/* ════════════════════════════════
   FONTS
════════════════════════════════ */

@font-face {
  font-display: swap;
  font-family: 'Space Grotesk';
  font-style: normal;
  font-weight: 500;
  src: url('assets/fonts/space-grotesk-v22-latin-500.woff2') format('woff2');
}

@font-face {
  font-display: swap;
  font-family: 'Space Grotesk';
  font-style: normal;
  font-weight: 700;
  src: url('assets/fonts/space-grotesk-v22-latin-700.woff2') format('woff2');
}

/* ════════════════════════════════
   CSS RESET
════════════════════════════════ */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

#mainContent, :root {
  transition: background-color 0.3s ease, background 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* ════════════════════════════════
  GLOBAL STYLES
════════════════════════════════ */

/* ════════════════════════════════
COLOR SYSTEM - COMPLETE TOKENIZATION
═════════════════════════════════ */

:root {
  /* ── PRIMITIVE PALETTE ── */
  --palette-mint: #00B48A;
  --palette-mint-hover: #00C99A;
  --palette-error: #FF6B6B;
  --palette-code-string: #CE9178;
  --palette-dot-red: #FF5F57;
  --palette-dot-yellow: #FFBD2E;

  -webkit-font-smoothing: subpixel-antialiased;
  text-rendering: geometricPrecision;
  
  /* ── SEMANTIC TOKENS: DARK MODE (DEFAULT) ── */
  /* Backgrounds */
  --bg: #151515;
  --surface: var(--section-border);
  --header-bg: rgba(21, 21, 21, 0.85); 
  --dark-grey: #242424;
  --card-bg: var(--section-border);
  --edu-block-bg: #1a1a1a;
  --bg-overlay: rgba(0, 0, 0, 0.82); /*project overlay*/
  --header-glass: var(--header-bg); /*primary header before*/
  
  /* Text Colors */
  --white: #FFFFFF;
  --grey: #D9D9D9;
  --code-text: #cccccc;
  --keyword: #777777;
  --string: #CE9178;
  --placeholder: #555555;
  --footer-brand-text: #555555;
  --footer-copy: #444;
  --preview-label: #555555;
  --hero-text: var(--white);

  /* ─ BORDERS & DIVIDERS (Fixed) ── */
  --border:       #2a2a2a;  /* Cards, inputs, overlays, general */
  --border-dark:  #222;     /* Footers, section dividers */
  --nav-border:   #2e2e2e;  /* Mobile nav list separators */
  --footer-border:#222;     /* Footer top border */
  --section-border:#1e1e1e; /* Case study tools top border */
  
  /* Decorative Elements */
  --sym-color: var(--white);
  --sym-opacity: 0.06;
  --dot-grid-opacity: 0.03;
  
  /* Shadows & Glows */
  --shadow-color: rgba(0, 0, 0, 0.4);
  --glow-color: rgba(0, 180, 138, 0.5);
  --btn-shadow: rgba(0, 0, 0, 0.35);
  
  /* Form Elements */
  --input-bg: #242424;
  --input-border: var(--border);
  --select-arrow: #00B48A;
  
  /* Availability Badge */
  --badge-bg: #FFFFFF;
  --badge-text: #111111;
  
  /* Loader Controls */
  --loader-controls-bg: rgba(0, 0, 0, 0.15);
  --loader-btn-bg: transparent;
  --loader-btn-border: var(--border);
  --loader-btn-text: #cccccc;
  --loader-btn-hover-bg: rgba(0, 180, 138, 0.05);
  
  /* Accents & States */
  --mint: var(--palette-mint);
  --error: var(--palette-error);
  --success-bg: rgba(0, 180, 138, 0.06);
  --success-border: rgba(0, 180, 138, 0.25);
  --error-bg: rgba(255, 107, 107, 0.06);
  --error-border: rgba(255, 107, 107, 0.25);
  
  /* Typography */
  --ff-body: 'Space Grotesk', sans-serif;
  --font-main: 'Space Grotesk', sans-serif;
  --font-mono: 'Courier New', monospace;
  --fw-medium: 500;
  --fw-bold: 700;
  
  /* Transitions */
  --ease: 0.2s ease;
  --ease-long: 0.6s ease;
}

/* ══════════════════
LIGHT THEME OVERRIDE
═══════════════════ */

[data-theme="light"] {
  /*Force light bg to cover viewport on reveal*/
  background: #F5F5F5;

  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;

  .project-name, .overlay-btn {
    color: #FFFFFF;
  }

  /* Backgrounds - Inverted */
  --bg: #F5F5F5;
  --surface: #EFEFEF;
  --header-bg: rgba(245, 245, 245, 0.90);
  --dark-grey: #E8E8E8;
  --card-bg: #FFFFFF;
  --edu-block-bg: #EFEFEF;
  --overlay-bg: #E8E8E8;
  --bg-overlay: rgba(0, 0, 0, 0.82);
  --header-glass: rgba(245, 245, 245, 0.85);
  
  /* Text Colors - Inverted */
  --white: #151515;
  --grey: #444;
  --placeholder: #9CA3AF;
  --footer-copy: #6B7280;
  --preview-label: #9CA3AF;
  --hero-text: var(--white);
  
  /* Borders - Lighter */
  --border: #D0D0D0;
  --border-dark: #CCCCCC;
  --nav-border: #D1D5DB;
  --footer-border: #E5E7EB;
  --section-border: #DCDCDC;
  
  /* Decorative Elements */
  --sym-color: #151515;
  --sym-opacity: 0.25;
  --dot-grid-opacity: 0.05;
  --icon-filter: invert(1);
  --text-on-accent: #FFFFFF;   /* White text on mint button */
  --mint-hover: #00C99A;       /* Lighter mint for hover */
  
  /* Shadows & Glows - Softer */
  --shadow-color: rgba(0, 0, 0, 0.8);
  --shadow-card: rgba(0, 0, 0, 0.12);
  --glow-color: rgba(0, 180, 138, 0.25);
  --btn-shadow: rgba(0, 0, 0, 0.1);
  
  /* Form Elements */
  --input-bg: #E8E8E8;
  --input-border: #D0D0D0;
  --select-arrow: #00B48A;
  
  /* Availability Badge - Darker for contrast */
  --badge-bg: #151515;
  --badge-text: #FFFFFF;
  
  /* States - Adjusted for light bg */
  --success-bg: rgba(0, 180, 138, 0.08);
  --success-border: rgba(0, 180, 138, 0.2);
  --error-bg: rgba(229, 62, 62, 0.08);
  --error-border: rgba(229, 62, 62, 0.2);
  
  /* Keep mint accent the same */
  --mint: var(--palette-mint);
  --error: var(--palette-error);

  .edu-m4 {
    opacity: 0.15;
  }

  .fm-icon {
    opacity: 0.6;
    filter: brightness(0.04);
  }

  .social-sidebar::after {
    opacity: 0.6;
  }
}

body {
  background-color: var(--bg);
  font-family: var(--ff-body);
  color: var(--white);
  min-height: 100vh;
  position: relative;
}

body:has(#entryScreen:not(.hidden)),
body:has(#loader:not(.hidden)) {
  overflow: hidden;
}

.transition-orb {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  border-radius: 50%;
  transform: scale(0);
  transform-origin: center;
  pointer-events: none;
}

.theme-wipe {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: var(--bg);
  clip-path: inset(0% 0 100% 0);
  transition: clip-path 700ms cubic-bezier(0.86, 0, 0.07, 1);
}
.theme-wipe.wipe-in  { clip-path: inset(0% 0 0%   0); }
.theme-wipe.wipe-out { clip-path: inset(0% 0 100% 0); }


/* ════════════════════════════════
   FULL PAGE BACKGROUND DECORATIONS
════════════════════════════════ */

.bg-dot-grid {
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, var(--mint) 1px, transparent 1px);
  background-size: 36px 36px;
  opacity: var(--dot-grid-opacity);
  pointer-events: none;
  z-index: 0;
}

.bg-sym {
  position: fixed;
  pointer-events: none;
  user-select: none;
  font-family: monospace;
  font-weight: 700;
  color: var(--mint);
  line-height: 1;
  z-index: 0;
}

/* mobile sizes */
.bg-sym-1 { font-size: 7rem;  opacity: 0.04; top: -2rem;   left: -1rem; }
.bg-sym-2 { font-size: 4rem;  opacity: 0.03; top: 15%;     right: 3%;   }
.bg-sym-3 { font-size: 5rem;  opacity: 0.04; top: 45%;     left: 3%;    }
.bg-sym-4 { font-size: 5rem;  opacity: 0.03; bottom: 10%;  right: 8%;   }
.bg-sym-5 { font-size: 4rem;  opacity: 0.04; bottom: 25%;  left: 35%;   }
.bg-sym-6 { font-size: 6rem;  opacity: 0.03; top: 68%;     left: 12%;   }

/* desktop sizes */
@media (min-width: 1024px) {
  .bg-sym-1 { font-size: 12rem; }
  .bg-sym-2 { font-size: 7rem;  }
  .bg-sym-4 { font-size: 9rem;  }
}


/* ════════════════════════════════
  LOADER & ENTRY SYSTEM
═════════════════════════════════ */
   
/* ─ STATE UTILITIES ── */

/* Entry Screen */
.entry-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  z-index: 2000;
}

#enterBtn {
  padding: 1rem 2rem;
  background: var(--mint);
  color: var(--bg);
  border: none;
  border-radius: 6px;
  font-weight: var(--fw-bold);
  cursor: pointer;
  font-size: 1.2rem;
  font-family: var(--ff-body);
  position: relative;
  z-index: 1;
  transition: transform 0.2s, opacity 0.2s, box-shadow 0.2s;
}

/* ── IDLE GLOW LAYER ── */
#enterBtn::after {
  content: "";
  position: absolute;
  inset: -6px;
  background: rgba(0, 180, 138, 0.5);
  filter: blur(16px);
  border-radius: inherit;
  z-index: -1;
  opacity: 0.35;
  animation: btnGlowPulse 2.5s ease-in-out infinite;
}

/* ── HOVER STATE ── */
#enterBtn:hover {
  transform: translateY(-2px);
  opacity: 0.95;
  box-shadow:
    0 8px 20px rgba(0, 0, 0, 0.35),
    0 0 18px rgba(0, 180, 138, 0.45);
}

/* ── GLOW ANIMATION ── */
@keyframes btnGlowPulse {
  0%, 100% {
    opacity: 0.2;
    transform: scale(0.98);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.05);
  }
}

/* Loader Overlay */
.loader-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  z-index: 1000;
}

/* Code Window */
.loader-window {
  width: 90%;
  max-width: 500px;
  background: var(--surface); /* Slightly darker than --dark-grey for glass depth */
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  animation: loaderFadeIn 0.6s ease-out;
}
@keyframes loaderFadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.window-header {
  display: flex;
  gap: 6px;
  padding: 12px;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
}
/* Scoped dots to avoid conflict with availability badge */
.win-dot { width: 10px; height: 10px; border-radius: 50%; }
.win-dot.red    { background: #ff5f57; }
.win-dot.yellow { background: #ffbd2e; }
.win-dot.green  { background: var(--mint); }

/* Code Block */
.code-block {
  padding: 24px;
  font-family: var(--font-mono);
  line-height: 1.8;
  font-size: 0.95rem;
  color: var(--code-text);
}
.keyword  { color: var(--keyword); }
.variable { color: var(--mint); }
.value    { color: var(--string); }

/* Typing Cursor (reuses your existing @keyframes blink) */
.value.typing::after {
  content: "|";
  color: var(--mint);
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}

/* Loading Status Comment */
.loader-status {
  color: var(--mint);
  font-style: italic;
  margin-top: 8px;
  display: block;
}
.loader-status .dots {
  display: inline-block;
  min-width: 1.5em;
  animation: pulse-dots 1.2s ease-in-out infinite;
}
@keyframes pulse-dots {
  0%, 100% { opacity: 0.4; }
  50%      { opacity: 1; }
}
.loader-status.loaded  .status-text { color: var(--mint); }
.loader-status.loaded .dots { display: none; }

/* Controls */
.loader-controls {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.15);
}
.loader-controls button {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border);
  color: #ccc;
  padding: 8px;
  cursor: pointer;
  border-radius: 4px;
  font-family: var(--ff-body);
  font-weight: var(--fw-medium);
  transition: all 0.2s;
}
.loader-controls button:hover {
  border-color: var(--mint);
  color: var(--mint);
  background: rgba(0, 180, 138, 0.05);
}

html[data-skip-loader="true"] #loader,
html[data-skip-loader="true"] #entryScreen,
html[data-skip-entry="true"] #entryScreen {
  display: none;
}


/* Main Content Reveal */
.main-content {
  min-height: 100vh;
  opacity: 0;
  transition: opacity var(--ease-long);
  pointer-events: none; /* Prevents clicks before fade-in */
  z-index: 300;
}
.main-content.show {
  opacity: 1;
  pointer-events: auto;
}

.hidden {
  display: none;
}

/* ── BASE ── */
html { scroll-behavior: smooth; }

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in.d1 { transition-delay: 0.1s; }
.fade-in.d2 { transition-delay: 0.2s; }
.fade-in.d3 { transition-delay: 0.3s; }

@media (hover: hover) {
  .theme-btn:hover {
    color: var(--mint);
  }

  .primary-nav a:hover { color: var(--white); }

  .social-sidebar a:hover {
    opacity: 1;
    transform: translateY(-2px);
  }

  .hero-cta:hover {
    color: var(--mint);
    letter-spacing: 0.25em;
  }
  .social-inline a:hover { opacity: 1; }

  .cv-btn:hover {
    color: var(--mint);
    letter-spacing: 0.25em;
  }

  .footer-social-icons a:hover {
    opacity: 1;
    transform: translateY(-2px);
  }
}


/* ════════════════════════════════
   FIXED HEADER
════════════════════════════════ */

.primary-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 400;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
}

.primary-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--header-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: -1;
}
 
@media (min-width: 1024px) {
  .primary-header {
    padding: 1.5rem 3rem;
  }
}

.logo {
  font-size: 1.4rem;
  font-weight: var(--fw-bold);
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.02em;
  z-index: 400;
}

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

.theme-btn {
  color: var(--white);
  background: transparent;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 0.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}


@media (min-width: 768px) {
  .primary-header nav {
    margin-inline-end: 1.5rem;
  }

  .right .theme-btn {
    margin-inline-end: 0.5rem;
  }
}

/* ── nav toggle (hamburger) ── */
.nav-toggle {
  display: flex;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  z-index: 400;
}

.bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
  transform-origin: center;
}

.nav-toggle.open .bar:nth-child(1) { transform: translateY(0.4375rem) rotate(45deg); }
.nav-toggle.open .bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open .bar:nth-child(3) { transform: translateY(-0.4375rem) rotate(-45deg); }

/* ── primary nav — mobile overlay ── */
.primary-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100svh;
  background: var(--dark-grey);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  translate: 100% 0;
  transition: translate 0.3s ease;
  padding: 6rem 1.5rem;
  z-index: 300;
}

.primary-nav ul {
  width: 100%;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-block-start: 2rem;
}

.primary-nav a {
  text-decoration: none;
  font-size: clamp(1.2rem, 1.5vw, 2rem);
  font-weight: var(--fw-medium);
  color: var(--white);
  display: flex;
  flex-direction: row;
  align-items: center;
  transition: color 0.2s;
  -webkit-tap-highlight-color: transparent;
  width: 100%;
  padding-block: 0.5rem;
}

.primary-nav a::after { display: none; }

.primary-nav.is-open { translate: 0 0; }

.primary-nav .cv-btn { display: none; }

.primary-nav .cv-nav-btn {
  display: inline-flex;
  flex-direction: row;
  align-self: center;
  justify-content: center;
  gap: 0.5rem;
  width: auto;
  margin-top: 2rem;
}

/* Staggered Entrance Animation for Nav Links */

@media (max-width: 767px) {
  .primary-nav ul li {
    border-top: 1px solid var(--nav-border);
    padding: 1rem 0;
  }

  .primary-nav ul li:last-child {
    border-bottom: 1px solid var(--nav-border);
  }

  .primary-nav ul li,
  .primary-nav .cv-nav-btn {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .primary-nav.is-open ul li:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0.15s; }
  .primary-nav.is-open ul li:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 0.25s; }
  .primary-nav.is-open ul li:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 0.35s; }
  .primary-nav.is-open ul li:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 0.45s; }
  .primary-nav.is-open ul li:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 0.55s; }
  .primary-nav.is-open .cv-nav-btn        { opacity: 1; transform: translateY(0); transition-delay: 0.65s; }
}


/* ── desktop nav ── */
@media (min-width: 768px) {
  .nav-toggle { display: none; }

  .primary-nav {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    flex-direction: row;
    align-items: center;
    translate: 0 0;
    padding: 0;
    z-index: 400;
  }

  .primary-nav ul {
    flex-direction: row;
    gap: 2rem;
    margin-block-start: 0;
    width: auto;
    z-index: 400;
  }

  .primary-nav ul li {
    border: none;
    padding: 0;
  }

  .primary-nav ul li:last-child {
    border-bottom: none;
  }
  
  .primary-nav a {
    display: inline-block;
    color: var(--grey);
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    width: auto;
    padding-block: 0;
    position: relative;
  }

  .primary-nav a::after {
    display: block;
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--mint);
    transition: width 0.2s;
  }

  .primary-nav a:hover::after { width: 100%; }

  .primary-nav a.active {
    color: var(--white);
  }

  .primary-nav a.active::after {
    width: 100%;
  }

  .primary-nav .cv-nav-btn { display: none; }
  .primary-nav .cv-btn { display: none; }
}

/* ════════════════════════════════
   FIXED SOCIAL SIDEBAR
════════════════════════════════ */

/* hidden on mobile and tablet */
.social-sidebar { display: none; }

@media (min-width: 1024px) {
  .social-sidebar {
    position: fixed;
    left: 1.75rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    z-index: 50;
  }

  .social-sidebar::after {
    content: '';
    width: 1px;
    height: 56px;
    background: var(--grey);
    opacity: 0.25;
    margin-top: 0.25rem;
  }

  .social-sidebar a {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.55;
    transition: opacity 0.2s, transform 0.2s;
  }

  .social-sidebar a svg {
    width: 24px;
    height: 24px;
    fill: var(--white);
  }
}

/* ════════════════════════════════
   HERO SECTION
════════════════════════════════ */

.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 7rem 1.5rem 3rem;
  gap: 2rem;
  text-align: center;
}

@media (min-width: 768px) {
  .hero {
    grid-template-columns: 1fr 1fr;
    padding: 7rem 2rem 4rem 4rem;
    text-align: left;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 8rem 2rem 4rem 5rem;
    gap: 3rem;
  }
}

/* ── hero text ── */
.hero-text h1 {
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  font-weight: var(--fw-bold);
  line-height: 1.05;
  margin-bottom: 1.5rem;
  color: var(--hero-text);
}

.hero-text h1 .underline {
  border-bottom: 3px solid var(--mint);
  padding-bottom: 3px;
}

.cursor {
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background: var(--mint);
  margin-left: 3px;
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.hero-text p {
  color: var(--grey);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

@media (min-width: 1024px) {
  .hero-text p { max-width: 380px; }
}

.role {
  color: var(--mint);
  font-size: 1.15rem;
  font-weight: var(--fw-bold);
}

.hero-cta-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}

@media (min-width: 768px) {
  .hero-cta-wrapper {
    flex-direction: row;
    align-items: center;
  }
}

.hero-cta {
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.8rem;
  font-weight: var(--fw-bold);
  border-bottom: 2px solid var(--mint);
  padding-bottom: 6px;
  transition: color 0.2s, letter-spacing 0.2s;
}

/* ── social inline (mobile + tablet) ── */
.social-inline {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

@media (min-width: 768px) {
  .social-inline { justify-content: flex-start; }
}

@media (min-width: 1024px) {
  .social-inline { display: none; }
}

.social-inline a {
  opacity: 0.6;
  transition: opacity 0.2s;
}

.social-inline a svg {
  width: 24px;
  height: 24px;
  fill: var(--white);
}

.socials a {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: calc(var(--i) * 120ms);
}

.socials.reveal a {
  opacity: 1;
  transform: translateY(0);
}

/* ── hero photo ── */
.hero-photo {
  display: flex;
  justify-content: center;
  align-items: center;
  order: -1;
}

@media (min-width: 768px) {
  .hero-photo {
    justify-content: flex-end;
    order: 0;
  }
}

.profile-img {
  width: 240px;
  height: 260px;
  border: 0.0625rem solid var(--grey);
  box-shadow: 0 0 5px var(--mint), 0 0 10px var(--mint), 0 0 20px rgba(0, 255, 170, 0.3);
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--footer-copy);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  animation: glow 3s ease-in-out infinite alternate;
}

@media (min-width: 768px) {
  .profile-img {
    width: 280px;
    height: 360px;
  }
}

@media (min-width: 1024px) {
  .profile-img {
    width: 370px;
    height: 380px;
  }
}

@keyframes glow {
  from {
    box-shadow:
      0 0 5px var(--mint),
      0 0 10px var(--mint);
  }
  to {
    box-shadow:
      0 0 15px var(--mint),
      0 0 25px var(--mint),
      0 0 45px var(--mint);
  }
}

/* ── availability badge on photo ── */
.photo-wrap {
  position: relative;
  display: inline-block;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .photo-wrap { margin-bottom: 0; }
}

.available-badge {
  position: absolute;
  bottom: -1rem;
  right: -2.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.82rem;
  font-weight: var(--fw-bold);
  padding: 0.5rem 1rem;
  border-radius: 100px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  white-space: nowrap;
  z-index: 10;
}

@media (min-width: 768px) and (max-width: 1023px) {
  .available-badge {
    bottom: auto;
    right: auto;
    top: -1rem;
    left: 50%;
    transform: translateX(-50%);
  }
}

.available-badge .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--palette-mint);
  animation: pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

/* ════════════════════════════════
   ABOUT SECTION
════════════════════════════════ */

.about {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

@media (min-width: 768px) {
  .about { padding: 5rem 2rem 5rem 4rem; }
}

@media (min-width: 1024px) {
  .about { padding: 6rem 2rem 6rem 5rem; }
}

.section-label {
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--mint);
  margin-bottom: 1.25rem;
}

.about-statement {
  font-size: 1.4rem;
  font-weight: var(--fw-bold);
  line-height: 1.2;
  max-width: 820px;
  margin-bottom: 2.5rem;
  color: var(--white);
}

@media (min-width: 1024px) {
  .about-statement {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    margin-bottom: 4rem;
  }
}

.about-statement span { color: var(--mint); }

.about-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin-bottom: 4rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

.about-bio p {
  color: var(--grey);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

/* education block */
.education-block {
  position: relative;
  margin-top: 2.5rem;
  padding: 1.5rem 1.5rem 1.5rem 1.75rem;
  border-left: 2px solid var(--mint);
  background: var(--edu-block-bg);
  border-radius: 0 6px 6px 0;
}

.edu-math-sym {
  position: absolute;
  pointer-events: none;
  user-select: none;
  font-family: 'Georgia', serif;
  color: var(--sym-color);
  opacity: var(--sym-opacity);
  line-height: 1;
}

.edu-m1 { font-size: 5rem; top: -0.5rem;   right: 1rem;  }
.edu-m2 { font-size: 3rem; bottom: 0.5rem;  right: 5rem;  }
.edu-m3 { font-size: 2rem; top: 1rem;       right: 7rem;  }
.edu-m4 { font-size: 4rem; bottom: -0.5rem; right: 0.5rem; opacity: 0.04;}

@media (max-width: 768px) {
  .edu-m3 {
    right: 5.5rem;
  }
}

.education-block h4 {
  font-size: 1rem;
  font-weight: var(--fw-bold);
  color: var(--white);
  margin-bottom: 0.35rem;
}

.education-block .edu-school {
  font-size: 0.85rem;
  color: var(--grey);
  margin-bottom: 0.2rem;
}

.education-block .edu-year {
  font-size: 0.8rem;
  color: var(--mint);
  font-weight: var(--fw-medium);
}

/* right col */
.about-stack h3 {
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 1rem;
}

.stack-group { margin-bottom: 2rem; }

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.stack-tag {
  font-size: 0.8rem;
  font-weight: var(--fw-medium);
  color: var(--white);
  background: var(--dark-grey);
  border: 1px solid var(--nav-border);
  border-radius: 4px;
  padding: 0.35rem 0.75rem;
  letter-spacing: 0.03em;
}

.stack-tag.learning {
  border-color: var(--mint);
  color: var(--mint);
  background: transparent;
}

/* CV button */
.cv-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.78rem;
  font-weight: var(--fw-bold);
  border-bottom: 2px solid var(--mint);
  padding-bottom: 6px;
  transition: color 0.2s, letter-spacing 0.2s;
}

.cv-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
  flex-shrink: 0;
}

/* ════════════════════════════════
   EXPERTISE SECTION
════════════════════════════════ */

.expertise {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

@media (min-width: 768px) {
  .expertise { padding: 5rem 2rem 5rem 4rem; }
}

@media (min-width: 1024px) {
  .expertise { padding: 6rem 2rem 6rem 5rem; }
}

.expertise-header { margin-bottom: 3.5rem; }

.expertise-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-bold);
  color: var(--white);
  margin-top: 0.75rem;
}

.expertise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .expertise-grid { grid-template-columns: 1fr 1fr 1fr; }
}

@media (min-width: 1024px) {
  .expertise-grid { grid-template-columns: 1fr 1fr; }
}

.expertise-card {
  background: var(--dark-grey);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s;
}

.expertise-card:hover {
  border-color: var(--mint);
  transform: translateY(-3px);
}

.expertise-card::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 1px solid var(--mint);
  opacity: 0.08;
  transition: opacity 0.25s;
}

.expertise-card:hover::before { opacity: 0.18; }

.expertise-card::after {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 1px solid var(--mint);
  opacity: 0.04;
}

.card-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1.25rem;
}

.card-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: var(--mint);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.expertise-card h3 {
  font-size: 1rem;
  font-weight: var(--fw-bold);
  color: var(--white);
  margin-bottom: 0.75rem;
}

.expertise-card p {
  font-size: 0.88rem;
  color: var(--grey);
  line-height: 1.75;
}

/* ════════════════════════════════
   PROJECTS SECTION
════════════════════════════════ */

.projects {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

@media (min-width: 768px) {
  .projects { padding: 5rem 2rem 5rem 4rem; }
}

@media (min-width: 1024px) {
  .projects { padding: 6rem 2rem 6rem 5rem; }
}

.projects-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .projects-header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.projects-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-bold);
  color: var(--white);
  margin-top: 0.75rem;
}

.projects-header a {
    display: inline-block;
    color: var(--white);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.78rem;
    font-weight: var(--fw-bold);
    border-bottom: 2px solid var(--mint);
    padding-bottom: 5px;
    white-space: nowrap;
    transition: color 0.2s;
    margin-bottom: 0.5rem;
}

.projects-header a:hover { color: var(--mint); }

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

@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

.project-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: var(--dark-grey);
  cursor: pointer;
}

.project-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

@media (min-width: 1024px) {
  .project-card img { height: 220px; }
}

.project-card:hover img { transform: scale(1.04); }

/* mobile card info — always visible */
.project-mobile-info {
  display: block;
  padding: 1rem 1rem 0.25rem;
}

.project-mobile-info h3 {
  font-size: 0.95rem;
  font-weight: var(--fw-bold);
  color: var(--white);
  margin-bottom: 0.35rem;
}

.project-mobile-info .project-tags { margin-bottom: 0; }

.project-mobile-footer {
  display: flex;
  padding: 0.75rem 1rem 1rem;
  gap: 0.75rem;
}

/* desktop overlay — hidden by default */
.project-overlay {
  display: none;
}

@media (min-width: 768px) {
  /* hide mobile info on tablet+ */
  .project-mobile-info  { display: none; }
  .project-mobile-footer { display: none; }

  /* show desktop overlay */
  .project-overlay {
    display: flex;
    position: absolute;
    inset: 0;
    background: var(--bg-overlay);
    opacity: 0;
    transition: opacity 0.3s ease;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.25rem;
  }

  .project-card:hover .project-overlay { opacity: 1; }
}

.overlay-bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.project-name {
  font-size: 1rem;
  font-weight: var(--fw-bold);
  color: var(--white);
  line-height: 1.3;
  max-width: 65%;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.project-tag {
  font-size: 0.7rem;
  color: var(--mint);
  font-weight: var(--fw-medium);
  letter-spacing: 0.05em;
}

.overlay-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-end;
  flex-shrink: 0;
}

.overlay-btn {
  display: inline-block;
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.68rem;
  font-weight: var(--fw-bold);
  border-bottom: 1px solid var(--mint);
  padding-bottom: 3px;
  white-space: nowrap;
  transition: color 0.2s;
}

.overlay-btn:hover { color: var(--mint); }

.mobile-btn {
  display: inline-block;
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.7rem;
  font-weight: var(--fw-bold);
  border-bottom: 1px solid var(--mint);
  padding-bottom: 3px;
  transition: color 0.2s;
}

.mobile-btn:hover { color: var(--mint); }

/* ════════════════════════════════
   CONTACT SECTION
════════════════════════════════ */

.contact {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

@media (min-width: 768px) {
  .contact { padding: 5rem 2rem 5rem 4rem; }
}

@media (min-width: 1024px) {
  .contact { padding: 6rem 2rem 6rem 5rem; }
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

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

@media (min-width: 1024px) {
  .contact-grid {
    gap: 5rem;
  }
}

.contact-left h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-bold);
  color: var(--white);
  margin-top: 0.75rem;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.contact-left p {
  color: var(--grey);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 2.5rem;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: var(--grey);
  font-size: 0.9rem;
}

.contact-detail svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--mint);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.contact-detail a {
  color: var(--grey);
  text-decoration: none;
  transition: color 0.2s;
}

.contact-detail a:hover { color: var(--mint); }

.contact-mail {
  cursor: text;
  user-select: text;
}

.contact-address {
  display: flex;
  flex-direction: column;
}

.remote-tag {
  font-size: 0.78rem;
  color: var(--mint);
  margin-top: 0.25rem;
}

.availability {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: var(--fw-medium);
  color: var(--grey);
  background: var(--dark-grey);
}

.availability .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.85); }
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.75rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--dark-grey);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  color: var(--white);
  font-family: var(--ff-body);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s, border 0.2s;
  width: 100%;
  cursor: pointer;
}

.form-group select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2300B48A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  cursor: pointer;
}

.form-group select option {
  background: var(--dark-grey);
  color: var(--white);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--placeholder);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
  border: 0.095rem solid var(--mint);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--mint);
}

.form-group input.invalid:focus,
.form-group select.invalid:focus,
.form-group textarea.invalid:focus {
  border-color: var(--error);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.form-submit {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  align-self: flex-start;
  margin-top: 0.5rem;
  background: none;
  border: none;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.78rem;
  font-weight: var(--fw-bold);
  font-family: var(--ff-body);
  border-bottom: 2px solid var(--mint);
  padding-bottom: 6px;
  cursor: pointer;
  transition: color 0.2s, letter-spacing 0.2s;
}

.form-submit:hover {
  color: var(--mint);
  letter-spacing: 0.25em;
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: var(--mint);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
  margin-right: 6px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.error {
  color: var(--error);
}

.field.invalid {
  border: 0.0625rem solid var(--error);
}

.form-success-banner,
.form-error-banner {
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease;

  margin-top: 2rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  display: none;
  align-items: center;
  justify-content: center;
}

.form-success-banner {
  border: 1px solid rgba(0, 180, 138, 0.25);
  background: rgba(0, 180, 138, 0.06);
  color: var(--mint);
}

.form-error-banner {
  border: 1px solid rgba(255, 107, 107, 0.25);
  background: rgba(255, 107, 107, 0.06);
  color: var(--error);
}

.form-success-banner.is-visible,
.form-error-banner.is-visible {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

/* ════════════════════════════════
   FOOTER
════════════════════════════════ */

.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--footer-border);
  margin-top: 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 2rem;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-inner {
    padding: 2.5rem 2rem 2.5rem 4rem;
    grid-template-columns: 1fr auto 1fr;
    text-align: left;
  }
}

@media (min-width: 1024px) {
  .footer-inner {
    padding: 3rem 2rem 3rem 5rem;
  }
}

.footer-brand .footer-logo {
  font-size: 1.2rem;
  font-weight: var(--fw-bold);
  color: var(--white);
  text-decoration: none;
  display: block;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.8rem;
  color: var(--placeholder);
  line-height: 1.5;
  max-width: 100%;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .footer-brand p {
    max-width: 200px;
    margin: 0;
  }
}

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

.footer-social-label {
  font-size: 0.85rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mint);
}

.footer-social-icons {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.footer-social-icons a {
  opacity: 0.5;
  transition: opacity 0.2s, transform 0.2s;
}

.footer-social-icons svg {
  width: 24px;
  height: 24px;
  fill: var(--white);
  display: block;
}

.social-inline .fm-icon, .footer-social-icons .fm-icon { margin-block-start: 0.2rem; }

.footer-right { text-align: center; }

@media (min-width: 768px) {
  .footer-right { text-align: right; }
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--footer-copy);
  line-height: 1.6;
}

.footer-copy span { color: var(--mint); }


/* ════════════════════════════════
CASE STUDY (Theme-Agnostic)
════════════════════════════════ */
.cs-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
@media (min-width: 768px) { .cs-container { padding: 0 2rem 0 4rem; } }
@media (min-width: 1024px) { .cs-container { padding: 0 2rem 0 5rem; } }

.cs-section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--white);
  margin-top: 0.5rem;
  margin-bottom: 2rem;
  line-height: 1.1;
}

.cs-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.cs-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--white);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.78rem;
  font-weight: 700;
  border-bottom: 2px solid var(--mint);
  padding-bottom: 5px;
  transition: color 0.2s, letter-spacing 0.2s;
}
.cs-link:hover {
  color: var(--mint);
  letter-spacing: 0.25em;
}
.cs-link svg {
  width: 14px; height: 14px;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
}
.cs-link svg.filled { fill: currentColor; stroke: none; }

/* ── case study hero ── */
.cs-hero {
  position: relative; z-index: 1;
  min-height: 60vh; display: flex; align-items: center;
  padding-top: 7rem;
}
.cs-hero-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 4rem 1.5rem; width: 100%;
}
@media (min-width: 768px) { .cs-hero-inner { padding: 5rem 2rem 5rem 4rem; } }
@media (min-width: 1024px) { .cs-hero-inner { padding: 5rem 2rem 5rem 5rem; } }

.cs-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700; color: var(--white);
  line-height: 1.0; margin-top: 0.75rem; margin-bottom: 1.5rem;
}
.cs-tagline {
  color: var(--grey); font-size: 1.05rem; line-height: 1.8; max-width: 560px;
}

/* ── preview ── */
.cs-preview { position: relative; z-index: 1; padding: 5rem 0; }
.cs-preview-grid {
  display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-top: 2rem;
}
@media (min-width: 768px) {
  .cs-preview-grid { grid-template-columns: 2fr 1fr; align-items: start; }
}
.cs-preview-desktop, .cs-preview-mobile { position: relative; }
.cs-preview-desktop img, .cs-preview-mobile img {
  width: 100%; border-radius: 8px;
  border: 1px solid var(--border); display: block;
}
.cs-preview-label {
  display: inline-block; margin-top: 0.75rem;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--placeholder);
}

/* ── overview ── */
.cs-overview { position: relative; z-index: 1; padding: 5rem 0; }
.cs-overview-grid {
  display: grid; grid-template-columns: 1fr; gap: 3rem;
}
@media (min-width: 768px) {
  .cs-overview-grid { grid-template-columns: 1fr 2fr; }
  .cs-overview-left { position: sticky; top: 7rem; align-self: start; }
}
.cs-overview-block {
  margin-bottom: 2.5rem; padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--footer-border);
}
.cs-overview-block:last-child {
  border-bottom: none; margin-bottom: 0; padding-bottom: 0;
}
.cs-overview-block h3 {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--mint); margin-bottom: 0.85rem;
}
.cs-overview-block p {
  color: var(--grey); font-size: 1rem; line-height: 1.85;
}
.cs-overview-block ul, .cs-overview-block ol {
  list-style: none; color: var(--grey);
}
.cs-overview-block ul li, .cs-overview-block ol li {
  position: relative; padding-inline-start: 1.5rem;
  margin-block-end: 0.5rem; line-height: 1.5;
}
.cs-overview-block ol li::before {
  content: "★ "; position: absolute; color: var(--mint); left: -0.1875rem;
}
.cs-overview-block ul li::before {
  content: '—'; position: absolute; color: var(--mint); left: -0.1875rem;
}
.cs-overview-block ul .title,
.cs-overview-block ol .title,
.cs-overview-block .title {
  color: var(--mint); font-weight: var(--fw-bold);
}
.cs-overview-block .challenge-description .title { color: var(--mint); }
.cs-overview-block .ecomm-challenge-title { color: var(--mint); }
.cs-overview-block .ecomm-challenge-description {
  line-height: 1.5; margin-block-end: 1.5rem;
}
.cs-overview-block .ecomm-challenge-description em,
.cs-overview-block .lp-challenge-description em { color: var(--mint); }
.cs-overview-block .ecomm-challenge-solution {
  padding-block-end: 1rem; margin-block-end: 1rem;
}
.cs-overview-block .ecomm-challenge-solution:not(:last-child) {
  border-bottom: 2px solid var(--mint);
}

/* ── tools ── */
.cs-tools {
  position: relative; z-index: 1; padding: 5rem 0;
  border-top: 1px solid var(--section-border);
}
.cs-tools .stack-tags { margin-top: 1.5rem; }

/* ── cta ── */
.cs-cta { position: relative; z-index: 1; padding: 5rem 0 7rem; }
.cs-cta-inner {
  background: var(--dark-grey); border: 1px solid var(--border);
  border-radius: 12px; padding: 3rem 2.5rem; text-align: center;
}
@media (min-width: 1024px) { .cs-cta-inner { padding: 4rem 3rem; } }
.cs-cta-inner h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700;
  color: var(--white); margin-bottom: 1rem;
}
.cs-cta-inner p {
  color: var(--grey); font-size: 1rem; line-height: 1.7;
  max-width: 420px; margin: 0 auto;
}
.cs-cta-inner .cs-links { justify-content: center; }

/* FIXED: Adapt to both themes */
.cs-link-primary {
  background: var(--mint);
  color: var(--text-on-accent); /* Swapped from #111 */
  border-bottom: none; padding: 0.7rem 1.5rem;
  border-radius: 4px; letter-spacing: 0.15em;
}
.cs-link-primary:hover {
  color: var(--text-on-accent);
  background: var(--mint-hover); /* Swapped from #00c99a */
  letter-spacing: 0.18em;
}

/* CS Links */
.cs-project-nav {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;

}

.cs-nav-link {
  display: inline-flex;
  flex-direction: column;
  gap: 0.35rem;
  text-decoration: none;
  transition: color 0.2s, letter-spacing 0.2s;
  color: var(--white);
}

.cs-nav-link:hover {
  color: var(--mint);
}

.cs-nav-next {
  align-items: flex-end;
}

.cs-nav-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.78rem;
  font-weight: 700;
  border-bottom: 2px solid var(--mint);
  padding-bottom: 5px;
  transition: letter-spacing 0.2s;
}

.cs-nav-link:hover .cs-nav-label {
  letter-spacing: 0.25em;
}

.cs-nav-label svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.cs-nav-prev:hover .cs-nav-label svg {
  transform: translateX(-3px);
}

.cs-nav-next:hover .cs-nav-label svg {
  transform: translateX(3px);
}

.cs-nav-title {
  font-size: 0.75rem;
  opacity: 0.6;
  letter-spacing: 0.05em;
}

/* ── LOCK LOADER & ENTRY TO DARK ── */
.entry-screen, .loader-overlay {
  --bg: #151515 !important;
  --surface: #1a1a1a !important;
  --header-bg: rgba(21, 21, 21, 0.85) !important;
  --dark-grey: #242424 !important;
  --border: #2a2a2a !important;
  --white: #FFFFFF !important;
  --grey: #D9D9D9 !important;
  --placeholder: #555555 !important;
  --mint: #00B48A !important;
  --error: #FF6B6B !important;
  background: var(--bg) !important;
}