/* ==========================================================================
   AI CERTIFICATE COURSE - STUDIO CRAFT DESIGN SYSTEM
   Palette: Pure White, Stark Black, Electric Lime Green (#D2FF00), Bright Yellow (#FFE600)
   100% Mobile Responsive, Anti-Overlap Layouts, High Contrast & Readability
   ========================================================================== */

:root {
  --c-white: #FFFFFF;
  --c-offwhite: #F8F9F5;
  --c-card-bg: #FFFFFF;
  --c-black: #0A0A0A;
  --c-text-muted: #4B5563;
  
  --c-lime: #D2FF00;      /* Electric Lime Green */
  --c-lime-hover: #BEF200;
  --c-yellow: #FFE600;    /* Vibrant Yellow */
  --c-yellow-hover: #EAD200;

  --border-stark: 2px solid var(--c-black);
  --border-thin: 1px solid var(--c-black);
  --border-subtle: 1px solid rgba(10, 10, 10, 0.14);

  --shadow-brutal: 4px 4px 0px var(--c-black);
  --shadow-brutal-sm: 2px 2px 0px var(--c-black);
  --shadow-brutal-lg: 6px 6px 0px var(--c-black);

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, Menlo, monospace;

  --radius-pill: 9999px;
  --radius-card: 14px;
  --radius-btn: 8px;
}

/* CSS Reset with Box-Sizing Protection */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  background-color: var(--c-white);
  color: var(--c-black);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--c-white);
  color: var(--c-black);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  width: 100%;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.25rem;
  box-sizing: border-box;
}

.section {
  padding: 4.5rem 0;
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

.section-alt {
  background-color: var(--c-offwhite);
  border-top: var(--border-stark);
  border-bottom: var(--border-stark);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 800;
  color: var(--c-black);
  letter-spacing: -0.03em;
  line-height: 1.18;
  word-break: break-word;
}

h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.6rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  margin-bottom: 0.75rem;
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
}

p {
  color: var(--c-text-muted);
  font-size: 1rem;
  line-height: 1.65;
}

/* Badges & Highlighters */
.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: var(--border-stark);
  line-height: 1;
}

.pill-badge.lime {
  background-color: var(--c-lime);
  color: var(--c-black);
}

.pill-badge.yellow {
  background-color: var(--c-yellow);
  color: var(--c-black);
}

.highlight-lime {
  background-color: var(--c-lime);
  color: var(--c-black);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.highlight-yellow {
  background-color: var(--c-yellow);
  color: var(--c-black);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

/* Button Component */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-btn);
  font-size: 0.95rem;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  border: var(--border-stark);
  transition: all 0.15s ease;
  font-family: inherit;
  line-height: 1.2;
  white-space: nowrap;
}

.btn-lime {
  background-color: var(--c-lime);
  color: var(--c-black);
  box-shadow: var(--shadow-brutal);
}

.btn-lime:hover {
  background-color: var(--c-lime-hover);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--c-black);
}

.btn-black {
  background-color: var(--c-black);
  color: var(--c-white);
  box-shadow: 3px 3px 0px var(--c-lime);
}

.btn-black:hover {
  background-color: #222222;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--c-lime);
}

/* ==========================================================================
   SITE HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--c-white);
  border-bottom: var(--border-stark);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--c-black);
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.brand-mark {
  background-color: var(--c-black);
  color: var(--c-lime);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.95rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--c-black);
  font-weight: 700;
  font-size: 0.92rem;
  transition: color 0.15s ease;
}

.nav-links a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ==========================================================================
   HERO SECTION (No Overlaps, Clean Stacking)
   ========================================================================== */
.hero {
  padding: 3.5rem 0 4.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.75rem;
  align-items: start;
}

.hero-left {
  display: flex;
  flex-direction: column;
}

.hero-subhead {
  font-size: 1.125rem;
  line-height: 1.65;
  color: #2D3748;
  margin: 1.25rem 0 1.75rem;
}

.hero-perks {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.hero-perk-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--c-black);
  line-height: 1.45;
}

.perk-check {
  width: 22px;
  height: 22px;
  background-color: var(--c-lime);
  border: var(--border-stark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 900;
  flex-shrink: 0;
  margin-top: 1px;
}

.hero-instructor-bar {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.9rem 1.1rem;
  border: var(--border-stark);
  border-radius: var(--radius-card);
  background-color: var(--c-offwhite);
  box-shadow: var(--shadow-brutal-sm);
  margin-top: 0.5rem;
}

.instructor-avatar-sm {
  width: 42px;
  height: 42px;
  background-color: var(--c-yellow);
  border: var(--border-stark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--c-black);
  flex-shrink: 0;
}

/* ==========================================================================
   HERO DIRECT APPLICATION FORM
   ========================================================================== */
.hero-form-box {
  background-color: var(--c-white);
  border: var(--border-stark);
  border-radius: var(--radius-card);
  padding: 2rem;
  box-shadow: var(--shadow-brutal-lg);
  position: relative;
  width: 100%;
}

.hero-form-header {
  margin-bottom: 1.25rem;
}

.hero-form-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--c-black);
  margin-bottom: 0.35rem;
}

.hero-form-desc {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  line-height: 1.5;
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--c-black);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-control {
  width: 100%;
  padding: 0.8rem 0.95rem;
  border: var(--border-stark);
  border-radius: var(--radius-btn);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--c-black);
  background-color: var(--c-white);
  outline: none;
  transition: all 0.15s ease;
}

.form-control:focus {
  border-color: var(--c-black);
  box-shadow: 0 0 0 3px var(--c-lime);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

/* Prominently Highlighted Email Success Notice */
.cert-success-highlight {
  display: none;
  background-color: var(--c-lime);
  color: var(--c-black);
  border: 3px solid var(--c-black);
  border-radius: var(--radius-card);
  padding: 2rem 1.25rem;
  text-align: center;
  box-shadow: var(--shadow-brutal);
}

.cert-success-highlight .highlight-banner {
  background-color: var(--c-yellow);
  border: var(--border-stark);
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.cert-success-highlight .highlight-main-text {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--c-black);
  line-height: 1.25;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.cert-success-highlight p {
  color: var(--c-black);
  font-size: 0.92rem;
  font-weight: 600;
}

/* ==========================================================================
   CURRICULUM & MODULES
   ========================================================================== */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}

.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.curriculum-card {
  background-color: var(--c-white);
  border: var(--border-stark);
  border-radius: var(--radius-card);
  padding: 1.65rem;
  box-shadow: var(--shadow-brutal-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.module-tag {
  display: inline-block;
  background-color: var(--c-lime);
  color: var(--c-black);
  border: var(--border-stark);
  font-size: 0.72rem;
  font-weight: 900;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
}

.curriculum-card.yellow-accent .module-tag {
  background-color: var(--c-yellow);
}

.curriculum-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.curriculum-card p {
  font-size: 0.88rem;
  line-height: 1.55;
  margin-bottom: 1rem;
}

.module-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding-top: 0.75rem;
  border-top: 1px dashed rgba(10, 10, 10, 0.2);
}

.skill-pill {
  font-size: 0.72rem;
  background-color: var(--c-offwhite);
  border: 1px solid var(--c-black);
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
  font-weight: 700;
}

/* ==========================================================================
   CERTIFICATE PREVIEW (Protected Layout, Zero Text Overlap)
   ========================================================================== */
.diploma-canvas {
  background-color: #FAFAFA;
  border: 3px solid var(--c-black);
  border-radius: 12px;
  padding: 2.5rem 1.75rem;
  box-shadow: var(--shadow-brutal-lg);
  max-width: 820px;
  margin: 0 auto;
  box-sizing: border-box;
}

.diploma-inner {
  border: 2px dashed rgba(10, 10, 10, 0.25);
  padding: 2rem 1.25rem;
  text-align: center;
  box-sizing: border-box;
}

.diploma-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  margin-bottom: 0.4rem;
}

.diploma-recipient {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-family: Georgia, serif;
  font-style: italic;
  font-weight: 700;
  color: var(--c-black);
  margin: 0.85rem auto;
  padding: 0.3rem 0.75rem;
  border-bottom: 2px solid var(--c-black);
  display: inline-block;
  max-width: 100%;
  word-break: break-word;
}

.diploma-desc {
  max-width: 580px;
  margin: 0 auto 1.75rem;
  font-size: 0.92rem;
  color: #444444;
  line-height: 1.6;
}

.diploma-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(10, 10, 10, 0.2);
  padding-top: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.diploma-seal-badge {
  width: 76px;
  height: 76px;
  background-color: var(--c-lime);
  border: var(--border-stark);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.65rem;
  text-transform: uppercase;
  box-shadow: 2px 2px 0px var(--c-black);
  flex-shrink: 0;
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background-color: var(--c-white);
  border: var(--border-stark);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 3px 3px 0px var(--c-black);
}

.faq-question {
  width: 100%;
  padding: 1.15rem 1.35rem;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--c-black);
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  gap: 0.75rem;
}

.faq-icon-tag {
  width: 26px;
  height: 26px;
  background-color: var(--c-yellow);
  border: var(--border-stark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.faq-item.active .faq-icon-tag {
  background-color: var(--c-lime);
}

.faq-answer {
  display: none;
  padding: 0 1.35rem 1.25rem;
  color: #444444;
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background-color: var(--c-white);
  border-top: var(--border-stark);
  padding: 3.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  text-decoration: none;
  color: #444444;
  font-size: 0.9rem;
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--c-black);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(10, 10, 10, 0.15);
  padding-top: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: #666666;
  font-weight: 600;
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS (Anti-Overlap Polish)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .curriculum-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav-links {
    display: none;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 3.5rem 0;
  }
  .curriculum-grid {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .hero-form-box {
    padding: 1.35rem;
  }
  .diploma-bottom {
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    text-align: center;
  }
  .diploma-bottom > div {
    text-align: center !important;
  }
  .diploma-canvas {
    padding: 1.5rem 0.85rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}