/* ============================
   ODJETO.CZ — Presentation Web
   ============================ */

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1E293B;
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  border-radius: 10px;
  padding: 10px 24px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn--primary {
  background: #0EA5E9;
  color: #fff;
  border-color: #0EA5E9;
}

.btn--primary:hover {
  background: #0284C7;
  border-color: #0284C7;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.btn--outline {
  background: transparent;
  color: #0EA5E9;
  border-color: #0EA5E9;
}

.btn--outline:hover {
  background: #0EA5E9;
  color: #fff;
  transform: translateY(-1px);
}

.btn--lg {
  font-size: 16px;
  padding: 14px 32px;
  border-radius: 12px;
}

/* --- Section Titles --- */
.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  color: #0F172A;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  text-align: center;
  color: #64748B;
  max-width: 600px;
  margin: 0 auto 56px;
}

/* ============================
   HEADER
   ============================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.3s ease;
}

.header--scrolled {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: #0F172A;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header__link {
  font-size: 15px;
  font-weight: 500;
  color: #475569;
  transition: color 0.2s;
}

.header__link:hover {
  color: #0EA5E9;
}

.header__cta {
  font-size: 14px;
  padding: 8px 20px;
}

.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #334155;
  border-radius: 2px;
  transition: all 0.3s ease;
}

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

.header__hamburger.active span:nth-child(2) {
  opacity: 0;
}

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

/* ============================
   HERO
   ============================ */
.hero {
  padding: 120px 0 80px;
  background: linear-gradient(135deg, #F0F9FF 0%, #fff 50%, #F0F9FF 100%);
  overflow: hidden;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.hero__title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.1;
  color: #0F172A;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero__subtitle {
  font-size: 1.2rem;
  color: #475569;
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__visual {
  display: flex;
  justify-content: center;
}

.mockup-svg {
  width: 100%;
  max-width: 560px;
  border-radius: 12px;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.08);
}

/* ============================
   FEATURES
   ============================ */
.features {
  padding: 100px 0;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  padding: 32px;
  border-radius: 16px;
  border: 1px solid #E2E8F0;
  background: #fff;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: #BAE6FD;
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.08);
  transform: translateY(-4px);
}

.feature-card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #F0F9FF;
  border-radius: 12px;
  margin-bottom: 20px;
}

.feature-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 8px;
}

.feature-card__text {
  font-size: 0.95rem;
  color: #64748B;
  line-height: 1.6;
}

/* ============================
   SCREENSHOTS
   ============================ */
.screenshots {
  padding: 100px 0;
  background: #F8FAFC;
}

.screenshots__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.screenshot-card {
  position: relative;
}

.screenshot-card--mobile {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.screenshot-card__label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #64748B;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  text-align: center;
}

.mockup-svg--sm {
  max-width: 100%;
  border-radius: 10px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.mockup-svg--mobile {
  max-width: 240px;
  border-radius: 24px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15);
}

/* ============================
   BENEFITS
   ============================ */
.benefits {
  padding: 100px 0;
}

.benefits__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.benefit {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  border-radius: 12px;
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  transition: all 0.2s ease;
}

.benefit:hover {
  border-color: #BAE6FD;
  background: #F0F9FF;
}

.benefit__check {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34, 197, 94, 0.1);
  border-radius: 8px;
  margin-top: 2px;
}

.benefit__title {
  font-size: 1rem;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 4px;
}

.benefit__text {
  font-size: 0.9rem;
  color: #64748B;
  line-height: 1.5;
}

/* ============================
   HOW IT WORKS
   ============================ */
.how-it-works {
  padding: 100px 0;
  background: #F8FAFC;
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  margin-bottom: 48px;
}

.step {
  text-align: center;
  max-width: 260px;
  padding: 0 24px;
}

.step__number {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0EA5E9;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 800;
  border-radius: 50%;
  margin: 0 auto 20px;
}

.step__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 8px;
}

.step__text {
  font-size: 0.95rem;
  color: #64748B;
  line-height: 1.6;
}

.step__connector {
  width: 80px;
  height: 2px;
  background: #CBD5E1;
  flex-shrink: 0;
  margin-top: 28px;
}

.how-it-works__cta {
  text-align: center;
}

/* ============================
   CONTACT
   ============================ */
.contact {
  padding: 100px 0;
}

.contact-form {
  position: relative;
  max-width: 520px;
  margin: 0 auto;
}

.contact-form__group {
  margin-bottom: 20px;
}

.contact-form__label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 6px;
}

.contact-form__input {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  padding: 12px 16px;
  border: 2px solid #E2E8F0;
  border-radius: 10px;
  background: #fff;
  color: #0F172A;
  transition: border-color 0.2s;
  outline: none;
}

.contact-form__input::placeholder {
  color: #94A3B8;
}

.contact-form__input:focus {
  border-color: #0EA5E9;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.contact-form__input.invalid {
  border-color: #EF4444;
}

.contact-form__input.invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.contact-form__textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form__error {
  display: block;
  font-size: 0.8rem;
  color: #EF4444;
  margin-top: 4px;
  min-height: 1.2em;
}

.contact-form__submit {
  width: 100%;
  margin-top: 8px;
}

.contact-form__submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.contact-form__status {
  text-align: center;
  margin-top: 16px;
  font-size: 0.95rem;
  min-height: 1.5em;
}

.contact-form__status--success {
  color: #22C55E;
  font-weight: 600;
}

.contact-form__status--error {
  color: #EF4444;
}

/* ============================
   FOOTER
   ============================ */
.footer {
  background: #0F172A;
  color: #94A3B8;
  padding: 56px 0 32px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}

.footer__brand .header__logo span {
  color: #E2E8F0;
}

.footer__desc {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-top: 12px;
  max-width: 320px;
}

.footer__heading {
  font-size: 0.85rem;
  font-weight: 700;
  color: #E2E8F0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.footer__nav,
.footer__app {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__nav a,
.footer__app a {
  font-size: 0.9rem;
  color: #94A3B8;
  transition: color 0.2s;
}

.footer__nav a:hover,
.footer__app a:hover {
  color: #0EA5E9;
}

.footer__bottom {
  grid-column: 1 / -1;
  padding-top: 32px;
  border-top: 1px solid #1E293B;
  font-size: 0.85rem;
  text-align: center;
}

/* ============================
   SCROLL REVEAL
   ============================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

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

/* Tablet */
@media (max-width: 1024px) {
  .hero__title {
    font-size: 2.5rem;
  }

  .hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

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

  .section-title {
    font-size: 2rem;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .header__nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid #E2E8F0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }

  .header__nav.open {
    display: flex;
  }

  .header__link {
    font-size: 1.1rem;
  }

  .header__cta {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero__title {
    font-size: 2.25rem;
  }

  .hero__subtitle {
    margin: 0 auto 28px;
    font-size: 1.05rem;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__visual {
    order: -1;
  }

  .mockup-svg {
    max-width: 400px;
  }

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

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

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

  .steps {
    flex-direction: column;
    align-items: center;
    gap: 24px;
  }

  .step__connector {
    width: 2px;
    height: 40px;
    margin: 0;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .footer__desc {
    max-width: none;
  }

  .footer__nav,
  .footer__app {
    align-items: center;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .btn--lg {
    padding: 12px 28px;
    font-size: 15px;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero__title {
    font-size: 1.85rem;
  }

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .hero__actions .btn {
    width: 100%;
    max-width: 280px;
  }

  .feature-card {
    padding: 24px;
  }
}