/* ============================================================
   Zadey Projects — Stylesheet
   Warm light mode · Friendly · AI Consulting
   ============================================================ */

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

/* ===== Design Tokens ===== */
:root {
  --bg:            #FAFAF7;
  --bg-alt:        #F3F0EB;
  --bg-card:       #FFFFFF;
  --border:        #E8E3DC;
  --border-subtle: #F0EDE8;

  --text-primary:   #1C1916;
  --text-secondary: #6B655E;
  --text-muted:     #B0A99F;

  --accent:        #5B4DCD;
  --accent-hover:  #4A3CBC;
  --accent-subtle: #EEEAFF;

  --btn-bg:        #5B4DCD;
  --btn-bg-hover:  #4A3CBC;
  --btn-text:      #FFFFFF;

  --success: #2A7A50;
  --error:   #C0503A;

  --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI",
          Helvetica Neue, Arial, sans-serif;

  --nav-h:    64px;
  --max-w:    1160px;
  --radius:   12px;
  --radius-sm: 8px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.06);

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

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

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

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

/* ===== Layout ===== */
.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}

.section-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.section-header {
  margin-bottom: 52px;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--text-primary);
}

.section-subtitle {
  margin-top: 12px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 540px;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: rgba(250, 250, 247, 0.90);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 10px rgba(0,0,0,0.07);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links .nav-cta {
  color: white;
  background: var(--accent);
  padding: 8px 20px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 13.5px;
  transition: background 0.2s ease, transform 0.15s ease;
}

.nav-links .nav-cta:hover {
  background: var(--accent-hover);
  color: white;
  transform: translateY(-1px);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.3s ease;
}

/* Mobile nav */
.nav-mobile {
  display: none;
  flex-direction: column;
  border-top: 1px solid var(--border);
  padding: 12px 40px 20px;
}

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

.nav-mobile a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: color 0.2s ease;
}

.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover { color: var(--text-primary); }

/* ===== Button ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--btn-bg);
  color: var(--btn-text);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  padding: 14px 32px;
  border: none;
  border-radius: 24px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
  white-space: nowrap;
  user-select: none;
  box-shadow: 0 2px 12px rgba(91, 77, 205, 0.30);
}

.btn-primary:hover {
  background: var(--btn-bg-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(91, 77, 205, 0.40);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 6px rgba(91, 77, 205, 0.20);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ===== Hero ===== */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  background: linear-gradient(150deg, var(--bg) 50%, #EAE5FF 100%);
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 40px 100px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-subtle);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(40px, 6.5vw, 76px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.06;
  color: var(--text-primary);
  margin-bottom: 24px;
  max-width: 760px;
}

.hero-subtitle {
  font-size: clamp(16px, 1.5vw, 18px);
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 500px;
  margin-bottom: 40px;
}

/* ===== Services ===== */
.services {
  padding: 96px 0;
}

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

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px 36px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent-subtle);
  border-radius: 12px;
  color: var(--accent);
  margin-bottom: 18px;
}

.service-title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.3;
}

.service-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 18px;
}

.service-examples {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.service-examples li {
  font-size: 13px;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}

.service-examples li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 11px;
  top: 1px;
}

/* ===== How It Works ===== */
.how-it-works {
  padding: 96px 0;
  background: var(--bg-alt);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

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

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--accent);
  color: white;
  font-size: 15px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 14px;
  flex-shrink: 0;
}

.step-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Contact ===== */
.contact {
  padding: 96px 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 72px;
  align-items: start;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-detail-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.contact-email {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--accent);
  word-break: break-all;
  transition: color 0.2s ease;
}

.contact-email:hover { color: var(--accent-hover); }

.contact-detail-value {
  font-size: 13.5px;
  color: var(--text-secondary);
}

.availability-badge {
  display: inline-block;
  background: #E6F5ED;
  color: var(--success);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.required { color: var(--error); }

.optional {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 11px;
}

.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  resize: vertical;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

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

.form-group input:hover,
.form-group textarea:hover {
  border-color: #C9C3BB;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 77, 205, 0.12);
}

.form-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.form-note {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.form-note.success { color: var(--success); }
.form-note.error   { color: var(--error); }

/* ===== Footer ===== */
.footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-logo {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.footer-meta span {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============================================================
   Responsive
   ============================================================ */

/* --- Tablet --- */
@media (max-width: 960px) {

  .section-inner { padding: 0 28px; }
  .nav-inner { padding: 0 28px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-mobile { padding: 12px 28px 20px; }

  .hero-inner { padding: 60px 28px 80px; }

  .services { padding: 72px 0; }
  .services-grid { grid-template-columns: 1fr; gap: 16px; }

  .how-it-works { padding: 72px 0; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 28px 36px; }

  .contact { padding: 72px 0; }
  .contact-layout { grid-template-columns: 1fr; gap: 36px; }
  .contact-card {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
    padding: 20px;
  }

  .footer-inner {
    padding: 0 28px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .footer-meta { align-items: flex-start; }
}

/* --- Mobile --- */
@media (max-width: 600px) {

  .section-inner { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
  .nav-mobile { padding: 12px 20px 20px; }

  .hero-inner { padding: 48px 20px 64px; }
  .section-header { margin-bottom: 36px; }

  .services { padding: 60px 0; }
  .service-card { padding: 24px 20px 28px; }

  .how-it-works { padding: 60px 0; }
  .steps-grid { grid-template-columns: 1fr; gap: 24px; }
  .step { flex-direction: row; align-items: flex-start; gap: 16px; }
  .step-number { margin-bottom: 0; }
  .step-body { flex: 1; }

  .contact { padding: 60px 0; }
  .contact-card { flex-direction: column; gap: 20px; }
  .form-row { grid-template-columns: 1fr; }
  .form-footer { flex-direction: column; align-items: flex-start; gap: 12px; }

  .footer-inner { padding: 0 20px; }
}

/* --- Wide screens --- */
@media (min-width: 1400px) {
  :root { --max-w: 1280px; }
}