/* ============================================================
   PORTFOLIO — Smty Pradhan
   Business Strategy & Analytics
   style.css

   Table of Contents:
   01. CSS Variables (Design Tokens)
   02. Reset & Base
   03. Background Texture
   04. Navigation
   05. Buttons
   06. Hero Section
   07. Ticker Strip
   08. Section Commons
   09. Projects Section
   10. Skills Section
   11. About Section
   12. Testimonials Section
   13. AI Chat Section
   14. Contact Section
   15. Footer
   16. Animations
   17. Responsive
   ============================================================ */


/* ──────────────────────────────────────
   01. CSS Variables (Design Tokens)
   ────────────────────────────────────── */
:root {
  /* Dark grey backgrounds · blue accents · white text */
  --white:      #ffffff;   /* pure white for primary text */
  --grey-200:   #2a2a2a;   /* elevated surface */
  --grey-300:   #363636;   /* mid surface / borders */
  --bark:       #1a1a1a;   /* deepest bg — dark grey */
  --bark2:      #222222;   /* card / panel bg */
  --bark3:      #888888;   /* muted secondary text */
  --terra:      #3d7fd4;   /* blue accent — unchanged */
  --terra2:     #5e9fe8;   /* lighter blue hover/accent */
  --forest:     #4a7fa5;   /* steel blue — unchanged */
  --line:       rgba(255, 255, 255, 0.08);
  --line-lt:    rgba(255, 255, 255, 0.04);

  /* Typography */
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-mono:  'JetBrains Mono', monospace;
  --font-sans:  'Space Grotesk', system-ui, sans-serif;
}


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

html { scroll-behavior: smooth; }

body {
  background: var(--cream);
  color: var(--bark);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}


/* ──────────────────────────────────────
   03. Background Texture
   Subtle dot grid — intellectual, editorial feel
   ────────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(var(--line) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: 0;
}

nav, section, footer, .ticker-wrap {
  position: relative;
  z-index: 1;
}


/* ──────────────────────────────────────
   04. Navigation
   ────────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem 3rem;
  background: rgba(248, 244, 239, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--bark);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bark3);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--terra); }

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cream);
  background: var(--bark);
  border: none;
  padding: 0.5rem 1.25rem;
  cursor: pointer;
  transition: background 0.2s;
}

.nav-cta:hover { background: var(--terra); }


/* ──────────────────────────────────────
   05. Buttons
   ────────────────────────────────────── */
.btn-primary {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cream);
  background: var(--bark);
  border: 1px solid var(--bark);
  padding: 0.75rem 2rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background 0.2s, border-color 0.2s;
}

.btn-primary:hover {
  background: var(--terra);
  border-color: var(--terra);
}

.btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bark);
  background: transparent;
  border: 1px solid var(--line);
  padding: 0.75rem 2rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.2s;
}

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


/* ──────────────────────────────────────
   06. Hero Section
   ────────────────────────────────────── */
.hero {
  min-height: 100vh;
  padding: 8rem 3rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-index {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.15em;
  color: var(--bark3);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-index span { color: var(--terra); }

h1.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 5.5vw, 5.2rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--bark);
  margin-bottom: 1.5rem;
}

h1.hero-title em {
  font-style: italic;
  font-weight: 400;
  color: var(--terra);
}

.hero-desc {
  font-size: 1rem;
  font-weight: 300;
  color: var(--bark2);
  max-width: 460px;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

/* KPI Stats Block */
.hero-right {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1.2rem 1.5rem;
  background: var(--cream);
  transition: background 0.2s;
}

.stat-row:hover { background: var(--cream2); }

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bark3);
}

.stat-val {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 600;
  color: var(--bark);
  letter-spacing: -0.02em;
}

.stat-val em {
  font-style: italic;
  font-weight: 400;
  color: var(--terra);
}

.stat-val--status {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--forest);
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.2);
  display: inline-block;
}


/* ──────────────────────────────────────
   07. Ticker Strip
   ────────────────────────────────────── */
.ticker-wrap {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bark);
  padding: 0.6rem 0;
  white-space: nowrap;
}

.ticker-track {
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
  animation: ticker 32s linear infinite;
}

.ticker-track span {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(248, 244, 239, 0.55);
  white-space: nowrap;
}

.ticker-sep {
  color: var(--terra2) !important;
  font-size: 0.6rem !important;
}


/* ──────────────────────────────────────
   08. Section Commons
   ────────────────────────────────────── */
section { padding: 6rem 3rem; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--terra);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::after {
  content: '';
  flex: 1;
  max-width: 40px;
  height: 1px;
  background: var(--terra);
  opacity: 0.45;
}

h2.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 2.9rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

h2.section-title em {
  font-style: italic;
  font-weight: 400;
  color: var(--terra);
}


/* ──────────────────────────────────────
   09. Projects Section
   ────────────────────────────────────── */
#projects { background: var(--cream2); }

.projects-subheading {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: 3rem 0 1.75rem;
}

.projects-subheading span {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--terra);
  white-space: nowrap;
}

.projects-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.projects-year {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  color: var(--bark3);
  letter-spacing: 0.08em;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--line);
}

.project-card {
  background: var(--cream2);
  padding: 2rem;
  transition: background 0.2s;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.project-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--terra);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.3s;
}

.project-card:hover { background: var(--cream); }
.project-card:hover::before { transform: scaleY(1); }

.project-num {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  color: var(--bark3);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.project-title {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  color: var(--bark);
}

.project-desc {
  font-size: 0.87rem;
  font-weight: 300;
  color: var(--bark2);
  line-height: 1.7;
  margin-bottom: 1rem;
  flex: 1;
}

.project-meta-row { margin-bottom: 0.85rem; }

.impact-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--bark);
  color: var(--terra2);
  padding: 0.22rem 0.65rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.59rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.18rem 0.55rem;
  border: 1px solid var(--line);
  color: var(--bark3);
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.08em;
  color: var(--terra);
  text-decoration: none;
  text-transform: uppercase;
  transition: opacity 0.2s;
  margin-top: auto;
}

.project-link:hover { opacity: 0.7; }


/* ──────────────────────────────────────
   10. Skills Section
   ────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.skill-group h3 {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--terra);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}

.skill-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.87rem;
  font-weight: 300;
  color: var(--bark2);
}

.skill-bar-wrap {
  width: 56px;
  height: 2px;
  background: var(--cream3);
}

.skill-bar {
  height: 100%;
  background: var(--bark);
  transform-origin: left;
  transform: scaleX(0);
  animation: grow 1.2s ease forwards;
}


/* ──────────────────────────────────────
   11. About Section
   ────────────────────────────────────── */
.about-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: start;
}

.about-title { margin-bottom: 2rem; }

.about-image-wrap { position: relative; }

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--cream3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 4.5rem;
  font-weight: 600;
  color: var(--bark3);
  letter-spacing: -0.03em;
  position: relative;
  overflow: hidden;
}

/* Warm hatch texture */
.about-image-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 16px,
    rgba(28, 23, 18, 0.035) 16px,
    rgba(28, 23, 18, 0.035) 17px
  );
}

.about-accent-block {
  position: absolute;
  bottom: -1.5rem;
  right: -1.5rem;
  width: 60%;
  height: 60%;
  background: var(--cream2);
  border: 1px solid var(--line);
  z-index: -1;
}

.about-text p {
  color: var(--bark2);
  font-weight: 300;
  line-height: 1.82;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.about-meta {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.meta-item {
  padding: 1rem;
  background: var(--cream);
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bark3);
  margin-bottom: 0.3rem;
}

.meta-val {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--bark);
}


/* ──────────────────────────────────────
   12. Testimonials Section
   ────────────────────────────────────── */
#testimonials { background: var(--cream2); }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--line);
  margin-top: 2.5rem;
}

.testimonial-card {
  background: var(--cream2);
  padding: 1.75rem 2rem;
  transition: background 0.2s;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
}

.testimonial-card:hover { background: var(--cream); }

.testimonial-quote {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-style: italic;
  font-weight: 400;
  line-height: 1.65;
  color: var(--bark2);
}

.testimonial-quote::before { content: '\201C'; }
.testimonial-quote::after  { content: '\201D'; }

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.testimonial-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bark);
  color: var(--terra2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--bark);
}

.testimonial-role {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--bark3);
  margin-top: 0.15rem;
}


/* ──────────────────────────────────────
   13. AI Chat Section
   ────────────────────────────────────── */
#ai-chat {
  background: var(--bark);
  color: var(--cream);
  padding: 6rem 3rem;
}

#ai-chat .section-label { color: var(--terra2); }
#ai-chat .section-label::after { background: var(--terra2); }
#ai-chat h2.section-title { color: var(--cream); }
#ai-chat h2.section-title em { color: var(--terra2); }

.chat-subtitle {
  color: rgba(248, 244, 239, 0.5);
  font-size: 0.9rem;
  font-weight: 300;
  margin-top: 0.5rem;
  margin-bottom: 3rem;
  max-width: 520px;
  line-height: 1.75;
}

.chat-window {
  background: rgba(248, 244, 239, 0.04);
  border: 1px solid rgba(248, 244, 239, 0.1);
  max-width: 760px;
}

.chat-topbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(248, 244, 239, 0.08);
  background: rgba(248, 244, 239, 0.03);
}

.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot-r { background: #b85c38; }
.dot-y { background: #c97d1a; }
.dot-g { background: #2d6a4f; }

.chat-title-bar {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: rgba(248, 244, 239, 0.3);
  text-transform: uppercase;
  margin-left: auto;
}

.chat-messages {
  padding: 1.5rem;
  min-height: 320px;
  max-height: 420px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: rgba(248,244,239,0.12); }

.msg {
  display: flex;
  gap: 0.75rem;
  animation: msg-in 0.3s ease;
}

.msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 2px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.04em;
  font-weight: 500;
  margin-top: 2px;
}

.msg-avatar.user-av { background: var(--cream3); color: var(--bark); }
.msg-avatar.ai-av   { background: var(--terra);  color: var(--cream); }

.msg-bubble { flex: 1; }

.msg-name {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(248, 244, 239, 0.3);
  margin-bottom: 0.3rem;
}

.msg-text {
  font-size: 0.9rem;
  font-weight: 300;
  line-height: 1.65;
  color: rgba(248, 244, 239, 0.8);
}

.msg-text.ai    { color: var(--cream); }
.msg-text.error { color: var(--terra2); opacity: 0.8; }

.typing-indicator {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 2px 0;
}

.typing-indicator span {
  width: 5px; height: 5px;
  background: var(--terra2);
  border-radius: 50%;
  animation: bounce 1.2s ease infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.3s; }

.chat-suggestions {
  padding: 0.75rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-top: 1px solid rgba(248, 244, 239, 0.07);
}

.suggestion-btn {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: rgba(248, 244, 239, 0.45);
  background: rgba(248, 244, 239, 0.04);
  border: 1px solid rgba(248, 244, 239, 0.1);
  padding: 0.3rem 0.75rem;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.suggestion-btn:hover {
  color: var(--cream);
  border-color: rgba(248, 244, 239, 0.28);
  background: rgba(248, 244, 239, 0.07);
}

.chat-input-row {
  display: flex;
  border-top: 1px solid rgba(248, 244, 239, 0.08);
}

#chat-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  padding: 1rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--cream);
  caret-color: var(--terra2);
}

#chat-input::placeholder { color: rgba(248, 244, 239, 0.25); }

#chat-send {
  background: transparent;
  border: none;
  border-left: 1px solid rgba(248, 244, 239, 0.08);
  padding: 0 1.25rem;
  cursor: pointer;
  color: rgba(248, 244, 239, 0.35);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.2s, background 0.2s;
}

#chat-send:hover {
  color: var(--cream);
  background: rgba(248, 244, 239, 0.05);
}

#chat-send:disabled { opacity: 0.3; cursor: not-allowed; }


/* ──────────────────────────────────────
   14. Contact Section
   ────────────────────────────────────── */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: start;
}

.contact-title { margin-bottom: 1rem; }

.contact-intro {
  color: var(--bark2);
  font-weight: 300;
  max-width: 380px;
  line-height: 1.75;
  font-size: 0.95rem;
  margin-bottom: 2.5rem;
}

.contact-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bark3);
}

.contact-item a {
  color: var(--terra);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.77rem;
}

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


/* ──────────────────────────────────────
   15. Footer
   ────────────────────────────────────── */
footer {
  padding: 2rem 3rem;
  border-top: 1px solid var(--line);
  background: var(--cream2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

footer p {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.1em;
  color: var(--bark3);
  text-transform: uppercase;
}


/* ──────────────────────────────────────
   16. Animations
   ────────────────────────────────────── */
@keyframes grow {
  to { transform: scaleX(1); }
}

@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30%           { transform: translateY(-5px); }
}

@keyframes msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.fade-up {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: none;
}


/* ──────────────────────────────────────
   17. Responsive
   ────────────────────────────────────── */
@media (max-width: 768px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; padding: 7rem 1.5rem 3rem; }
  section { padding: 4rem 1.5rem; }
  .about-section   { grid-template-columns: 1fr; gap: 3rem; }
  .contact-section { grid-template-columns: 1fr; gap: 3rem; }
  footer { flex-direction: column; gap: 0.5rem; text-align: center; padding: 1.5rem; }
}