/* ==========================================================================
   Дом Ремонт — Модерен статичен CSS (Mobile-First)
   Създаден за демонстрационен уебсайт за начинаещи (HTML5 + CSS3 + минимален JS)
   ========================================================================== */

:root {
  /* Цветова палитра (60% бял фон, 30% структурни сиви/тъмни тонове, 10% оранжев акцент) */
  --color-bg: #ffffff;
  --color-surface: #faf8f5;
  --color-surface-elevated: #f3efe9;
  --color-text: #161615;
  --color-text-secondary: #4a4945;
  --color-text-muted: #6e6c66;
  --color-border: #e5e0d8;
  --color-border-strong: #d0c9be;

  /* Оранжев акцент с висок контраст (WCAG AA съвместим с бял текст) */
  --color-accent: #d4490b;
  --color-accent-hover: #b33b06;
  --color-accent-soft: #fff3ed;
  --color-accent-border: #f5cdb6;

  /* Типография */
  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Размери и отстояния */
  --container-max: 1180px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  /* Анимации */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 160ms;
}

/* Базово нулиране (Reset) */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  font-feature-settings: 'cv02', 'cv03', 'cv04';
  overflow-x: hidden;
}

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

/* Достъпност: Видим фокус контур при навигация с клавиатура */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Връзка за прескачане към основното съдържание (Skip Link) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 200;
  background-color: var(--color-text);
  color: #ffffff;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  transition: transform var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  top: 0.75rem;
}

/* Типографска йерархия */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--color-text);
  line-height: 1.18;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.65rem, 2.8vw, 2.35rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.35rem);
  font-weight: 600;
}

p {
  color: var(--color-text-secondary);
  max-width: 68ch;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

/* Контейнери и секции */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section {
  padding-block: 4rem;
  border-bottom: 1px solid var(--color-border);
}

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

.section-header {
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.section-kicker {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.01em;
}

.meta-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.meta-separator {
  color: var(--color-border-strong);
  user-select: none;
}

/* Бутони и интерактивни връзки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  min-height: 44px;
  transition:
    transform var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

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

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
}

.btn-secondary {
  background-color: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  background-color: var(--color-surface);
  border-color: var(--color-text);
}

.btn-subtle {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
  padding: 0.5rem 0.95rem;
  font-size: 0.875rem;
}

.btn-subtle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
}

/* ==========================================================================
   Хедър и Навигация (Top Bar Contract + No-JS поддръжка)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 64px;
  padding-block: 0.5rem;
}

/* Зона 1: Единствен текстов елемент за името на бранда */
.brand-wordmark {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

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

/* Зона 2: Навигационни връзки */
.primary-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  padding-block: 0.35rem;
  border-bottom: 2px solid transparent;
  transition:
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

/* Зона 3: Основно действие и мобилен бутон */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.header-cta {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  min-height: 40px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--color-text);
  background-color: var(--color-surface);
}

.nav-toggle-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  fill: none;
}

/* Мобилно поведение (< 768px):
   - При липса на JS (html.no-js) менюто остава видимо на втори ред, за да е винаги използваемо.
   - При наличен JS (html.js) се управлява чрез бутона .nav-toggle. */
@media (max-width: 767px) {
  .header-cta {
    display: none;
  }

  html.no-js .header-inner {
    flex-wrap: wrap;
    padding-block: 0.65rem;
    gap: 0.5rem 1rem;
  }

  html.no-js .primary-nav {
    width: 100%;
    order: 3;
    overflow-x: auto;
    padding-top: 0.25rem;
    border-top: 1px solid var(--color-border);
  }

  html.no-js .nav-list {
    gap: 1rem;
  }

  html.js .nav-toggle {
    display: inline-flex;
  }

  html.js .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.25rem 1.25rem;
    box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.08);
    display: none;
  }

  html.js .primary-nav[data-open='true'] {
    display: block;
  }

  html.js .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  html.js .nav-link {
    display: block;
    padding: 0.65rem 0.5rem;
    border-bottom: 1px solid var(--color-surface-elevated);
  }
}

/* ==========================================================================
   Начална секция (Hero)
   ========================================================================== */
.hero-section {
  padding-block: 2.75rem 4rem;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
  align-items: stretch;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.25rem;
}

.hero-lead {
  font-size: clamp(1.02rem, 1.4vw, 1.15rem);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  padding-top: 0.35rem;
}

.hero-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.hero-media-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface-elevated);
  display: flex;
  flex-direction: column;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  flex: 1;
  background: linear-gradient(135deg, #f3efe9 0%, #e5dfd5 100%);
}

.hero-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-caption {
  padding: 0.75rem 1.15rem;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}

/* Лента с ключови параметри под Hero секцията */
.hero-highlights {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

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

.highlight-title {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text);
}

.highlight-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Секция „Услуги“ (4 основни дейности + учебен интерактивен помощник)
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.service-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  transition:
    transform var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.service-card:hover {
  border-color: var(--color-accent-border);
  transform: translateY(-2px);
}

.service-top {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.service-index {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent);
}

.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.service-list li {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  position: relative;
  padding-left: 1rem;
}

.service-list li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* Интерактивен учебен помощник за подготовка преди ремонт */
.prep-helper {
  margin-top: 2rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.prep-helper-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.prep-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.prep-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  user-select: none;
  min-height: 42px;
  transition:
    border-color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out);
}

.prep-checkbox-label:hover {
  border-color: var(--color-accent);
}

.prep-checkbox-label input[type='checkbox'] {
  accent-color: var(--color-accent);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.prep-output {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.15rem 1.25rem;
}

.prep-output-title {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.9375rem;
  margin-bottom: 0.5rem;
}

.prep-output-list {
  padding-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Секция „За проекта“ (Обяснение на демонстрационния уебсайт)
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

.about-prose {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.about-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.about-step-card {
  padding: 1.35rem 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.about-step-card h3 {
  font-size: 1.05rem;
}

/* ==========================================================================
   Секция „Демонстрационни проекти“
   ========================================================================== */
.projects-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.filter-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.3rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.filter-btn {
  background: transparent;
  border: none;
  padding: 0.5rem 0.9rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
  min-height: 38px;
  transition:
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.filter-btn:hover {
  color: var(--color-text);
}

.filter-btn[aria-pressed='true'] {
  background-color: var(--color-accent);
  color: #ffffff;
}

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

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.project-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition:
    transform var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.project-card[hidden] {
  display: none !important;
}

.project-card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.project-media {
  aspect-ratio: 4 / 3;
  background-color: var(--color-surface-elevated);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 200ms var(--ease-out);
}

.project-card:hover .project-media img {
  transform: scale(1.02);
}

.project-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.75rem;
}

.project-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

/* Диалогов прозорец (<dialog>) за преглед на демонстрационен проект */
.project-dialog {
  margin: auto;
  width: min(92vw, 620px);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  color: var(--color-text);
  padding: 0;
  box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.18);
}

.project-dialog::backdrop {
  background-color: rgba(22, 22, 21, 0.55);
}

.dialog-inner {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.dialog-close {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  min-height: 38px;
}

.dialog-close:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.dialog-steps {
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.dialog-tip {
  background-color: var(--color-accent-soft);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  font-size: 0.875rem;
  color: var(--color-text);
}

/* ==========================================================================
   Секция „Контакти“ (Примерни данни без фалшива контактна форма)
   ========================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.contact-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.contact-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.contact-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.contact-value {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  word-break: break-word;
}

.contact-card-actions {
  margin-top: 0.35rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.copy-feedback {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
}

.static-hosting-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.code-structure-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.code-structure-list li {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.code-structure-list code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8125rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  color: var(--color-text);
}

/* ==========================================================================
   Футър (Footer)
   ========================================================================== */
.site-footer {
  background-color: var(--color-surface);
  padding-block: 2.75rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Адаптивни точки (Responsive Breakpoints: Tablet & Desktop)
   ========================================================================== */
@media (min-width: 640px) {
  .hero-highlights {
    grid-template-columns: repeat(2, 1fr);
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .section {
    padding-block: 5.25rem;
  }

  .hero-section {
    padding-block: 4rem 4.75rem;
  }

  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
  }

  .hero-highlights {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Асиметрична Bento решетка за 4-те услуги */
  .services-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
  }

  .service-card-wide {
    grid-column: span 7;
  }

  .service-card-narrow {
    grid-column: span 5;
  }

  .about-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3rem;
  }

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

  .contact-layout {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 2.5rem;
  }
}

/* ==========================================================================
   Зачитане на prefers-reduced-motion (Достъпност)
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}