/* ─────────────────────────────────────────────────────────────
   imshruti — Portfolio Stylesheet
   Design tokens → base styles → layout components → sections
───────────────────────────────────────────────────────────── */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  --color-bg:          #0e0e12;   /* near-black            */
  --color-bg-alt:      #14141a;   /* slightly lighter      */
  --color-surface:     #1c1c24;   /* card surface          */
  --color-border:      #2a2a38;   /* dark border           */

  --color-text:        #e8e8f0;   /* off-white             */
  --color-text-muted:  #8888a8;   /* muted purple-grey     */

  --color-accent:      #7c6af7;   /* soft violet           */
  --color-accent-2:    #f76a8a;   /* coral pink            */
  --color-accent-grad: linear-gradient(135deg, #7c6af7 0%, #f76a8a 100%);

  --font-sans:   'Inter', system-ui, sans-serif;
  --font-serif:  'Playfair Display', Georgia, serif;

  --radius-sm:   6px;
  --radius-md:   14px;
  --radius-full: 9999px;

  --shadow-card: 0 4px 32px rgba(0, 0, 0, 0.35);
  --transition:  0.25s ease;

  --nav-h: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ── Utility ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.container--narrow {
  max-width: 680px;
  margin-inline: auto;
  padding-inline: 1.5rem;
  text-align: center;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--color-accent-grad);
  color: #fff;
  box-shadow: 0 4px 20px rgba(124, 106, 247, 0.4);
}

.btn--primary:hover {
  box-shadow: 0 6px 28px rgba(124, 106, 247, 0.55);
}

.btn--ghost {
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
}

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: 2rem;
  background: rgba(14, 14, 18, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__logo {
  font-weight: 700;
  font-size: 1.1rem;
  background: var(--color-accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.05em;
}

.nav__links {
  display: flex;
  gap: 2rem;
}

.nav__links a {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  transition: color var(--transition);
}

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

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  min-height: 85vh;
  padding-top: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4rem;
  padding-inline: 2rem;
  max-width: 1100px;
  margin-inline: auto;
}

.hero__content {
  flex: 1;
  max-width: 580px;
}

.hero__greeting {
  color: var(--color-accent);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.hero__name {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 6vw, 4rem);
  line-height: 1.1;
  margin-bottom: 0.6rem;
}

.hero__role {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 1.2rem;
}

.hero__tagline {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 460px;
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero__cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__photo {
  flex-shrink: 0;
  width: 300px;
  height: 460px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 40px rgba(124, 106, 247, 0.15), 0 2px 16px rgba(0, 0, 0, 0.4);
  background: var(--color-bg-alt);
  align-self: center;
}

.hero__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

/* ── Sections ───────────────────────────────────────────────── */
.section {
  padding-block: 4rem;
}

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

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
}

/* Indigo underline accent on section titles */
.section__title::after {
  content: '';
  display: block;
  height: 3px;
  width: 48px;
  background: var(--color-accent-grad);
  border-radius: var(--radius-full);
  margin-top: 0.5rem;
}

/* ── About ──────────────────────────────────────────────────── */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about__text p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  font-size: 0.97rem;
}

.about__text a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about__more {
  display: none;
}

.about__more--open {
  display: block;
}

.about__toggle {
  background: none;
  border: none;
  color: var(--color-accent);
  font-size: 0.88rem;
  cursor: pointer;
  padding: 0;
  margin-top: 0.25rem;
  font-family: var(--font-sans);
  transition: opacity var(--transition);
}

.about__toggle:hover {
  opacity: 0.75;
}

.fact {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.fact__icon {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.fact strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.fact p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* ── Skills ─────────────────────────────────────────────────── */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.skill-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.skill-group__title {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.skill-group__list li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding-block: 0.35rem;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition);
}

.skill-group__list li:last-child {
  border-bottom: none;
}

.skill-group__list li:hover {
  color: var(--color-accent);
}

/* ── Projects ───────────────────────────────────────────────── */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-card);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.card__header {
  height: 4px;
}

.card__header--1 { background: linear-gradient(90deg, #7c6af7, #a78bfa); }
.card__header--2 { background: linear-gradient(90deg, #f76a8a, #fb923c); }
.card__header--3 { background: linear-gradient(90deg, #22d3ee, #6ee7b7); }

.card__body {
  padding: 1.5rem;
}

.card__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.card__desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 1.2rem;
  line-height: 1.7;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.2rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-full);
  background: rgba(124, 106, 247, 0.12);
  color: var(--color-accent);
  border: 1px solid rgba(124, 106, 247, 0.25);
}

.card__link {
  font-size: 0.85rem;
  color: var(--color-accent);
  transition: color var(--transition);
}

.card__link:hover {
  color: var(--color-accent-2);
}

/* ── Experience + Education side-by-side ────────────────────── */
.exp-edu__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 768px) {
  .exp-edu__grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

/* ── Experience / Timeline ──────────────────────────────────── */
.timeline {
  list-style: none;
  position: relative;
  padding-left: 2rem;
  max-width: 620px;
}

/* Vertical line running through all items */
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
}

.timeline__item {
  position: relative;
  padding-bottom: 2.4rem;
  display: flex;
  gap: 1.4rem;
  align-items: flex-start;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
  flex-shrink: 0;
}

/* Education entry uses lighter indigo dot */
.timeline__item--edu .timeline__dot {
  background: var(--color-accent-2);
  border-color: var(--color-bg-alt);
}

.timeline__logo {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.timeline__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  /* grayscale by default to unify clashing brand colors on dark bg */
  filter: grayscale(1) opacity(0.75);
  /* screen blend removes dark/white logo backgrounds on dark surfaces */
  mix-blend-mode: screen;
  transition: filter var(--transition);
}

/* GGSIPU logo — show full crest, anchored left */
.timeline__logo--ggsipu img {
  object-fit: contain;
  object-position: left center;
}

.timeline__item:hover .timeline__logo img {
  /* reveal true brand colors on hover */
  filter: grayscale(0) opacity(1);
}

/* Placeholder for logos we don't have yet */
.timeline__logo--placeholder {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: var(--color-surface);
}

.timeline__body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.timeline__period {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  text-transform: uppercase;
  font-weight: 500;
}

.timeline__item--edu .timeline__period {
  color: var(--color-accent-2);
}

.timeline__role {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.timeline__org {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* ── Writing ─────────────────────────────────────────────────── */
.writing__footer {
  margin-top: 1.5rem;
  text-align: right;
}

.writing__more {
  font-size: 0.88rem;
  color: var(--color-accent);
  transition: opacity var(--transition);
  white-space: nowrap;
}

.writing__more:hover {
  opacity: 0.75;
}

.writing__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.writing-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  box-shadow: var(--shadow-card);
}

.writing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  border-color: var(--color-accent);
}

.writing-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.9rem;
}

.writing-card__type {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 500;
}

.writing-card__type--linkedin {
  color: #0A66C2;
}

.writing-card__arrow {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.writing-card:hover .writing-card__arrow {
  color: var(--color-accent);
}

.writing-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.7rem;
  line-height: 1.4;
}

.writing-card__desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}

.writing-card__cta {
  font-size: 0.85rem;
  color: var(--color-accent);
}

/* ── Contact ────────────────────────────────────────────────── */
.contact__sub {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  font-size: 0.97rem;
}

.contact__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.contact__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 0.6rem 1.4rem;
  width: 100%;
  max-width: 340px;
  justify-content: center;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.contact__item:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
  background: rgba(124, 106, 247, 0.06);
}

.contact__icon {
  font-size: 1rem;
  line-height: 1;
}

/* ── Footer ─────────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding-block: 2rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero {
    flex-direction: column-reverse;
    text-align: center;
    gap: 2.5rem;
    padding-top: calc(var(--nav-h) + 2rem);
  }

  .hero__tagline {
    margin-inline: auto;
  }

  .hero__cta {
    justify-content: center;
  }

  .hero__photo {
    width: 220px;
    height: 340px;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .nav__links {
    gap: 1.2rem;
  }

  .section {
    padding-block: 4rem;
  }
}

@media (max-width: 480px) {
  .nav__links {
    gap: 0.8rem;
  }

  .nav__links a {
    font-size: 0.8rem;
  }

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