:root {
  --primary: #1a252c;
  --primary-light: #2c3e50;
  --accent: #3498db;
  --accent-hover: #2980b9;
  --danger: #e74c3c;
  --danger-hover: #c0392b;
  --success: #2ecc71;
  --success-hover: #27ae60;
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.14);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background: linear-gradient(135deg, var(--primary) 0%, #0d1b1e 100%);
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header-logo {
  max-width: 100%;
  height: auto;
  max-height: 180px;
  position: relative;
}

nav {
  background: rgba(26, 37, 44, 0.95);
  backdrop-filter: blur(12px);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 3px solid var(--accent);
}

nav .nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
}

nav a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: 1rem 1.6rem;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  transition: var(--transition);
  position: relative;
  white-space: nowrap;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--accent);
  transition: var(--transition);
  border-radius: 2px;
}

nav a:hover, nav a.active {
  color: white;
  background: rgba(255, 255, 255, 0.05);
}

nav a:hover::after, nav a.active::after {
  width: 60%;
}

.container {
  max-width: 1100px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
  flex: 1;
}

.page-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem;
  animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-card h2 {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.6rem;
}

.page-card h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--danger));
  border-radius: 2px;
}

.page-card p {
  color: var(--text-light);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.service-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.service-card img {
  width: 100%;
  height: auto;
  display: block;
}

.service-card .card-body {
  padding: 1.5rem;
}

.service-card h3 {
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-light);
  margin: 0;
}

.cta-button {
  display: inline-block;
  background: linear-gradient(135deg, var(--danger), #c0392b);
  color: white;
  padding: 1rem 2.4rem;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 1px;
  margin-top: 1.5rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(231, 76, 60, 0.35);
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(231, 76, 60, 0.45);
}

.support-btn {
  display: block;
  background: linear-gradient(135deg, var(--danger), #c0392b);
  color: white;
  padding: 1rem 1.8rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0.8rem 0;
  transition: var(--transition);
  text-align: center;
}

.support-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(231, 76, 60, 0.3);
}

.support-btn.blue { background: linear-gradient(135deg, var(--accent), #2c3e50); }
.support-btn.blue:hover { box-shadow: 0 8px 20px rgba(52, 152, 219, 0.3); }
.support-btn.green { background: linear-gradient(135deg, var(--success), #1abc9c); }
.support-btn.green:hover { box-shadow: 0 8px 20px rgba(46, 204, 113, 0.3); }

.contact-detail {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.2rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  margin: 0.8rem 0;
  transition: var(--transition);
}

.contact-detail:hover {
  background: #e8ecf1;
  transform: translateX(6px);
}

.contact-detail .icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}

.contact-detail .icon.blue { background: rgba(52, 152, 219, 0.15); color: var(--accent); }
.contact-detail .icon.green { background: rgba(46, 204, 113, 0.15); color: var(--success); }
.contact-detail .icon.red { background: rgba(231, 76, 60, 0.15); color: var(--danger); }

.contact-detail a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.contact-detail a:hover { text-decoration: underline; }

.social-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1rem 1.2rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid transparent;
}

.social-link:hover {
  border-color: var(--accent);
  background: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.social-link .fab { font-size: 1.4rem; }

.rustdesk-card { margin-top: 1.5rem; }

.rustdesk-card h2 i { color: var(--accent); margin-right: 0.5rem; }

.rd-howto {
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.rd-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.2rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.rd-step:hover { background: #e8ecf1; }

.rd-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #2c3e50);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.rd-step strong { display: block; color: var(--text); font-size: 1rem; }
.rd-step p { margin: 0.15rem 0 0; font-size: 0.9rem; color: var(--text-light); }

.rd-downloads {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.2rem 0 0.5rem;
}

.rd-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  border: 2px solid transparent;
}

.rd-btn.windows { background: #e8ecf1; color: #0078d6; border-color: #0078d6; }
.rd-btn.windows:hover { background: #0078d6; color: white; }
.rd-btn.mac { background: #e8ecf1; color: #555; border-color: #555; }
.rd-btn.mac:hover { background: #555; color: white; }
.rd-btn.linux { background: #e8ecf1; color: #e95420; border-color: #e95420; }
.rd-btn.linux:hover { background: #e95420; color: white; }

.rd-btn .fab { font-size: 1.3rem; }

.badge {
  display: inline-block;
  background: var(--bg);
  color: var(--text-light);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge.warn { background: #fef3cd; color: #856404; }

/* --- Calendar & Time Slots --- */
.cal-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 1.5rem 0;
}

.cal-side h3, .slots-side h3 {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.8rem;
  font-weight: 600;
}

.cal-side h3 i, .slots-side h3 i { color: var(--accent); margin-right: 0.4rem; }

.slots-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.slot-btn {
  padding: 0.75rem;
  border: 2px solid #e0e0e0;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  color: var(--text);
}

.slot-btn:hover:not(.taken) {
  border-color: var(--accent);
  background: rgba(52, 152, 219, 0.05);
}

.slot-btn.selected {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.slot-btn.taken {
  background: #f5f5f5;
  border-color: #e0e0e0;
  color: #bbb;
  cursor: not-allowed;
  position: relative;
}

.slot-btn.taken::after {
  content: 'Unavailable';
  display: block;
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-top: 0.1rem;
  color: #ccc;
}

.no-slots {
  grid-column: 1 / -1;
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-light);
  font-size: 0.9rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
}

.flatpickr-calendar { box-shadow: var(--shadow) !important; border-radius: var(--radius-sm) !important; font-family: 'Poppins', sans-serif !important; }
.flatpickr-months { background: var(--primary) !important; border-radius: var(--radius-sm) var(--radius-sm) 0 0 !important; }
.flatpickr-months .flatpickr-month { height: 50px !important; }
.flatpickr-current-month .flatpickr-monthDropdown-months { font-weight: 600 !important; }
.flatpickr-current-month input.cur-year { font-weight: 600 !important; }
.flatpickr-day.today { border-color: var(--accent) !important; }
.flatpickr-day.selected, .flatpickr-day.startRange, .flatpickr-day.endRange, .flatpickr-day.selected.inRange, .flatpickr-day.startRange.inRange, .flatpickr-day.endRange.inRange, .flatpickr-day.week.selected { background: var(--accent) !important; border-color: var(--accent) !important; }
.flatpickr-day:hover { background: rgba(52, 152, 219, 0.1) !important; }
.flatpickr-day.disabled { color: #ccc !important; }
.flatpickr-months .flatpickr-prev-month, .flatpickr-months .flatpickr-next-month { fill: white !important; }
.flatpickr-months .flatpickr-prev-month:hover svg, .flatpickr-months .flatpickr-next-month:hover svg { fill: var(--accent) !important; }

/* --- Booking Form --- */
.book-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.book-full { grid-column: 1 / -1; }

.form-group {
  margin-bottom: 0.8rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.form-group label .required {
  color: var(--danger);
  margin-left: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid #e0e0e0;
  border-radius: var(--radius-sm);
  font-family: 'Poppins', sans-serif;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--card-bg);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

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

.submit-row {
  text-align: center;
  margin-top: 1rem;
}

.submit-btn {
  background: linear-gradient(135deg, var(--accent), #2c3e50);
  color: white;
  border: none;
  padding: 1rem 3rem;
  border-radius: 50px;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(52, 152, 219, 0.35);
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(52, 152, 219, 0.45);
}

.submit-btn i { margin-right: 0.5rem; }

footer {
  background: linear-gradient(135deg, var(--primary) 0%, #0d1b1e 100%);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  padding: 2rem 1.5rem;
  margin-top: auto;
  font-size: 0.9rem;
  border-top: 3px solid var(--accent);
}

footer strong { color: white; }

@media (max-width: 768px) {
  header { padding: 1.5rem 1rem; }
  .header-logo { max-height: 120px; }
  
  nav .nav-inner {
    flex-wrap: wrap;
    gap: 0;
  }
  
  nav a {
    padding: 0.8rem 1rem;
    font-size: 0.85rem;
    flex: 1;
    text-align: center;
  }
  
  .services-grid { grid-template-columns: 1fr; }
  .page-card { padding: 1.5rem; }
  .page-card h2 { font-size: 1.4rem; }
  .social-links { grid-template-columns: 1fr 1fr; }
  .cal-layout { grid-template-columns: 1fr; }
  .book-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .social-links { grid-template-columns: 1fr; }
  .rd-downloads { grid-template-columns: 1fr; }
  nav a { font-size: 0.78rem; padding: 0.7rem 0.5rem; }
  .header-logo { max-height: 100px; }
}