/* ============================================
   GRND Consulting — Dark theme (Cursor-inspired)
   Built with ui-ux-pro-max skill — Dark Mode OLED
   + Hero+Features+CTA landing pattern
   ============================================ */

/* --- RESET & BASE --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Core palette — Dark Mode OLED */
  --bg:            #000000;
  --bg-alt:        #050505;
  --surface:       #0a0a0a;
  --border:        rgba(255, 255, 255, 0.08);
  --border-hover:  rgba(255, 255, 255, 0.16);

  /* Text */
  --text:          #ffffff;
  --text-muted:    #888888;
  --text-dim:      #444444;

  /* Accent — purple → blue gradient */
  --accent-1:      #7c6aef;
  --accent-2:      #3b82f6;
  --gradient:      linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --glow-1:        rgba(124, 106, 239, 0.18);
  --glow-2:        rgba(59, 130, 246, 0.10);

  /* Feedback */
  --success:       #22c55e;
  --error:         #ef4444;

  /* Shape */
  --radius:        12px;
  --radius-lg:     20px;

  /* Motion */
  --font:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ease:          cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition:    0.3s var(--ease);
  --stagger-step:  80ms;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

/* --- FOCUS VISIBLE — accessibility (skill: §1 focus-states) --- */
:focus-visible {
  outline: 2px solid var(--accent-1);
  outline-offset: 3px;
  border-radius: 4px;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-1);
  outline-offset: 3px;
  box-shadow: 0 0 0 5px rgba(124, 106, 239, 0.18);
}

/* --- CONTAINER --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- GRADIENT TEXT --- */
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn--primary {
  background: var(--gradient);
  color: #fff;
  padding: 10px 24px;
  position: relative;
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: var(--gradient);
  filter: blur(14px);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
}

.btn--primary:hover { transform: translateY(-1px); }
.btn--primary:hover::before { opacity: 0.55; }
.btn--primary:active { transform: translateY(0); }

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 10px 24px;
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  border-color: var(--border-hover);
  color: var(--text);
}

.btn--lg  { padding: 14px 32px; font-size: 1rem; }
.btn--full { width: 100%; }
.btn--cal  { width: 100%; margin-bottom: 24px; }

/* --- NAV --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
}

.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav__logo-dot { color: var(--accent-1); }

.nav__links {
  display: flex;
  gap: 32px;
}

.nav__links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition);
  font-weight: 500;
}
.nav__links a:hover { color: var(--text); }

.nav__cta { font-size: 0.85rem; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* Burger open state */
.nav__burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- MOBILE MENU --- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(0, 0, 0, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  align-items: center;
  justify-content: center;
  text-align: center;
}

.mobile-menu.open { display: flex; }

.mobile-menu__close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  transition: color var(--transition);
}
.mobile-menu__close:hover { color: var(--text); }

.mobile-menu a {
  display: block;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 14px 0;
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--text); }

/* --- HERO --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center,
    var(--glow-1) 0%,
    var(--glow-2) 40%,
    transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.hero__tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-1);
  margin-bottom: 24px;
  padding: 6px 16px;
  border: 1px solid rgba(124, 106, 239, 0.25);
  border-radius: 9999px;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.75rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 24px;
}

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.75;
  color: var(--text-muted);
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- SECTIONS --- */
.section {
  padding: 120px 0;
  position: relative;
}

.section--alt { background: var(--bg-alt); }

.section__header {
  text-align: center;
  margin-bottom: 64px;
}

.section__tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-1);
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1.15;
}

/* --- PAIN CARDS --- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.pain-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: border-color var(--transition), transform var(--transition);
}
.pain-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.pain-card__icon {
  color: var(--accent-1);
  margin-bottom: 20px;
}

.pain-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.pain-card p {
  font-size: 0.925rem;
  line-height: 1.65;
}

/* --- SERVICE CARDS --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.service-card:hover::before { opacity: 1; }

.service-card__number {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 20px;
  font-variant-numeric: tabular-nums;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.service-card p {
  font-size: 0.925rem;
  line-height: 1.65;
  margin-bottom: 20px;
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-card__list li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
}

.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-1);
}

/* --- STEPS --- */
.steps {
  max-width: 680px;
  margin: 0 auto;
  position: relative;
}

.step {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  position: relative;
  padding-bottom: 48px;
}
.step:last-child { padding-bottom: 0; }

.step__line {
  position: absolute;
  left: 11px;
  top: 24px;
  bottom: 0;
  width: 1px;
  background: var(--border);
}
.step:last-child .step__line { display: none; }

.step__dot {
  width: 24px;
  height: 24px;
  min-width: 24px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent-1);
  position: relative;
  z-index: 1;
}
.step__dot::after {
  content: '';
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--accent-1);
}

.step__content { flex: 1; }

.step__label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-1);
  margin-bottom: 4px;
}

.step__content h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.step__content p {
  font-size: 0.95rem;
  line-height: 1.65;
}

/* --- WHY CARDS --- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.why-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: border-color var(--transition), transform var(--transition);
}
.why-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.why-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.why-card p {
  font-size: 0.925rem;
  line-height: 1.65;
}

/* --- CONTACT --- */
.contact__lead {
  font-size: 1.05rem;
  max-width: 560px;
  margin: 16px auto 0;
  line-height: 1.7;
  color: var(--text-muted);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  align-items: start;
  margin-top: 64px;
}

/* Book a call card */
.contact-book {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
}

.contact-book h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.contact-book > p {
  font-size: 0.925rem;
  line-height: 1.65;
  margin-bottom: 28px;
}

.contact-book__meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.contact-book__meta li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.contact-book__meta svg { color: var(--accent-1); flex-shrink: 0; }

.contact-book__email {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
}

.contact-book__email svg { color: var(--accent-1); flex-shrink: 0; }

.contact-book__email a {
  color: var(--text-muted);
  transition: color var(--transition);
}
.contact-book__email a:hover { color: var(--text); }

/* Divider */
.contact-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding-top: 40px;
}

.contact-divider::before,
.contact-divider::after {
  content: '';
  width: 1px;
  height: 80px;
  background: var(--border);
}

.contact-divider span {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  white-space: nowrap;
}

/* Contact form */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.required { color: var(--accent-1); margin-left: 2px; }

.form-group input,
.form-group textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  min-height: 48px;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(124, 106, 239, 0.12);
}

/* Inline validation (skill: §8 inline-validation) */
.form-group input.invalid,
.form-group textarea.invalid {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-error {
  display: block;
  font-size: 0.8rem;
  color: var(--error);
  margin-top: 6px;
  min-height: 1em;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Form status banner (aria-live) */
.form-status {
  display: none;
  font-size: 0.9rem;
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  line-height: 1.5;
}

.form-status.success {
  display: block;
  background: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.2);
  color: var(--success);
}

.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--error);
}

.form-note {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 12px;
}

/* --- FOOTER --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer__brand { text-align: center; }

.footer__brand p {
  font-size: 0.875rem;
  color: var(--text-dim);
  margin-top: 8px;
}

.footer__links {
  display: flex;
  gap: 32px;
}

.footer__links a {
  font-size: 0.85rem;
  color: var(--text-dim);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--text); }

.footer__bottom p {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* --- SCROLL REVEAL — with stagger support --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

/* Stagger delays via data-stagger attribute */
.reveal[data-stagger="1"] { transition-delay: calc(1 * var(--stagger-step)); }
.reveal[data-stagger="2"] { transition-delay: calc(2 * var(--stagger-step)); }
.reveal[data-stagger="3"] { transition-delay: calc(3 * var(--stagger-step)); }

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

/* --- PREFERS REDUCED MOTION (skill: §2 reduced-motion) --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  html { scroll-behavior: auto; }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn--primary:hover { transform: none; }
  .pain-card:hover,
  .service-card:hover,
  .why-card:hover { transform: none; }
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .contact-divider {
    flex-direction: row;
    padding: 24px 0;
  }

  .contact-divider::before,
  .contact-divider::after {
    width: 100%;
    height: 1px;
  }
}

@media (max-width: 768px) {
  .nav__links,
  .nav__cta { display: none; }

  .nav__burger { display: flex; }

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .section { padding: 80px 0; }

  .pain-grid,
  .why-grid {
    grid-template-columns: 1fr;
  }

  /* Reset stagger delays on mobile — all appear at once */
  .reveal[data-stagger] { transition-delay: 0ms; }

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .hero__actions .btn {
    width: 100%;
    max-width: 320px;
  }

  .step { gap: 20px; }

  .contact-book { padding: 32px 24px; }
  .contact-form { padding: 32px 24px; }

  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 24px;
  }
}