/* =============================================================
   style.css — DevPath
   Design language: bold blue/indigo hero, clean white sections,
   coloured feature cards, strong CTA, multi-column footer.
   Inspired by modern EdTech SaaS aesthetics.
   ============================================================= */

/* ---- Variables -------------------------------------------- */
:root {
  /* Core palette */
  --indigo-900: #0f1560;
  --indigo-800: #1a2280;
  --indigo-700: #2335c2;
  --indigo-600: #3347e0;
  --indigo-500: #4f6ef7;
  --indigo-100: #eef1ff;
  --indigo-50:  #f5f7ff;

  --purple-700: #5b21b6;
  --purple-600: #7c3aed;
  --purple-100: #f3f0ff;

  --yellow-400: #fbbf24;
  --yellow-300: #fcd34d;
  --yellow-100: #fef9e7;

  --pink-100:   #fce7f3;
  --pink-500:   #ec4899;

  --green-500:  #10b981;
  --green-100:  #d1fae5;

  --orange-500: #f59e0b;
  --red-500:    #ef4444;

  /* Neutrals */
  --white:      #ffffff;
  --gray-50:    #f9fafb;
  --gray-100:   #f3f4f6;
  --gray-200:   #e5e7eb;
  --gray-300:   #d1d5db;
  --gray-400:   #9ca3af;
  --gray-500:   #6b7280;
  --gray-600:   #4b5563;
  --gray-700:   #374151;
  --gray-900:   #111827;

  /* Semantic */
  --text-heading: var(--gray-900);
  --text-body:    var(--gray-600);
  --text-light:   var(--gray-400);
  --border:       var(--gray-200);

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 21, 96, 0.05);
  --shadow-sm: 0 2px 8px rgba(15, 21, 96, 0.08);
  --shadow-md: 0 4px 20px rgba(15, 21, 96, 0.12);
  --shadow-lg: 0 8px 40px rgba(15, 21, 96, 0.16);
  --shadow-xl: 0 16px 60px rgba(15, 21, 96, 0.22);

  /* Radii */
  --r-xs:  6px;
  --r-sm:  10px;
  --r-md:  16px;
  --r-lg:  24px;
  --r-xl:  32px;
  --r-full: 9999px;

  /* Fonts */
  --font-display: "Sora", sans-serif;
  --font-body:    "Inter", sans-serif;
  --font-mono:    "JetBrains Mono", "Courier New", monospace;

  /* Transition */
  --t: 0.2s ease;
}

/* ---- Reset ------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: var(--indigo-500); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { list-style: none; }

/* ---- Shared utilities -------------------------------------- */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 32px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--indigo-600);
  background: var(--indigo-100);
  border-radius: var(--r-full);
  padding: 4px 14px;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.035em;
  line-height: 1.15;
  margin-bottom: 12px;
}

.section-sub {
  font-size: 1.02rem;
  color: var(--text-body);
  max-width: 540px;
  margin: 0 auto 56px;
  line-height: 1.75;
}

/* ---- Navigation ------------------------------------------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: rgba(10, 15, 100, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background var(--t);
}

.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.04em;
}
.nav-logo:hover { text-decoration: none; }
.nav-logo-accent { color: var(--yellow-400); }

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

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  transition: color var(--t);
}
.nav-link:hover { color: var(--white); text-decoration: none; }

.nav-btn-outline {
  font-size: 0.86rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  border: 1.5px solid rgba(255,255,255,0.28);
  border-radius: var(--r-full);
  padding: 7px 18px;
  transition: background var(--t), border-color var(--t);
}
.nav-btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.45);
  text-decoration: none;
}

/* Mobile hamburger */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--t), opacity var(--t);
}
.nav-mobile-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-mobile-toggle.open span:nth-child(2) { opacity: 0; }
.nav-mobile-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile-menu {
  display: none;
  flex-direction: column;
  padding: 16px 32px 20px;
  background: var(--indigo-900);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.nav-mobile-menu.open { display: flex; }
.nav-mobile-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-mobile-link:hover { color: var(--white); text-decoration: none; }
.nav-mobile-link:last-child { border-bottom: none; }

/* ---- Hero Section ----------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(140deg, var(--indigo-900) 0%, var(--indigo-800) 40%, var(--purple-700) 100%);
  padding: 130px 32px 90px;
  min-height: 92vh;
  display: flex;
  align-items: center;
}

/* Subtle dot-grid overlay */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 64px;
  align-items: center;
  width: 100%;
}

/* Copy column */
.hero-copy { max-width: 580px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.07);
  border-radius: var(--r-full);
  padding: 6px 16px;
  margin-bottom: 24px;
}
.hero-badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green-500);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}

.hero-heading {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 22px;
}
.hero-heading-accent { color: var(--yellow-300); }

.hero-subtext {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.72);
  line-height: 1.78;
  margin-bottom: 32px;
  max-width: 500px;
}

/* Stat strip */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 36px;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.03em;
}
.hero-stat-label {
  font-size: 0.77rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.04em;
}
.hero-stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,0.15);
}

/* Hero CTA buttons */
.hero-cta-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--yellow-400);
  color: var(--indigo-900);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--r-full);
  box-shadow: 0 4px 20px rgba(251, 191, 36, 0.4);
  transition: background var(--t), transform var(--t), box-shadow var(--t);
}
.btn-hero-primary:hover {
  background: var(--yellow-300);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(251, 191, 36, 0.5);
  text-decoration: none;
}

.btn-hero-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: rgba(255,255,255,0.1);
  border: 1.5px solid rgba(255,255,255,0.25);
  color: var(--white);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--r-full);
  transition: background var(--t);
}
.btn-hero-ghost:hover { background: rgba(255,255,255,0.18); text-decoration: none; }

/* Visual column (code preview cards) */
.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Floating info cards */
.hero-visual-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255,255,255,0.95);
  border-radius: var(--r-md);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
}
.hvc-icon {
  width: 40px; height: 40px;
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.hvc-icon--blue { background: var(--indigo-100); color: var(--indigo-600); }
.hvc-icon--green { background: var(--green-100); color: var(--green-500); }
.hvc-text { display: flex; flex-direction: column; gap: 2px; }
.hvc-title { font-family: var(--font-display); font-size: 0.88rem; font-weight: 700; color: var(--gray-900); }
.hvc-sub   { font-size: 0.77rem; color: var(--gray-500); }

/* Code preview card */
.hero-visual-main {
  background: #0d1117;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}
.hvm-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: #161b22;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.hvm-dot { width: 11px; height: 11px; border-radius: 50%; flex-shrink: 0; }
.hvm-dot--red    { background: #ff5f56; }
.hvm-dot--yellow { background: #ffbd2e; }
.hvm-dot--green  { background: #27c93f; }
.hvm-filename { font-family: var(--font-mono); font-size: 0.75rem; color: rgba(255,255,255,0.35); margin-left: 6px; }

.hvm-code {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.85;
}
.hvm-line { display: block; color: #e6edf3; }
.hvm-indent  { padding-left: 20px; }
.hvm-indent2 { padding-left: 40px; }
.hvm-kw { color: #ff7b72; }
.hvm-fn { color: #d2a8ff; }
.hvm-cm { color: #8b949e; }
.hvm-op { color: #79c0ff; }

/* Hero decorative blobs */
.hero-blob {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(90px);
  opacity: 0.25;
}
.hero-blob-1 {
  width: 560px; height: 560px;
  background: var(--purple-600);
  top: -180px; right: -180px;
}
.hero-blob-2 {
  width: 360px; height: 360px;
  background: var(--indigo-500);
  bottom: -80px; left: -100px;
}

/* ---- Skill Strip ------------------------------------------ */
.skill-strip {
  background: var(--gray-50);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 18px 32px;
}
.skill-strip-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.skill-strip-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-500);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.skill-strip-items {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
}
.ss-item {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--gray-700);
  padding: 0 16px;
}
.ss-sep {
  width: 1px;
  height: 16px;
  background: var(--gray-300);
  flex-shrink: 0;
}

/* ---- How It Works ----------------------------------------- */
.how-section {
  padding: 96px 0;
  background: var(--white);
  text-align: center;
}

.steps-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 16px;
}

.step-card {
  flex: 1;
  max-width: 300px;
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  padding: 36px 28px;
  text-align: left;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--t), transform var(--t);
}
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }

.step-num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--indigo-600);
  background: var(--indigo-100);
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--r-full);
  margin-bottom: 20px;
}

.step-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 10px;
}
.step-card p { font-size: 0.9rem; color: var(--text-body); line-height: 1.65; }

.step-connector {
  color: var(--gray-300);
  padding: 0 8px;
  flex-shrink: 0;
  margin-bottom: 20px;
}

/* ---- Features Section ------------------------------------- */
.features-section {
  padding: 96px 0;
  background: var(--gray-50);
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: left;
  margin-top: 16px;
}

/* Feature cards with distinct colour backgrounds (Eduvo style) */
.feature-card {
  border-radius: var(--r-lg);
  padding: 38px 32px;
  position: relative;
  overflow: hidden;
  transition: transform var(--t), box-shadow var(--t);
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

.feature-card--pink   { background: var(--pink-100); }
.feature-card--yellow { background: var(--yellow-100); }
.feature-card--purple { background: var(--purple-100); }

.feature-card-icon {
  width: 52px; height: 52px;
  background: rgba(255,255,255,0.7);
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
  box-shadow: var(--shadow-xs);
}
.feature-card--pink   .feature-card-icon { color: var(--pink-500); }
.feature-card--yellow .feature-card-icon { color: var(--orange-500); }
.feature-card--purple .feature-card-icon { color: var(--purple-600); }

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 0.91rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 22px;
}

.feature-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--indigo-700);
  border: 1.5px solid var(--indigo-200, #c7d2fe);
  background: rgba(255,255,255,0.6);
  padding: 7px 16px;
  border-radius: var(--r-full);
  transition: background var(--t), border-color var(--t);
}
.feature-card-link:hover {
  background: var(--white);
  border-color: var(--indigo-500);
  text-decoration: none;
}

/* ---- Form Section ----------------------------------------- */
.form-section {
  padding: 96px 0;
  background: var(--white);
  text-align: center;
}

.form-card-outer {
  max-width: 720px;
  margin: 0 auto;
}

.form-card {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--r-xl);
  padding: 44px 44px 40px;
  box-shadow: var(--shadow-lg);
  text-align: left;
}

/* Form groups */
.form-group { margin-bottom: 24px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

label {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}

/* Skill input wrap */
.skill-input-wrap {
  border: 1.5px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--gray-50);
  min-height: 48px;
  padding: 6px 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  cursor: text;
  transition: border-color var(--t), box-shadow var(--t);
}
.skill-input-wrap:focus-within {
  border-color: var(--indigo-500);
  box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.12);
  background: var(--white);
}

/* An added skill chip inside the wrap */
.skill-chip-selected {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--indigo-700);
  background: var(--indigo-100);
  border: 1px solid rgba(79, 110, 247, 0.2);
  border-radius: var(--r-full);
  padding: 3px 10px 3px 12px;
}
.skill-chip-remove {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--indigo-500);
  font-size: 1rem;
  line-height: 1;
  padding: 0;
  display: flex;
  align-items: center;
  transition: color var(--t);
}
.skill-chip-remove:hover { color: var(--red-500); }

/* Text input inside the skill wrap */
.skill-input-wrap input[type="text"] {
  border: none;
  background: transparent;
  padding: 4px 6px;
  flex: 1;
  min-width: 140px;
  box-shadow: none;
  font-family: var(--font-body);
  font-size: 0.93rem;
  color: var(--gray-900);
}
.skill-input-wrap input[type="text"]:focus {
  outline: none;
  box-shadow: none;
}

/* Quick-select chips row */
.skill-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  margin-bottom: 4px;
}

.skill-chip {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-600);
  background: var(--white);
  border: 1.5px solid var(--gray-300);
  border-radius: var(--r-full);
  padding: 5px 14px;
  cursor: pointer;
  transition: background var(--t), border-color var(--t), color var(--t);
}
.skill-chip:hover, .skill-chip.active {
  background: var(--indigo-700);
  border-color: var(--indigo-700);
  color: var(--white);
}

/* Select wrapper with custom chevron */
.select-wrap { position: relative; }
.select-wrap::after {
  content: "";
  position: absolute;
  right: 14px; top: 50%;
  transform: translateY(-50%);
  width: 0; height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--gray-400);
  pointer-events: none;
}

select, input[type="text"]:not(.skill-input-wrap input) {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--r-xs);
  font-family: var(--font-body);
  font-size: 0.93rem;
  color: var(--gray-900);
  background: var(--gray-50);
  appearance: none;
  -webkit-appearance: none;
  transition: border-color var(--t), box-shadow var(--t);
}
select:focus {
  outline: none;
  border-color: var(--indigo-500);
  box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.12);
  background: var(--white);
}

/* Form hints and error messages */
.form-hint {
  display: block;
  font-size: 0.77rem;
  color: var(--gray-400);
  margin-top: 5px;
}
.form-error-msg {
  font-size: 0.81rem;
  color: var(--red-500);
  margin-top: 5px;
  min-height: 18px;
  font-weight: 500;
}
.form-error-general {
  font-size: 0.84rem;
  color: var(--red-500);
  margin-bottom: 12px;
  min-height: 20px;
  font-weight: 500;
}

/* Main submit button */
.btn-submit {
  width: 100%;
  padding: 16px 24px;
  background: linear-gradient(90deg, var(--indigo-700) 0%, var(--purple-600) 100%);
  color: var(--white);
  border: none;
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.01em;
  box-shadow: 0 4px 20px rgba(35, 53, 194, 0.35);
  transition: opacity var(--t), transform var(--t), box-shadow var(--t);
  margin-top: 8px;
}
.btn-submit:hover {
  opacity: 0.93;
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(35, 53, 194, 0.42);
}
.btn-submit:disabled { opacity: 0.55; cursor: not-allowed; transform: none; box-shadow: none; }

/* ---- Results Section -------------------------------------- */
.results-section {
  padding: 80px 0 108px;
  background: var(--indigo-50);
  text-align: center;
}

.loading-box {
  padding: 56px 0;
  color: var(--text-body);
}
.loading-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 18px;
}
.loading-dots span {
  width: 11px; height: 11px;
  background: var(--indigo-500);
  border-radius: 50%;
  animation: dotBounce 1.2s ease-in-out infinite;
}
.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dotBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40%           { transform: scale(1.1); opacity: 1;   }
}

/* Empty state */
.empty-state {
  padding: 64px 0 32px;
}
.empty-icon { color: var(--gray-300); margin-bottom: 20px; }
.empty-state h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 10px;
}
.empty-state p { color: var(--text-body); margin-bottom: 24px; }
.btn-try-again {
  padding: 11px 24px;
  background: var(--indigo-100);
  color: var(--indigo-700);
  border: 1.5px solid rgba(79, 110, 247, 0.25);
  border-radius: var(--r-full);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t);
}
.btn-try-again:hover { background: var(--indigo-100); }

/* Results grid */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 26px;
  text-align: left;
  margin-top: 16px;
}

/* Project card */
.project-card {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--r-lg);
  padding: 30px 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: box-shadow var(--t), transform var(--t), border-color var(--t);
}
.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
  border-color: rgba(79, 110, 247, 0.3);
}

.project-card-title {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-heading);
}
.project-card-desc {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.7;
  flex: 1;
}

.project-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.project-tag {
  font-size: 0.74rem;
  font-weight: 600;
  padding: 3px 11px;
  border-radius: var(--r-full);
}
.project-tag--skill        { background: var(--indigo-100); color: var(--indigo-700); }
.project-tag--time         { background: var(--gray-100);   color: var(--gray-600);  }
.project-tag--beginner     { background: var(--green-100);  color: #065f46; }
.project-tag--intermediate { background: var(--yellow-100); color: #78350f; }
.project-tag--advanced     { background: #fee2e2;           color: #7f1d1d; }

.project-card-footer {
  padding-top: 8px;
  border-top: 1px solid var(--gray-100);
}
.btn-details {
  display: block;
  width: 100%;
  padding: 11px 18px;
  background: transparent;
  border: 1.5px solid var(--indigo-500);
  color: var(--indigo-600);
  border-radius: var(--r-xs);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: background var(--t), color var(--t);
  text-decoration: none;
}
.btn-details:hover {
  background: var(--indigo-600);
  color: var(--white);
  text-decoration: none;
}

/* ---- CTA Banner ------------------------------------------- */
.cta-section {
  padding: 96px 32px;
  background: linear-gradient(135deg, var(--indigo-800) 0%, var(--purple-700) 100%);
  text-align: center;
}
.cta-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.04em;
  line-height: 1.2;
  margin-bottom: 14px;
}
.cta-accent { color: var(--yellow-300); }
.cta-inner p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.72);
  margin-bottom: 36px;
}
.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 36px;
  background: var(--yellow-400);
  color: var(--indigo-900);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--r-full);
  box-shadow: 0 6px 24px rgba(251, 191, 36, 0.45);
  transition: background var(--t), transform var(--t);
}
.btn-cta:hover {
  background: var(--yellow-300);
  transform: translateY(-2px);
  text-decoration: none;
}

/* ---- Footer ----------------------------------------------- */
.footer {
  background: var(--indigo-900);
  padding: 64px 32px 0;
}
.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.04em;
  display: block;
  margin-bottom: 14px;
}
.footer-logo-accent { color: var(--yellow-400); }
.footer-tagline { font-size: 0.86rem; color: rgba(255,255,255,0.45); line-height: 1.7; }
.footer-col-title {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 18px;
}
.footer-links-list { display: flex; flex-direction: column; gap: 10px; }
.footer-links-list a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--t);
}
.footer-links-list a:hover { color: var(--white); text-decoration: none; }

.footer-bottom {
  max-width: 1140px;
  margin: 0 auto;
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-bottom p { font-size: 0.82rem; color: rgba(255,255,255,0.35); }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { font-size: 0.82rem; color: rgba(255,255,255,0.35); transition: color var(--t); }
.footer-bottom-links a:hover { color: rgba(255,255,255,0.7); text-decoration: none; }

/* ---- Detail Page ------------------------------------------ */
.detail-page { background: var(--gray-50); }

.detail-hero {
  background: linear-gradient(135deg, var(--indigo-900) 0%, var(--indigo-800) 50%, var(--purple-700) 100%);
  padding: 108px 0 60px;
  position: relative;
  overflow: hidden;
}
.detail-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.breadcrumb {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 24px;
  position: relative;
  z-index: 2;
}
.breadcrumb a { color: rgba(255,255,255,0.5); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb-sep { opacity: 0.4; font-size: 1rem; }

.detail-hero-content {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  z-index: 2;
}
.detail-hero-left { flex: 1; max-width: 680px; }

.detail-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.detail-tag {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 13px;
  border-radius: var(--r-full);
}
.detail-tag--level    { background: rgba(255,255,255,0.12); color: rgba(255,255,255,0.85); }
.detail-tag--interest { background: rgba(6, 182, 212, 0.18); color: #a7f3f9; }
.detail-tag--time     { background: rgba(251,191,36,0.18); color: var(--yellow-300); }

.detail-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.detail-description {
  font-size: 1.02rem;
  color: rgba(255,255,255,0.72);
  line-height: 1.78;
  max-width: 600px;
}

.detail-hero-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
  padding-top: 52px;
}
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  background: var(--yellow-400);
  color: var(--indigo-900);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--r-xs);
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(251,191,36,0.35);
  transition: background var(--t), transform var(--t);
}
.btn-download:hover { background: var(--yellow-300); transform: translateY(-1px); text-decoration: none; }

.btn-view-code {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  background: rgba(255,255,255,0.08);
  border: 1.5px solid rgba(255,255,255,0.28);
  color: var(--white);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--r-xs);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--t);
}
.btn-view-code:hover { background: rgba(255,255,255,0.16); }

/* Detail body */
.detail-body { padding: 56px 0 96px; }
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 32px;
  align-items: start;
}

.detail-section {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}
.detail-section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.detail-section-icon {
  width: 36px; height: 36px;
  background: var(--indigo-100);
  border-radius: var(--r-xs);
  display: flex; align-items: center; justify-content: center;
  color: var(--indigo-600);
  flex-shrink: 0;
}
.detail-section-header h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-heading);
}
.detail-section-sub {
  font-size: 0.87rem;
  color: var(--text-body);
  margin-bottom: 28px;
  margin-top: -14px;
}

/* Features list */
.feature-list { display: flex; flex-direction: column; gap: 12px; }
.feature-list-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.65;
}
.feature-check {
  width: 22px; height: 22px;
  background: var(--green-100);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--green-500);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Roadmap timeline */
.roadmap-timeline { display: flex; flex-direction: column; }
.roadmap-step { display: flex; gap: 0; }
.roadmap-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 36px;
}
.roadmap-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--indigo-600);
  border: 3px solid var(--indigo-100);
  position: relative; z-index: 1;
  margin-top: 4px;
}
.roadmap-line {
  flex: 1;
  width: 2px;
  background: var(--border);
  margin: 4px 0;
}
.roadmap-step:last-child .roadmap-line { display: none; }
.roadmap-content { padding: 0 0 28px 16px; flex: 1; }
.roadmap-step-num {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--indigo-600);
  background: var(--indigo-100);
  padding: 2px 10px;
  border-radius: var(--r-full);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}
.roadmap-step-text { font-size: 0.92rem; color: var(--text-body); line-height: 1.65; }

/* Resources list */
.resource-list { display: flex; flex-direction: column; gap: 10px; }
.resource-item { display: flex; }
.resource-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--indigo-600);
  font-weight: 500;
  padding: 9px 14px;
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--r-xs);
  width: 100%;
  transition: background var(--t), border-color var(--t);
}
.resource-link:hover { background: var(--indigo-100); border-color: rgba(79, 110, 247, 0.3); text-decoration: none; }
.resource-link span { flex: 1; }
.resource-plain { font-size: 0.9rem; color: var(--text-body); padding: 8px 0; }

/* Sidebar */
.detail-sidebar { display: flex; flex-direction: column; gap: 20px; position: sticky; top: 84px; }
.sidebar-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.sidebar-card--code {
  background: linear-gradient(135deg, var(--indigo-50) 0%, var(--purple-100) 100%);
  border-color: rgba(79, 110, 247, 0.18);
}
.sidebar-card-title {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tech-tag {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-700);
  background: var(--gray-100);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: var(--r-full);
}
.stats-list { display: flex; flex-direction: column; gap: 12px; }
.stats-list li { display: flex; align-items: center; justify-content: space-between; font-size: 0.88rem; }
.stats-label { color: var(--text-body); }
.stats-value { font-weight: 600; color: var(--text-heading); font-size: 0.85rem; }
.stats-value--beginner     { color: #065f46; }
.stats-value--intermediate { color: #78350f; }
.stats-value--advanced     { color: #7f1d1d; }
.sidebar-card-desc { font-size: 0.85rem; color: var(--text-body); line-height: 1.65; margin-bottom: 16px; }
.sidebar-code-actions { display: flex; gap: 10px; }
.btn-view-code-sm {
  flex: 1;
  padding: 9px 14px;
  background: var(--white);
  border: 1.5px solid var(--indigo-500);
  color: var(--indigo-600);
  border-radius: var(--r-xs);
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: background var(--t), color var(--t);
}
.btn-view-code-sm:hover { background: var(--indigo-600); color: var(--white); }
.btn-download-sm {
  flex: 1;
  padding: 9px 14px;
  background: var(--yellow-400);
  color: var(--indigo-900);
  border-radius: var(--r-xs);
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 700;
  text-align: center;
  display: block;
  transition: background var(--t);
}
.btn-download-sm:hover { background: var(--yellow-300); text-decoration: none; }

/* ---- Code Panel (slide-up) -------------------------------- */
.code-panel-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(10, 15, 80, 0.6);
  z-index: 300;
}
.code-panel-overlay.active { display: block; }
.code-panel {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 72vh;
  background: #0d1117;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  box-shadow: 0 -8px 48px rgba(0,0,0,0.45);
  z-index: 301;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}
.code-panel.active { transform: translateY(0); }
.code-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}
.code-panel-title {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: rgba(255,255,255,0.6);
}
.code-panel-actions { display: flex; align-items: center; gap: 10px; }
.code-panel-download {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--yellow-400);
  padding: 5px 14px;
  border: 1px solid rgba(251,191,36,0.3);
  border-radius: var(--r-full);
  transition: background var(--t);
}
.code-panel-download:hover { background: rgba(251,191,36,0.1); text-decoration: none; }
.code-panel-close {
  background: rgba(255,255,255,0.07);
  border: none;
  border-radius: var(--r-xs);
  padding: 6px 16px;
  font-size: 0.84rem;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  cursor: pointer;
  transition: background var(--t);
}
.code-panel-close:hover { background: rgba(255,255,255,0.13); }

/* Copy Code button */
.btn-copy-code {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(79, 110, 247, 0.15);
  border: 1px solid rgba(79, 110, 247, 0.35);
  border-radius: var(--r-xs);
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--indigo-500);
  cursor: pointer;
  transition: background var(--t), border-color var(--t), color var(--t), transform 0.1s ease;
}
.btn-copy-code:hover {
  background: rgba(79, 110, 247, 0.28);
  border-color: var(--indigo-500);
  color: #a5b4fc;
}
.btn-copy-code:active { transform: scale(0.97); }
.btn-copy-code.copied {
  background: rgba(16, 185, 129, 0.18);
  border-color: rgba(16, 185, 129, 0.4);
  color: #6ee7b7;
}

/* Copy success toast */
.copy-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #10b981;
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--r-full);
  box-shadow: 0 6px 24px rgba(16, 185, 129, 0.45);
  z-index: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.copy-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.code-viewer {
  flex: 1; overflow: auto;
  padding: 24px 28px;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.75;
  color: #e6edf3;
  white-space: pre;
  background: transparent;
}

/* ---- Error Pages ------------------------------------------ */
.error-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 40px 24px;
}
.error-page-inner { max-width: 440px; }
.error-code {
  font-family: var(--font-display);
  font-size: 7rem;
  font-weight: 800;
  color: var(--gray-200);
  line-height: 1;
  margin-bottom: 16px;
}
.error-page-inner h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 12px;
}
.error-page-inner p { color: var(--text-body); margin-bottom: 32px; }

/* Primary button (used in error pages) */
.btn-primary {
  display: inline-block;
  padding: 13px 32px;
  background: linear-gradient(90deg, var(--indigo-700), var(--purple-600));
  color: var(--white);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  border-radius: var(--r-xs);
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(35, 53, 194, 0.3);
  transition: opacity var(--t), transform var(--t);
}
.btn-primary:hover { opacity: 0.92; transform: translateY(-1px); text-decoration: none; }

/* ---- Responsive ------------------------------------------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 480px; margin: 0 auto; }
  .detail-grid { grid-template-columns: 1fr; }
  .detail-sidebar { position: static; }
  .detail-hero-content { flex-direction: column; gap: 28px; }
  .detail-hero-actions { flex-direction: row; padding-top: 0; }
  .footer-inner { grid-template-columns: 1fr 1fr; row-gap: 40px; }
}

@media (max-width: 860px) {
  .features-grid { grid-template-columns: 1fr; }
  .steps-grid { flex-direction: column; align-items: stretch; }
  .step-connector { display: none; }
  .step-card { max-width: 100%; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }
  .nav-inner { padding: 0 20px; }

  .hero { padding: 110px 20px 72px; }
  .hero-stats { gap: 16px; }

  .form-card { padding: 28px 22px 24px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }

  .results-grid { grid-template-columns: 1fr; }

  .detail-hero-actions { flex-direction: column; }
  .code-panel { height: 82vh; }

  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }

  .container { padding: 0 20px; }
  .section-sub { margin-bottom: 40px; }
}