/* ==========================================================================
   SIDDHANT KULKARNI PORTFOLIO 2026-27 — DESIGN SYSTEM & STYLESHEET
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@500;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,800;1,400;1,600&family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Color Palette */
  --cream: #F8F5EE;
  --cream-light: #F9F6F0;
  --cream-card: #FFFFFF;
  --charcoal: #1F2937;
  --charcoal-subtle: #4B5563;
  --charcoal-muted: #9CA3AF;
  --red: #B91C1C;
  --red-light: #FEE2E2;
  --tape-gray: rgba(210, 205, 195, 0.75);

  /* Category Tag Colors */
  --tag-ux: #DBEAFE;
  --tag-interaction: #CFF4FC;
  --tag-experience: #E0F2FE;
  --tag-product: #FDE047;
  --tag-game: #F472B6;
  --tag-web: #86EFAC;
  --tag-hci: #FCA5A5;
  --tag-ai: #F9A8D4;

  /* Fonts */
  --font-serif: 'Georgia Pro', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-hand: 'Caveat', cursive;

  /* Layout & Shadows */
  --max-width: 1280px;
  --nav-height: 64px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-paper: 0 6px 24px -4px rgba(31, 41, 55, 0.08), 0 2px 8px -2px rgba(31, 41, 55, 0.04);
  --shadow-hover: 0 16px 36px -4px rgba(31, 41, 55, 0.12), 0 6px 16px -2px rgba(31, 41, 55, 0.06);

  /* Transitions */
  --transition-fast: 0.18s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--cream);
  color: var(--charcoal);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  background-color: var(--cream);
  overflow-x: hidden;
  line-height: 1.6;
}

::selection {
  background: var(--red-light);
  color: var(--red);
}

/* Typography */
h1, h2, h3, .serif-heading {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.15;
  color: var(--charcoal);
  letter-spacing: -0.01em;
}

p {
  color: var(--charcoal-subtle);
  font-size: 1.05rem;
  line-height: 1.65;
}

/* Handwritten Note Style */
.hand-note {
  font-family: var(--font-hand);
  color: var(--red);
  font-size: 1.35rem;
  line-height: 1.25;
  font-weight: 600;
  display: inline-block;
  pointer-events: none;
}

.hand-note.rotate-left { transform: rotate(-3deg); }
.hand-note.rotate-right { transform: rotate(3deg); }

/* SVG Sketchy Arrows */
.sketchy-arrow {
  width: 50px;
  height: 35px;
  overflow: visible;
}

.sketchy-arrow path {
  stroke: var(--red);
  stroke-width: 2.2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ==========================================================================
   PERSISTENT TOP HEADER
   ========================================================================== */
.top-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(248, 245, 238, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(31, 41, 55, 0.08);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
}

.nav-brand {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.15em;
  color: var(--charcoal);
  text-decoration: none;
  white-space: nowrap;
}

.nav-header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Current Active Category Pill Indicator */
.current-category-pill {
  font-size: 0.75rem; /* User specified exact 0.75rem font size */
  font-weight: 700;
  padding: 0.35rem 0.85rem;
  border-radius: 4px;
  border: 1px solid rgba(31, 41, 55, 0.12);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition-fast);
  background: var(--cream-card);
  color: var(--charcoal);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.current-category-pill.hidden {
  display: none;
}

/* Circular Hamburger Icon Button */
.hamburger-btn {
  background: var(--cream-card);
  border: 1px solid rgba(31, 41, 55, 0.15);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
  transition: var(--transition-fast);
  user-select: none;
}

.hamburger-btn:hover {
  background: #fff;
  border-color: var(--charcoal);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  gap: 3.5px;
  width: 18px;
}

.hamburger-icon span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--charcoal);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.hamburger-btn.active .hamburger-icon span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.hamburger-btn.active .hamburger-icon span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active .hamburger-icon span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* Hamburger Menu Drawer */
.hamburger-drawer {
  position: fixed;
  top: calc(var(--nav-height) + 8px);
  right: 1.5rem;
  background: rgba(248, 245, 238, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(31, 41, 55, 0.12);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-width: 250px;
  opacity: 0;
  transform: translateY(-10px) scale(0.95);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.hamburger-drawer.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.drawer-header {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--charcoal-subtle);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(31, 41, 55, 0.08);
}

.drawer-tags-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.drawer-tags-list .tape-tag {
  justify-content: flex-start;
  width: 100%;
  padding: 0.55rem 0.95rem;
  font-size: 0.85rem;
}

/* Tape Badges */
.tape-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.85rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--charcoal);
  text-decoration: none;
  position: relative;
  cursor: pointer;
  border: 1px solid rgba(31, 41, 55, 0.12);
  box-shadow: 0 2px 4px rgba(0,0,0,0.04);
  transition: var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.tape-tag::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 15%;
  width: 22px;
  height: 9px;
  background: var(--tape-gray);
  transform: rotate(-3deg);
  opacity: 0.85;
  pointer-events: none;
}

.tape-tag:hover {
  transform: translateX(4deg);
  box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.tape-tag.active {
  outline: 2px solid var(--charcoal);
  outline-offset: 2px;
  transform: translateX(4deg);
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

/* Category Colors */
.tag-ux { background-color: var(--tag-ux); }
.tag-interaction { background-color: var(--tag-interaction); }
.tag-experience { background-color: var(--tag-experience); }
.tag-product { background-color: var(--tag-product); }
.tag-game { background-color: var(--tag-game); }
.tag-web { background-color: var(--tag-web); }
.tag-hci { background-color: var(--tag-hci); }
.tag-ai { background-color: var(--tag-ai); }

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--charcoal);
  color: var(--cream);
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 4px 14px rgba(31, 41, 55, 0.15);
}

.btn-primary:hover {
  background: #000;
  transform: translateY(-2deg);
  box-shadow: 0 6px 20px rgba(31, 41, 55, 0.22);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--cream-card);
  color: var(--charcoal);
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid rgba(31, 41, 55, 0.2);
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.btn-secondary:hover {
  background: #fff;
  border-color: var(--charcoal);
  transform: translateY(-2deg);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 4rem 1.5rem;
  position: relative;
  text-align: center;
}

.hero-header-box {
  position: relative;
  margin-bottom: 2rem;
}

.hero-note-annotation {
  position: absolute;
  top: -3rem;
  left: -2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transform: rotate(-4deg);
}

.hero-author {
  font-family: var(--font-sans);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--charcoal-subtle);
  margin-bottom: 0.2rem;
}

.hero-title {
  font-size: clamp(3.8rem, 9vw, 7rem);
  font-weight: 500;
  color: var(--charcoal);
  line-height: 1;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--charcoal-subtle);
  margin-top: 1rem;
}

.hero-cta-group {
  margin-top: 2.5rem;
  display: flex;
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .hero-cta-group {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
}

.pdf-button {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background: #fff;
  color: #111;
  border: 1px solid #111;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
}

.pdf-button:hover {
  background: #111;
  color: #fff;
}

/* ==========================================================================
   STORY CONTAINER & ANCHORED STICKY SCROLL LAYOUT
   ========================================================================== */
.story-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 8rem;
  display: flex;
  flex-direction: column;
  gap: 7rem;
}

.story-section {
  position: relative;
  background: var(--cream-card);
  border-radius: var(--radius-lg);
  padding: 3.5rem;
  border: 1px solid rgba(31, 41, 55, 0.08);
  box-shadow: var(--shadow-paper);
  transition: var(--transition-normal);
  scroll-margin-top: calc(var(--nav-height) + 30px);
}

.story-section:hover {
  box-shadow: var(--shadow-hover);
}

/* Section Body Grid */
.section-body-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.15fr;
  gap: 4rem;
  align-items: flex-start;
  position: relative;
}

/* Anchored Sticky Text Column */
.story-text-col {
  position: sticky;
  top: calc(var(--nav-height) + 2.5rem);
  align-self: flex-start;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 10;
}

.story-heading {
  font-size: clamp(2.2rem, 3.8vw, 3.5rem);
  line-height: 1.12;
  color: var(--charcoal);
}

.story-paragraph {
  font-size: 1.08rem;
  line-height: 1.7;
  color: var(--charcoal-subtle);
}

/* Right Column with Scrolling Larger Images */
.images-scroll-col {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  width: 100%;
}

.scroll-image-card {
  position: relative;
  background: var(--cream-light);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  border: 1px solid rgba(31, 41, 55, 0.1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
  cursor: pointer;
  overflow: hidden;
  transition: var(--transition-normal);
}

.scroll-image-card.tilt-left { transform: rotate(-1.5deg); }
.scroll-image-card.tilt-right { transform: rotate(1.5deg); }

.scroll-image-card:hover {
  transform: translateY(-4deg) scale(1.02) rotate(0deg);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
  z-index: 5;
}

.scroll-image-card img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.scroll-image-card .card-caption {
  font-family: var(--font-hand);
  color: var(--red);
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 0.5rem;
  text-align: center;
}

/* Step Items & Stats Table */
.step-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1rem;
}

.step-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.step-num {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content-head {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--charcoal);
  text-transform: uppercase;
}

.step-content-text {
  font-size: 0.95rem;
  color: var(--charcoal-subtle);
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: 0.9rem;
  background: var(--cream-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.stats-table th, .stats-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(31, 41, 55, 0.08);
}

.stats-table th {
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--charcoal);
  background: rgba(31, 41, 55, 0.04);
}

.stats-table tr:last-child td {
  border-bottom: none;
}

.highlight-stat {
  font-weight: 700;
  color: var(--red);
}

.annotation-box {
  background: #FFFBEB;
  border-left: 3px solid #F59E0B;
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 1rem;
}

.annotation-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: #B45309;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.annotation-desc {
  font-size: 0.95rem;
  color: #78350F;
}

/* ==========================================================================
   HIGH-RESOLUTION LIGHTBOX MODAL
   ========================================================================== */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.lightbox-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-header {
  height: 60px;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
}

.lightbox-img-wrapper {
  max-width: 92vw;
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s cubic-bezier(0.1, 1, 0.1, 1);
  transform-origin: center center;
  cursor: grab;
}

.lightbox-img-wrapper:active {
  cursor: grabbing;
}

.lightbox-img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  box-shadow: 0 25px 60px rgba(0,0,0,0.6);
  border-radius: var(--radius-sm);
}

.icon-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 1.1rem;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: scale(1.05);
}

/* Footer */
.footer-section {
  background: var(--cream-light);
  border-top: 1px solid rgba(31, 41, 55, 0.08);
  padding: 6rem 1.5rem 4rem;
  text-align: center;
}

.footer-content {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.footer-thank-you {
  font-family: var(--font-hand);
  font-size: clamp(3.5rem, 7vw, 5.5rem);
  color: var(--charcoal);
  margin-top: 1rem;
  cursor: pointer;
  user-select: none;
  transition: var(--transition-fast);
}

.footer-thank-you:hover {
  transform: scale(1.08) rotate(-2deg);
  color: var(--red);
}

/* ==========================================================================
   JOURNEY AT A GLANCE
   ========================================================================== */

/* Disable index links until the entire page has loaded */
.glance-grid.index-disabled {
  pointer-events: none;
}

.glance-grid.index-disabled .glance-item {
  cursor: default;
}


/* Milestones */

.glance-milestones {
  padding: 1.5rem;
  background: var(--cream-light);
  border-radius: var(--radius-md);
  border: 1px solid rgba(31, 41, 55, 0.08);
  box-shadow: var(--shadow-paper);
}

.milestone-label {
  font-family: var(--font-hand);
  color: var(--red);
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  margin-top: -1rem;
  transform: rotate(-2deg);
}

.milestone-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.milestone {
  padding-bottom: 1rem;
  border-bottom: 1px dashed rgba(31, 41, 55, 0.15);
}

.milestone:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.milestone-year {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--red);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.milestone p {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--charcoal-subtle);
}


.glance-section {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.glance-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--charcoal);
  margin-bottom: 2.5rem;
}

.glance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  width: 100%;
}

.glance-item {
  display: block;
  width: 100%;
  text-decoration: none;
  position: relative;
  transition: transform var(--transition-fast);
}

.glance-item img {
  display: block;
  width: 100%;
  height: auto;
  border: 0;
}

.glance-item:hover {
  transform: translateY(-4px);
}

.glance-item:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 4px;
}

/* Mobile */
@media (max-width: 768px) {
  .glance-section {
    padding: 2rem 1rem;
  }

  .glance-title {
    font-size: 2.2rem;
    margin-bottom: 1.75rem;
  }

  .glance-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

/* Scroll Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive videos across the entire portfolio */
.scroll-video-card {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

.scroll-video-card video {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  box-sizing: border-box;
}

/* Responsive Layout Adjustments */
@media (max-width: 960px) {
  .section-body-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .story-text-col {
    position: static;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .top-navbar {
    padding: 0 1rem;
  }

  .nav-brand {
    font-size: 0.7rem;
  }

  .hero-section {
    padding: 3rem 1rem;
  }

  .story-container {
    padding: 1rem 1rem 5rem;
    gap: 3.5rem;
  }

  .story-section {
    padding: 1.75rem;
    border-radius: var(--radius-md);
  }

  .story-heading {
    font-size: 1.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}