/* 
 * Learvion Code School LMS - Core Stylesheet
 * Clean, minimalist, responsive and professional design.
 */

:root {
  --color-bg: #f8fafc;
  --color-card: #ffffff;
  --color-border: #e2e8f0;
  --color-text-main: #0f172a;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-whatsapp: #16a34a;
  --color-whatsapp-hover: #15803d;
  --color-whatsapp-light: #f0fdf4;
  --color-error-bg: #fef2f2;
  --color-error-text: #991b1b;
  --color-error-border: #fecaca;
  --color-warning-bg: #fffbeb;
  --color-warning-text: #92400e;
  --color-warning-border: #fde68a;
  --color-success-bg: #f0fdf4;
  --color-success-text: #166534;
  --color-success-border: #bbf7d0;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.06);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
}

/* App Navbar */
.navbar {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  padding: 0.875rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
}

.nav-logo {
  height: 36px;
  max-width: 180px;
  width: auto;
  object-fit: contain;
  display: block;
}

.nav-brand-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: -0.01em;
}

.nav-badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.user-pill {
  display: flex;
  flex-direction: column;
  text-align: right;
  font-size: 0.8125rem;
}

.user-name {
  font-weight: 600;
  color: var(--color-text-main);
}

.user-email {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.75rem 1.25rem;
  flex: 1;
}

.auth-container {
  max-width: 440px;
  margin: 4rem auto;
}

/* Brand Header on Login */
.brand-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.login-logo {
  height: 60px;
  max-width: 240px;
  width: auto;
  object-fit: contain;
  margin: 0 auto 1rem auto;
  display: block;
}

.brand-title {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* Cards */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

/* Form Controls */
.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-main);
  margin-bottom: 0.375rem;
}

input[type="email"],
input[type="text"] {
  width: 100%;
  padding: 0.625rem 0.75rem;
  font-size: 0.9375rem;
  color: var(--color-text-main);
  background-color: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
}

input[type="email"]:focus,
input[type="text"]:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

input:disabled {
  background-color: #f1f5f9;
  cursor: not-allowed;
}

/* Buttons */
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--color-text-main);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #f8fafc;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-xs {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.btn-whatsapp {
  background-color: var(--color-whatsapp-light);
  color: var(--color-whatsapp);
  border: 1px solid #bbf7d0;
}

.btn-whatsapp:hover {
  background-color: #dcfce7;
  color: var(--color-whatsapp-hover);
}

.btn-course-completed {
  background-color: var(--color-success-bg) !important;
  color: var(--color-success-text) !important;
  border: 1px solid var(--color-success-border) !important;
  cursor: default !important;
}

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Alerts */
#alert-container {
  margin-bottom: 1.25rem;
}

.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  padding: 0.75rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  line-height: 1.4;
  border: 1px solid transparent;
}

.alert-icon {
  font-weight: 700;
  font-size: 0.9375rem;
  flex-shrink: 0;
}

.alert-error {
  background-color: var(--color-error-bg);
  color: var(--color-error-text);
  border-color: var(--color-error-border);
}

.alert-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning-text);
  border-color: var(--color-warning-border);
}

.alert-success {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
  border-color: var(--color-success-border);
}

/* Dashboard Elements */
.welcome-banner {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
}

.welcome-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
}

.welcome-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.125rem;
}

.welcome-badges {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
  border: 1px solid var(--color-success-border);
}

.badge-neutral {
  background-color: #f1f5f9;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.badge-completed {
  background-color: #dcfce7;
  color: #15803d;
  border: 1px solid #86efac;
}

.badge-incomplete {
  background-color: #f1f5f9;
  color: #64748b;
  border: 1px solid var(--color-border);
}

/* Course Card & Progress Bar */
.course-card {
  border-left: 4px solid var(--color-primary);
}

.course-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.course-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.course-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.progress-container {
  margin: 1.25rem 0;
  padding: 0.875rem 1rem;
  background-color: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.progress-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  margin-bottom: 0.5rem;
}

.progress-label {
  font-weight: 600;
  color: var(--color-text-main);
}

.progress-percent {
  font-weight: 700;
  color: var(--color-primary);
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  background-color: #e2e8f0;
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: 9999px;
  transition: width 0.3s ease;
}

.course-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

/* Community Section */
.community-card {
  background: #f8fafc;
  border: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
}

.community-header {
  margin-bottom: 0.875rem;
}

.community-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.community-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.community-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Curriculum Section */
.curriculum-header {
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.curriculum-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.curriculum-count {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Module Card */
.module-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.module-header {
  background: #f8fafc;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.module-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.module-badge {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: #ffffff;
  border: 1px solid var(--color-border);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
}

/* Lesson Items */
.lesson-list {
  list-style: none;
}

.lesson-item {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
  flex-wrap: wrap;
}

.lesson-item:last-child {
  border-bottom: none;
}

.lesson-item:hover {
  background-color: #fafbfc;
}

.lesson-main-info {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  flex: 1;
  min-width: 240px;
}

.lesson-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.lesson-title-text {
  font-weight: 600;
  color: var(--color-text-main);
}

.lesson-item-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Lesson Viewer View */
.viewer-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.viewer-header-card {
  margin-bottom: 1.25rem;
}

.viewer-meta {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.viewer-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 0.75rem;
}

.viewer-actions-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.viewer-save-feedback {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-success-text);
  background-color: var(--color-success-bg);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-success-border);
}

/* Video Player Container */
.video-card {
  padding: 0;
  overflow: hidden;
  background: #000;
  border: 1px solid var(--color-border);
}

.video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: #0f172a;
}

.video-wrapper iframe,
.video-wrapper video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Fallback Video Container */
.fallback-video-box {
  padding: 3rem 1.5rem;
  text-align: center;
  background-color: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.fallback-video-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  display: block;
}

.fallback-video-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.375rem;
}

.fallback-video-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto 1.25rem auto;
}

/* Viewer Navigation Bar */
.viewer-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

/* Loading state */
.loading-box {
  padding: 2rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 1.25rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background-color: var(--color-card);
  margin-top: auto;
}

/* Utilities */
.hidden {
  display: none !important;
}

@media (max-width: 640px) {
  .welcome-banner {
    flex-direction: column;
    align-items: flex-start;
  }
  .community-buttons {
    flex-direction: column;
  }
  .btn-whatsapp {
    width: 100%;
  }
  .course-actions {
    width: 100%;
  }
  .course-actions .btn {
    width: 100%;
  }
  .lesson-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .lesson-item-actions {
    width: 100%;
    justify-content: flex-start;
  }
  .viewer-nav-bar {
    flex-direction: column;
  }
  .viewer-nav-bar .btn {
    width: 100%;
  }
  .user-pill {
    display: none;
  }
}