/* ============================================
   WALLPARI ANALYTICS - OPTIMIZED STYLES
   Version: 2.0 | Optimized & Minified
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&family=Open+Sans:wght@400;600&display=swap');

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
  /* Color palette */
  --primary-dark: #05172f;
  --primary: #0a3d62;
  --teal: #00a79d;
  --purple: #7e3e97;
  --orange: #ff8552;
  --light-bg: #f5f8fc;
  --text-dark: #0a2540;
  --text-light: #f5f5f5;

  /* Typography */
  --heading-font: 'Montserrat', sans-serif;
  --body-font: 'Open Sans', sans-serif;

  /* Font sizes */
  --font-xs: 0.75rem;
  --font-sm: 0.85rem;
  --font-base: 1rem;
  --font-lg: 1.15rem;
  --font-xl: 1.5rem;
  --font-2xl: 2rem;
  --font-3xl: 2.5rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-round: 50%;
  --radius-pill: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-xl: 0 8px 32px rgba(0,0,0,0.3);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--teal) 100%);
  --gradient-header: linear-gradient(135deg, var(--teal), var(--purple));

  /* Overlays */
  --overlay-dark: rgba(5,23,47,0.7);
  --overlay-light: rgba(5,23,47,0.85);
}

/* ============================================
   GLOBAL RESETS
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--body-font);
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--light-bg);
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: #fff;
  padding: 8px;
  text-decoration: none;
  z-index: 100000;
}

.skip-link:focus {
  top: 0;
}

.flex-center-wrap {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.hover-teal:hover {
  color: var(--teal);
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
}

.reveal-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* ============================================
   NAVIGATION
   ============================================ */
header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 999;
  background-color: var(--primary-dark);
  box-shadow: var(--shadow-sm);
}

.navbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  padding: 0.75rem var(--space-lg);
  width: 100%;
  flex-wrap: wrap;
}

.logo {
  font-size: var(--font-xl);
  color: var(--text-light);
  font-family: var(--heading-font);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  white-space: nowrap;
  margin-right: var(--space-xl);
}

.logo i {
  color: var(--teal);
  font-size: 1.8rem;
}

.logo img {
  height: 2.4rem;
  width: auto;
}

/* Hamburger menu */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  width: 2rem;
  height: 2rem;
  position: relative;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  position: absolute;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--text-light);
  transition: transform var(--transition-base);
}

.nav-toggle-label span {
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle-label span::before {
  content: '';
  top: -8px;
}

.nav-toggle-label span::after {
  content: '';
  bottom: -8px;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: var(--space-md);
  flex-grow: 1;
  margin-right: var(--space-md);
}

.nav-menu li a {
  color: var(--text-light);
  font-weight: 600;
  padding: var(--space-sm) 0.75rem;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-menu li a:hover,
.nav-menu li a:active {
  color: var(--teal);
}

/* Language selector */
.lang-select {
  margin-left: auto;
  flex-shrink: 0;
  padding-left: var(--space-md);
}

.lang-list {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--text-light);
  transition: background-color var(--transition-fast);
}

.lang-option.active {
  background-color: var(--teal);
}

.lang-option img {
  width: 1.4rem;
  height: var(--font-base);
  display: block;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  background-color: #05172f; /* Color base para evitar flash blanco */
  background-size: cover;
  background-position: center;
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  padding: var(--space-xl);
  text-align: center;
  overflow: hidden;
}

.hero.dynamic {
  animation: moveBG 80s linear infinite;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--overlay-dark);
  z-index: 0;
}

.hero-content {
  position: relative;
  max-width: 700px;
  z-index: 1;
}

.hero-logo {
  width: 5rem;
  margin: 0 auto var(--space-md);
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.4));
}

.hero h1 {
  font-family: var(--heading-font);
  font-size: var(--font-3xl);
  margin-bottom: var(--space-md);
  white-space: nowrap;
}

.hero p {
  font-size: var(--font-lg);
  margin-bottom: var(--space-xl);
  color: #dce4f6;
}

/* ============================================
   SECTIONS & CARDS
   ============================================ */
section {
  padding: var(--space-3xl) var(--space-lg);
}

.section-title {
  font-family: var(--heading-font);
  font-size: var(--font-2xl);
  text-align: center;
  margin-bottom: var(--space-xl);
  color: var(--primary);
  white-space: nowrap;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.card {
  background-color: var(--text-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card i {
  font-size: var(--font-2xl);
  margin-bottom: 0.75rem;
  color: var(--teal);
}

.card h3 {
  font-family: var(--heading-font);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--primary);
}

.card p {
  font-size: 0.95rem;
  color: var(--text-dark);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.75rem var(--space-lg);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background var(--transition-base);
  font-family: var(--heading-font);
  border: none;
  cursor: pointer;
}

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

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

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

.btn-secondary:hover {
  background-color: var(--purple);
}

/* ============================================
   STATS
   ============================================ */
.stats {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  max-width: 1000px;
  margin: 0 auto;
}

.stat {
  background-color: var(--text-light);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  flex: 1 1 250px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.stat-number {
  font-family: var(--heading-font);
  font-size: 2.5rem;
  color: var(--teal);
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: var(--font-base);
  color: var(--primary);
}

/* ============================================
   MODALS - BASE
   ============================================ */
.modal, .news-modal, .login-modal, .prompting-modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: var(--overlay-light);
  backdrop-filter: blur(5px);
  animation: fadeIn var(--transition-base);
}

.modal.show, .news-modal.show, .login-modal.show, .prompting-modal.show {
  display: block;
}

.login-modal.show, .prompting-modal.show {
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-content, .news-modal-content, .login-modal-content, .prompting-modal-content {
  position: relative;
  background-color: var(--light-bg);
  margin: 3% auto;
  padding: 0;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  animation: slideDown 0.3s ease-out;
}

.news-modal-content {
  width: 90%;
  max-width: 900px;
  max-height: 85vh;
  overflow: hidden;
}

.login-modal-content {
  background: linear-gradient(135deg, #ffffff 0%, #f5f8fc 100%);
  width: 90%;
  max-width: 500px;
  border-radius: 15px;
  animation: slideDown 0.4s ease-out;
}

.prompting-modal-content {
  background: white;
  border-radius: 15px;
  width: 95%;
  max-width: 1400px;
  height: 90vh;
  display: flex;
  flex-direction: column;
  animation: slideDown 0.4s ease-out;
}

/* Modal headers */
.modal-header, .news-modal-header, .login-modal-header, .prompting-modal-header {
  background: var(--gradient-header);
  color: var(--text-light);
  padding: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.news-modal-header {
  background: var(--gradient-primary);
}

.modal-header h2, .news-modal-header h2, .login-modal-header h2, .prompting-modal-header h2 {
  margin: 0;
  font-family: var(--heading-font);
  font-size: var(--font-xl);
}

/* Modal close buttons */
.modal-close, .news-modal-close, .login-modal-close, .prompting-modal-close, .close-modal-btn {
  color: var(--text-light);
  font-size: var(--font-2xl);
  font-weight: bold;
  background: none;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast);
  line-height: 1;
  padding: 0;
  width: 2rem;
  height: 2rem;
}

.modal-close:hover, .news-modal-close:hover, .login-modal-close:hover, .prompting-modal-close:hover, .close-modal-btn:hover {
  transform: scale(1.2) rotate(90deg);
}

/* ============================================
   NEWS MODAL SPECIFIC
   ============================================ */
.news-tabs {
  display: flex;
  background-color: var(--primary-dark);
  border-bottom: 2px solid var(--teal);
}

.news-tab {
  flex: 1;
  padding: var(--space-md);
  background-color: transparent;
  color: var(--text-light);
  border: none;
  cursor: pointer;
  font-family: var(--heading-font);
  font-weight: 600;
  transition: background-color var(--transition-base);
}

.news-tab:hover {
  background-color: rgba(0,167,157,0.2);
}

.news-tab.active {
  background-color: var(--teal);
}

.news-tab-content {
  display: none;
  padding: var(--space-lg);
  max-height: calc(85vh - 200px);
  overflow-y: auto;
}

.news-tab-content.active {
  display: block;
}

.news-card, .research-card {
  background-color: rgba(255,255,255,0.98);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border-left: 4px solid var(--teal);
}

.news-card:hover, .research-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 16px rgba(0,167,157,0.2);
}

.news-card h3, .research-card h3 {
  font-size: 1.1rem;
  margin: 0 0 0.75rem 0;
  color: var(--primary);
  font-weight: 600;
  font-family: var(--heading-font);
}

/* Badges */
.badge {
  display: inline-block;
  padding: var(--space-xs) 0.75rem;
  border-radius: var(--radius-xl);
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-openai {
  background: linear-gradient(135deg, #10a37f, #1a7f64);
  color: white;
}

.badge-google {
  background: linear-gradient(135deg, #4285f4, #34a853);
  color: white;
}

.badge-anthropic {
  background: linear-gradient(135deg, #d4a574, #c49563);
  color: white;
}

.badge-llm {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
}

.badge-tools {
  background: linear-gradient(135deg, #f093fb, #f5576c);
  color: white;
}

.user-badge {
  background: rgba(255,255,255,0.2);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-sm);
  border: 1px solid rgba(255,255,255,0.3);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
}

.login-error {
  background: #f8d7da;
  color: #721c24;
  padding: 0.75rem;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  border-left: 4px solid #f5c6cb;
  font-size: 0.9rem;
}

.login-modal-body {
  padding: var(--space-xl);
}

.login-modal-body input[type="text"] {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #ddd;
  border-radius: var(--radius-lg);
  font-size: var(--font-base);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.login-modal-body input[type="text"]:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(0,167,157,0.1);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  background-color: var(--primary-dark);
  color: var(--text-light);
  padding: var(--space-lg);
  text-align: center;
  font-size: 0.875rem;
}

footer a {
  color: var(--teal);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideDown {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes moveBG {
  from { background-position: 0 0; }
  to { background-position: 1000px 500px; }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 992px) {
  .logo {
    flex: 0 0 auto;
  }
  .nav-menu {
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  .nav-toggle-label {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    flex-direction: column;
    background-color: var(--primary-dark);
    overflow: hidden;
    max-height: 0;
    transition: max-height var(--transition-base);
  }

  .nav-menu li {
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
  }

  .nav-toggle:checked + .nav-toggle-label span {
    background: transparent;
  }

  .nav-toggle:checked + .nav-toggle-label span::before {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle:checked + .nav-toggle-label span::after {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .nav-toggle:checked ~ .nav-menu {
    max-height: 300px;
  }

  .lang-select {
    margin: var(--space-sm) 0 0;
  }

  .news-modal-content {
    width: 95%;
    margin: 5% auto;
    max-height: 90vh;
  }

  .login-modal-content {
    width: 95%;
    margin: var(--space-md);
  }

  .prompting-modal-content {
    width: 100%;
    height: 100%;
    border-radius: 0;
  }

  .form-actions {
    flex-direction: column;
  }

  .form-actions button {
    width: 100%;
  }
}