/* ════════════════════════════════════════════════════════════════════════════
   DKD PORTFOLIO — MAIN STYLESHEET
   Modern dark portfolio for product designer — UPI, BBPS, fintech focus
   ════════════════════════════════════════════════════════════════════════════ */

/* ─── FONTS ─────────────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Outfit:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ─── RESET & ROOT ──────────────────────────────────────────────────────────── */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #050505;
  font-family: 'Outfit', sans-serif;
  color: #E0E0E0;
  overflow-x: hidden;
}

::selection {
  background: #2a2a2a;
  color: #f0f0f0;
}

a {
  color: inherit;
}

/* ─── BACKGROUND GRAIN ANIMATION ───────────────────────────────────────────── */
.grain {
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  animation: grain 8s steps(10) infinite;
  pointer-events: none;
  z-index: 100;
  opacity: 0.5;
}

@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  10% { transform: translate(-5%, -10%); }
  30% { transform: translate(3%, 5%); }
  50% { transform: translate(-8%, 2%); }
  70% { transform: translate(8%, -5%); }
  90% { transform: translate(-3%, 8%); }
}

/* ─── NAVIGATION ────────────────────────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 0 48px;
  backdrop-filter: blur(12px);
  background: rgba(5, 5, 5, 0.8);
  border-bottom: 1px solid #111;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.nav-logo {
  font-family: 'DM Serif Display', serif;
  font-size: 20px;
  color: #F0F0F0;
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 13px;
  font-weight: 400;
  text-decoration: none;
  letter-spacing: 0.06em;
  color: #666;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #F0F0F0;
}

.nav-cta {
  font-size: 12px !important;
  font-weight: 500 !important;
  color: #050505 !important;
  background: #E0E0E0;
  padding: 8px 20px;
  border-radius: 100px;
  letter-spacing: 0.04em;
}

/* ─── SCROLL ANIMATIONS ─────────────────────────────────────────────────────── */
.anim {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.anim.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── HERO SECTION ──────────────────────────────────────────────────────────── */
.hero-wrapper {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
}

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 48px 80px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.hero-content {
  position: relative;
  z-index: 2;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-tagline {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: #CCC;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.6);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s;
}

.hero-tagline.loaded {
  opacity: 1;
  transform: translateY(0);
}

.hero-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ADE80;
  box-shadow: 0 0 12px rgba(74, 222, 128, 0.5);
}

.hero h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 400;
  line-height: 1.1;
  color: #FFF;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.35s;
}

.hero h1.loaded {
  opacity: 1;
  transform: translateY(0);
}

.hero h1 em {
  font-style: italic;
  color: #D0D0D0;
}

.hero-meta {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 48px;
  opacity: 0;
  transition: opacity 0.8s ease 0.8s;
}

.hero-meta.loaded {
  opacity: 1;
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hero-meta-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: #999;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.5);
}

.hero-meta-value {
  font-size: 14px;
  font-weight: 400;
  color: #E0E0E0;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.5);
}

.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.4;
  z-index: 3;
}

/* ─── 3D DESIGNER CARD ──────────────────────────────────────────────────────── */
.hero-card-wrap {
  position: relative;
  z-index: 2;
  margin-top: 48px;
  margin-bottom: 16px;
  display: flex;
  justify-content: center;
  opacity: 0;
  transform: translateY(30px);
  transition: all 1s cubic-bezier(0.16, 1, 0.3, 1) 0.7s;
}

.hero-card-wrap.loaded {
  opacity: 1;
  transform: translateY(0);
}

.card-perspective {
  perspective: 1200px;
  width: 420px;
  height: 260px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
}

.card-perspective:hover .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 16px;
  backface-visibility: hidden;
  border: 1px solid #222;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
              0 0 0 1px rgba(255, 255, 255, 0.03) inset;
  background: linear-gradient(135deg, #0a0a0a 0%, #111 40%, #0d1117 100%);
}

.card-back {
  transform: rotateY(180deg);
  text-align: left;
}

.card-front {
  justify-content: space-between;
  padding: 24px 28px;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 8px rgba(74, 222, 128, 0.5);
  }
  50% {
    opacity: 0.6;
    box-shadow: 0 0 16px rgba(74, 222, 128, 0.8);
  }
}

.card-shimmer {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(102, 179, 255, 0.03) 45%,
              rgba(102, 179, 255, 0.06) 50%, rgba(102, 179, 255, 0.03) 55%, transparent 60%);
  background-size: 200% 100%;
  animation: shimmer 6s ease-in-out infinite;
  pointer-events: none;
}

.card-chip-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.card-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: #888;
  text-align: center;
}

.card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.card-label {
  font-family: 'Outfit', sans-serif;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: #444;
  margin-bottom: 4px;
  text-transform: uppercase;
  text-align: left;
}

.card-name {
  font-family: 'DM Serif Display', serif;
  font-size: 16px;
  color: #E0E0E0;
  letter-spacing: 0.02em;
  text-align: left;
}

.card-mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: #888;
}

.card-stripe {
  margin-top: 20px;
  height: 36px;
  width: 100%;
  background: linear-gradient(90deg, #1a1a1a, #252525, #1a1a1a);
}

.card-sig-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-sig-strip {
  flex: 1;
  height: 32px;
  background: linear-gradient(90deg, #1c1c1c, #181818);
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding: 0 12px;
}

.card-sig-text {
  font-family: 'DM Serif Display', serif;
  font-size: 14px;
  font-style: italic;
  color: #aaa;
  letter-spacing: 0.02em;
  text-align: left;
}

.card-cvv-box {
  width: 52px;
  height: 32px;
  background: #e8e8e8;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-cvv-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  color: #111;
  letter-spacing: 0.08em;
}

.card-micro {
  font-family: 'Outfit', sans-serif;
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: #888;
  text-transform: uppercase;
  margin-bottom: 6px;
  text-align: left;
}

.card-fine {
  padding: 10px 20px 0;
  font-family: 'Outfit', sans-serif;
  font-size: 8.5px;
  font-weight: 300;
  line-height: 1.7;
  color: #888;
  text-align: left;
}

.card-back-bottom {
  margin-top: auto;
  padding: 0 20px 16px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.card-service-label {
  font-family: 'Outfit', sans-serif;
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: #777;
  margin-bottom: 3px;
  text-transform: uppercase;
  text-align: left;
}

.card-service-email {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: #aaa;
  text-align: left;
}

.card-otw {
  display: flex;
  align-items: center;
  gap: 6px;
}

.card-otw-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ADE80;
  animation: pulse-dot 2s ease-in-out infinite;
}

.card-otw-text {
  font-family: 'Outfit', sans-serif;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: #777;
}

/* ─── SECTIONS ──────────────────────────────────────────────────────────────── */
.section {
  padding: 100px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 64px;
  border-top: 1px solid #1a1a1a;
  padding-top: 32px;
}

.section-num {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: #444;
  display: block;
  margin-bottom: 16px;
}

.section-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 400;
  color: #F0F0F0;
  margin-bottom: 16px;
}

.section-sub {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.7;
  color: #777;
  max-width: 560px;
}

/* ─── FULL BLEED IMAGE ──────────────────────────────────────────────────────── */
.full-bleed {
  position: relative;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  overflow: hidden;
  max-height: 520px;
  max-width: 1200px;
  margin: 0 auto;
}

.full-bleed img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.full-bleed-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 30%;
  background: linear-gradient(to top, #050505, transparent);
  pointer-events: none;
}

.full-bleed-caption {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 48px 0;
}

.full-bleed-caption span {
  font-size: 13px;
  font-weight: 300;
  font-style: italic;
  letter-spacing: 0.02em;
  color: #555;
}

/* ─── CASE CARDS ────────────────────────────────────────────────────────────── */
.case-card {
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  padding: 40px 40px 32px;
  transition: all 0.4s;
  cursor: pointer;
  margin-bottom: 24px;
}

.case-card:hover {
  border-color: #333;
  background: #0d0d0d;
}

.case-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.case-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.case-tag {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: #666;
  border: 1px solid #222;
  padding: 4px 10px;
  border-radius: 100px;
}

.case-metric {
  background: rgba(74, 222, 128, 0.06);
  border: 1px solid rgba(74, 222, 128, 0.15);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 500;
  color: #4ADE80;
  letter-spacing: 0.02em;
}

.case-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 400;
  color: #F0F0F0;
  margin-bottom: 8px;
}

.case-subtitle {
  font-size: 15px;
  font-weight: 300;
  color: #888;
  font-style: italic;
  margin-bottom: 20px;
}

.case-desc {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
  color: #777;
  max-width: 700px;
  margin-bottom: 28px;
}

.case-decisions {
  border-top: 1px solid #151515;
  padding-top: 20px;
  margin-bottom: 20px;
}

.case-decisions-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: #444;
  display: block;
  margin-bottom: 14px;
}

.case-decision {
  display: flex;
  gap: 14px;
  margin-bottom: 10px;
  align-items: baseline;
}

.case-decision-num {
  font-size: 11px;
  font-weight: 500;
  color: #333;
  flex-shrink: 0;
}

.case-decision-text {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.6;
  color: #999;
}

.case-read {
  font-size: 13px;
  font-weight: 500;
  color: #F0F0F0;
  letter-spacing: 0.02em;
  opacity: 0.5;
  transition: opacity 0.3s;
}

.case-card:hover .case-read {
  opacity: 1;
}

/* ─── METRIC CALLOUT ────────────────────────────────────────────────────────── */
.metric-callout {
  margin-top: 32px;
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  padding: 40px;
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.02), transparent 60%);
}

.metric-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: #555;
  display: block;
  margin-bottom: 20px;
}

.metric-nums {
  display: flex;
  align-items: center;
  margin-bottom: 16px;
}

.metric-from {
  font-family: 'DM Serif Display', serif;
  font-size: 48px;
  color: #555;
}

.metric-to {
  font-family: 'DM Serif Display', serif;
  font-size: 48px;
  color: #4ADE80;
}

.metric-dash {
  width: 40px;
  height: 2px;
  margin: 0 16px;
  opacity: 0.3;
  border-top: 1.5px dashed #666;
}

.metric-desc {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
  color: #777;
  max-width: 500px;
}

/* ─── ARTICLES / WRITING ────────────────────────────────────────────────────── */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.article-card {
  display: flex;
  flex-direction: column;
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  padding: 32px;
  transition: all 0.4s;
  cursor: pointer;
  min-height: 240px;
  text-decoration: none;
}

.article-card:hover {
  border-color: #333;
  background: #0d0d0d;
}

.article-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.article-tag {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: #888;
  border: 1px solid #222;
  padding: 3px 10px;
  border-radius: 100px;
}

.article-date {
  font-size: 12px;
  font-weight: 300;
  color: #555;
}

.article-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 20px;
  font-weight: 400;
  color: #E0E0E0;
  line-height: 1.35;
  margin-bottom: 12px;
}

.article-desc {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.65;
  color: #666;
  flex: 1;
  margin-bottom: 16px;
}

.article-read {
  font-size: 12px;
  font-weight: 500;
  color: #E0E0E0;
  letter-spacing: 0.02em;
  opacity: 0.4;
  transition: opacity 0.3s;
}

.article-card:hover .article-read {
  opacity: 1;
}

/* ─── CAROUSELS ─────────────────────────────────────────────────────────────── */
.carousel-container {
  position: relative;
}

.carousel-scroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: 8px;
}

.carousel-scroll::-webkit-scrollbar {
  display: none;
}

.carousel-card {
  flex-shrink: 0;
  scroll-snap-align: start;
  width: 504px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #1a1a1a;
  background: #0a0a0a;
}

.carousel-card iframe {
  border: none;
  display: block;
  width: 504px;
  height: 399px;
  border-radius: 12px;
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(20, 20, 20, 0.85);
  border: 1px solid #333;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(8px);
}

/* ─── ABOUT SECTION ─────────────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-text {
  font-size: 17px;
  font-weight: 300;
  line-height: 1.8;
  color: #B0B0B0;
  margin-bottom: 24px;
}

.about-muted {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.8;
  color: #666;
  font-style: italic;
}

.about-block {
  border-top: 1px solid #1a1a1a;
  padding-top: 16px;
  margin-bottom: 32px;
}

.about-block-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: #444;
  display: block;
  margin-bottom: 14px;
}

.about-entry {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 12px;
}

.about-entry-title {
  font-size: 14px;
  font-weight: 400;
  color: #C0C0C0;
}

.about-entry-meta {
  font-size: 13px;
  font-weight: 300;
  color: #555;
}

.about-link {
  font-size: 14px;
  font-weight: 400;
  color: #888;
  text-decoration: none;
  display: block;
  margin-bottom: 6px;
  transition: color 0.3s;
}

.about-link:hover {
  color: #E0E0E0;
}

/* ─── FOOTER ────────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid #111;
  padding: 32px 48px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-text {
  font-size: 12px;
  font-weight: 300;
  color: #444;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 12px;
  font-weight: 400;
  color: #555;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: #E0E0E0;
}

/* ════════════════════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ════════════════════════════════════════════════════════════════════════════ */

/* ─── TABLET ────────────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .card-perspective {
    width: 380px;
    height: 240px;
  }
}

/* ─── MOBILE ────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  nav {
    padding: 0 20px;
  }

  .nav-links {
    gap: 16px;
  }

  .nav-cta {
    display: none;
  }

  .hero {
    padding: 100px 20px 60px;
  }

  .hero-meta {
    gap: 24px;
  }

  .hero-card-wrap {
    margin-top: 40px;
    margin-bottom: 12px;
  }

  .card-perspective {
    width: 360px;
    height: 228px;
  }

  .section {
    padding: 60px 20px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .full-bleed-caption {
    padding: 12px 20px 0;
  }

  .carousel-card {
    width: 320px;
  }

  .carousel-card iframe {
    width: 320px;
    height: 253px;
  }
}

/* ─── SMALL MOBILE ──────────────────────────────────────────────────────────── */
@media (max-width: 400px) {
  .card-perspective {
    width: 320px;
    height: 200px;
  }

  .card-number {
    font-size: 13px;
  }

  .card-name {
    font-size: 14px;
  }

  .card-front {
    padding: 20px 22px;
  }
}