body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  padding-left: 0;
  transition: padding-left 0.4s ease-out;
}

.hamburger-menu {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1100;
  cursor: pointer;
  background-color: var(--hamburger-menu-bg);
  color: var(--hamburger-menu-text);
  padding: 12px 15px;
  border-radius: 10px;
  box-shadow: 0 4px 12px var(--shadow-color);
  transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.hamburger-menu:hover {
  background-color: var(--hamburger-menu-hover-bg);
  transform: scale(1.08);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.side-nav {
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100%;
  background-color: var(--side-nav-bg);
  color: var(--side-nav-text);
  z-index: 1050;
  box-shadow: 3px 0 15px var(--shadow-color);
  transition: left 0.4s ease-out;
  padding-top: 80px;
  overflow-y: auto;
}

.side-nav.open {
  left: 0;
}

.side-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.side-nav ul li {
  border-bottom: 1px solid var(--side-nav-border);
  position: relative;
}

.side-nav ul li:last-child {
  border-bottom: none;
}

.side-nav ul li a {
  display: block;
  padding: 18px 25px;
  color: var(--side-nav-text);
  text-decoration: none;
  font-size: 1.15rem;
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

.side-nav ul li a:hover,
.side-nav ul li a.active {
  background-color: var(--side-nav-hover-bg);
  color: var(--side-nav-hover-text);
  transform: translateX(5px);
}

.side-nav ul li.story-parent {
  padding: 0;
  cursor: pointer;
  border-bottom: 1px solid var(--side-nav-border);
  position: relative;
}

.story-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  color: var(--side-nav-text);
  font-size: 1.15rem;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.story-header:hover {
  background-color: var(--side-nav-hover-bg);
  color: var(--side-nav-hover-text);
}

.story-arrow {
  transition: transform 0.3s ease;
  font-size: 1rem;
}

.story-parent.active .story-arrow {
  transform: rotate(180deg);
}

.story-submenu {
  display: none;
  background-color: var(--side-nav-sub-item-bg);
  padding-left: 0;
  margin: 0;
  overflow: hidden;
}

.story-parent.active .story-submenu {
  display: block;
  animation: slideDownFadeIn 0.4s ease-out forwards;
}

@keyframes slideDownFadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
    max-height: 0;
  }
  to {
    opacity: 1;
    transform: translateY(0);
    max-height: 500px;
  }
}

.story-submenu li {
  border-bottom: 1px solid var(--side-nav-border);
}

.story-submenu li:last-child {
  border-bottom: none;
}

.story-submenu li a {
  padding: 15px 25px 15px 50px;
  font-size: 1.05rem;
  display: block;
  color: var(--side-nav-text);
  text-decoration: none;
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

.story-submenu li a:hover {
  background-color: var(--side-nav-hover-bg);
  color: var(--side-nav-hover-text);
  transform: translateX(3px);
}

.side-nav ul li.profile-controls-item {
  display: flex;
  flex-direction: column;
  padding: 20px 25px;
  border-bottom: 1px solid var(--side-nav-border);
  background-color: var(--secondary-bg);
  border-radius: 12px;
  margin: 15px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.side-nav ul li.profile-controls-item h3 {
  margin-top: 0;
  margin-bottom: 15px;
  color: var(--text-color);
  font-size: 1.25rem;
  font-weight: 700;
  text-align: center;
}

.side-nav ul li.profile-controls-item select,
.side-nav ul li.profile-controls-item input[type="text"] {
  width: 100%;
  padding: 14px;
  margin-bottom: 15px;
  border: 1px solid var(--input-border);
  border-radius: 10px;
  background-color: var(--input-bg);
  color: var(--input-text);
  font-size: 1.05rem;
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.08);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.side-nav ul li.profile-controls-item select:focus,
.side-nav ul li.profile-controls-item input[type="text"]:focus {
  border-color: var(--header-bg);
  box-shadow: 0 0 0 3px var(--header-bg-shadow);
  outline: none;
}

.side-nav ul li.profile-controls-item button.control-button {
  width: 100%;
  padding: 14px;
  margin-bottom: 12px;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  transition: background-color 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
}

.side-nav ul li.profile-controls-item button.control-button:hover {
  background-color: var(--button-bg-hover);
  transform: translateY(-3px);
  box-shadow: 0 5px 12px rgba(0, 0, 0, 0.2);
}

.side-nav ul li.profile-controls-item button.control-button:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.dark-mode-toggle-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 25px;
  border-top: 1px solid var(--side-nav-border);
  margin-top: auto;
  background-color: var(--secondary-bg);
  border-radius: 8px;
  margin: 10px 15px 20px 15px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.switch-label-darkmode {
  color: var(--text-color);
  font-size: 1.15rem;
  margin-right: 15px;
  font-weight: 600;
}

.switch-darkmode {
  position: relative;
  display: inline-block;
  width: 55px;
  height: 30px;
}

.switch-darkmode input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider-darkmode {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--switch-bg-off);
  transition: .4s;
  border-radius: 30px;
}

.slider-darkmode:before {
  position: absolute;
  content: "";
  height: 24px;
  width: 24px;
  left: 3px;
  bottom: 3px;
  background-color: var(--switch-slider-bg);
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider-darkmode {
  background-color: var(--switch-bg-on);
}

input:checked + .slider-darkmode:before {
  transform: translateX(25px);
}

.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--modal-overlay-bg);
  z-index: 1040;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0s, opacity 0.4s ease;
}

.menu-overlay.visible {
  visibility: visible;
  opacity: 1;
}

body.menu-open {
  padding-left: 280px;
}

@media (max-width: 768px) {
  .side-nav {
      width: 240px;
      left: -240px;
  }

  body.menu-open {
      padding-left: 240px;
  }

  .hamburger-menu {
      top: 15px;
      left: 15px;
      padding: 10px 12px;
      font-size: 1.4rem;
  }

  .side-nav ul li a {
      padding: 15px 20px;
      font-size: 1.1rem;
  }

  .story-header {
      padding: 15px 20px;
      font-size: 1.1rem;
  }

  .story-submenu li a {
      padding: 12px 20px 12px 40px;
      font-size: 1rem;
  }

  .side-nav ul li.profile-controls-item,
  .dark-mode-toggle-item {
    padding: 15px 20px;
    margin: 8px 10px;
  }

  .side-nav ul li.profile-controls-item h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
  }

  .switch-label-darkmode {
    font-size: 1.1rem;
  }
}