/* ==========================================================================
   Md. Easin Arafat Sani — Portfolio
   Design concept: "The River Route" — Barishal is known as the city of
   rivers. The page is a journey downstream: a hand-drawn waterway runs
   behind the content, a small boat travels it as you scroll, and each
   section is a "ghat" (dock/stop) along the way.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,500&family=Sora:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --cream: #FBF3E7;
  --cream-deep: #F3E7D3;
  --ink: #0E3B36;
  --river: #1C6E8C;
  --river-light: #4FA3C4;
  --marigold: #F2A93B;
  --coral: #E8695F;
  --leaf: #4C9A73;

  --font-display: 'Fraunces', serif;
  --font-body: 'Sora', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --max-w: 1080px;
  --edge: clamp(1.25rem, 4vw, 3rem);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: var(--marigold);
  color: var(--ink);
}

a {
  color: inherit;
}

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

/* ---------- Focus visibility ---------- */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--river);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Texture ---------- */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

/* ---------- River path (signature element) ---------- */
.river-track {
  position: absolute;
  top: 0;
  left: 50%;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.river-track svg {
  position: absolute;
  top: 0;
  left: -1px;
  width: 100%;
  height: 100%;
}

.river-track path {
  fill: none;
  stroke: var(--river);
  stroke-width: 2;
  stroke-dasharray: 6 10;
  stroke-linecap: round;
  opacity: 0.35;
}

.boat-marker {
  position: absolute;
  left: 50%;
  top: 0;
  width: 34px;
  height: 34px;
  transform: translate(-50%, 0);
  z-index: 2;
  transition: top 0.08s linear;
  filter: drop-shadow(0 3px 4px rgba(14, 59, 54, 0.25));
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem var(--edge);
  background: rgba(251, 243, 231, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(14, 59, 54, 0.1);
}

.nav-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.nav-name span {
  color: var(--coral);
}

.nav-links {
  display: flex;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding-bottom: 3px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--marigold);
  transition: width 0.25s ease;
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  width: 100%;
}

.nav-links .mono-tag { display: none; }

/* ---------- Section shell ---------- */
section {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 6rem) var(--edge);
  z-index: 1;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--river);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.eyebrow::before {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--marigold);
}

h2.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  margin: 0 0 2rem;
  letter-spacing: -0.01em;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: clamp(2rem, 6vw, 4rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  width: 100%;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--river);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: 1rem;
  display: inline-block;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05;
  font-weight: 700;
  margin: 0 0 1.1rem;
  letter-spacing: -0.02em;
}

.hero h1 em {
  font-style: italic;
  color: var(--coral);
  font-weight: 500;
}

.hero-tagline {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: rgba(14, 59, 54, 0.78);
  max-width: 42ch;
  margin: 0 0 2rem;
}

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

.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: 2px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--ink);
  color: var(--cream);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(14, 59, 54, 0.25);
}

.btn-ghost {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}

.btn-ghost:hover {
  transform: translateY(-2px);
  background: var(--ink);
  color: var(--cream);
}

.hero-portrait-wrap {
  position: relative;
  justify-self: center;
}

.hero-portrait {
  position: relative;
  width: min(320px, 80vw);
  aspect-ratio: 4/5;
  border-radius: 14px;
  overflow: hidden;
  border: 3px solid var(--ink);
  box-shadow: 10px 10px 0 var(--marigold);
  transform: rotate(-2deg);
  transition: transform 0.4s ease;
}

.hero-portrait:hover {
  transform: rotate(0deg);
}

.hero-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ripple-badge {
  position: absolute;
  bottom: -18px;
  left: -22px;
  background: var(--river);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  box-shadow: 0 6px 14px rgba(28, 110, 140, 0.35);
  animation: bob 3.4s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.scroll-hint {
  position: absolute;
  bottom: 1.5rem;
  left: var(--edge);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--river);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.8;
}

.scroll-hint .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--marigold);
  animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Ghat label ---------- */
.ghat {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin-bottom: 0.4rem;
}

.ghat-mark {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--coral);
  border: 3px solid var(--cream);
  box-shadow: 0 0 0 2px var(--coral);
  flex: none;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.about-text {
  font-size: 1.05rem;
  color: rgba(14, 59, 54, 0.85);
  max-width: 62ch;
}

.about-text strong {
  color: var(--ink);
}

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px dashed rgba(14, 59, 54, 0.25);
}

.stat {
  min-width: 120px;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--river);
  display: block;
}

.stat-label {
  font-size: 0.82rem;
  color: rgba(14, 59, 54, 0.65);
}

/* ---------- Education / timeline ---------- */
.timeline-card {
  background: var(--cream-deep);
  border: 1.5px solid rgba(14, 59, 54, 0.14);
  border-radius: 16px;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
}

.timeline-card::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 169, 59, 0.25), transparent 70%);
}

.timeline-icon {
  font-size: 1.8rem;
  flex: none;
  background: var(--ink);
  color: var(--cream);
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin: 0 0 0.3rem;
}

.timeline-card p {
  margin: 0.2rem 0;
  color: rgba(14, 59, 54, 0.78);
}

.badge {
  display: inline-block;
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--leaf);
  color: var(--cream);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
}

/* ---------- Skills ---------- */
.skills-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.75rem;
}

.skill-group h3 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--river);
  margin: 0 0 1rem;
}

.skill-item {
  margin-bottom: 0.9rem;
}

.skill-item-top {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.skill-item-top .level {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(14, 59, 54, 0.55);
}

.skill-bar {
  height: 7px;
  background: rgba(14, 59, 54, 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--river), var(--leaf));
  width: 0;
  transition: width 1.1s cubic-bezier(0.22, 1, 0.36, 1);
}

.skill-bar-fill.beginner { background: linear-gradient(90deg, var(--marigold), var(--coral)); }

/* ---------- Projects ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.project-card {
  background: var(--cream);
  border: 1.5px solid rgba(14, 59, 54, 0.16);
  border-radius: 16px;
  padding: 1.75rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 30px rgba(14, 59, 54, 0.14);
  border-color: var(--river);
}

.project-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--coral);
  margin-bottom: 0.6rem;
  display: block;
}

.project-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 0 0 0.6rem;
}

.project-card p {
  color: rgba(14, 59, 54, 0.78);
  font-size: 0.95rem;
  margin: 0 0 1rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: rgba(28, 110, 140, 0.1);
  color: var(--river);
  padding: 0.28rem 0.6rem;
  border-radius: 6px;
}

.role-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.1rem;
  font-size: 0.88rem;
  color: rgba(14, 59, 54, 0.75);
}

.role-list li {
  padding-left: 1.1rem;
  position: relative;
  margin-bottom: 0.3rem;
}

.role-list li::before {
  content: '~';
  position: absolute;
  left: 0;
  color: var(--river);
  font-weight: 700;
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1.5px dashed var(--ink);
  padding-bottom: 2px;
}

.project-link.disabled {
  color: rgba(14, 59, 54, 0.4);
  border-color: rgba(14, 59, 54, 0.3);
  cursor: default;
}

/* ---------- Contact ---------- */
.contact-wrap {
  background: var(--ink);
  color: var(--cream);
  border-radius: 24px;
  padding: clamp(2rem, 6vw, 3.5rem);
  position: relative;
  overflow: hidden;
}

.contact-wrap::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 169, 59, 0.18), transparent 70%);
}

.contact-wrap .eyebrow { color: var(--marigold); }

.contact-wrap h2 {
  color: var(--cream);
}

.contact-lead {
  max-width: 48ch;
  color: rgba(251, 243, 231, 0.8);
  margin-bottom: 2.2rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
  position: relative;
  z-index: 1;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  text-decoration: none;
  color: var(--cream);
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid rgba(251, 243, 231, 0.16);
  transition: background 0.25s ease, transform 0.25s ease;
}

.contact-item:hover {
  background: rgba(251, 243, 231, 0.08);
  transform: translateX(4px);
}

.contact-icon {
  font-size: 1.25rem;
  flex: none;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(251, 243, 231, 0.55);
  display: block;
  margin-bottom: 0.2rem;
}

.contact-value {
  font-size: 0.92rem;
  word-break: break-word;
}

/* ---------- Footer ---------- */
footer {
  text-align: center;
  padding: 2.5rem var(--edge) 3rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(14, 59, 54, 0.55);
  position: relative;
  z-index: 1;
}

footer .heart {
  color: var(--coral);
}

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-portrait-wrap { justify-self: start; margin-top: 1rem; }
  .nav-links { gap: 0.9rem; }
  .river-track { display: none; }
}

@media (max-width: 560px) {
  .nav-links a { font-size: 0.8rem; }
  .hero { min-height: auto; padding-bottom: 3rem; }
  .scroll-hint { display: none; }
  .about-grid { gap: 1.25rem; }
  .timeline-card { flex-direction: column; }
}