/* ======================================================
   ALGM Solutions — Custom Stylesheet
   Design Tokens based on design.md: "Estilo de Tecnologia de Precisao"
   ====================================================== */

/* ---------- Design Tokens (CSS Custom Properties) ---------- */
:root {
  /* Colors — Primary Palette */
  --color-primary: #003366;
  --color-primary-600: #002a55;
  --color-primary-700: #002244;
  --color-secondary: #C0C0C0;
  --color-tertiary: #FFFFFF;
  --color-neutral: #E0E0E0;
  --color-surface: #00BFFF;
  --color-surface-600: #009fcc;
  --color-accent: #36454F;

  /* Extended Colors */
  --color-success: #008000;
  --color-warning: #FFA500;
  --color-charcoal: #2d3748;
  --color-mist: #f5f7fa;

  /* Typography */
  --font-sans: 'Roboto', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --lh-body: 1.6;

  /* Spacing Rhythm — Base 8px */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radius */
  --r-sm: 0.25rem;
  --r-md: 0.5rem;
  --r-lg: 0.75rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 51, 102, 0.06);
  --shadow-md: 0 2px 12px rgba(0, 51, 102, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 51, 102, 0.10);
  --shadow-primary: 0 4px 14px rgba(0, 51, 102, 0.18);

  /* Motion */
  --dur-fast: 180ms;
  --dur-base: 260ms;
  --dur-slow: 420ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container: 1280px;
}

/* ---------- Font Imports ---------- */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Roboto:wght@300;400;500;700&display=swap');

/* ---------- Base Reset & Typography ---------- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  line-height: var(--lh-body);
  color: var(--color-accent);
  background-color: var(--color-tertiary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.75rem); }

.font-mono {
  font-family: var(--font-mono);
}

/* ---------- Technical Grid Background (design.md) ---------- */
.grid-bg {
  background-image:
    linear-gradient(to right, rgba(0, 51, 102, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 51, 102, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
}

.grid-bg-fine {
  background-image:
    linear-gradient(to right, rgba(0, 191, 255, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 191, 255, 0.08) 1px, transparent 1px);
  background-size: 16px 16px;
}

.hero-grid {
  background-image:
    linear-gradient(rgba(0, 51, 102, 0.92), rgba(0, 51, 102, 0.88)),
    linear-gradient(to right, rgba(0, 191, 255, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 191, 255, 0.08) 1px, transparent 1px);
  background-size: cover, 40px 40px, 40px 40px;
}

/* ---------- Custom Button Styles (design.md components) ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-neutral);
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary:hover {
  background-color: var(--color-primary-600);
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
  color: var(--color-tertiary);
}
.btn-primary:active {
  transform: translateY(0) scale(0.99);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
  text-decoration: none;
}
.btn-secondary:hover {
  background-color: rgba(0, 51, 102, 0.06);
  transform: translateY(-1px);
}

.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-surface);
  color: var(--color-primary-700);
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--dur-fast) var(--ease-out);
  text-decoration: none;
}
.btn-accent:hover {
  background-color: var(--color-surface-600);
  color: var(--color-tertiary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ---------- Cards ---------- */
.card {
  background-color: var(--color-tertiary);
  border: 1px solid var(--color-neutral);
  border-radius: var(--r-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 191, 255, 0.35);
}

/* ---------- Service Card Hover Highlight ---------- */
.service-card {
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 0%;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-surface));
  transition: height var(--dur-base) var(--ease-out);
}
.service-card:hover::before {
  height: 100%;
}

/* ---------- Input / Form (design.md) ---------- */
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary-700);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--color-neutral);
  border-radius: var(--r-md);
  background-color: var(--color-tertiary);
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: all var(--dur-fast) var(--ease-out);
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-surface);
  box-shadow: 0 0 0 2px rgba(0, 191, 255, 0.18);
}
.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ---------- Navigation Active State ---------- */
.nav-link {
  position: relative;
  padding: 0.4rem 0.1rem;
  font-weight: 500;
  color: var(--color-accent);
  transition: color var(--dur-fast) var(--ease-out);
  text-decoration: none;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

/* ---------- Entry Animation (design.md) ---------- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  animation: fadeUp var(--dur-slow) var(--ease-out) both;
}

.delay-1 { animation-delay: 80ms; }
.delay-2 { animation-delay: 160ms; }
.delay-3 { animation-delay: 240ms; }
.delay-4 { animation-delay: 320ms; }
.delay-5 { animation-delay: 400ms; }
.delay-6 { animation-delay: 480ms; }

/* ---------- Staggered list entry ---------- */
.stagger-item {
  opacity: 0;
  transform: translateY(16px);
}
.stagger-item.in-view {
  animation: fadeUp var(--dur-slow) var(--ease-out) both;
}

/* ---------- Team / Project Image Placeholder SVG Base ---------- */
.avatar-placeholder {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: linear-gradient(135deg, var(--color-mist) 0%, var(--color-neutral) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--r-md);
}
.avatar-placeholder svg {
  width: 55%;
  height: 55%;
  opacity: 0.55;
  color: var(--color-primary);
}

/* ---------- SVG Placeholder for Photos ---------- */
.img-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(to right, rgba(0, 51, 102, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 51, 102, 0.06) 1px, transparent 1px),
    linear-gradient(135deg, #eef4fa 0%, #d8e6f2 100%);
  background-size: 20px 20px, 20px 20px, 100% 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  border-radius: var(--r-md);
}
.img-placeholder svg {
  width: 22%;
  color: var(--color-primary);
  opacity: 0.4;
}
.img-placeholder .badge-meta {
  position: absolute;
  top: 0.5rem; left: 0.5rem;
  padding: 0.2rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background-color: var(--color-primary);
  color: var(--color-tertiary);
  border-radius: var(--r-sm);
}

/* ---------- Filter Pills ---------- */
.filter-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background-color: var(--color-mist);
  color: var(--color-accent);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
  border: 1px solid transparent;
}
.filter-pill:hover {
  background-color: rgba(0, 51, 102, 0.08);
  color: var(--color-primary);
}
.filter-pill.is-active {
  background-color: var(--color-primary);
  color: var(--color-tertiary);
  box-shadow: var(--shadow-sm);
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 10, 22, 0.92);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out);
}
.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}
.lightbox img,
.lightbox .lb-placeholder {
  max-width: min(92vw, 1100px);
  max-height: 86vh;
  border-radius: var(--r-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  transform: scale(0.96);
  transition: transform var(--dur-base) var(--ease-out);
}
.lightbox.is-open img,
.lightbox.is-open .lb-placeholder {
  transform: scale(1);
}
.lightbox-close {
  position: absolute;
  top: 1.25rem; right: 1.25rem;
  width: 44px; height: 44px;
  border-radius: 50%;
  background-color: rgba(255,255,255,0.12);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out);
}
.lightbox-close:hover {
  background-color: rgba(255,255,255,0.22);
}

/* ---------- Section Spacing (design.md) ---------- */
.section-pad {
  padding-top: clamp(3rem, 7vw, 6rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

/* ---------- Eyebrow / Section Label ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-surface-600);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  background-color: rgba(0, 191, 255, 0.12);
  border-radius: var(--r-sm);
  margin-bottom: 1rem;
}

/* ---------- Utility: Hidden scrollbars for sliders ---------- */
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

/* ---------- Map embed wrapper ---------- */
.map-embed {
  filter: grayscale(0.15) contrast(1.05);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-neutral);
}

/* ---------- Mobile nav drawer ---------- */
.mobile-drawer {
  position: fixed;
  top: 0; right: 0;
  width: min(84vw, 320px);
  height: 100dvh;
  background-color: var(--color-tertiary);
  box-shadow: -12px 0 32px rgba(0, 51, 102, 0.12);
  z-index: 210;
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-out);
  display: flex;
  flex-direction: column;
}
.mobile-drawer.is-open {
  transform: translateX(0);
}
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 34, 68, 0.5);
  z-index: 205;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out);
}
.drawer-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- Project Card Overlay ---------- */
.project-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
  cursor: pointer;
}
.project-card .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,34,68,0.88) 0%, rgba(0,34,68,0.2) 55%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.25rem;
  color: #fff;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}
.project-card:hover .overlay {
  opacity: 1;
}

/* ---------- Gallery item hover zoom ---------- */
.gallery-thumb {
  cursor: pointer;
  overflow: hidden;
  border-radius: var(--r-md);
}
.gallery-thumb img,
.gallery-thumb .img-placeholder {
  transition: transform var(--dur-slow) var(--ease-out);
}
.gallery-thumb:hover img,
.gallery-thumb:hover .img-placeholder {
  transform: scale(1.05);
}

/* ---------- Scroll-to-top button ---------- */
.scroll-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 48px; height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 99;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--dur-base) var(--ease-out);
  box-shadow: var(--shadow-primary);
}
.scroll-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.scroll-top:hover {
  background-color: var(--color-primary-600);
}

/* ---------- Partners / Clients logo slider ---------- */
@keyframes logoScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.logo-track {
  display: flex;
  width: max-content;
  animation: logoScroll 30s linear infinite;
  gap: 3.5rem;
}