/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */
:root {
  --color-bg: #0a0a0f;
  --color-bg-alt: #111118;
  --color-surface: #1a1a24;
  --color-text: #e4e4e8;
  --color-text-muted: #9999a8;
  --color-primary: #7c5cfc;
  --color-primary-light: #a78bfa;
  --color-accent: #06d6a0;
  --color-border: rgba(255, 255, 255, 0.08);

  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', monospace;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --radius: 0.75rem;
  --radius-lg: 1.25rem;
  --transition: 0.3s ease;
  --max-width: 1120px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  display: block;
  max-width: 100%;
}

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

ul {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header__logo span {
  color: var(--color-primary-light);
}

/* Hamburger */
.header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
  z-index: 110;
}

.header__toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.header__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.header__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.header__nav ul {
  display: flex;
  gap: var(--space-md);
}

.header__nav a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.header__nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.header__nav a:hover,
.header__nav a:focus-visible {
  color: var(--color-text);
}

.header__nav a:hover::after,
.header__nav a:focus-visible::after {
  width: 100%;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  padding-top: var(--header-h);
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding: var(--space-2xl) 0;
}

.hero__tagline {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  max-width: 560px;
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Glow effect */
.hero__glow {
  position: absolute;
  top: 20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 92, 252, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: pulse 6s ease-in-out infinite alternate;
}

@keyframes pulse {
  from { transform: scale(1); opacity: 0.6; }
  to   { transform: scale(1.15); opacity: 1; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 92, 252, 0.3);
}

.btn--outline {
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  transform: translateY(-2px);
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section {
  padding: var(--space-2xl) 0;
}

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

.section__heading {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xs);
  text-align: center;
}

.section__heading::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 3px;
  margin: var(--space-sm) auto var(--space-lg);
}

.section__subheading {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto var(--space-lg);
}

/* ==========================================================================
   About
   ========================================================================== */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about__text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.about__text strong {
  color: var(--color-text);
}

.about__stats {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
}

.stat {
  text-align: center;
}

.stat__number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary-light);
  line-height: 1;
}

.stat__suffix {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-light);
}

.stat__label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ==========================================================================
   Cards (Services)
   ========================================================================== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-sm);
  color: var(--color-primary-light);
}

.card__icon svg {
  width: 100%;
  height: 100%;
}

.card__title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.card__text {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Timeline (Process)
   ========================================================================== */
.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  position: relative;
}

.timeline__step {
  position: relative;
  padding-left: 3.5rem;
}

.timeline__marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  border-radius: 50%;
  font-size: 0.9rem;
}

.timeline__step h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.timeline__step p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Contact Form
   ========================================================================== */
.form {
  max-width: 640px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form__group {
  display: flex;
  flex-direction: column;
}

.form__group--full {
  grid-column: 1 / -1;
}

.form label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text-muted);
}

.form input,
.form textarea {
  font: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(124, 92, 252, 0.15);
}

.form input::placeholder,
.form textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.5;
}

.form__submit {
  grid-column: 1 / -1;
  justify-self: start;
}

.form__status {
  grid-column: 1 / -1;
  font-size: 0.9rem;
  min-height: 1.4em;
}

.form__status--success {
  color: var(--color-accent);
}

.form__status--error {
  color: #f87171;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  gap: var(--space-md);
}

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

.footer__links a:hover {
  color: var(--color-text);
}

/* ==========================================================================
   Animations (scroll reveal)
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
  .header__toggle {
    display: flex;
  }

  .header__nav {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.97);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
  }

  .header__nav.is-open {
    opacity: 1;
    visibility: visible;
  }

  .header__nav ul {
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
  }

  .header__nav a {
    font-size: 1.25rem;
  }

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

  .about__stats {
    justify-content: flex-start;
  }

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

  .form__group--full {
    grid-column: 1;
  }

  .form__submit {
    grid-column: 1;
  }

  .form__status {
    grid-column: 1;
  }

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

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}