/* main.css - Core layout and positioning styles */

/* ===== BASE STYLES ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  cursor: default;
}

/* Re-enable cursor for interactive elements */
a, button, 
input[type="submit"], 
input[type="button"], 
input[type="reset"],
.filter-btn,
[role="button"] {
  cursor: pointer !important;
}

html, body {
  height: 100%;
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== LAYOUT STRUCTURE ===== */
.app-container {
  display: flex;
  height: 100vh;
  width: 100%;
  position: relative;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  padding: var(--space-10) var(--space-5) var(--space-5);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-fixed);
  transition: transform var(--transition-normal);
}

.sidebar::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  opacity: 0.8;
}

/* Logo and Name */
.logo-name {
  text-align: center;
  margin-bottom: var(--space-10);
}

.logo-link {
  position: relative;
  display: block;
  transition: all var(--transition-normal);
  border-radius: 50%;
  overflow: hidden;
}

.logo-name img {
  max-width: 150px;
  border-radius: 50%;
  margin-bottom: var(--space-6);
  border-width: 3px;
  border-style: solid;
  transition: all var(--transition-normal);
}

.home-icon {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.5em;
  opacity: 0;
  z-index: 2;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  pointer-events: none;
}

.logo-link:hover img {
  filter: brightness(0.2);
  transform: scale(1.02);
}

.logo-link:hover .home-icon {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.1);
}

.logo-name h1 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin: 0;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

/* ===== NAVIGATION ===== */
.main-nav ul {
  list-style: none;
  width: 100%;
}

.main-nav ul li {
  margin: var(--space-4) 0;
}

.main-nav ul li a.nav-link {
  position: relative;
  display: block;
  width: 100%;
  padding: var(--space-4) var(--space-5);
  box-sizing: border-box;
  text-align: left;
  font-size: var(--font-size-md);
  text-decoration: none;
  transition: all var(--transition-normal);
  border-radius: var(--border-radius-md);
  border-left: 3px solid transparent;
  overflow: hidden;
}

.main-nav ul li a.nav-link:hover {
  transform: translateX(10px);
}

.main-nav ul li a.nav-link span {
  position: relative;
  z-index: 1;
}

.main-nav ul li a.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  transition: background var(--transition-normal);
}

/* Mobile menu toggle */
#mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.5em;
  width: 40px;
  height: 40px;
  z-index: var(--z-fixed);
}

/* ===== THEME TOGGLE BUTTONS ===== */
.theme-toggle {
  background: transparent;
  border: none;
  font-size: 1.5em;
  padding: var(--space-3);
  transition: all var(--transition-normal);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  position: relative;
  z-index: var(--z-fixed);
  color: var(--color-text-primary);
}

.theme-toggle:hover {
  transform: rotate(20deg);
  color: var(--color-accent-primary);
  background: var(--color-bg-hover);
}

#theme-toggle {
  margin-top: auto;
  align-self: flex-start;
  margin-left: 0;
}

#mobile-theme-toggle {
  display: none;
  margin-top: var(--space-10);
  align-self: flex-start;
  margin-left: 0;
}

/* ===== CONTENT AREA ===== */
.content-container {
  flex-grow: 1;
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  overflow-y: auto;
  padding: var(--space-8) var(--space-10);
  position: relative;
}

/* Page Content */
.page-content {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-very-slow), transform var(--transition-very-slow);
}

.page-content.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* ===== TYPOGRAPHY ===== */
h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-8);
  position: relative;
  display: inline-block;
  font-weight: var(--font-weight-bold);
}

h2::after {
  content: "";
  position: absolute;
  bottom: calc(-1 * var(--space-3));
  left: 0;
  width: 60px;
  height: 4px;
  border-radius: 2px;
}

h3 {
  font-size: var(--font-size-xl);
  margin: var(--space-4) 0;
  font-weight: var(--font-weight-medium);
}

h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
  font-weight: var(--font-weight-semibold);
  padding-bottom: var(--space-3);
}

p {
  margin-bottom: var(--space-4);
  line-height: var(--line-height-relaxed);
}

/* ===== TRANSITION EFFECTS ===== */
/* Theme Transition (Slide left to right) */
#transition-overlay {
  position: fixed;
  left: 0;
  top: 0;
  height: 100%;
  pointer-events: none;
  z-index: var(--z-overlay);
  width: 0;
  transition: all 0.4s cubic-bezier(0.77, 0, 0.175, 1);
}

/* Page Content Transition (Fade in/out) - Only affects content area */
.content-transition {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg-primary);
  opacity: 0;
  pointer-events: none;
  z-index: var(--z-overlay);
  transition: opacity 0.3s ease;
}

/* Mobile Menu Overlay */
.mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-fixed) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
  backdrop-filter: blur(3px);
}

.mobile-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ===== SCROLLBAR STYLING ===== */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  border-radius: var(--border-radius-md);
}

::-webkit-scrollbar-thumb {
  border-radius: var(--border-radius-md);
}