/* =====================================================
   ELECTROTERM — proyectos_v2.css
   Mobile-First · Blue Navbar Variant
===================================================== */

/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Familjen+Grotesk:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Azeret+Mono:wght@400;500;600&display=swap');

/* ── Custom Properties ── */
:root {
  /* Brand Colors */
  --primary:        #2B5F8D;
  --primary-dark:   #1A3D5C;
  --primary-light:  #4A7FA8;
  --teal:           #3B8A9C;
  --sky:            #6AAFCC;
  --accent-cyan:    #00B4D8;
  --accent-orange:  #D87941;

  /* Neutrals */
  --white:          #FFFFFF;
  --neutral-light:  #F5F3F0;
  --neutral-warm:   #E8E4DF;
  --neutral-mid:    #B8B4AF;
  --neutral-dark:   #2C2C2C;
  --neutral-black:  #0F0F0F;

  /* Typography */
  --font-display:   'Syne', sans-serif;
  --font-body:      'Familjen Grotesk', sans-serif;
  --font-mono:      'Azeret Mono', monospace;

  /* Spacing (8px base) */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  1.5rem;
  --sp-lg:  2rem;
  --sp-xl:  3rem;
  --sp-2xl: 4rem;
  --sp-3xl: 6rem;

  /* Layout */
  --max-w:  1200px;
  --nav-h:  64px;

  /* Transitions */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur:  0.3s;
}

/* ── Reset ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--neutral-dark);
  background: var(--neutral-light);
  overflow-x: hidden;
}
img  { display: block; max-width: 100%; height: auto; }
a    { text-decoration: none; color: inherit; }
ul   { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── Typography Helpers ── */
.label-sm {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.75rem 1.75rem;
  border: 2px solid transparent;
  border-radius: 4px;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform 0.15s ease;
}
.btn:hover  { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--primary-dark);
  color: var(--white);
  border-color: var(--primary-dark);
}
.btn--primary:hover {
  background: var(--primary);
  border-color: var(--primary);
}
.btn--secondary {
  background: transparent;
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}
.btn--secondary:hover {
  background: var(--primary-dark);
  color: var(--white);
}
.btn--dark {
  background: var(--primary-dark);
  color: var(--white);
  border-color: var(--primary-dark);
}
.btn--dark:hover {
  background: var(--primary);
  border-color: var(--primary);
}
.btn--accent {
  background: var(--accent-cyan);
  color: var(--white);
  border-color: var(--accent-cyan);
}
.btn--accent:hover {
  background: var(--teal);
  border-color: var(--teal);
}
.btn--full { width: 100%; }

/* =============================================
   NAVBAR
   ============================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--primary-dark);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: box-shadow var(--dur) var(--ease);
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  padding: 0 var(--sp-sm);
  height: var(--nav-h);
}
.navbar__logo img {
  height: 8vh;
  padding: 1vh 0;
  width: auto;
}

/* Desktop nav — hidden on mobile */
.navbar__nav {
  display: none;
  align-items: center;
  gap: var(--sp-lg);
}
.navbar__link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  padding: 0.25rem 0;
  position: relative;
  transition: color var(--dur) var(--ease);
}
.navbar__link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--accent-cyan);
  transition: width var(--dur) var(--ease);
}
.navbar__link:hover { color: var(--white); }
.navbar__link:hover::after { width: 100%; }
.navbar__link--active { color: var(--accent-cyan); }
.navbar__link--active::after { width: 100%; }
.navbar__link--cta {
  background: var(--accent-cyan);
  color: var(--white);
  padding: 0.5rem 1.25rem;
  letter-spacing: 0.1em;
  border-radius: 5px;
}
.navbar__link--cta::after { display: none; }
.navbar__link--cta:hover {
  background: var(--teal);
  color: var(--white);
}
.navbar.scrolled {
  box-shadow: 0 2px 24px rgba(27, 61, 92, 0.1);
}

/* Hamburger */
.navbar__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0 5vw;
  width: 40px;
  height: 40px;
  justify-content: center;
  align-items: center;
}
.navbar__hamburger span {
  display: block;
  width: 7vw;
  height: 0.2vh;
  background: var(--white);
  transition: transform var(--dur) var(--ease),
              opacity var(--dur) var(--ease);
  transform-origin: center;
}
.navbar__hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.navbar__hamburger.open span:nth-child(2) {
  opacity: 0;
}
.navbar__hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav panel */
.navbar__mobile {
  display: flex;
  flex-direction: column;
  background: var(--primary-dark);
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.4s var(--ease);
}
.navbar__mobile.open {
  max-height: 300px;
}
.navbar__mobile-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  padding: var(--sp-sm) var(--sp-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.navbar__mobile-link:last-child { border-bottom: none; }
.navbar__mobile-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-cyan);
}

/* =====================================================
   CONTAINER
===================================================== */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-sm);
  position: relative;
  z-index: 1;
}

/* =====================================================
   PAGE HEADER  (breadcrumb + title + subtitle)
   Accounts for fixed navbar height
===================================================== */
.page-header {
  background: var(--white);
  padding: calc(var(--nav-h) + 1.25rem) var(--sp-sm) 1.75rem;
  color: var(--primary-dark);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(43,95,141,0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  line-height: 1.1;
  color: var(--primary-dark);
}
.page-subtitle {
  font-size: clamp(0.9375rem, 2vw, 1.125rem);
  color: var(--neutral-dark);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* =====================================================
   PROJECTS SECTION
===================================================== */
.projects {
  background: var(--white);
  padding: var(--sp-md) var(--sp-sm) var(--sp-xl);
  min-height: 60vh;
}

/* Mobile Dropdown Filter */
.project-filters-mobile {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs);
  margin-bottom: var(--sp-xl);
}
.filter-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--neutral-dark);
  font-weight: 500;
}
.filter-select {
  width: 100%;
  padding: 0.875rem var(--sp-sm);
  background: var(--white);
  border: 2px solid var(--neutral-warm);
  color: var(--neutral-dark);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%232B5F8D' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--sp-sm) center;
  background-size: 16px;
  padding-right: 2.5rem;
  transition: border-color var(--dur) var(--ease);
}
.filter-select:focus {
  outline: none;
  border-color: var(--primary);
}
.filter-select option { padding: var(--sp-sm); }

/* Desktop Button Filters (hidden on mobile) */
.project-filters {
  display: none;
  gap: var(--sp-xs);
  justify-content: center;
  margin-bottom: var(--sp-xl);
  flex-wrap: wrap;
}
.filter-btn {
  padding: 0.75rem 1.25rem;
  background: transparent;
  border: 2px solid var(--neutral-warm);
  color: var(--neutral-dark);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
}
.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}
.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-xl);
}

/* =====================================================
   PROJECT CARDS
===================================================== */
.project-card {
  background: var(--white);
  border: 1px solid var(--neutral-warm);
  overflow: hidden;
  transition:
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease),
    opacity var(--dur) var(--ease);
  opacity: 1;
  transform: scale(1);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(27, 61, 92, 0.12);
}

.project-image {
  width: 100%;
  height: 240px;
  background: var(--neutral-warm);
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}
.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.project-card:hover .project-image img { transform: scale(1.05); }

.project-content {
  padding: var(--sp-md);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.project-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: var(--sp-xs);
  display: block;
  min-height: 1.2em;
}
.project-title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--neutral-black);
  margin-bottom: var(--sp-sm);
  min-height: 3.6em;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.project-description {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--neutral-dark);
  margin-bottom: auto;
  flex: 1;
}
.project-data {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  padding-top: var(--sp-sm);
  border-top: 1px solid var(--neutral-light);
  margin-top: var(--sp-md);
}

/* =====================================================
   CTA SECTION
===================================================== */
.proyectos-cta {
  background: var(--neutral-light);
  padding: var(--sp-3xl) var(--sp-sm);
  text-align: center;
}
.proyectos-cta__inner { margin: 0 auto; }
.proyectos-cta__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--neutral-dark);
  margin-bottom: var(--sp-md);
}
.proyectos-cta__desc {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--neutral-dark);
  margin-bottom: var(--sp-xl);
}

/* =====================================================
   FOOTER
===================================================== */
.footer {
  background: var(--primary-dark);
  padding: var(--sp-lg) 0;
}
.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-sm);
  text-align: center;
}
.footer__brand {
  margin-bottom: var(--sp-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
}
.footer__logo {
  display: inline-block;
  margin: 0 auto;
  width: 120px;
  height: auto;
}
.footer__brand img,
.footer__logo img {
  display: block;
  width: 100%;
  max-width: 120px;
  height: auto;
  opacity: 1;
  visibility: visible;
}
.footer__brand p  { display: none; }
.footer__col      { display: none; }
.footer__bottom {
  text-align: center;
  margin: 0;
  padding: 0;
}
.footer__bottom .label-sm {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.6rem;
  letter-spacing: 0.05em;
}

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

/* ── Tablet ≥ 768px ── */
@media (min-width: 768px) {
  /* Navbar */
  .navbar__inner { height: 100px; }
  .navbar__logo img { height: 9.5vh; padding: 1vh 0; width: auto; }
  .navbar__hamburger { width: 52px; height: 52px; gap: 7px; }
  .navbar__hamburger span { width: 34px; height: 2.5px; }
  .navbar__mobile-link { font-size: 1rem; padding: 1.25rem var(--sp-sm); }

  /* Page header — offset matches 100px navbar */
  .page-header { padding-top: calc(100px + 1.25rem); }

  .projects {
    padding: var(--sp-2xl) var(--sp-lg);
  }
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-lg);
  }
  .project-image { height: 280px; }

  .proyectos-cta { padding: var(--sp-3xl) var(--sp-lg); }
}

/* ── Desktop ≥ 992px ── */
@media (min-width: 992px) {
  /* Navbar */
  .navbar__nav { display: flex; }
  .navbar__hamburger { display: none; }
  .navbar__mobile { display: none !important; }
  .navbar__inner {
    padding-right: 5vw;
    height: var(--nav-h);
  }
  .navbar__logo img {
    height: 10vh;
    padding: 0.5vh 0;
    margin-left: 3vw;
    width: auto;
  }

  /* Page header */
  .page-header { padding: calc(var(--nav-h) + 1.5rem) var(--sp-lg) 1.25rem; }
  .container   { padding: 0 var(--sp-lg); }

  /* Filters */
  .project-filters-mobile { display: none; }
  .project-filters {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
  }
  .filter-btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.8125rem;
    width: 100%;
  }

  /* Projects grid */
  .projects { padding: var(--sp-sm) var(--sp-lg) var(--sp-3xl); }
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-xl);
  }
  .project-image   { height: 320px; }
  .project-content { padding: var(--sp-lg); }

  /* Footer */
  .footer { padding: var(--sp-3xl) 0 0; }
  .footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--sp-2xl);
    text-align: left;
  }
  .footer__brand {
    display: block;
    text-align: left;
    margin-bottom: 0;
    align-items: flex-start;
  }
  .footer__logo {
    display: block;
    margin: 0;
    margin-bottom: var(--sp-sm);
    width: auto;
  }
  .footer__brand img,
  .footer__logo img {
    max-width: none;
    width: auto;
    height: 48px;
    margin: 0;
  }
  .footer__brand p {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
    max-width: 300px;
  }
  .footer__col {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  .footer__col h4 {
    color: var(--neutral-light);
    margin-bottom: var(--sp-sm);
    font-size: 0.9rem;
    letter-spacing: 0.15em;
  }
  .footer__col a,
  .footer__col span {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.55);
    transition: color var(--dur) var(--ease);
  }
  .footer__col a:hover { color: var(--accent-cyan); }
  .footer__bottom {
    margin-top: var(--sp-xl);
    padding: var(--sp-md) var(--sp-sm);
  }
  .footer__bottom .label-sm { font-size: 0.6875rem; }
}

/* ── Large Desktop ≥ 1200px ── */
@media (min-width: 1200px) {
  /* Navbar */
  .navbar__inner { padding-right: 5vw; height: 90px; }
  .navbar__logo img { height: 11vh; padding: 1vh 0; width: auto; }
  .navbar__link { font-size: 1rem; }

  /* Page header — offset matches 90px navbar */
  .page-header { padding-top: calc(90px + 1.5rem); }

  .project-image { height: 340px; }
}