/* ========================================
   LINDI - CSS Unificado com Variáveis
   ======================================== */

/* CSS Variables (Custom Properties) */
:root {
  /* Colors */
  --color-primary: #2c5530;
  --color-secondary: #7aadff;
  --color-accent: #00ff51;
  --color-success: #4CAF50;
  --color-success-hover: #45a049;
  --color-text: #333333;
  --color-text-light: #ffffff;
  --color-text-muted: #666666;
  --color-background: #ffffff;
  --color-background-dark: #000000;
  --color-border: #dddddd;
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-overlay: rgba(0, 0, 0, 0.8);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Typography */
  --font-family-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-family-secondary: 'Cinzel', serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-xxl: 1.5rem;
  --font-size-h1: 2rem;
  --font-size-h2: 1.75rem;
  --font-size-h3: 1.5rem;
  
  /* Border radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 20px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px var(--color-shadow);
  --shadow-md: 0 4px 8px var(--color-shadow);
  --shadow-lg: 0 8px 16px var(--color-shadow);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ========================================
   Reset e Configurações Básicas
   ======================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  padding-top: 80px; /* Espaço para navbar fixa */
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ========================================
   Acessibilidade
   ======================================== */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-text-light);
  padding: var(--spacing-sm);
  text-decoration: none;
  z-index: var(--z-tooltip);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-normal);
}

.skip-link:focus {
  top: 6px;
}

/* Focus styles for accessibility */
*:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ========================================
   Layout Components
   ======================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.main-content {
  flex: 1;
  padding: var(--spacing-lg) 0;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
  background-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  display: flex;
  align-items: center;
  color: var(--color-text-light);
  text-decoration: none;
  font-weight: bold;
  transition: var(--transition-normal);
}

.navbar-brand:hover {
  color: var(--color-text-light);
  opacity: 0.9;
}

.navbar-logo {
  max-height: 40px;
  margin-right: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
}

.nav-link {
  color: var(--color-text-light);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  transition: var(--transition-normal);
  border-radius: var(--border-radius-sm);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-text-light);
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
  background-color: rgba(255, 255, 255, 0.2);
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-md) 0;
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }

p {
  margin: 0 0 var(--spacing-md) 0;
}

.lead {
  font-size: var(--font-size-lg);
  font-weight: 300;
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-normal);
  font-size: var(--font-size-base);
  font-weight: 500;
}

.btn--primary {
  background-color: var(--color-success);
  color: var(--color-text-light);
}

.btn--primary:hover {
  background-color: var(--color-success-hover);
}

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

.btn--secondary:hover {
  background-color: #1e3a22;
}

/* ========================================
   Cards and Containers
   ======================================== */
.card {
  background: var(--color-background);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.video-container {
  background-color: rgba(44, 85, 48, 0.1);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-sm);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.video-container:hover {
  box-shadow: var(--shadow-md);
}

/* ========================================
   Professor Information
   ======================================== */
.professor-info {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
}

.professor-img {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: var(--border-radius-xl);
  margin-bottom: var(--spacing-lg);
  border: 2px solid var(--color-text-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.professor-img:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.professor-img--default {
  opacity: 0.7;
  filter: grayscale(30%);
  position: relative;
}

.professor-img--default::after {
  content: "Foto não disponível";
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.professor-details {
  margin-top: var(--spacing-md);
}

.professor-details p {
  margin: var(--spacing-xs) 0;
  font-size: var(--font-size-sm);
  line-height: 1.4;
}

/* ========================================
   Videos
   ======================================== */
.video-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  width: 100%;
}

.video-item {
  margin: 0;
  width: 100%;
  display: block;
}

.video-container iframe {
  width: 100%;
  height: 315px;
  border: none;
  border-radius: var(--border-radius-sm);
}

.lazy-video {
  background-color: var(--color-background-dark);
  border-radius: var(--border-radius-sm);
}

/* ========================================
   Popups and Modals
   ======================================== */
.popup {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-overlay);
  justify-content: center;
  align-items: center;
  z-index: var(--z-modal);
}

.popup--active {
  display: flex;
}

.popup-content {
  position: relative;
  background: var(--color-background);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
}

.bemvindo-box {
  display: block;
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(232, 247, 228, 0.95);
  border: 2px solid var(--color-primary);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
  width: 300px;
  text-align: center;
}

.info-box {
  display: none;
  position: fixed;
  left: 50%;
  top: 30%;
  transform: translate(-50%, -50%);
  background-color: rgb(217, 248, 217);
  border: 1px solid rgb(93, 161, 104);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
  width: 300px;
  text-align: center;
}

.info-image {
  width: 100px;
  height: auto;
  margin-bottom: var(--spacing-md);
  border-radius: var(--border-radius-sm);
}

.info-text p {
  margin: 0;
  font-size: var(--font-size-sm);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background-color: rgba(44, 85, 48, 0.8);
  padding: var(--spacing-xl) 0;
  text-align: center;
  margin-top: auto;
}

.footer a {
  color: var(--color-text-light);
  text-decoration: none;
}

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

/* ========================================
   Utility Classes
   ======================================== */
.mt-5 { margin-top: var(--spacing-xxl); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.my-5 { margin: var(--spacing-xxl) 0; }

.no-data {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-muted);
  font-style: italic;
}

/* ========================================
   Responsive Design (Mobile First)
   ======================================== */

/* Small devices (phones, 576px and down) */
@media (max-width: 576px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .navbar-brand {
    font-size: var(--font-size-sm);
  }
  
  .navbar-logo {
    max-height: 30px;
  }
  
  .professor-img {
    width: 70px;
    height: 70px;
  }
  
  .video-container iframe {
    height: 200px;
  }
  
  .bemvindo-box,
  .info-box {
    width: 95%;
    padding: var(--spacing-lg);
  }
  
  .popup-content {
    padding: var(--spacing-lg);
  }
  
  h1 { font-size: var(--font-size-h2); }
  h2 { font-size: var(--font-size-h3); }
}

/* Medium devices (tablets, 768px and down) */
@media (max-width: 768px) {
  .professor-img {
    width: 80px;
    height: 80px;
  }
  
  .video-container iframe {
    height: 250px;
  }
  
  .video-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
  }
  
  .bemvindo-box,
  .info-box {
    width: 80%;
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .video-grid {
    grid-template-columns: repeat(3, 1fr) !important;
    max-width: 1200px;
    margin: var(--spacing-lg) auto;
  }
  
  .professor-img {
    width: 120px;
    height: 120px;
  }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
  .video-grid {
    grid-template-columns: repeat(3, 1fr) !important;
    max-width: 1400px;
    margin: var(--spacing-lg) auto;
  }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .navbar,
  .footer,
  .popup,
  .bemvindo-box,
  .info-box {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .video-container iframe {
    display: none;
  }
  
  .professor-img {
    width: 80px;
    height: 80px;
  }
}