
  body,
  a,
  button,
  input,
  textarea,
  .btn,
  .tab-btn,
  .nav__link,
  .nav__toggle,
  .project-card,
  .about__link-card,
  .cert-card,
  .contact__social {
    cursor: none !important;
  }

  /* The SVG arrow cursor */
  #custom-cursor {
    width: 32px;
    height: 32px;
    fill: var(--accent-light);
    stroke: var(--accent);
    transform: rotate(-120deg);
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1),
                filter 0.3s ease;
    filter: drop-shadow(0 0 6px rgba(129, 140, 248, 0.4));
  }

  /* Hidden state (mouse left viewport) */
  #custom-cursor-wrap.cursor-hidden {
    opacity: 0;
    transform: scale(0.5);
  }

  /* Hover state: scale up + rotate slightly */
  body.cursor-hovered #custom-cursor {
    transform: rotate(-110deg) scale(1.4);
    filter: drop-shadow(0 0 12px rgba(129, 140, 248, 0.6));
  }
}