html {
  scroll-behavior: smooth;
}

:root {
  /* Existing Variable */
  --header-height: 80px;
  /* Light Mode Colors */
  --primary: #3b82f6;
  --secondary: #7c3aed;
  --bg-body: #f9fafb;
  --bg-card: #ffffff;
  --bg-navbar: #00112a;
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-inverted: #ffffff;
  --border: #d1d5db;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --hover: rgba(59, 130, 246, 0.1);
  --shadow: rgba(0, 0, 0, 0.1);
  --gradient-start: #3b82f6;
  --gradient-end: #7c3aed;
  --gray-light: #f0f0f0;
  --gray-medium: #6b7280;
  --gray-dark: #555;
}

body.dark {
  /* Dark Mode Colors */
  --primary: #60a5fa;
  --secondary: #a78bfa;
  --bg-body: #111827;
  --bg-card: #1f2937;
  --bg-navbar: #0f172a;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-inverted: #1f2937;
  --border: #4b5563;
  --success: #34d399;
  --error: #f87171;
  --warning: #fbbf24;
  --hover: rgba(96, 165, 250, 0.1);
  --shadow: rgba(0, 0, 0, 0.3);
  --gradient-start: #60a5fa;
  --gradient-end: #a78bfa;
  --gray-light: #4b5563;
  --gray-medium: #9ca3af;
  --gray-dark: #9ca3af;
}

[id] {
  scroll-margin-top: calc(var(--header-height) + 2rem);
}

body {
  padding-top: 70px;
  background-color: var(--bg-body);
  color: var(--text-primary);
}

.timeline-card {
  transition: transform 0.5s ease-in-out, opacity 0.5s ease-in-out;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
}

.timeline-card-hidden {
  transform: translateY(50px);
  opacity: 0;
}

.timeline-card-visible {
  transform: translateY(0);
  opacity: 1;
}

.timeline-line {
  height: calc(100% - 40px);
}

.about-image {
  max-width: 60%;
  height: 60%;
  border-radius: 2rem;
}

.lightbox {
  display: none;
  position: fixed;
  top: env(safe-area-inset-top);
  bottom: env(safe-area-inset-bottom);
  left: env(safe-area-inset-left);
  right: env(safe-area-inset-right);
  background-color: rgba(0, 0, 0, 0.7); /* Consistent for both modes */
  z-index: 1000;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  transform: scale(0.8);
  transition: transform 0.3s ease-in-out;
  max-height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 20px);
  overflow-y: auto;
  background-color: var(--bg-card);
}

.lightbox.active .lightbox-content {
  transform: scale(1);
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-inverted);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn-primary:hover, .btn-primary:active {
  background-color: var(--secondary);
  transform: translateY(-2px);
}

.hero-bg {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px var(--shadow);
}

.google-signin-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.google-signin-btn:hover, .google-signin-btn:active {
  background-color: var(--hover);
  transform: translateY(-2px);
}

.google-signin-btn img {
  width: 24px;
  height: 24px;
  margin-right: 0.5rem;
}

.navbar {
  background: var(--bg-navbar);
  padding: 10px 20px;
  color: var(--text-inverted);
  box-shadow: 0 2px 4px var(--shadow);
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
}

.modal {
  display: none;
  position: fixed;
  top: 5rem;
  right: 2rem;
  width: 300px;
  background: var(--bg-card);
  padding: 20px;
  border-radius: 15px;
  color: var(--text-primary);
  box-shadow: 0 5px 15px var(--shadow);
  z-index: 1000;
  overflow-y: auto;
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 0;
  transform: translateY(-10px);
}

.modal.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.modal .close {
  position: absolute;
  top: 15px;
  right: 15px;
  cursor: pointer;
  font-size: 24px;
  color: var(--gray-medium);
  transition: color 0.3s ease;
}

.modal .close:hover {
  color: var(--error);
}

.modal button {
  background: var(--gray-light);
  border: 1px solid var(--border);
  padding: 8px 16px;
  color: var(--text-primary);
  border-radius: 25px;
  cursor: pointer;
  margin: 10px 5px;
  font-weight: 500;
  transition: background 0.3s ease, transform 0.2s ease;
}

.modal button:hover {
  background: var(--hover);
  transform: translateY(-2px);
}

.modal .footer {
  font-size: 12px;
  color: var(--gray-medium);
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
  .modal {
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    border-radius: 0;
    padding: 20px;
  }
}

.account-card {
  width: 280px;
  background: var(--bg-card);
  border-radius: 12px;
  box-shadow: 0 4px 20px var(--shadow);
  padding: 16px;
  font-family: Arial, sans-serif;
}

.account-card-header {
  display: flex;
  margin-bottom: 2rem;
  flex-direction: column;
  align-items: center;
}

.account-avatar {
  border-radius: 50%;
  width: 50px;
  height: 50px;
  margin-bottom: 12px;
}

.account-email {
  margin: 0.5rem;
  font-size: 14px;
  color: var(--gray-dark);
}

.account-greeting {
  margin: 4px 0 0;
  font-size: 18px;
  font-weight: normal;
}

.account-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.account-btn {
  padding: 10px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.3s ease;
}

.account-btn.primary {
  background: var(--primary);
  color: var(--text-inverted);
}

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

.account-btn.secondary {
  background: var(--gray-light);
  color: var(--text-primary);
}

.account-btn.secondary:hover {
  background: var(--hover);
}

.account-footer {
  font-size: 12px;
  color: var(--gray-medium);
  text-align: center;
}

.account-footer a {
  color: var(--gray-dark);
  text-decoration: none;
}

.account-footer a:hover {
  text-decoration: underline;
}

.ui-datepicker {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 8px var(--shadow);
  padding: 10px;
  font-family: Arial, sans-serif;
  width: 300px;
}

.ui-datepicker-header {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: var(--text-inverted);
  border-radius: 6px 6px 0 0;
  padding: 10px;
  text-align: center;
  font-weight: bold;
}

.ui-datepicker-calendar th {
  background: var(--gray-light);
  padding: 8px;
  color: var(--text-primary);
}

.ui-datepicker-calendar td {
  padding: 6px;
  text-align: center;
}

.ui-datepicker-calendar a {
  text-decoration: none;
  color: var(--text-primary);
  padding: 5px;
  display: block;
  border-radius: 4px;
  transition: background 0.3s;
}

.ui-datepicker-calendar a:hover {
  background: var(--primary);
  color: var(--text-inverted);
}

.ui-datepicker-prev, .ui-datepicker-next {
  cursor: pointer;
  color: var(--text-inverted);
}

.ui-datepicker-prev:hover, .ui-datepicker-next:hover {
  background: rgba(255, 255, 255, 0.2);
}

#calendar-modal .lightbox-content {
  max-width: fit-content;
}

.time-select {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-top: 10px;
  background: var(--bg-card);
  color: var(--text-primary);
}

.glowing-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--bg-card);
  animation: glowing 1s ease-in-out infinite alternate;
}

@keyframes glowing {
  from {
    box-shadow: 0 0 5px var(--primary), 0 0 10px var(--bg-card), 0 0 15px var(--gray-light), 0 0 20px var(--bg-card), 0 0 25px var(--primary), 0 0 30px var(--secondary), 0 0 35px var(--secondary);
  }
  to {
    box-shadow: 0 0 10px var(--secondary), 0 0 12px var(--primary), 0 0 15px var(--warning), 0 0 25px var(--primary), 0 0 30px var(--primary), 0 0 35px var(--gray-light), 0 0 40px var(--secondary);
  }
}

#mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  height: calc(100vh - 70px);
  transform: translateX(-100%);
  transition: transform 0.3s ease-in-out;
  background-color: var(--bg-navbar);
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  overflow-y: auto;
}

#mobile-menu.open {
  transform: translateX(0);
}

#mobile-menu ul li {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#mobile-menu.open ul li {
  opacity: 1;
  transform: translateY(0);
}

#mobile-menu.open ul li:nth-child(1) { transition-delay: 0.1s; }
#mobile-menu.open ul li:nth-child(2) { transition-delay: 0.15s; }
#mobile-menu.open ul li:nth-child(3) { transition-delay: 0.2s; }
#mobile-menu.open ul li:nth-child(4) { transition-delay: 0.25s; }
#mobile-menu.open ul li:nth-child(5) { transition-delay: 0.3s; }
#mobile-menu.open ul li:nth-child(6) { transition-delay: 0.35s; }

@media (min-width: 768px) {
  #mobile-menu {
    display: none;
  }
}

.blur {
  --tw-blur: blur(5px);
  filter: var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow);
}

/* Error and Success Messages */
#error-message {
  color: var(--error);
}

#success-message {
  color: var(--success);
}html {
  scroll-behavior: smooth;
}

:root {
  /* Existing Variable */
  --header-height: 80px;
  /* Light Mode Colors */
  --primary: #3b82f6;
  --secondary: #7c3aed;
  --bg-body: #f9fafb;
  --bg-card: #ffffff;
  --bg-navbar: #00112a;
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-inverted: #ffffff;
  --border: #d1d5db;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --hover: rgba(59, 130, 246, 0.1);
  --shadow: rgba(0, 0, 0, 0.1);
  --gradient-start: #3b82f6;
  --gradient-end: #7c3aed;
  --gray-light: #f0f0f0;
  --gray-medium: #6b7280;
  --gray-dark: #555;
}

body.dark {
  /* Dark Mode Colors */
  --primary: #60a5fa;
  --secondary: #a78bfa;
  --bg-body: #111827;
  --bg-card: #1f2937;
  --bg-navbar: #0f172a;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-inverted: #1f2937;
  --border: #4b5563;
  --success: #34d399;
  --error: #f87171;
  --warning: #fbbf24;
  --hover: rgba(96, 165, 250, 0.1);
  --shadow: rgba(0, 0, 0, 0.3);
  --gradient-start: #60a5fa;
  --gradient-end: #a78bfa;
  --gray-light: #4b5563;
  --gray-medium: #9ca3af;
  --gray-dark: #9ca3af;
}

[id] {
  scroll-margin-top: calc(var(--header-height) + 2rem);
}

body {
  padding-top: 70px;
  background-color: var(--bg-body);
  color: var(--text-primary);
}

.timeline-card {
  transition: transform 0.5s ease-in-out, opacity 0.5s ease-in-out;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
}

.timeline-card-hidden {
  transform: translateY(50px);
  opacity: 0;
}

.timeline-card-visible {
  transform: translateY(0);
  opacity: 1;
}

.timeline-line {
  height: calc(100% - 40px);
}

.about-image {
  max-width: 60%;
  height: 60%;
  border-radius: 2rem;
}

.lightbox {
  display: none;
  position: fixed;
  top: env(safe-area-inset-top);
  bottom: env(safe-area-inset-bottom);
  left: env(safe-area-inset-left);
  right: env(safe-area-inset-right);
  background-color: rgba(0, 0, 0, 0.7); /* Consistent for both modes */
  z-index: 1000;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  transform: scale(0.8);
  transition: transform 0.3s ease-in-out;
  max-height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 20px);
  overflow-y: auto;
  background-color: var(--bg-card);
}

.lightbox.active .lightbox-content {
  transform: scale(1);
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-inverted);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn-primary:hover, .btn-primary:active {
  background-color: var(--secondary);
  transform: translateY(-2px);
}

.hero-bg {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.service-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px var(--shadow);
}

.google-signin-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.google-signin-btn:hover, .google-signin-btn:active {
  background-color: var(--hover);
  transform: translateY(-2px);
}

.google-signin-btn img {
  width: 24px;
  height: 24px;
  margin-right: 0.5rem;
}

.navbar {
  background: var(--bg-navbar);
  padding: 10px 20px;
  color: var(--text-inverted);
  box-shadow: 0 2px 4px var(--shadow);
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
}

.modal {
  display: none;
  position: fixed;
  top: 5rem;
  right: 2rem;
  width: 300px;
  background: var(--bg-card);
  padding: 20px;
  border-radius: 15px;
  color: var(--text-primary);
  box-shadow: 0 5px 15px var(--shadow);
  z-index: 1000;
  overflow-y: auto;
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 0;
  transform: translateY(-10px);
}

.modal.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.modal .close {
  position: absolute;
  top: 15px;
  right: 15px;
  cursor: pointer;
  font-size: 24px;
  color: var(--gray-medium);
  transition: color 0.3s ease;
}

.modal .close:hover {
  color: var(--error);
}

.modal button {
  background: var(--gray-light);
  border: 1px solid var(--border);
  padding: 8px 16px;
  color: var(--text-primary);
  border-radius: 25px;
  cursor: pointer;
  margin: 10px 5px;
  font-weight: 500;
  transition: background 0.3s ease, transform 0.2s ease;
}

.modal button:hover {
  background: var(--hover);
  transform: translateY(-2px);
}

.modal .footer {
  font-size: 12px;
  color: var(--gray-medium);
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
  .modal {
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    border-radius: 0;
    padding: 20px;
  }
}

.account-card {
  width: 280px;
  background: var(--bg-card);
  border-radius: 12px;
  box-shadow: 0 4px 20px var(--shadow);
  padding: 16px;
  font-family: Arial, sans-serif;
}

.account-card-header {
  display: flex;
  margin-bottom: 2rem;
  flex-direction: column;
  align-items: center;
}

.account-avatar {
  border-radius: 50%;
  width: 50px;
  height: 50px;
  margin-bottom: 12px;
}

.account-email {
  margin: 0.5rem;
  font-size: 14px;
  color: var(--gray-dark);
}

.account-greeting {
  margin: 4px 0 0;
  font-size: 18px;
  font-weight: normal;
}

.account-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.account-btn {
  padding: 10px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.3s ease;
}

.account-btn.primary {
  background: var(--primary);
  color: var(--text-inverted);
}

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

.account-btn.secondary {
  background: var(--gray-light);
  color: var(--text-primary);
}

.account-btn.secondary:hover {
  background: var(--hover);
}

.account-footer {
  font-size: 12px;
  color: var(--gray-medium);
  text-align: center;
}

.account-footer a {
  color: var(--gray-dark);
  text-decoration: none;
}

.account-footer a:hover {
  text-decoration: underline;
}

.ui-datepicker {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 8px var(--shadow);
  padding: 10px;
  font-family: Arial, sans-serif;
  width: 300px;
}

.ui-datepicker-header {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: var(--text-inverted);
  border-radius: 6px 6px 0 0;
  padding: 10px;
  text-align: center;
  font-weight: bold;
}

.ui-datepicker-calendar th {
  background: var(--gray-light);
  padding: 8px;
  color: var(--text-primary);
}

.ui-datepicker-calendar td {
  padding: 6px;
  text-align: center;
}

.ui-datepicker-calendar a {
  text-decoration: none;
  color: var(--text-primary);
  padding: 5px;
  display: block;
  border-radius: 4px;
  transition: background 0.3s;
}

.ui-datepicker-calendar a:hover {
  background: var(--primary);
  color: var(--text-inverted);
}

.ui-datepicker-prev, .ui-datepicker-next {
  cursor: pointer;
  color: var(--text-inverted);
}

.ui-datepicker-prev:hover, .ui-datepicker-next:hover {
  background: rgba(255, 255, 255, 0.2);
}

#calendar-modal .lightbox-content {
  max-width: fit-content;
}

.time-select {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-top: 10px;
  background: var(--bg-card);
  color: var(--text-primary);
}

.glowing-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--bg-card);
  animation: glowing 1s ease-in-out infinite alternate;
}

@keyframes glowing {
  from {
    box-shadow: 0 0 5px var(--primary), 0 0 10px var(--bg-card), 0 0 15px var(--gray-light), 0 0 20px var(--bg-card), 0 0 25px var(--primary), 0 0 30px var(--secondary), 0 0 35px var(--secondary);
  }
  to {
    box-shadow: 0 0 10px var(--secondary), 0 0 12px var(--primary), 0 0 15px var(--warning), 0 0 25px var(--primary), 0 0 30px var(--primary), 0 0 35px var(--gray-light), 0 0 40px var(--secondary);
  }
}

#mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  height: calc(100vh - 70px);
  transform: translateX(-100%);
  transition: transform 0.3s ease-in-out;
  background-color: var(--bg-navbar);
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  overflow-y: auto;
}

#mobile-menu.open {
  transform: translateX(0);
}

#mobile-menu ul li {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#mobile-menu.open ul li {
  opacity: 1;
  transform: translateY(0);
}

#mobile-menu.open ul li:nth-child(1) { transition-delay: 0.1s; }
#mobile-menu.open ul li:nth-child(2) { transition-delay: 0.15s; }
#mobile-menu.open ul li:nth-child(3) { transition-delay: 0.2s; }
#mobile-menu.open ul li:nth-child(4) { transition-delay: 0.25s; }
#mobile-menu.open ul li:nth-child(5) { transition-delay: 0.3s; }
#mobile-menu.open ul li:nth-child(6) { transition-delay: 0.35s; }

@media (min-width: 768px) {
  #mobile-menu {
    display: none;
  }
}

.blur { --tw-blur: blur(5px);
  filter: var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow);
}

/* Error and Success Messages */
#error-message {
  color: var(--error);
}

#success-message {
  color: var(--success);
}