@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
  --rust: #AC4B39;
  --rust-light: #D66D57;
  --rust-dark: #813526;
  --creme: #FDFBF7;
  --creme-dark: #F5EFEB;
  --text-dark: #2A2423;
  --text-light: #7A7270;
  --shadow-sm: 0 4px 6px -1px rgba(172, 75, 57, 0.08);
  --shadow-md: 0 10px 15px -3px rgba(172, 75, 57, 0.12);
  --shadow-lg: 0 20px 25px -5px rgba(172, 75, 57, 0.15);
  --glass-bg: rgba(253, 251, 247, 0.85);
  --glass-border: rgba(172, 75, 57, 0.15);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--creme);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Utilities */
.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.text-center { text-align: center; }
.text-rust { color: var(--rust); }

/* Animation */
.slide-up {
  animation: slideUp 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.pop-in {
  animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes slideUp {
  0% { transform: translateY(30px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

@keyframes popIn {
  0% { transform: scale(0.9); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* Login Page */
.login-bg {
  background: radial-gradient(circle at top right, var(--creme-dark) 0%, var(--creme) 100%);
  position: relative;
  overflow: hidden;
}

.login-bg::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(172, 75, 57, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}

.glassmorphism {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 3rem 2.5rem;
  position: relative;
  z-index: 1;
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-icon {
  font-size: 3rem;
  color: var(--rust);
  margin-bottom: 1rem;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-light);
  font-size: 1rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.input-with-icon {
  position: relative;
}

.input-with-icon i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  transition: var(--transition);
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 1rem 1rem 1rem 3rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: white;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-dark);
  transition: var(--transition);
}

input:focus {
  outline: none;
  border-color: var(--rust);
  box-shadow: 0 0 0 4px rgba(172, 75, 57, 0.1);
}

input:focus + i, .input-with-icon input:focus ~ i {
  color: var(--rust);
}

.error-msg {
  background: #FFEBE8;
  color: #D32F2F;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-left: 4px solid #D32F2F;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--rust);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--rust-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active {
  transform: translateY(0);
}

/* Dashboard Layout */
.app-container {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 300px;
  background: white;
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  z-index: 10;
}

.brand {
  padding: 2rem;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: var(--rust);
  color: white;
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.2rem;
}

.brand h1 {
  font-size: 1.2rem;
  margin: 0;
}

.nav-section {
  padding: 1.5rem;
  flex: 1;
  overflow-y: auto;
}

.nav-section h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-light);
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-dark);
  font-weight: 500;
  transition: var(--transition);
  margin-bottom: 0.5rem;
  gap: 0.8rem;
}

.nav-item:hover, .nav-item.active {
  background: var(--creme-dark);
  color: var(--rust);
}

.nav-item.active {
  background: rgba(172, 75, 57, 0.1);
  font-weight: 600;
}

.add-btn {
  background: none;
  border: none;
  color: var(--rust);
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
  padding: 0.2rem;
}
.add-btn:hover {
  color: var(--rust-dark);
  transform: scale(1.1);
}

.user-profile {
  padding: 1.5rem;
  border-top: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.avatar {
  width: 36px;
  height: 36px;
  background: var(--creme-dark);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--rust);
  font-weight: 600;
}

.logout-btn {
  color: var(--text-light);
  transition: var(--transition);
}
.logout-btn:hover { color: var(--rust); }

.main-content {
  flex: 1;
  background: var(--creme);
  overflow-y: auto;
  padding: 2rem 3rem;
}

.page-header {
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.breadcrumb {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.breadcrumb-item {
  cursor: pointer;
  transition: var(--transition);
}
.breadcrumb-item:hover { color: var(--rust); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: white;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--rust-light);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(172, 75, 57, 0.1);
  color: var(--rust);
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card-title {
  font-weight: 600;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.card-meta {
  color: var(--text-light);
  font-size: 0.85rem;
  margin-top: auto;
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  background: white;
  border-radius: var(--radius-md);
  border: 1px dashed var(--glass-border);
}
.empty-icon {
  font-size: 4rem;
  color: var(--creme-dark);
  margin-bottom: 1rem;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

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

.modal-card {
  background: white;
  width: 100%;
  max-width: 450px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: var(--transition);
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--text-light);
  cursor: pointer;
}
.close-btn:hover { color: var(--rust); }

.modal-body {
  padding: 2rem;
}

.modal-footer {
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--glass-border);
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  background: var(--creme-dark);
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

.btn-secondary {
  background: white;
  color: var(--text-dark);
  border: 1px solid var(--glass-border);
}
.btn-secondary:hover {
  background: var(--creme);
}

/* Presentation Tool */
.present-container {
  width: 100vw;
  height: 100vh;
  background: #111;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.canvas-wrapper {
  flex: 1;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

#pdf-canvas {
  position: absolute;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
  z-index: 1;
}

#draw-canvas {
  position: absolute;
  z-index: 2;
  cursor: crosshair;
}

.toolbar {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(20px);
  padding: 0.8rem;
  border-radius: var(--radius-lg);
  display: flex;
  gap: 0.5rem;
  z-index: 10;
  border: 1px solid rgba(255,255,255,0.2);
  transition: opacity 0.3s;
}

.present-container.idle .toolbar {
  opacity: 0;
}

.tool-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.1);
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.2s;
}

.tool-btn:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}

.tool-btn.active {
  background: var(--rust);
  border-color: var(--rust-light);
  box-shadow: 0 0 15px rgba(172, 75, 57, 0.6);
}

.tool-separator {
  width: 1px;
  background: rgba(255,255,255,0.2);
  margin: 0 0.5rem;
}

.page-controls {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  padding: 0.5rem 1rem;
  border-radius: 30px;
  color: white;
  z-index: 10;
}

.page-controls button {
  background: none;
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  transition: color 0.2s;
}
.page-controls button:hover { color: var(--rust-light); }
.page-controls button:disabled { color: rgba(255,255,255,0.3); cursor: not-allowed; }

.exit-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 40px; height: 40px;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(5px);
  color: white;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex; justify-content: center; align-items: center;
  cursor: pointer;
  z-index: 10;
  transition: all 0.2s;
}
.exit-btn:hover { background: rgba(172,75,57,0.8); }

.chapter-badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: rgba(172, 75, 57, 0.1);
  color: var(--rust);
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: white;
  border-left: 4px solid var(--rust);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  font-weight: 500;
  transform: translateX(120%);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.show {
  transform: translateX(0);
}