/* =====================
   Global CSS Variables
   ===================== */
:root {

  /* =====================
   Border Radius
   ===================== */
  /* Border Radius */
  --radius-xs: 0.25rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;

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

  /* =====================
   Blur Effects
   ===================== */
  --blur-xs: blur(2px);
  --blur-sm: blur(4px);
  --blur-md: blur(8px);
  --blur-lg: blur(16px);


/*/////////////////////////////////////////////*/

  /* =====================
   Main Colors
   ===================== */
  /* Primary*/
  --color-primary: rgb(255, 215, 129);

  --color-primary-semi-transparent: rgba(255, 215, 129, 0.7);
  --color-primary-transparent: rgba(255, 215, 129, 0.2);

  /* Primary Hover*/
  --color-primary-hover: rgb(240, 96, 0);
  --color-primary-hover-semi-transparent: rgba(240, 96, 0, 0.7);
  --color-primary-hover-transparent: rgba(240, 96, 0, 0.2);


  /* Secondary */
  --color-secondary: rgba(17, 24, 39, 0.4);

  /* Neon */
  --color-neon-blue: rgb(255, 215, 129);  
  --color-neon-purple: rgb(240, 96, 0);

  /*Gradient*/
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  --gradient-primary-revert: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary));
  --gradient-primary-semi-transparent: linear-gradient(135deg, var(--color-primary-semi-transparent), var(--color-primary-hover-semi-transparent));
  --gradient-primary-transparent: linear-gradient(135deg, var(--color-primary-transparent), var(--color-primary-hover-transparent));
  --gradient-dark-overlay: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);



  /* Backgrounds */
  --color-bg: rgba(17, 24, 39, 0.6);
  --color-bg-alt: rgba(15, 20, 35, 0.6);

  /* Border */
  --color-border: rgba(255, 255, 255, 0.15);
  /* =====================
   Other Colors
   ===================== */
  /* Grey */
  --color-grey: rgb(107, 114, 128);
  --color-grey-dark: rgb(75, 85, 99);
  --color-grey-semi-transparent: rgba(107, 114, 128, 0.5);
  --color-grey-transparent: rgba(107, 114, 128, 0.2);

  /* Red */
  --color-red: rgb(239, 68, 68);
  --color-red-dark: rgb(185, 28, 28);
  --color-red-semi-transparent: rgba(239, 68, 68, 0.5);
  --color-red-transparent: rgba(239, 68, 68, 0.3);

  /* Green */
  --color-green: rgb(34, 197, 94);
  --color-green-dark: rgb(22, 163, 74);
  --color-green-semi-transparent: rgba(34, 197, 94, 0.5);
  --color-green-transparent: rgba(34, 197, 94, 0.3);

  /* Texts */
  --color-text: rgb(255, 255, 255);
  --color-text-light: rgba(255, 255, 255, 0.8);

  
  /* =====================
   Shadows Colors
   ===================== */
  --neon-shadow: 0 0 10px rgba(255, 215, 129, 0.5),
                 0 0 20px rgba(255, 215, 129, 0.3),
                 0 0 30px rgba(240, 96, 0, 0.2);
  --neon-shadow-purple: 0 0 10px rgba(240, 96, 0, 0.5),
                        0 0 20px rgba(240, 96, 0, 0.5),
                        0 0 30px rgba(240, 96, 0, 0.5),
                        0 0 40px rgba(240, 96, 0, 0.5);
  --neon-shadow-red: 0 0 10px rgba(239, 68, 68, 0.2),
                        0 0 20px rgba(239, 68, 68, 0.2),
                        0 0 30px rgba(239, 68, 68, 0.2),
                        0 0 40px rgba(239, 68, 68, 0.2);
  --neon-shadow-green: 0 0 10px rgba(34, 197, 94, 0.2),
                        0 0 20px rgba(34, 197, 94, 0.2),
                        0 0 30px rgba(34, 197, 94, 0.2),
                        0 0 40px rgba(34, 197, 94, 0.2);
  

  /* =====================
   Shadows Sizes
   ===================== */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);

}



/* =====================
   CSS Reset
   ===================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: url('../assets/lightBG2.jpg') no-repeat center center fixed;
  background-size: cover;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: -1;
  height: 100%;
}

/* =====================
   Scrollbar
   ===================== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(17, 24, 39, 0.2);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, 
    var(--color-neon-blue) 0%,
    var(--color-neon-purple) 100%);
  border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, 
    var(--color-neon-purple) 0%,
    var(--color-neon-blue) 100%);
}

/* Hover gradient effect */
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* =====================
   Typography
   ===================== */
   p {
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
    font-size: 0.9rem;
  }
  h1 {
    font-size: 2.4rem;
    font-weight: bold;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  h2 {
    font-size: 2.2rem;
    font-weight: 700;
    padding: 0.2rem;
    margin-bottom: var(--space-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
  }
  h3 {
    color: var(--color-text);
    font-size: 1.7rem;
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    margin-bottom: var(--space-md);
  }
  h4 {
    color: var(--color-text);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.2;
  }

  h5 {
    color: var(--color-text);
    font-size: 1.15rem;
    font-weight: 500;
    line-height: 1;
  }

  h6 {
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1;
  }
  
  i {
    color: var(--color-primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 24px;
    text-align: center;
  }
  
  a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
  }

/* =====================
   Message and Loading Styles
   ===================== */
.message {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease;
    background: var(--color-bg);
    border: none;
    color: var(--color-text);
}

.message.success {
    background: var(--color-green-transparent);
    border-color: var(--color-green-dark);
}

.message.success i {
    background: var(--color-green-dark);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.message.error {
    background: var(--color-red-transparent);
    border-color: var(--color-red-dark);
}

.message.error i {
    background: var(--color-red-dark);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loading {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    background: var(--color-bg);
    color: var(--color-text);
}

.loading i {
    animation: spin 1s linear infinite;
}

/* =====================
   Button Styles
   ===================== */

.btn {
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem var(--space-md);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
  gap: var(--space-sm);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--gradient-primary-transparent);
  color: var(--color-text);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
}

.btn-primary i {
  font-size: 1rem;
}

.btn-primary:hover {
  background: var(--gradient-primary);
  box-shadow: var(--shadow-sm);
  box-shadow: var(--neon-shadow);
}

.btn-primary:hover i{
  background: var(--color-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.btn-secondary:hover {
  background:var(--gradient-primary);
  box-shadow: var(--shadow-sm);
  box-shadow: var(--neon-shadow);
}

.btn-secondary:hover i{
  background: var(--color-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-danger {
  background: var(--color-red-transparent);
  color: var(--color-text);
}

.btn-danger i{
  background: var(--color-red-dark);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-danger:hover {
  background: var(--color-red-dark);
  box-shadow: var(--shadow-sm);
  box-shadow: var(--neon-shadow-red);
}

.btn-danger:hover i{
  background: var(--color-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-add {
  background: var(--color-green-transparent);
  color: var(--color-text);
}

.btn-add i{
  background: var(--color-green);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-add:hover {
  background: var(--color-green-dark);
  box-shadow: var(--shadow-sm);
  box-shadow: var(--neon-shadow-green);
}

.btn-add:hover i{
  background: var(--color-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn:disabled {
  background: var(--color-grey-semi-transparent);
  color: var(--color-text);
  cursor: not-allowed;
}

.btn:hover:disabled {
  transform: none;
  box-shadow: none;
}

/* =====================
   Modal Button Styles
   ===================== */
   .modal-close {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: var(--color-secondary);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .modal-close:hover {
    background: var(--gradient-primary);
    transform: rotate(90deg);
    box-shadow: var(--neon-shadow);
  }
  
  .modal-close:hover i {
    background: var(--color-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

/* =====================
   Section Divider
   ===================== */
   .section-divider {
    border: none;
    background: var(--gradient-primary);
    height: 2px;
    width: 70%;
    margin: 0 auto;
    margin-bottom: var(--space-md);
    border-radius: var(--radius-md);
   }

/* =====================
   Animations
   ===================== */

@keyframes slideIn {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* =====================
   RESPONSIVE DESIGN
   ===================== */

/* Tablette (768px et moins) */
@media (max-width: 768px) {
  :root {
    --space-xs: 0.375rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.25rem;
    --space-xl: 2rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  h4 {
    font-size: 1.125rem;
  }

  .btn {
    padding: 0.625rem var(--space-sm);
    font-size: 0.8rem;
  }

  body {
    padding: 0 var(--space-xs);
  }
}

/* Mobile (576px et moins) */
@media (max-width: 576px) {
  :root {
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.5rem;
  }

  h1 {
    font-size: 1.75rem;
    text-align: center;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .btn {
    padding: 0.5rem var(--space-sm);
    font-size: 0.75rem;
    min-height: 44px; /* Accessibility touch target */
  }

  .message {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }

  ::-webkit-scrollbar {
    width: 4px;
    height: 4px;
  }

  /* Disable hover effects on mobile */
  .btn:hover {
    transform: none;
  }
}