/* static/css/style.css */
/* ———————————————————————————————————————————
   Global Palette & Resets
   ——————————————————————————————————————————— */
:root {
  --primary: #1967d2;
  --primary-dark: #1453ad;
  --primary-light: #1AA7EC;
  --primary-shadow: rgba(0, 153, 255, 0.3);
  --secondary: #6c757d;
  --text: #333;
  --text-light: #666;
  --bg: #fff;
  --navbar-height: 60px;
  --gradient-primary: linear-gradient(135deg, #1967d2 0%, #1453ad 100%);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(to bottom, #f5f7fa 0%, #e8f0fe 100%);
  background-attachment: fixed;
  line-height: 1.5;
  min-height: 100vh;
}

/* ———————————————————————————————————————————
   Layout Container
   ——————————————————————————————————————————— */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ———————————————————————————————————————————
   Header & Nav
   ——————————————————————————————————————————— */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 153, 255, 0.15);
  border-bottom: 2px solid rgba(0, 153, 255, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.nav-header .brand {
  padding-left: 1rem;
  transition: transform 0.3s ease;
}

.nav-header .brand:hover {
  transform: scale(1.05);
}

.nav-header .brand img {
  height: 45px;
  filter: drop-shadow(0 2px 4px rgba(0, 153, 255, 0.2));
}

.nav-buttons {
  display: flex;
  gap: 0.75rem;
  padding: 0 1rem;
}
.nav-buttons a {
  margin: 0;
}
.nav-buttons .btn {
  padding: 0.6rem 1.25rem;
  font-weight: 600;
  border-radius: 8px;
}

/* ———————————————————————————————————————————
   Buttons
   ——————————————————————————————————————————— */
.btn {
  display: inline-block;
  text-decoration: none;
  border: none;
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  background: var(--gradient-primary);
  text-align: center;
  color: #fff;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 153, 255, 0.25);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-2px);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(0, 153, 255, 0.4);
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 153, 255, 0.3);
}

.back-btn {
  background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%);
  box-shadow: 0 4px 12px rgba(108, 117, 125, 0.25);
}

.back-btn:hover {
  box-shadow: 0 6px 20px rgba(108, 117, 125, 0.4);
  color: #ffffff;
}

.logout-btn {
  background: linear-gradient(135deg, #1967d2 0%, #1453ad 100%);
}

/* ———————————————————————————————————————————
   Main & Footer
   ——————————————————————————————————————————— */
main.container {
  padding: 2rem 1rem;
  min-height: calc(100vh - 200px);
}

footer {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  text-align: center;
  padding: 1.5rem 0;
  margin-top: 3rem;
  font-size: 0.9rem;
  color: var(--text-light);
  border-top: 2px solid rgba(0, 153, 255, 0.1);
  box-shadow: 0 -4px 20px rgba(0, 153, 255, 0.1);
}

.footer-text {
  font-weight: 500;
}

/* ———————————————————————————————————————————
   Content Wrapper
   ——————————————————————————————————————————— */
.content-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ———————————————————————————————————————————
   Responsive Design
   ——————————————————————————————————————————— */
@media (max-width: 768px) {
  .nav-header .brand img {
    height: 35px;
  }
  
  .nav-buttons {
    gap: 0.5rem;
  }
  
  .nav-buttons .btn {
    padding: 0.5rem 0.85rem;
    font-size: 0.9rem;
  }
  
  main.container {
    padding: 1.5rem 1rem;
  }
}

@media (max-width: 480px) {
  .nav-header {
    padding: 0.5rem 0;
  }
  
  .nav-header .brand {
    padding-left: 0.5rem;
  }
  
  .nav-header .brand img {
    height: 30px;
  }
  
  .nav-buttons {
    padding: 0 0.5rem;
    gap: 0.35rem;
  }
  
  .nav-buttons .btn {
    padding: 0.4rem 0.75rem;
    font-size: 0.85rem;
  }
}