/* =========================================================
   TOKENS — Primitive → Semantic → Component
   (architecture: skill design-system)
   ========================================================= */

:root {
  /* --- Primitive --- */
  --black-950: #0a0a0f;
  --black-900: #131319;
  --white-50: #f7f5fb;
  --gray-400: #9b97ac;
  --gray-700: #2a2833;
  --violet-400: #a78bfa;
  --violet-500: #8b5cf6;
  --violet-600: #7c3aed;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;

  --font-display: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-body: "Manrope", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  /* --- Semantic --- */
  --color-bg: var(--black-950);
  --color-bg-elevated: var(--black-900);
  --color-fg: var(--white-50);
  --color-fg-muted: var(--gray-400);
  --color-border: var(--gray-700);
  --color-border-hover: var(--violet-500);
  --gradient-accent: linear-gradient(120deg, var(--violet-500), var(--blue-500));
  --gradient-accent-soft: linear-gradient(120deg, rgba(139, 92, 246, 0.12), rgba(59, 130, 246, 0.12));

  /* spacing scale — 8pt rhythm */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  --container-width: 880px;

  /* --- Component --- */
  --button-primary-bg: var(--gradient-accent);
  --button-primary-fg: #ffffff;
  --button-glow: rgba(139, 92, 246, 0.35);

  --card-bg: rgba(255, 255, 255, 0.03);
  --card-border: var(--color-border);
  --card-border-hover: rgba(139, 92, 246, 0.5);
  --card-glow: rgba(59, 130, 246, 0.18);
}

/* =========================================================
   BASE
   ========================================================= */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  color: var(--color-fg);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
  text-align: center;
}

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

em {
  font-style: italic;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.bg-decor {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.32;
}

.blob-1 {
  width: 32rem;
  height: 32rem;
  top: -8%;
  left: -10%;
  background: var(--violet-600);
  animation: drift-a 28s ease-in-out infinite;
}

.blob-2 {
  width: 28rem;
  height: 28rem;
  bottom: -12%;
  right: -8%;
  background: var(--blue-600);
  animation: drift-b 34s ease-in-out infinite;
}

.blob-3 {
  width: 24rem;
  height: 24rem;
  top: 45%;
  left: 55%;
  background: var(--violet-500);
  opacity: 0.2;
  animation: drift-a 40s ease-in-out infinite reverse;
}

.blob-4 {
  width: 18rem;
  height: 48rem;
  top: 8%;
  left: -13%;
  background: var(--blue-500);
  opacity: 0.16;
  animation: drift-b 30s ease-in-out infinite;
}

.blob-5 {
  width: 18rem;
  height: 48rem;
  bottom: 2%;
  right: -13%;
  background: var(--violet-500);
  opacity: 0.16;
  animation: drift-a 36s ease-in-out infinite reverse;
}

@keyframes drift-a {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(4rem, 5rem);
  }
}

@keyframes drift-b {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-3.5rem, -3rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .blob {
    animation: none;
  }
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--violet-500);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  font-weight: 600;
  z-index: 200;
}

.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

:focus-visible {
  outline: 2px solid var(--violet-400);
  outline-offset: 3px;
}

/* =========================================================
   TOPBAR
   ========================================================= */

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  height: 4rem;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
}

.logo-mark {
  flex-shrink: 0;
  display: block;
}

.wordmark-small {
  opacity: 0.7;
}

.topbar-link {
  position: relative;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-fg-muted);
  transition: color 0.3s var(--ease);
}

.topbar-link:hover {
  color: var(--violet-400);
}

.topbar-phone {
  display: none;
  text-transform: none;
  letter-spacing: 0;
}

/* =========================================================
   KICKER
   ========================================================= */

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: var(--space-3);
}

.kicker::before,
.kicker::after {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: var(--gradient-accent);
}

/* =========================================================
   HERO
   ========================================================= */

.hero {
  padding: 10rem 0 var(--space-7);
}

.hero-inner {
  max-width: 42rem;
  margin: 0 auto;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 8vw, 4.75rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
}

.hero-lead {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  font-weight: 400;
  color: var(--gray-400);
  max-width: 32rem;
  margin: 0 auto var(--space-5);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

/* =========================================================
   BUTTONS
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.95rem 2rem;
  border-radius: 100px;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--button-primary-bg);
  color: var(--button-primary-fg);
  box-shadow: 0 0 0 0 var(--button-glow);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px -4px var(--button-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--color-fg);
  border-color: var(--color-border);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), transform 0.3s var(--ease);
}

.btn-ghost:hover {
  border-color: var(--violet-500);
  color: var(--violet-400);
  transform: translateY(-2px);
}

/* =========================================================
   SERVICES
   ========================================================= */

.services {
  padding: var(--space-7) 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  max-width: 32rem;
  margin: 0 auto var(--space-6);
}

.service-grid {
  max-width: 34rem;
  margin: 0 auto;
  text-align: left;
}

.service-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: var(--space-4);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--card-border-hover);
  box-shadow: 0 16px 40px -12px var(--card-glow);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.service-card > p {
  font-size: 0.98rem;
  color: var(--color-fg-muted);
  margin-bottom: var(--space-3);
}

.service-features {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem 1.25rem;
  list-style: none;
}

.service-features li {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  padding-left: 1.35rem;
  color: var(--color-fg);
}

.service-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: -0.05em;
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* =========================================================
   CONTACT
   ========================================================= */

.contact {
  padding: var(--space-7) 0 var(--space-6);
}

.contact-lead {
  font-size: 1.05rem;
  color: var(--gray-400);
  margin-bottom: var(--space-5);
}

/* ---------- Contact form ---------- */

.contact-form {
  max-width: 34rem;
  margin: 0 auto;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-row-split {
  flex-direction: column;
  gap: var(--space-3);
}

.form-row-split > div {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.contact-form label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gray-400);
}

.contact-form input,
.contact-form textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-fg);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--violet-500);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.18);
}

.contact-form textarea {
  resize: vertical;
  min-height: 8rem;
}

.form-submit {
  align-self: flex-start;
  border: none;
  cursor: pointer;
}

.form-submit:disabled {
  opacity: 0.7;
  cursor: default;
}

.form-status {
  font-size: 0.9rem;
  color: var(--violet-400);
}

.form-status-error {
  color: #f87171;
}

/* =========================================================
   CONTACT INFO
   ========================================================= */

.contact-info {
  padding: var(--space-5) 0 var(--space-7);
}

.info-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-2);
}

.info-item {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-fg);
  transition: color 0.3s var(--ease);
}

.info-item svg {
  color: var(--violet-400);
  flex-shrink: 0;
}

.info-item:hover {
  color: var(--violet-400);
}

.info-note {
  font-size: 0.85rem;
  color: var(--gray-400);
}

/* =========================================================
   FOOTER
   ========================================================= */

footer {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--color-fg-muted);
}

/* =========================================================
   SCROLL REVEAL
   ========================================================= */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (min-width: 480px) {
  .form-row-split {
    flex-direction: row;
    gap: var(--space-2);
  }
}

@media (min-width: 560px) {
  .topbar-phone {
    display: inline-block;
  }
}

@media (max-width: 420px) {
  .service-features {
    grid-template-columns: 1fr;
  }
}