/* ==========================================================================
   JAISAL K JAIN — PERSONAL PORTFOLIO
   Design: Minimalist serif, cream + near-black + burnt orange accent
   Font: Newsreader (Google Fonts), IBM Plex Mono for tags/labels
   ========================================================================== */

/* --- Design Tokens --- */
:root {
  /* Colors */
  --color-bg:        #FAF7F2;
  --color-bg-alt:    #F3EFE8;
  --color-text:      #1C1917;
  --color-text-soft: #57534E;
  --color-border:    #E7E0D6;
  --color-accent:    #B45309;
  --color-accent-hover: #92400E;

  /* Typography */
  --font-serif: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-mono:  'IBM Plex Mono', 'Courier New', monospace;

  /* Spacing */
  --space-xs:  0.4rem;
  --space-sm:  0.75rem;
  --space-md:  1.25rem;
  --space-lg:  2rem;
  --space-xl:  3rem;
  --space-2xl: 4.5rem;

  /* Layout */
  --max-width: 720px;
  --header-height: 56px;
}


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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--space-md));
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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


/* --- Layout Container --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}


/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.header-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.header-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-text-soft);
  letter-spacing: 0.02em;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-md);
}

.nav-links a {
  font-size: 0.85rem;
  color: var(--color-text-soft);
  font-weight: 400;
  transition: color 0.2s ease;
  letter-spacing: 0.01em;
}

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

.header-icons {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-soft);
  transition: color 0.2s ease;
}

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

.icon-link svg {
  width: 18px;
  height: 18px;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--color-text);
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}


/* --- Sections --- */
section {
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
}

.section-heading {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}


/* --- Hero / Intro --- */
.hero {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-md);
}

.hero-name {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.hero-role {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  font-weight: 400;
  color: var(--color-text-soft);
  margin-bottom: var(--space-md);
}

.hero-bio {
  max-width: 600px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-soft);
  margin-bottom: var(--space-lg);
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 400;
  padding: 0.55rem 1.1rem;
  border-radius: 4px;
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

.btn svg {
  width: 15px;
  height: 15px;
}

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

.btn-primary:hover {
  background-color: #292524;
  color: var(--color-bg);
}

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

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


/* --- Projects --- */
.project {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.project:last-of-type {
  border-bottom: none;
  margin-bottom: var(--space-md);
  padding-bottom: 0;
}

.project-header {
  margin-bottom: var(--space-sm);
}

.project-title {
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--color-text);
  margin-bottom: 0.6rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--space-sm);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  color: var(--color-text-soft);
  background-color: var(--color-bg-alt);
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  letter-spacing: 0.01em;
  border: 1px solid var(--color-border);
}

.project-description {
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--color-text-soft);
  margin-bottom: var(--space-md);
}

.project-description ul {
  list-style: none;
  padding: 0;
}

.project-description li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.35rem;
}

.project-description li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-border);
}

.project-media {
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  overflow: hidden;
}

.project-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}


.project-media-placeholder {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-soft);
  opacity: 0.5;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-accent);
  transition: color 0.2s ease;
}

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

.project-link svg {
  width: 14px;
  height: 14px;
}

/* "More projects" CTA */
.projects-cta {
  text-align: center;
  padding-top: var(--space-md);
}

.projects-cta p {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
}


/* --- Skills --- */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.skill-category h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-soft);
  margin-bottom: var(--space-xs);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}


/* --- Education --- */
.education-entry {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.education-degree {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.35;
}

.education-school {
  font-size: 0.88rem;
  color: var(--color-text-soft);
  opacity: 0.8;
}

.education-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-soft);
  letter-spacing: 0.02em;
}


/* --- Certifications --- */
.certifications-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}


/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: 0;
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
}

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

.footer-left {
  font-size: 0.85rem;
  color: var(--color-text-soft);
}

.footer-icons {
  display: flex;
  gap: var(--space-sm);
}


/* --- Scroll Fade-in Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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


/* --- Responsive — Tablet --- */
@media (max-width: 768px) {
  :root {
    --space-xs:  0.35rem;
    --space-sm:  0.65rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2.25rem;
    --space-2xl: 3rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
    gap: 0;
  }

  .nav-links a {
    display: block;
    padding: var(--space-sm) 0;
  }

  .nav-links.open {
    display: flex;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-icons {
    display: none;
  }

  .hero-name {
    font-size: 2rem;
  }

  .project-title {
    font-size: 1.2rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

/* --- Responsive — Mobile --- */
@media (max-width: 480px) {
  body {
    font-size: 1rem;
  }

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

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