/* ═══════════════════════════════════════════════
   Zametem.to – Custom Styles
   Premium web design CSS
═══════════════════════════════════════════════ */

/* ── Root & Reset ── */
*, *::before, *::after { box-sizing: border-box; }

:root {
  --brand:       #1278b3;
  --brand-light: #e8f4fb;
  --brand-dark:  #0b5289;
  --shadow-glow: 0 0 30px rgba(18,120,179,.3);
  --radius-card: 1rem;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; }

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ══════════════════════════════════════════════
   PAGE LOADER
══════════════════════════════════════════════ */
#page-loader {
  transition: opacity .5s ease, visibility .5s ease;
}
#page-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-circle {
  animation: loaderCircle 1.4s ease-in-out infinite;
  transform-origin: center;
  transform-box: fill-box;
}
@keyframes loaderCircle {
  0%   { stroke-dashoffset: 125; }
  50%  { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -125; }
}

.loader-dot {
  animation: loaderDot 1.4s ease-in-out infinite;
}
@keyframes loaderDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%       { transform: scale(1.4); opacity: .7; }
}

.loader-bar {
  width: 120px;
  height: 2px;
  background: #f0f0f0;
  border-radius: 999px;
  overflow: hidden;
}
.loader-bar-fill {
  height: 100%;
  background: var(--brand);
  border-radius: 999px;
  animation: loaderBar 1.6s ease-in-out infinite;
}
@keyframes loaderBar {
  0%   { width: 0%; margin-left: 0%; }
  50%  { width: 80%; margin-left: 0%; }
  100% { width: 0%; margin-left: 100%; }
}

/* ══════════════════════════════════════════════
   NAVBAR
══════════════════════════════════════════════ */
#navbar {
  transform: translateY(0);
  transition: transform .4s ease, background .3s ease, padding .3s ease, box-shadow .3s ease;
}
#navbar.nav-hidden {
  transform: translateY(-110%);
}

#mobile-hamburger {
  transform: translateY(0);
  opacity: 1;
  transition: transform .4s ease, opacity .4s ease;
}
#mobile-hamburger.nav-hidden {
  transform: translateY(-120%);
  opacity: 0;
}

#mobile-menu.open {
  pointer-events: auto !important;
}
#navbar.scrolled {
  background: rgba(255,255,255,.95) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 40px rgba(0,0,0,.08);
  padding-top: 1rem !important;
  padding-bottom: 1rem !important;
}

#navbar.scrolled .nav-link {
  color: #374151 !important;
}
#navbar.scrolled .nav-link:hover {
  color: var(--brand) !important;
}

#navbar.scrolled .nav-logo-text {
  color: #111827 !important;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .3s ease;
  border-radius: 999px;
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Hamburger active state */
#menu-btn.open .hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
#menu-btn.open .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
#menu-btn.open .hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
  width: 1.5rem;
  margin-left: 0;
}

#mobile-menu.open {
  max-height: 400px;
}

/* ══════════════════════════════════════════════
   HERO
══════════════════════════════════════════════ */
.hero-gradient-overlay {
  background: linear-gradient(135deg,
    rgba(18,120,179,.4) 0%,
    rgba(5,43,84,.6) 50%,
    rgba(0,0,0,.7) 100%
  );
}

.hero-h1 {
  font-size: clamp(3rem, 7vw, 6.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
}

.hero-badge.animated   { animation: heroFadeUp .7s .3s var(--ease-out-expo) forwards; }
.hero-h1.animated      { animation: heroFadeUp .8s .5s var(--ease-out-expo) forwards; }
.hero-sub.animated     { animation: heroFadeUp .8s .7s var(--ease-out-expo) forwards; }
.hero-cta.animated     { animation: heroFadeUp .8s .9s var(--ease-out-expo) forwards; }
.hero-stats.animated   { animation: heroFadeUp .8s 1.1s var(--ease-out-expo) forwards; }

@keyframes heroFadeUp {
  from   { opacity:0; transform: translateY(30px); }
  to     { opacity:1; transform: translateY(0); }
}

/* Scroll indicator line */
.scroll-line {
  animation: scrollLine 2.2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0) translateY(0); transform-origin: top; }
  50%  { transform: scaleY(1) translateY(0); transform-origin: top; }
  51%  { transform-origin: bottom; }
  100% { transform: scaleY(0) translateY(0); transform-origin: bottom; }
}

/* ══════════════════════════════════════════════
   SECTION COMPONENTS
══════════════════════════════════════════════ */
.section-badge {
  display: inline-block;
  background: var(--brand-light);
  color: var(--brand);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: .45rem 1.25rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
.section-badge-dark {
  display: inline-block;
  background: rgba(18,120,179,.2);
  color: #73bde7;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: .45rem 1.25rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(18,120,179,.3);
}

.section-title {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2.25rem, 4.5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.03em;
  color: #111827;
  margin-bottom: 1.25rem;
}

.section-sub {
  color: #9ca3af;
  font-size: 1.125rem;
  line-height: 1.75;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ══════════════════════════════════════════════
   SCROLL REVEAL ANIMATIONS
══════════════════════════════════════════════ */
.reveal,
.reveal-left,
.reveal-right,
.reveal-stagger {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .8s var(--ease-out-expo), transform .8s var(--ease-out-expo);
}
@media (min-width: 768px) {
  .reveal-left  { transform: translateX(-40px); }
  .reveal-right { transform: translateX( 40px); }
}

.reveal.in-view,
.reveal-left.in-view,
.reveal-right.in-view,
.reveal-stagger.in-view {
  opacity: 1;
  transform: translate(0);
}

.reveal-stagger.in-view {
  transition-delay: var(--delay, 0ms);
}

/* ══════════════════════════════════════════════
   STAT CARDS
══════════════════════════════════════════════ */
.stat-card {
  transition: transform .5s var(--ease-out-expo), background .5s ease;
}
.stat-card:hover {
  transform: translateY(-6px);
}

/* ══════════════════════════════════════════════
   SERVICE CARDS
══════════════════════════════════════════════ */
.service-card {
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--brand-light) 0%, transparent 100%);
  opacity: 0;
  transition: opacity .5s ease;
  border-radius: var(--radius-card);
}
.service-card:hover::before {
  opacity: 1;
}

/* ══════════════════════════════════════════════
   GALLERY
══════════════════════════════════════════════ */
.gallery-filter-btn {
  padding: .5rem 1.25rem;
  border-radius: 999px;
  border: 1.5px solid #e5e7eb;
  font-size: .8125rem;
  font-weight: 500;
  color: #6b7280;
  background: white;
  cursor: pointer;
  transition: all .25s ease;
}
.gallery-filter-btn:hover {
  border-color: var(--brand);
  color: var(--brand);
}
.gallery-filter-btn.active {
  background: var(--brand);
  border-color: var(--brand);
  color: white;
}

.gallery-item {
  transition: opacity .4s ease, transform .4s ease;
}
.gallery-item.hidden {
  opacity: 0; pointer-events: none;
  transform: scale(.96);
}

/* Image placeholders */
.img-placeholder {
  display: flex !important;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e8f4fb 0%, #c5e3f5 100%);
}
.img-placeholder::after {
  content: '📷';
  font-size: 2rem;
  opacity: .4;
}
.img-placeholder-dark {
  display: flex !important;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a2a3a 0%, #0d1e2e 100%);
}
.img-placeholder-dark::after {
  content: '🏗';
  font-size: 3rem;
  opacity: .3;
}

/* ══════════════════════════════════════════════
   LIGHTBOX
══════════════════════════════════════════════ */
.lightbox {
  display: none;
}
.lightbox.active {
  display: flex;
  animation: fadeIn .3s ease;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.lightbox-content {
  animation: lightboxIn .4s var(--ease-out-expo);
}
@keyframes lightboxIn {
  from { opacity: 0; transform: scale(.92) translateY(20px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* ══════════════════════════════════════════════
   MACHINE TABS
══════════════════════════════════════════════ */
.machine-tab {
  padding: .625rem 1.25rem;
  border-radius: 999px;
  border: 1.5px solid rgba(255,255,255,.15);
  font-size: .8125rem;
  font-weight: 500;
  color: rgba(255,255,255,.5);
  background: transparent;
  cursor: pointer;
  transition: all .25s ease;
}
.machine-tab:hover {
  border-color: rgba(255,255,255,.4);
  color: rgba(255,255,255,.8);
}
.machine-tab.active {
  background: var(--brand);
  border-color: var(--brand);
  color: white;
  box-shadow: 0 0 20px rgba(18,120,179,.4);
}

.spec-card {
  transition: background .3s ease, border-color .3s ease;
}
.spec-card:hover {
  background: rgba(18,120,179,.15);
  border-color: rgba(18,120,179,.4);
}

/* ══════════════════════════════════════════════
   MACHINE SCROLL STORYTELLING
══════════════════════════════════════════════ */
#ms-img {
  transition: opacity .4s ease, transform .5s ease;
}
#ms-info {
  transition: opacity .5s ease, transform .5s ease;
}
.ms-dot {
  transition: background .3s ease, transform .3s ease;
}
.ms-nav-dot {
  transition: border-color .3s ease, color .3s ease, background .3s ease;
}
#ms-progress-bar {
  transition: width .4s cubic-bezier(.4,0,.2,1);
}

/* Desktop: obrázek plná výška */
@media (min-width: 1024px) {
  #technika-sticky .relative.rounded-2xl,
  #technika-sticky .relative.rounded-3xl {
    height: 460px !important;
    max-height: none !important;
  }
}

/* Sticky kontejner — vertikální zarovnání na mobilu */
#technika-sticky {
  padding-top: 80px; /* pod navbar */
  padding-bottom: 16px;
}
@media (min-width: 1024px) {
  #technika-sticky {
    padding-top: 0;
    padding-bottom: 0;
  }
}

/* ══════════════════════════════════════════════
   TESTIMONIALS
══════════════════════════════════════════════ */
#testimonials-container {
  overflow: hidden;
}
.testimonials-track {
  will-change: transform;
}
.dot {
  cursor: pointer;
  transition: all .3s ease;
}
.dot.active {
  width: 1.5rem;
  background: var(--brand);
  border-radius: 999px;
}

/* ══════════════════════════════════════════════
   CONTACT FORM
══════════════════════════════════════════════ */
.form-label {
  display: block;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #374151;
  margin-bottom: .5rem;
}

.form-input {
  width: 100%;
  padding: .875rem 1rem;
  border: 1.5px solid #e5e7eb;
  border-radius: .75rem;
  font-size: .875rem;
  color: #111827;
  background: #fafafa;
  outline: none;
  transition: border-color .25s ease, background .25s ease, box-shadow .25s ease;
  font-family: 'Inter', sans-serif;
  appearance: none;
  -webkit-appearance: none;
}
.form-input:focus {
  border-color: var(--brand);
  background: white;
  box-shadow: 0 0 0 3px rgba(18,120,179,.12);
}
.form-input.invalid {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239,68,68,.1);
}
.form-input.valid {
  border-color: #10b981;
}
.form-input::placeholder { color: #9ca3af; }

select.form-input { cursor: pointer; }

.form-group { position: relative; }

/* ══════════════════════════════════════════════
   STICKY CTA
══════════════════════════════════════════════ */
#quick-contact-widget {
  transition: transform .5s var(--ease-out-expo), opacity .5s ease;
}
#quick-contact-widget.visible {
  transform: translateY(0);
  opacity: 1;
}

/* ══════════════════════════════════════════════
   PARALLAX ELEMENTS
══════════════════════════════════════════════ */
[data-parallax] {
  will-change: transform;
}

/* ══════════════════════════════════════════════
   COUNTER
══════════════════════════════════════════════ */
.counter-wrap { position: relative; display: inline-block; }

/* ══════════════════════════════════════════════
   SELECTION COLORS
══════════════════════════════════════════════ */
::selection {
  background: rgba(18,120,179,.2);
  color: var(--brand-dark);
}

/* ══════════════════════════════════════════════
   CUSTOM SCROLLBAR
══════════════════════════════════════════════ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f5f7f9; }
::-webkit-scrollbar-thumb {
  background: var(--brand);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover { background: var(--brand-dark); }

/* ══════════════════════════════════════════════
   GLASS EFFECT
══════════════════════════════════════════════ */
.glass {
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.15);
}

/* ══════════════════════════════════════════════
   SECTION TRANSITION DIVIDERS
══════════════════════════════════════════════ */
.section-divider {
  width: 60px;
  height: 3px;
  background: var(--brand);
  border-radius: 999px;
  margin: 0 auto 2rem;
}

/* ══════════════════════════════════════════════
   RESPONSIVE TWEAKS
══════════════════════════════════════════════ */
@media (max-width: 768px) {
  .hero-h1 { font-size: clamp(2.25rem, 10vw, 3.5rem); }
  .section-title { font-size: 2.125rem; }
  #hero video { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}