/* ============================================
   Alish Kumar — Senior Mobile Developer
   Classic, clean, mobile-first profile
   ============================================ */

:root {
  --color-bg: #fafaf9;
  --color-bg-alt: #f5f5f4;
  --color-text: #1c1917;
  --color-text-muted: #57534e;
  --color-accent: #1e3a5f;
  --color-accent-hover: #2c5282;
  --color-border: #e7e5e4;
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-body: "Source Sans 3", -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 720px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --radius: 4px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* ----- Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 249, 0.95);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 3.5rem;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

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

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.nav-toggle:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-text-muted);
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 1rem;
  margin: 0 auto;
  background: var(--color-text);
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.main-nav {
  display: none;
}

.main-nav.is-open {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav li {
  border-bottom: 1px solid var(--color-border);
}

.main-nav li:last-child {
  border-bottom: none;
}

.main-nav a {
  display: block;
  padding: var(--space-sm) 0;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ----- Hero ----- */
.hero {
  padding: var(--space-2xl) 0;
  text-align: center;
}

.hero-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xs);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 8vw, 3.5rem);
  font-weight: 600;
  margin: 0 0 var(--space-sm);
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.hero-tagline {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-lg);
  max-width: 28ch;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

/* ----- Sections ----- */
.section {
  padding: var(--space-xl) 0;
}

.section:nth-child(even) {
  background: var(--color-bg-alt);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  margin: 0 0 var(--space-md);
  color: var(--color-text);
  letter-spacing: 0.02em;
}

/* ----- About ----- */
.about-content .lead {
  font-size: 1.125rem;
  color: var(--color-text);
  margin: 0 0 var(--space-sm);
}

.about-content p:last-child {
  margin: 0;
  color: var(--color-text-muted);
}

/* ----- Experience (Timeline) ----- */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.timeline-item {
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.timeline-item:last-of-type {
  padding-bottom: 0;
  border-bottom: none;
}

.timeline-period {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: var(--space-xs);
}

.timeline-role {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 var(--space-xs);
}

.timeline-company {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
}

.timeline-desc p {
  margin: 0 0 var(--space-sm);
  color: var(--color-text);
  font-size: 0.9375rem;
  line-height: 1.7;
}

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

.section-note {
  margin: var(--space-md) 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.section-note a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
}

.section-note a:hover {
  text-decoration: underline;
}

/* ----- Skills ----- */
.skills-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.skills-category {
  margin-bottom: var(--space-md);
}

.skills-category-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 var(--space-sm);
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.skills-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.skills-list li {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.9375rem;
}

.section:nth-child(even) .skills-list li {
  background: #fff;
}

/* ----- Resume CTA ----- */
.resume-intro {
  margin: 0 0 var(--space-lg);
  color: var(--color-text-muted);
}

/* ----- Contact ----- */
.contact-intro {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

.contact-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact-links li {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.contact-links strong {
  font-weight: 600;
  color: var(--color-text);
  min-width: 80px;
}

.contact-links a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: none;
}

.contact-links a:hover {
  text-decoration: underline;
}

/* ----- Footer ----- */
.site-footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ----- Desktop: show nav inline, hide toggle ----- */
@media (min-width: 640px) {
  .nav-toggle {
    display: none;
  }

  .main-nav {
    display: block;
    position: static;
    background: transparent;
    border: none;
    padding: 0;
  }

  .main-nav ul {
    display: flex;
    gap: var(--space-lg);
  }

  .main-nav li {
    border: none;
  }

  .main-nav a {
    padding: 0;
    font-size: 0.9375rem;
  }

  .hero {
    padding: var(--space-2xl) 0 calc(var(--space-2xl) + var(--space-lg));
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  .timeline-item {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-lg);
    align-items: start;
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .timeline-meta {
    position: sticky;
    top: 4.5rem;
  }

  .skills-list {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }

  .contact-links {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .contact-links li {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .contact-links strong {
    min-width: auto;
  }
}

@media (min-width: 960px) {
  .container {
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
  }
}