/* ============================================
   Prague Planning — Furniture & Apartment Consultant
   Clean, architectural, minimalist design
   Mobile-first, responsive
   ============================================ */

/* CSS Custom Properties */
:root {
  --color-bg: #fafafa;
  --color-bg-alt: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #5c5c5c;
  --color-accent: #2c3e50;
  --color-accent-light: #3d5a73;
  --color-accent-warm: #8b6914;
  --color-accent-warm-light: #a67c1a;
  --color-border: #e8e8e8;
  --color-hero-overlay: rgba(26, 26, 26, 0.4);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Archivo', var(--font-sans);
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --max-width: 1140px;
  --transition: 0.25s ease;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --radius: 4px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

a:hover {
  color: var(--color-accent-light);
}

ul {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
  gap: var(--space-md);
}

.header__inner .nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header__inner .nav .lang-switcher {
  margin-left: auto;
  padding-left: var(--space-xl);
  flex-shrink: 0;
}

.logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

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

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.lang-switcher__btn {
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: var(--font-sans);
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}

.lang-switcher__btn:hover {
  color: var(--color-text);
}

.lang-switcher__btn.is-active {
  color: var(--color-accent);
  background: rgba(44, 62, 80, 0.08);
}

.lang-switcher__sep {
  color: var(--color-border);
  font-weight: 300;
  user-select: none;
}

.nav__list {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__list a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.nav__list a:hover {
  color: var(--color-text);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  transition: transform var(--transition);
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__toggle--open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle--open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle--open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2c3e50 0%, #1a252f 50%, #0d1419 100%);
  padding: calc(4rem + 2vw) var(--space-md) var(--space-xl);
  overflow: hidden;
}

.hero__pattern {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.9;
  pointer-events: none;
}

.hero__pattern svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(ellipse at 30% 50%, rgba(61, 90, 115, 0.25) 0%, transparent 50%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 42rem;
}

.hero__headline {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: #ffffff;
  margin-bottom: var(--space-md);
}

.hero__subheadline {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-lg);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: #ffffff;
  color: var(--color-accent);
  border: 2px solid transparent;
}

.btn--primary:hover {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-warm);
  color: var(--color-accent);
}

/* Sections */
.section {
  padding: var(--space-xl) 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-top: 0;
  margin-bottom: var(--space-md);
  color: var(--color-text);
  position: relative;
  display: block;
  max-width: 100%;
}

.section__title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 2.5rem;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-warm), var(--color-accent-warm-light));
  border-radius: 2px;
}

.section__intro {
  display: block;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 42rem;
  margin-top: 0;
  margin-bottom: var(--space-lg);
}

/* About */
.about__grid {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
}

.about__text {
  display: block;
  margin-top: 0;
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
}

.about__text + .about__text {
  margin-top: 0.25em;
}

.about__text:last-of-type {
  margin-bottom: 0;
}

.about__visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  justify-content: center;
}

.about__plan-frame {
  position: relative;
  width: 100%;
  max-width: 14rem;
}

.about__photo-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #e8e8e8 0%, #f0f0f0 100%);
  border: 2px dashed var(--color-border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.about__photo-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about__photo-placeholder-text {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  opacity: 0.7;
}

.about__photo-placeholder:has(img) .about__photo-placeholder-text {
  display: none;
}

.about__plan-deco {
  position: absolute;
  bottom: -0.5rem;
  right: -0.5rem;
  width: 5rem;
  height: 4rem;
  color: var(--color-accent);
  opacity: 0.35;
  pointer-events: none;
}

.about__card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 12rem;
  height: 12rem;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  border-radius: 8px;
  color: #ffffff;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.about__stat {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.about__stat-label {
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0.9;
  margin-top: 0.25rem;
}

/* Services */
.services__grid {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.service-card {
  position: relative;
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-warm), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  border-color: rgba(44, 62, 80, 0.2);
  box-shadow: var(--shadow-sm);
}

.service-card:hover::before {
  opacity: 0.6;
}

.service-card__icon {
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: var(--space-md);
  color: var(--color-accent);
}

.service-card__icon svg {
  width: 100%;
  height: 100%;
}

.service-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.service-card__text {
  display: block;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* History */
.history__content {
  display: block;
  max-width: 42rem;
  margin-top: 0;
}

.history__text {
  display: block;
  margin-top: 0;
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
}

.history__text + .history__text {
  margin-top: 0.25em;
}

.history__text:last-child {
  margin-bottom: 0;
}

/* Why Us */
.why-us__content {
  max-width: 40rem;
}

.why-us__text {
  display: block;
  margin-top: 0;
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
}

.why-us__text + .why-us__text {
  margin-top: 0.25em;
}

.why-us__list {
  margin-top: var(--space-lg);
  padding-left: 1.25rem;
}

.why-us__list li {
  position: relative;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-sm);
}

.why-us__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 4px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* Contact */
.contact__intro {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.contact__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.contact__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.contact__value {
  font-size: 1.125rem;
  font-weight: 500;
}

.contact__value[href]:hover {
  text-decoration: underline;
}

.contact__cta {
  display: inline-block;
}

/* Footer */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.footer__text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Responsive — Tablet and up */
@media (min-width: 640px) {
  .about__grid {
    grid-template-columns: 1fr auto;
  }

  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .contact__details {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .contact__item {
    min-width: 12rem;
  }
}

/* Responsive — Mobile nav */
@media (max-width: 639px) {
  .nav__toggle {
    display: flex;
  }

  .nav__list {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: var(--space-md);
    background: rgba(250, 250, 250, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav__list--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__list a {
    display: block;
    padding: var(--space-md);
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border);
  }

  .nav__list a:last-child {
    border-bottom: none;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }
}

/* Responsive — Desktop */
@media (min-width: 900px) {
  .section {
    padding: var(--space-2xl) 0;
  }

  .hero__headline {
    margin-bottom: var(--space-md);
  }
}