/* =============================================
   Digitly.cz — Clean Minimal Design
   ============================================= */

/* --- Variables --- */
:root {
  --bg: #FAFAFA;
  --bg-alt: #F2F2F0;
  --text: #1A1A1A;
  --text-muted: #6B6B6B;
  --accent: #2563EB;
  --accent-light: #DBEAFE;
  --border: #E5E5E5;
  --white: #FFFFFF;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* --- Navigation --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 56px;
  height: 72px;
  backdrop-filter: blur(16px);
  background: rgba(250, 250, 250, 0.92);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}

nav.scrolled {
  border-color: var(--border);
}

nav.menu-open {
  background: transparent;
  backdrop-filter: none;
  border-color: transparent;
}

.logo {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  z-index: 201;
  transition: color 0.3s;
}

.logo span {
  color: var(--accent);
  transition: color 0.3s;
}

nav.menu-open .logo {
  color: var(--white);
}

nav.menu-open .logo span {
  color: var(--accent);
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  z-index: 201;
  transition: transform 0.3s;
  flex-shrink: 0;
}

.nav-toggle:hover {
  transform: scale(1.08);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--white);
  border-radius: 1px;
  position: absolute;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle span:first-child {
  transform: translateY(-3px);
}

.nav-toggle span:last-child {
  transform: translateY(3px);
}

.nav-toggle.active span:first-child {
  transform: translateY(0) rotate(45deg);
}

.nav-toggle.active span:last-child {
  transform: translateY(0) rotate(-45deg);
}

/* --- Menu Overlay --- */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 190;
  background: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.menu-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.menu-inner {
  text-align: center;
}

.menu-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 48px;
}

.menu-links a {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 600;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color 0.2s;
  display: inline-block;
}

.menu-links a:hover {
  color: var(--accent);
}

.menu-contact p {
  font-size: 0.9rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.8;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 160px 56px 120px;
  max-width: 820px;
  margin: 0 auto;
}

.hero-tag {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.8rem, 5.5vw, 4.5rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text);
}

.hero-desc {
  margin-top: 28px;
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 520px;
}

.hero-actions {
  margin-top: 48px;
  display: flex;
  gap: 16px;
  align-items: center;
}

/* --- Buttons --- */
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: var(--text);
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 6px;
  border: none;
  transition: all 0.25s;
}

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

.btn-ghost {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s;
}

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

.btn-ghost::after {
  content: '\2192';
  transition: transform 0.2s;
}

.btn-ghost:hover::after {
  transform: translateX(4px);
}

/* --- Section Base --- */
section {
  padding: 100px 56px;
}

.section-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* --- Work / Portfolio --- */
.work {
  background: var(--white);
}

.work-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 48px;
}

.work-link {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s;
}

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

.work-link::after {
  content: '\2192';
}

.work-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.work-card {
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s;
}

.work-card:hover {
  transform: translateY(-4px);
}

/* --- Device Mockup (Notebook Frame) --- */
.device-mockup {
  background: #1A1A1A;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  transition: box-shadow 0.3s;
}

.work-card:hover .device-mockup {
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.16);
}

.device-top {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: #2A2A2A;
}

.device-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3D3D3D;
}

.device-dot:first-child { background: #FF5F57; }
.device-dot:nth-child(2) { background: #FFBD2E; }
.device-dot:nth-child(3) { background: #28CA41; }

.device-url {
  margin-left: 12px;
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.06);
  padding: 3px 12px;
  border-radius: 4px;
  flex: 1;
  text-align: center;
}

.device-screen {
  height: 340px;
  overflow: hidden;
}

.device-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.5s cubic-bezier(.25, .46, .45, .94);
}

.work-card:hover .device-screen img {
  transform: scale(1.03);
}

.work-info {
  padding: 16px 4px;
}

.work-tag {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 4px;
}

.work-name {
  font-size: 1.1rem;
  font-weight: 500;
}

/* --- CTA Section (homepage) --- */
.cta-section {
  background: var(--bg-alt);
  padding: 120px 56px;
  text-align: center;
}

.cta-inner {
  max-width: 700px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 36px;
}

.cta-btn {
  padding: 18px 48px;
  font-size: 0.92rem;
}

/* --- Contact Page (two-column) --- */
.contact-page {
  background: var(--white);
  padding: 140px 56px 100px;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  max-width: 1100px;
  margin: 0 auto;
}

.contact-heading {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 40px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.contact-block {
  padding: 28px 0;
  border-top: 1px solid var(--border);
}

.contact-block:last-child {
  border-bottom: none;
}

.contact-detail-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.contact-detail-value {
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.6;
}

.contact-detail-note {
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 10px;
}

.contact-detail-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--border);
}

.contact-detail-row .contact-block {
  border-top: none;
}

.contact-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
  transition: opacity 0.2s;
}

.contact-link:hover {
  opacity: 0.7;
}

.contact-form-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
}

/* --- Contact Form --- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  overflow: hidden;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  transition: border-color 0.25s;
  outline: none;
  -webkit-appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #B0B0B0;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--text);
}

.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid {
  border-color: #DC2626;
}

.form-group select {
  color: var(--text-muted);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B6B6B' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0 center;
  padding-right: 24px;
}

.form-group select option {
  background: var(--white);
  color: var(--text);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
}

.form-group textarea:focus {
  border-color: var(--text);
}

.form-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
}

.form-submit {
  cursor: pointer;
  padding: 16px 40px;
}

.form-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-status {
  margin-top: 12px;
  font-size: 0.85rem;
  font-weight: 400;
  min-height: 24px;
}

.form-status.success {
  color: #16A34A;
}

.form-status.error {
  color: #DC2626;
}

/* --- Footer --- */
footer {
  background: var(--text);
  color: rgba(255, 255, 255, 0.5);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  padding: 64px 56px 48px;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 12px;
}

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

.footer-desc {
  font-size: 0.88rem;
  font-weight: 300;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.4);
  max-width: 300px;
}

.footer-col-title {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.25);
  margin-bottom: 16px;
}

.footer-col-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-links li {
  font-size: 0.88rem;
  font-weight: 300;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col-links a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-col-links a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 56px;
}

.footer-copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.2);
}

/* --- Animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  nav { padding: 0 32px; }
  section { padding: 80px 32px; }

  .hero { padding: 140px 32px 80px; }
  .work-grid { gap: 16px; }
  .contact-page { padding: 120px 32px 80px; }
  .contact-layout { gap: 48px; }

  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px; padding: 48px 32px 40px; }
  .footer-brand { grid-column: span 2; }
  .footer-bottom { padding: 20px 32px; }
}

@media (max-width: 768px) {
  .work-grid { grid-template-columns: 1fr; }
  .contact-page { padding: 100px 32px 60px; }
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
  .contact-detail-row { grid-template-columns: 1fr; }

  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand { grid-column: auto; }
}

@media (max-width: 640px) {
  nav { padding: 0 20px; }

  section { padding: 60px 20px; }

  .hero { padding: 120px 20px 60px; }
  .hero-title { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-actions { flex-direction: column; }

  .work-header { flex-direction: column; align-items: start; gap: 12px; }

  .form-row { grid-template-columns: 1fr; }

  .footer-top { padding: 40px 20px 32px; }
  .footer-bottom { padding: 20px 20px; }

  .nav-toggle { width: 40px; height: 40px; }
  .nav-toggle span { width: 16px; }
}