:root {
  --navy-dark: #050b14;
  --navy-main: #0a192f;
  --navy-light: #112240;
  --navy-lighter: #233554;
  --pink-main: #df3b57;
  /* Logo Pink-Red */
  --pink-light: #f0526c;
  /* Logo Lighter Pink-Red */
  --pink-glow: rgba(223, 59, 87, 0.3);
  --text-primary: #ccd6f6;
  --text-secondary: #8892b0;
  --white: #ffffff;

  --transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
  --border-radius: 12px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--navy-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4 {
  color: var(--white);
  font-weight: 700;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  background: linear-gradient(to right, var(--white), var(--pink-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 1.8rem;
  color: var(--pink-light);
}

a {
  color: var(--pink-main);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--pink-light);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  background: transparent;
  color: var(--pink-main);
  border: 2px solid var(--pink-main);
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  gap: 0.5rem;
}

.btn:hover {
  background-color: var(--pink-glow);
  box-shadow: 0 0 15px var(--pink-glow);
}

.btn-primary {
  background-color: var(--pink-main);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--pink-light);
  border-color: var(--pink-light);
  transform: translateY(-2px);
}

/* Layout */
#app-container {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  align-items: flex-start;
  min-height: 100vh;
}

.sidebar {
  width: 250px;
  flex-shrink: 0;
  background-color: var(--navy-main);
  padding: 0 1rem 2rem 1rem;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--navy-lighter);
  z-index: 1000;
  transition: var(--transition);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar.collapsed {
  width: 80px;
  padding: 0 0.5rem 2rem 0.5rem;
}

.sidebar .logo {
  background-color: white;
  margin: 0 -1rem 2rem -1rem;
  padding: 2rem 1rem;
  border-bottom: 1px solid var(--navy-lighter);
}

.logo {
  margin-bottom: 2rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo img {
  max-width: 100%;
  max-height: 40px;
  object-fit: contain;
  transition: var(--transition);
}

.sidebar.collapsed .logo img {
  display: none;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
  background-color: var(--navy-light);
  color: var(--pink-main);
}

.nav-link i {
  font-size: 1.2rem;
}

.sidebar.collapsed .nav-link {
  justify-content: center;
  padding: 0.75rem 0;
}

.sidebar.collapsed .nav-link span,
.sidebar.collapsed .nav-link p,
.sidebar.collapsed .nav-link text {
  display: none;
}

.sidebar.collapsed .nav-link i {
  font-size: 1.5rem;
  margin: 0;
}

.main-content {
  flex: 1;
  padding: 1rem 2rem;
  min-height: 100vh;
  min-width: 0;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  background-color: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(10px);
  padding: 0.8rem 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--navy-lighter);
  position: sticky;
  top: 0;
  z-index: 50;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--pink-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
}

/* Cards */
.card {
  background-color: var(--navy-light);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
  transition: var(--transition);
  border: 1px solid transparent;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--navy-lighter);
}

/* Views Setup */
.view {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.view.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

/* Subtabs */
.subtabs-container {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--navy-lighter);
}

.subtab-btn {
  background-color: var(--navy-dark);
  color: var(--text-secondary);
  border: 1px solid var(--navy-lighter);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  font-weight: 500;
}

.subtab-btn:hover {
  background-color: var(--navy-lighter);
  color: white;
}

.subtab-btn.active {
  background-color: var(--pink-main);
  border-color: var(--pink-main);
  color: white;
}

/* Dashboard Specifics */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--pink-light);
  margin-bottom: 0.5rem;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.course-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
  border: 1px solid var(--navy-lighter);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--navy-lighter);
  border-radius: 4px;
  margin-top: 1rem;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--pink-main);
  border-radius: 4px;
}

/* Flashcards */
.flashcard-container {
  perspective: 1000px;
  width: 100%;
  max-width: 500px;
  height: 300px;
  margin: 2rem auto;
}

.flashcard {
  width: 100%;
  height: 100%;
  position: relative;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  cursor: pointer;
}

.flashcard.flipped {
  transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
  width: 100%;
  height: 100%;
  position: absolute;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--navy-light);
  border-radius: var(--border-radius);
  border: 2px solid var(--pink-main);
  padding: 2rem;
  text-align: center;
}

.flashcard-back {
  transform: rotateY(180deg);
  background-color: var(--pink-main);
  color: white;
}

.flashcard-navigation {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
}

@media(max-width:768px){
  .flashcard-container {
    width: 100%;
    max-width: 320px;
    margin: auto;
  }
  .flashcard-navigation {
    display: flex;
    justify-content: center;
    gap: 12px;
    width: 100%;
    margin-top: 20px;
  }
  .flashcard-navigation button {
    width: auto;
    min-width: 100px;
  }
}

/* Dictionary */
.search-box {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.search-input {
  flex: 1;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--navy-lighter);
  background-color: var(--navy-dark);
  color: white;
  font-size: 1rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--pink-main);
}

.dict-result {
  background-color: var(--navy-light);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-top: 1rem;
}

.phonetic {
  color: var(--pink-light);
  font-style: italic;
  margin-bottom: 1rem;
  display: inline-block;
}

/* Auth View */
.auth-container {
  display: flex;
  min-height: 100dvh;
  height: 100dvh;
  width: 100vw;
  background-color: var(--navy-dark);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
}

.login-banner-container {
  flex: 1;
  display: flex;
  background-color: #070d42;
}

.login-banner {
  width: 100%;
  height: 100vh;
  object-fit: cover;
  object-position: center;
}

.auth-form-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background-color: var(--navy-light);
}

/* Garante que o iframe do Netlify Identity fique por cima do auth-container (que tem z-index: 100) */
#netlify-identity-widget {
  z-index: 999999 !important;
}

/* Garante que qualquer modal do nosso sistema fique SEMPRE por cima do widget do Netlify */
.modal-overlay {
  z-index: 2147483647 !important;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  padding: 3rem 2rem;
  text-align: center;
  background-color: #FFFFFF;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  border: none;
}

.auth-card h2, .auth-card p {
  color: var(--navy-dark);
}

.auth-card .logo {
  margin-bottom: 2rem;
}

.auth-card .logo img {
  max-height: 60px;
}

.form-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--navy-lighter);
  background-color: var(--navy-dark);
  color: white;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--pink-main);
}

.auth-btn {
  width: 100%;
  margin-top: 1rem;
}

/* Responsive */
.nav-toggle {
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  display: block;
}

.backdrop {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.backdrop.show {
  display: block;
  opacity: 1;
}

@media (max-width: 768px) {
  .auth-container {
    flex-direction: column;
  }

  .login-banner-container {
    flex: none;
    width: 100%;
    /* 40dvh to ensure form fits and looks like a native app without overlapping */
    height: 40dvh; 
  }

  .login-banner {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
  }

  .auth-form-container {
    width: 100%;
    padding: 2rem 1rem;
    min-height: 60dvh;
  }

  .sidebar {
    position: fixed;
    transform: translateX(-100%);
    width: 250px !important;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar.collapsed {
    width: 250px; /* ignore collapse on mobile */
  }

  .sidebar.collapsed .nav-link span {
    display: inline;
  }

  .main-content {
    margin-left: 0;
    padding: 1rem;
  }

  .header {
    padding: 0.8rem;
    gap: 0.5rem;
  }

  .header > div:first-child {
    min-width: 0;
    flex: 1;
    gap: 0.5rem !important;
  }

  .header #page-title {
    font-size: 1.1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .header .user-profile {
    gap: 0.5rem;
  }

  .header #user-greeting {
    display: none;
  }

  .header .avatar {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  }
}

/* Embed Containers */
.embed-container {
  position: relative;
  width: 100%;
  height: 70vh;
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--navy-lighter);
  background: var(--navy-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.embed-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.embed-placeholder {
  text-align: center;
  padding: 2rem;
}

/* Chat Assistant */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 600px;
  background-color: var(--navy-light);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--navy-lighter);
}

.chat-messages {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message {
  max-width: 80%;
  padding: 1rem;
  border-radius: 12px;
}

.message.bot {
  background-color: var(--navy-lighter);
  align-self: flex-start;
  border-bottom-left-radius: 2px;
}

.message.user {
  background-color: var(--pink-main);
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: 2px;
}

.chat-input-area {
  display: flex;
  padding: 1rem;
  background-color: var(--navy-main);
  border-top: 1px solid var(--navy-lighter);
  gap: 0.5rem;
}

.chat-input-area input {
  flex: 1;
  padding: 0.75rem;
  border-radius: 20px;
  border: 1px solid var(--navy-lighter);
  background-color: var(--navy-dark);
  color: white;
}

.chat-input-area input:focus {
  outline: none;
  border-color: var(--pink-main);
}

.chat-input-area button {
  border-radius: 50%;
  width: 45px;
  height: 45px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* Responsive Video Container */
.video-responsive-container {
  width: 100%;
  max-width: 100%;
  padding-bottom: 56.25%; height: 0;
  overflow: visible;
}

.video-responsive-container video,
.video-responsive-container iframe {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@media (max-width: 768px) {
  .video-responsive-container {
    width: 100%;
    height: auto;
  }

  .video-responsive-container video,
  .video-responsive-container iframe {
    max-width: 100%;
    height: auto;
  }
}

/* Mobile fixes for iframes and embeds cleaned up */

.google-embed-container {
    width: 100%;
    height: 80vh;
    overflow: hidden;
}

.google-embed-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

@media(max-width:768px){
  .google-embed-container {
      width: 100%;
      height: 85vh;
  }

  .google-embed-container iframe {
      width: 100%;
      min-width: 100%;
  }
}


#sidebar { display: none; }

/* Responsive Video Container */
.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; height: 0;
  overflow: hidden;
  border-radius: var(--border-radius);
  background: var(--navy-dark);
}
.video-container iframe,
.video-container video {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  border: none;
}

@media(max-width:768px){
  .slides-container {
    position: relative;
    z-index: 1;
  }

  .overlay, .toolbar, .floating-menu {
    z-index: 0;
    pointer-events: none;
  }
}


/* Mobile fix for Open Study Plan button */
@media (max-width: 768px) {
  .study-plan-open {
    padding: 0.6rem 1rem !important;
    font-size: 0.85rem !important;
    white-space: nowrap !important;
    width: max-content !important;
    flex: none !important;
  }
}
/* Mobile fix for Edit in Google Slides button */
@media (max-width: 768px) {
  .notebook-edit-slides {
    padding: 0.5rem 1rem !important;
    font-size: 0.85rem !important;
    width: auto !important;
    max-width: 100%;
    justify-content: center;
  }
}
/* FINAL MOBILE FIX FOR VIDEO LESSONS (GOOGLE DRIVE IFRAMES) */
/* Reverted broken absolute positioning overrides to maintain standard 16:9 box */
.overlay { display: none !important; }

/* Online Notebook Document Container Fix */
.notebook-document-container {
    width: 100%;
    height: 80vh;
    border-radius: 8px;
    overflow-y: auto;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--navy-lighter);
}

@media (max-width: 768px) {
    .notebook-document-container iframe {
        width: 100%; max-width: 100%;
    }
}


/* Accordion Arrow Animation */
details.accordion-details summary i.ph-caret-down {
  transition: transform 0.3s ease;
}
details.accordion-details[open] summary i.ph-caret-down {
  transform: rotate(180deg);
}