/* ============================================================
   Portfolio — Sergio | styles.css
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Design Tokens --------------------------------------- */
:root {
  --accent:        #2563eb;
  --accent-dark:   #1d4ed8;
  --accent-light:  #eff6ff;
  --text-primary:  #111827;
  --text-secondary:#6b7280;
  --bg:            #f9fafb;
  --bg-card:       #ffffff;
  --bg-alt:        #ffffff;
  --border:        #e5e7eb;
  --radius:        10px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:     0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-accent: 0 4px 14px rgba(37,99,235,0.28);
  --container:     1100px;
  --section-v:     80px;
}

/* ---- Utility --------------------------------------------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Buttons --------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.18s, border-color 0.18s, color 0.18s,
              transform 0.18s, box-shadow 0.18s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
  font-size: 0.875rem;
  padding: 0.5rem 1.1rem;
}
.btn-outline:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

/* ---- Section Typography ---------------------------------- */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(1.65rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 3rem;
}

/* ================================================================
   NAV
   ================================================================ */
.nav-wrapper {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(249,250,251,0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}

.nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}
.nav-logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.18s;
  position: relative;
}
.nav-links a:not(.nav-cta):hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  padding: 0.4rem 1rem;
  border-radius: 7px;
  font-size: 0.875rem !important;
  transition: background 0.18s !important;
}
.nav-cta:hover {
  background: var(--accent-dark) !important;
  color: #fff !important;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.22s ease, opacity 0.22s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ================================================================
   HERO
   ================================================================ */
.hero {
  padding: 100px 0 90px;
  background: linear-gradient(150deg, #eef4ff 0%, #f9fafb 55%);
  border-bottom: 1px solid var(--border);
}

.hero-content {
  max-width: 660px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.3rem 0.75rem;
  border-radius: 99px;
  margin-bottom: 1.25rem;
}

.hero-heading {
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.08;
  color: var(--text-primary);
  margin-bottom: 1.1rem;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 2.25rem;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.hero-note {
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.hero-note strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ================================================================
   SERVICES
   ================================================================ */
.services {
  padding: var(--section-v) 0;
  background: var(--bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(235px, 1fr));
  gap: 1.25rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.22s, transform 0.22s;
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-icon {
  width: 46px;
  height: 46px;
  background: var(--accent-light);
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  color: var(--accent);
  flex-shrink: 0;
}
.service-icon svg {
  width: 22px;
  height: 22px;
  stroke-width: 1.75;
}

.service-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.45rem;
}
.service-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ================================================================
   WORK
   ================================================================ */
.work {
  padding: var(--section-v) 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.work-note {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: #f3f4f6;
  border-radius: 99px;
  padding: 0.2rem 0.7rem;
  margin-bottom: 2.5rem;
  margin-top: -2rem;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.22s, transform 0.22s;
  display: flex;
  flex-direction: column;
}
.work-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.work-card-img {
  width: 100%;
  height: 195px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.work-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.work-card-img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.5rem;
}
.work-card-img-placeholder span {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
}
.work-card-img-placeholder svg {
  width: 36px;
  height: 36px;
  color: rgba(255,255,255,0.5);
  stroke-width: 1.25;
}

.work-card-body {
  padding: 1.2rem 1.4rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.work-card-type {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.3rem;
}
.work-card-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}
.work-card-body p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.1rem;
  flex: 1;
}

/* ================================================================
   ABOUT
   ================================================================ */
.about {
  padding: var(--section-v) 0;
  background: var(--bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-text p {
  font-size: 1.025rem;
  line-height: 1.75;
  color: #374151;
  margin-bottom: 1rem;
}
.about-text p:last-of-type {
  margin-bottom: 1.75rem;
}

.about-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.badge {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid #bfdbfe;
  padding: 0.3rem 0.7rem;
  border-radius: 99px;
}

.about-visual {
  background: linear-gradient(135deg, var(--accent-light) 0%, #e0eaff 100%);
  border: 1px solid #bfdbfe;
  border-radius: 16px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.about-stat {
  display: flex;
  flex-direction: column;
}
.about-stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.04em;
  line-height: 1;
}
.about-stat-label {
  font-size: 0.85rem;
  color: #4b72b0;
  margin-top: 0.2rem;
}
.about-divider {
  height: 1px;
  background: #bfdbfe;
}

/* ================================================================
   CONTACT
   ================================================================ */
.contact {
  padding: var(--section-v) 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 4.5rem;
  align-items: start;
}

.contact-info-block {
  margin-bottom: 2rem;
}
.contact-info-block h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}
.contact-info-block p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}
.contact-email-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  margin-top: 0.5rem;
  transition: color 0.18s;
}
.contact-email-link:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}
.contact-email-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

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

.form-group {
  margin-bottom: 1.1rem;
}
.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1.5px solid var(--border);
  border-radius: 7px;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: #fff;
  appearance: none;
  outline: none;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-group textarea {
  height: 120px;
  resize: vertical;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

.form-submit-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.form-privacy {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.btn-submit {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.7rem 1.75rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s, transform 0.18s, box-shadow 0.18s;
}
.btn-submit:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  background: #111827;
  color: #9ca3af;
  padding: 2.25rem 1rem;
  text-align: center;
  font-size: 0.83rem;
  line-height: 1.6;
}
.footer a {
  color: #9ca3af;
  text-decoration: none;
  transition: color 0.18s;
}
.footer a:hover {
  color: #fff;
}
.footer-sep {
  margin: 0 0.5rem;
  opacity: 0.4;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .about-visual {
    display: none; /* hidden on mobile, keep focus on text */
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  :root {
    --section-v: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 62px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(249,250,251,0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 0 1rem;
    display: none;
    align-items: stretch;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links a:not(.nav-cta) {
    display: block;
    padding: 0.65rem 1.5rem;
    font-size: 0.95rem;
  }
  .nav-cta {
    display: block !important;
    margin: 0.5rem 1.5rem 0 !important;
    text-align: center !important;
    padding: 0.6rem 1rem !important;
    border-radius: 8px !important;
  }

  .hero {
    padding: 72px 0 60px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
  .form-submit-row {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-submit {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .work-grid {
    grid-template-columns: 1fr;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}