/* ============================================
   HUNBAL SIDDIQUI - MODERN PORTFOLIO
   ============================================ */

/* --- CSS Variables (Theming) --- */
:root,
[data-theme="dark"] {
  --bg-primary: #0d0d0f;
  --bg-secondary: #141416;
  --bg-elevated: #1a1a1e;
  --bg-glass: rgba(255, 255, 255, 0.04);
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #03c988;
  --accent-hover: #02b378;
  --accent-muted: rgba(3, 201, 136, 0.15);
  --accent-glow: rgba(3, 201, 136, 0.25);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --scrollbar-track: #1a1a1e;
  --scrollbar-thumb: rgba(3, 201, 136, 0.25);
}

[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #f4f4f5;
  --bg-elevated: #ffffff;
  --bg-glass: rgba(0, 0, 0, 0.04);
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --accent: #059669;
  --accent-hover: #047857;
  --accent-muted: rgba(5, 150, 105, 0.12);
  --accent-glow: rgba(5, 150, 105, 0.2);
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --scrollbar-track: #e4e4e7;
  --scrollbar-thumb: rgba(5, 150, 105, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Syne", system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, var(--accent-glow), transparent);
  pointer-events: none;
  z-index: -1;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* --- Theme Toggle --- */
.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 1000;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  color: var(--text-primary);
  transition: all 0.3s ease;
  backdrop-filter: blur(12px);
}

.theme-toggle:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
}

.theme-icon {
  position: absolute;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.theme-icon--sun {
  opacity: 0;
}

.theme-icon--moon {
  opacity: 1;
}

[data-theme="light"] .theme-icon--sun {
  opacity: 1;
}

[data-theme="light"] .theme-icon--moon {
  opacity: 0;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  width: 44px;
  height: 44px;
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition: all 0.3s ease;
  rotate: 90deg;
}

.back-to-top.visible {
  display: flex;
}

.back-to-top:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
}

.back-to-top img {
  width: 20px;
  height: 20px;
  transform: rotate(-90deg);
}

/* --- Layout --- */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  padding-left: 3.5rem; /* Clear fixed social strip on left */
}

@media (min-width: 768px) {
  .main {
    padding: 0 2rem;
    padding-left: 4rem;
  }
}

@media (max-width: 640px) {
  .main {
    padding-left: 4rem; /* Clear social strip on mobile - prevent overlap */
  }
}

@media (max-width: 480px) {
  .main {
    padding-left: 3.75rem;
  }
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
  background: rgba(13, 13, 15, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s ease, border-color 0.4s ease;
  padding: 0.5rem 0.5rem 0.5rem 0.75rem;
}

[data-theme="light"] .header {
  background: rgba(250, 250, 250, 0.9);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
}

.logo__outer {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(45deg);
  background: linear-gradient(135deg, var(--accent), #1c82ad);
  border-radius: 10px;
  transition: transform 0.3s ease;
}

.logo:hover .logo__outer {
  transform: rotate(0deg);
}

.logo__inner {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border-radius: 8px;
}

.logo__inner span {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), #1c82ad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transform: rotate(-45deg);
  transition: transform 0.3s ease;
}

.logo:hover .logo__inner span {
  transform: rotate(-45deg) scale(0.9);
}

/* Nav */
.nav__checkbox {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.nav__list {
  display: none;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 768px) {
  .nav__list {
    display: flex;
  }
}

.nav__hamburger {
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 8px;
}

@media (min-width: 768px) {
  .nav__hamburger {
    display: none;
  }
}

.nav__hamburger-line {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav__checkbox:checked ~ .nav__list {
  display: flex;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--bg-primary);
  z-index: 99;
}

@media (min-width: 768px) {
  .nav__checkbox:checked ~ .nav__list {
    position: static;
    flex-direction: row;
    background: transparent;
  }
}

.nav__checkbox:checked ~ .nav__hamburger {
  position: fixed;
  top: 1.25rem;
  right: 1rem;
  z-index: 101;
}

@media (min-width: 768px) {
  .nav__checkbox:checked ~ .nav__hamburger {
    position: static;
    display: none;
  }
}

.nav__checkbox:checked ~ .nav__hamburger .nav__hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav__checkbox:checked ~ .nav__hamburger .nav__hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav__checkbox:checked ~ .nav__hamburger .nav__hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav__link {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

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

.nav__cta {
  margin-left: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), #1c82ad);
  color: var(--bg-primary);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn__icon {
  transition: transform 0.3s ease;
}

.btn:hover .btn__icon {
  transform: translateX(4px);
}

/* --- Hero --- */
.hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 0;
  position: relative;
}

@media (min-width: 768px) {
  .hero {
    flex-direction: row;
    align-items: center;
    gap: 4rem;
  }
}

.hero__content {
  flex: 1;
  max-width: 640px;
}

.hero__greeting {
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-family: "JetBrains Mono", monospace;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero__title--accent {
  color: var(--text-secondary);
  font-weight: 600;
}

.hero__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
  .hero__desc {
    font-size: 1.125rem;
  }
}

.hero__cta {
  margin-top: 0.5rem;
}

.hero__visual {
  flex: 1;
  position: relative;
  min-height: 200px;
}

@media (min-width: 768px) {
  .hero__visual {
    min-height: 300px;
  }
}

.hero__glow {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* --- Section Title --- */
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-title__accent {
  color: var(--text-secondary);
  font-weight: 600;
}

/* --- Stack --- */
.stack {
  padding: 5rem 0;
}

.stack__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  max-width: 900px;
  margin: 0 auto;
}

.stack__tag {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: "JetBrains Mono", monospace;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.stack__tag:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* --- Projects --- */
.projects {
  padding: 5rem 0;
}

.projects__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.project-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.4s ease;
}

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

.project-card__img-wrap {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-secondary);
}

.project-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-card__img {
  transform: scale(1.05);
}

.project-card__info {
  padding: 1rem 1.25rem;
}

.project-card__name {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  text-transform: capitalize;
}

.project-card__tag {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: "JetBrains Mono", monospace;
}

/* --- Blogs --- */
.blogs {
  padding: 5rem 0;
}

.blogs__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .blogs__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.blog-card {
  display: block;
  padding: 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.3s ease;
}

.blog-card:hover {
  border-color: var(--accent);
  background: var(--accent-muted);
  transform: translateY(-2px);
}

.blog-card__thumb {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
}

.blog-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.blog-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.4;
  color: var(--text-primary);
}

.blog-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__arrow {
  display: inline-flex;
  transition: transform 0.3s ease;
}

.blog-card__arrow img {
  width: 20px;
  height: 20px;
}

.blog-card:hover .blog-card__arrow {
  transform: translateX(4px);
}

.blogs__cta {
  display: flex;
  justify-content: center;
}

/* --- Footer --- */
.footer {
  padding: 5rem 0 3rem;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer__text {
  max-width: 560px;
  margin: 0 auto 1rem;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer__email {
  margin: 0 auto 1.5rem;
  font-size: 1.05rem;
  text-align: center;
}

.footer__email a {
  color: var(--accent);
  font-weight: 500;
}

.footer__email a:hover {
  text-decoration: underline;
}

.footer__cta {
  margin-bottom: 4rem;
}

.footer__copy {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer__copy p,
.footer__copy span {
  display: block;
  margin: 0.25rem 0;
}

/* --- Social Strip --- */
.social-strip {
  position: fixed;
  left: 1rem;
  bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 99;
}

@media (max-width: 640px) {
  .social-strip {
    left: 0.5rem;
    bottom: 1.5rem;
  }
}

.social-strip__link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
}

.social-strip__link:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
  transform: scale(1.05);
}

.social-strip__icon {
  width: 20px;
  height: 20px;
  opacity: 0.9;
}

/* Icons (SVG) - dark theme: light icons */
[data-theme="dark"] .social-strip__icon {
  filter: brightness(0) invert(1);
}

/* Icons - light theme: dark icons */
[data-theme="light"] .social-strip__icon {
  filter: brightness(0);
}

/* PNG icons (blog, etc.) - preserve colors in dark mode */
[data-theme="dark"] .social-strip__link img[src*="blog-icon"] {
  filter: brightness(0) invert(1);
}

[data-theme="light"] .social-strip__link img[src*="blog-icon"] {
  filter: brightness(0);
}

/* --- Utility: No scroll when menu open --- */
body.menu-open {
  overflow: hidden;
}

/* --- Responsive adjustments --- */
@media (max-width: 767px) {
  .theme-toggle {
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
  }

  .hero {
    padding: 2rem 0;
  }

  .stack,
  .projects,
  .blogs {
    padding: 3rem 0;
  }

  .section-title {
    margin-bottom: 2rem;
  }
}