:root {
    /* Modern Gradient Color System */
    --primary-color: #667eea;
    --secondary-color: #00f2fe;
    --primary-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --error-gradient: linear-gradient(135deg, #ff6b6b 0%, #ee5a52 100%);
    
    /* Base Colors */
    --accent-color: #f5576c;
    --success: #43e97b;
    --warning: #fa709a;
    --error: #ff6b6b;
    
    /* Background System */
    --dark-bg: #0a0a0a;
    --surface: rgba(255, 255, 255, 0.05);
    --surface-light: rgba(255, 255, 255, 0.1);
    --surface-elevated: rgba(255, 255, 255, 0.15);
    --glass-bg: rgba(255, 255, 255, 0.08);
    
    /* Text Colors */
    --text-color: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.7);
    --text-secondary: rgba(255, 255, 255, 0.6);
    --light-text-color: #ffffff;
    
    /* Border and Effects */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --border-radius-lg: 20px;
    
    /* Shadows and Glows */
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 25px 50px rgba(0, 0, 0, 0.4);
    --glow: 0 0 30px rgba(102, 126, 234, 0.5);
    --glow-secondary: 0 0 30px rgba(245, 87, 108, 0.5);
    
    /* Layout */
    --sidebar-width: 320px;
    --sidebar-collapsed-width: 80px;
    --navbar-height: 70px;
    
    /* Animation */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Custom Colors */
    --dark-bg: #1a1a1a;
    --card-bg: #2a2a2a;
    --light-card-bg: #3a3a3a;
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 70px;
}

:root[data-theme='light'] {
    --dark-bg: #f8fafc;
    --surface: rgba(0, 0, 0, 0.03);
    --surface-light: rgba(0, 0, 0, 0.05);
    --surface-elevated: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --text-color: #1a202c;
    --text-muted: rgba(26, 32, 44, 0.7);
    --text-secondary: rgba(26, 32, 44, 0.6);
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 25px 50px rgba(0, 0, 0, 0.15);
    --dark-bg: #ffffff;
    --card-bg: #f9f9f9;
    --light-card-bg: #d8d8d8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    background: var(--dark-bg);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Animated Background */
body::before, .fixed-bg-loader::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(74, 172, 254, 0.1) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite;
}
.fixed-bg-loader::before {
    z-index: 1000;
}
@keyframes backgroundShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* Modern Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border-right: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-normal);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    padding: 30px 25px;
    background: var(--surface-light);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
    max-height: var(--navbar-height);
    position: relative;
    font-size: 14px;
}

.sidebar.collapsed .sidebar-header {
    padding: 20px 15px;
    justify-content: center;
}

/* .brand-icon {
    width: 45px;
    height: 45px;
    background: var(--primary-color);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    box-shadow: var(--glow);
    flex-shrink: 0;
    transition: var(--transition-normal);
} */

.brand-icon:hover {
    transform: scale(1.05);
    box-shadow: var(--glow), var(--shadow);
}

/* .brand-text {
    font-size: 18px;
    font-weight: 700;
    background: var(--secondary-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition-normal);
} */

.sidebar.collapsed .brand-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* Navigation Menu */
.nav-menu {
    padding: 25px 0;
}

.nav-section {
    margin-bottom: 35px;
}

.nav-section-title {
    padding: 0 25px 15px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    transition: var(--transition-normal);
}

.sidebar.collapsed .nav-section-title {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

.nav-item {
    position: relative;
    margin: 0 12px 4px;
}
.nav-link {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-normal);
    z-index: 0;
}

.nav-link:hover::before {
    opacity: 0.1;
}

.nav-link.active::before {
    opacity: 0.15;
}

.nav-link:hover {
    color: var(--text-color);
    transform: translateX(8px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: var(--shadow-sm);
}

.nav-link.active {
    background: var(--surface-light);
    color: white;
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: var(--glow);
}

.nav-icon {
    width: 22px;
    font-size: 18px;
    text-align: center;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.nav-text {
    transition: var(--transition-normal);
    white-space: nowrap;
    position: relative;
    z-index: 1;
}

.sidebar.collapsed .nav-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.nav-badge {
    background: var(--error-gradient);
    color: white;
    font-size: 10px;
    padding: 3px 8px;
    border-radius: 12px;
    margin-left: auto;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 1;
}

.sidebar.collapsed .nav-badge {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* Modern Top Navigation */
.top-nav {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 35px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
    transition: var(--transition-normal);
    height: var(--navbar-height);
}

.top-nav.sidebar-collapsed {
    left: var(--sidebar-collapsed-width);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 25px;
}

.sidebar-toggle {
    width: 45px;
    height: 45px;
    border: none;
    border-radius: 12px;
    background: var(--surface);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.sidebar-toggle:hover {
    background: var(--surface-light);
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--text-secondary);
}

.breadcrumb-current {
    color: var(--text-color);
    font-weight: 600;
}

/* Enhanced Search Bar */
.search-container {
    flex: 1;
    max-width: 600px;
    margin: 0 25px;
    position: relative;
}

.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    padding: 15px 25px 15px 55px;
    border: 1px solid var(--border-color);
    border-radius: 25px;
    background: var(--surface);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    font-size: 15px;
    transition: var(--transition-normal);
    font-weight: 400;
}

.search-input:focus {
    outline: none;
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    background: var(--surface-light);
}

.search-icon {
    position: absolute;
    left: 20px;
    color: var(--text-muted);
    font-size: 16px;
    z-index: 2;
    transition: var(--transition-normal);
}

.search-input:focus + .search-icon {
    color: var(--primary-color);
}

/* Navigation Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}
.nav-actions a {
    text-decoration: none;
}
.nav-button {
    position: relative;
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 14px;
    background: var(--surface);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.nav-button:hover {
    background: var(--surface-light);
    color: var(--text-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.nav-button.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--glow);
}

.notification-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 10px;
    height: 10px;
    background: var(--error-gradient);
    border-radius: 50%;
    border: 2px solid var(--dark-bg);
    animation: pulse 2s infinite;
}

/* User Profile */
.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 5px;
    border-radius: var(--border-radius);
    background: var(--surface);
    cursor: pointer;
    transition: var(--transition-normal);
    margin-left: 20px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}
.user-profile .user-name {
    font-size: 14px;
    color: var(--text-color);
}
.user-profile .user-role {
    font-size: 12px;
    color: var(--text-muted);
}
.user-profile:hover {
    background: var(--surface-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 16px;
    box-shadow: var(--shadow-sm);
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--navbar-height);
    padding: 40px;
    min-height: calc(100vh - var(--navbar-height));
    transition: var(--transition-normal);
    position: relative;
}

.main-content.sidebar-collapsed {
    margin-left: var(--sidebar-collapsed-width);
}

/* Modern Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-normal);
    z-index: 0;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(102, 126, 234, 0.3);
}

.card:hover::before {
    opacity: 0.05;
}

.card > * {
    position: relative;
    z-index: 1;
}

/* Research Cards */
.research-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--border-radius);
    padding: 25px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
    z-index: 2;
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: rgba(102, 126, 234, 0.3);
}

.research-card.status-published::before {
    background: var(--success-gradient);
}

.research-card.status-draft::before {
    background: var(--warning-gradient);
}

.research-card.status-pending::before {
    background: var(--primary-gradient);
}

/* Modern Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    min-height: 50px;
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: all 0.6s ease;
    transform: translate(-50%, -50%);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: var(--glow), var(--shadow);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--surface-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-success {
    background: var(--success-gradient);
    color: white;
    box-shadow: 0 0 30px rgba(67, 233, 123, 0.4);
}

.btn-danger {
    background: var(--error-gradient);
    color: white;
    box-shadow: 0 0 30px rgba(255, 107, 107, 0.4);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}
.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-color);
    cursor: pointer;
    transition: color 0.3s;
}

.modal-close:hover {
    color: var(--primary-color);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}
/* Form Controls */
.form-control {
    width: 100%;
    padding: 15px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--surface);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    font-size: 15px;
    transition: var(--transition-normal);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: var(--surface-light);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* Modern Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    /* opacity: 0; */
    /* visibility: hidden; */
    transition: var(--transition-normal);
}

.star {
    position: absolute;
    background: var(--text-color);
    border-radius: 50%;
    opacity: 1;
    pointer-events: none;
    z-index: 10;
    animation: starTwinkle 4s ease-out forwards;
    box-shadow: 0 0 4px rgba(255, 255, 255, 0.8);
}

.modal.show {
    opacity: 1;
    visibility: visible;
    display: flex;
}

.modal-content {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
    padding: 30px;
    animation: fadeInUp 0.3s;
    position: relative;
}

.modal-content::-webkit-scrollbar, #openalex-results::-webkit-scrollbar {
    display: none;
}

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

/* Apply this animation to any element you want to rotate like stars in the sky */
.star-sky-rotate {
    animation: starSkyRotate 120s linear infinite;
    /* 120s for a slow, sky-like rotation; adjust as needed */
    transform-origin: 50% 50%;
}

.particle-loader-container {
    display: flex;
    gap: 20px;
    position: relative;
    /* background: #ffffff; */
    overflow: hidden;
    transition: all .5s ease;
  }

  .particle-loader-cards-wrapper {
    /* max-width: calc(240px * 4); */
    display: flex;
    flex-flow: row wrap;
    gap: 20px;
    position: relative;
    transition: all .5s ease;
  }

  .particle-loader-card {
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    background: transparent;
    box-shadow: 0 0 1px rgba(0,0,0,0.1);
  }

  .gradient-overlay {
    position: absolute;
    top: -100%;
    left: -100%;
    width: 300%;
    height: 300%;
  background: radial-gradient(circle at center,
      #ff00ff 0%,    /* Bright pink */
      #8a2be2 25%,   /* Purple */
      #00bfff 50%,   /* Bright blue */
      #9932cc 75%,   /* Purple */
      #ff69b4 100%   /* Pink */
  );
    background-size: 400% 400%;
    opacity: 0.9;
    animation: gradient 8s infinite alternate;
  }

  .particle-loader-shape {
    width: 120px;
    height: 120px;
    filter: blur(5px);
    background: #ffffff5b;
    background: linear-gradient(45deg, rgba(255,255,255,0.5), rgba(255,255,255,0.3), rgba(255,255,255,0.5), rgba(255,255,255,0.3));
    border-radius: 50%;
    position: absolute;
    transition: all 2s ease-in-out;
    transform: translate(-50%, -50%);
  }
  /* --- Outer-space star field -------------------- */
    @keyframes starTwinkle {
        0%   { opacity: 0;   transform: scale(0);   }
        25%  { opacity: .35; transform: scale(1);   }
        75%  { opacity: .35; transform: scale(1);   }
        100% { opacity: 0;   transform: scale(0);   }
    }
  @keyframes moveInfinity {
    0%, 100% {
      transform: translate(150px, 100px);
    }
    
    25% {
      transform: translate(250px, 60px);
    }
    
    37.5% {
      transform: translate(150px, 20px);
    }
    
    50% {
      transform: translate(50px, 60px);
    }
    
    62.5% {
      transform: translate(150px, 100px);
    }
    
    75% {
      transform: translate(250px, 140px);
    }
    
    87.5% {
      transform: translate(150px, 180px);
    }
    
    100% {
      transform: translate(50px, 140px);
    }
  }
  .particle-loader-shape.blob {
    animation: blobAnimation 8s infinite;
  }
  @keyframes blobAnimation {
    0%, 100% {
      border-radius: 50%;
    }
    25% {
      border-radius: 62% 38% 70% 30% / 30% 65% 35% 70%;
    }
    50% {
      border-radius: 43% 57% 27% 73% / 73% 27% 73% 27%;
    }
    75% {
      border-radius: 28% 72% 65% 35% / 42% 58% 42% 58%;
    }
  }
  @keyframes bulgeShape {
      0% {
          transform: scale(1) rotate(0deg);
          /* border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; */
          border-radius: 50%;
      }
      50% {
          transform: scale(1.6) rotate(180deg);
          /* border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; */
          border-radius: 62% 38% 70% 30% / 30% 65% 35% 70%;
      }
      100% {
          transform: scale(1) rotate(360deg);
          /* border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; */
          border-radius: 28% 72% 65% 35% / 42% 58% 42% 58%;
      }
  }

  @keyframes bulgeWander {
    0% {
      left: -50px;
      top: 50%;
      opacity: 0;
    }
    10% {
      opacity: 1;
      top: 20%;
    }
    30% {
      top: 70%;
    }
    50% {
      top: 30%;
      left: 40%;
    }
    70% {
      top: 80%;
    }
    90% {
      opacity: 1;
      top: 40%;
    }
    100% {
      left: calc(100% + 50px);
      top: 50%;
      opacity: 0;
    }
  }
@keyframes gradient {
  0% {
      background-position: 0% 50%;
  }
  50% {
      background-position: 100% 50%;
  }
  100% {
      background-position: 0% 50%;
  }
}
  @keyframes gradientMove {
    0% {
      transform: translate(0, 0) rotate(0deg);
    }
    50% {
      transform: translate(-25%, -25%) rotate(-5deg);
    }
    100% {
      transform: translate(-50%, 0) rotate(0deg);
    }
  }

  .particle {
    position: absolute;
    /* background: white; */
    background: var(--text-color);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0;
    z-index: 2;
  }

  @keyframes particleFloat {
    0% {
      transform: translate(var(--startX), var(--startY));
      opacity: 0;
    }
    20% {
      opacity: var(--opacity);
    }
    80% {
      opacity: var(--opacity);
    }
    100% {
      transform: translate(var(--endX), var(--endY));
      opacity: 0;
    }
  }

.modal.show .modal-content {
    transform: scale(1);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 100px;
    right: 30px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 400px;
    width: calc(100vw - 60px);
}

.toast {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: flex-start;
    gap: 15px;
    animation: slideInRight 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    overflow: hidden;
}

.toast::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-gradient);
}

.toast.success::before {
    background: var(--success-gradient);
}

.toast.error::before {
    background: var(--error-gradient);
}

.toast.warning::before {
    background: var(--warning-gradient);
}
.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 18px;
    transition: color 0.3s;
}

.toast-close:hover {
    color: var(--text-color);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Data Grid */
.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 40px 0;
}

.page-btn {
    min-width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-normal);
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.page-btn:hover {
    background: var(--surface-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.page-btn.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--glow);
}

/* Filter Controls */
.filter-controls {
    margin-bottom: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    padding: 25px 30px;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
}

.filter-select {
    padding: 12px 20px;
    border-radius: 25px;
    border: 1px solid var(--border-color);
    background: var(--surface);
    color: var(--text-color);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition-normal);
    backdrop-filter: blur(10px);
}

.filter-select:focus {
    outline: none;
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Quick Actions Panel */
.quick-actions {
    position: fixed;
    bottom: 40px;
    right: 40px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 998;
}

.quick-action-btn {
    width: 60px;
    height: 60px;
    border: none;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: var(--transition-normal);
    box-shadow: var(--glow);
    position: relative;
    overflow: hidden;
}

.quick-action-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: all 0.6s ease;
    transform: translate(-50%, -50%);
}

.quick-action-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--glow), var(--shadow-lg);
}

.quick-action-btn:hover::before {
    width: 100%;
    height: 100%;
}

/* Notifications Panel */
.notifications-panel {
    position: absolute;
    top: 80px;
    right: 20px;
    width: 400px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: none;
    flex-direction: column;
    overflow: hidden;
    max-height: calc(100vh - 120px);
    border: 1px solid var(--border-color);
}

.notifications-panel.show {
    display: flex;
    animation: slideDown 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Empty State */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
}

.empty-state-icon {
    font-size: 80px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 25px;
    opacity: 0.8;
}

.empty-state h3 {
    font-size: 24px;
    color: var(--text-color);
    margin-bottom: 12px;
    font-weight: 600;
}

.empty-state p {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 400px;
    margin-bottom: 30px;
    line-height: 1.6;
}

/* Loading States */
.loading-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

.skeleton {
    background: linear-gradient(90deg, 
        var(--surface) 25%, 
        var(--surface-light) 50%, 
        var(--surface) 75%);
    background-size: 200px 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--border-radius-sm);
}

@keyframes skeleton-loading {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}
.tab-navigation {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 1px solid #3a3a3a;
    overflow-x: auto;
    scrollbar-width: none;
}

.tab-navigation::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    padding: 12px 20px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    transition: color 0.3s;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-color);
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.tab-content {
    display: none;
}

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

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--surface-light);
    font-weight: 600;
    color: var(--text-color);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.table tbody tr {
    transition: var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--surface);
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        padding: 30px;
    }
    
    .data-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 100%;
        --sidebar-collapsed-width: 0px;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .top-nav {
        left: 0;
        padding: 15px 20px;
    }

    .main-content {
        margin-left: 0;
        padding: 25px 20px;
    }

    .search-container {
        margin: 0 15px;
        max-width: none;
    }

    .quick-actions {
        bottom: 25px;
        right: 25px;
    }

    .quick-action-btn {
        width: 55px;
        height: 55px;
        font-size: 18px;
    }

    .data-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .filter-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }

    .toast-container {
        top: 90px;
        right: 15px;
        left: 15px;
        width: auto;
    }

    .modal-content {
        margin: 20px;
        max-width: calc(100vw - 40px);
    }
}

@media (max-width: 480px) {
    .sidebar-header {
        padding: 20px 15px;
    }
    
    .nav-menu {
        padding: 15px 0;
    }
    
    .nav-link {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .top-nav {
        padding: 12px 15px;
    }
    
    .main-content {
        padding: 20px 15px;
    }
    
    .card {
        padding: 20px;
    }
    
    .research-card {
        padding: 20px;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bounce-in {
    animation: bounceIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.slide-up {
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stagger animations for lists */
.stagger-item {
    opacity: 0;
    animation: fadeIn 0.5s ease-out forwards;
}

.stagger-item:nth-child(1) { animation-delay: 0.1s; }
.stagger-item:nth-child(2) { animation-delay: 0.2s; }
.stagger-item:nth-child(3) { animation-delay: 0.3s; }
.stagger-item:nth-child(4) { animation-delay: 0.4s; }
.stagger-item:nth-child(5) { animation-delay: 0.5s; }

/* Pulse animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-contrast: high) {
    :root {
        --border-color: rgba(255, 255, 255, 0.3);
        --text-muted: rgba(255, 255, 255, 0.9);
    }
}

/* Focus indicators */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card,
    .modal-content {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
        background: white !important;
    }
}
.sidebar-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 70px;
}

.sidebar.collapsed .sidebar-header {
    padding: 20px 12px;
    justify-content: center;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    box-shadow: 0 4px 20px var(--glow-color);
    flex-shrink: 0;
}

.go-home {
    cursor: pointer; 
}

.brand-text {
    font-size: 14px;
    font-weight: 700;
    background: var(--secondary-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: opacity 0.3s ease;
}

.sidebar.collapsed .brand-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* Navigation Menu */
.nav-menu {
    padding: 20px 0;
}

.nav-section {
    margin-bottom: 32px;
}

.nav-section-title {
    padding: 0 24px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: opacity 0.3s ease;
}

.sidebar.collapsed .nav-section-title {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

.nav-item {
    position: relative;
    margin: 0 12px 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    border-radius: 12px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.nav-link:hover {
    background: var(--border-color);
    color: var(--text-color);
    transform: translateX(4px);
}

.nav-link.active {
    /* background: var(--primary-color); */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 20px var(--glow-color);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: white;
    border-radius: 0 4px 4px 0;
}

.nav-icon {
    width: 20px;
    font-size: 18px;
    text-align: center;
    flex-shrink: 0;
}

.nav-text {
    transition: opacity 0.3s ease;
    white-space: nowrap;
}

.sidebar.collapsed .nav-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.nav-badge {
    background: var(--error-color);
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 8px;
    margin-left: auto;
    transition: opacity 0.3s ease;
}

.sidebar.collapsed .nav-badge {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* Submenu */
.nav-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    margin-left: 36px;
    margin-top: 4px;
}

.nav-item.expanded .nav-submenu {
    max-height: 300px;
}

.nav-submenu .nav-link {
    padding: 8px 16px;
    font-size: 13px;
    margin: 2px 0;
}

.nav-expand-icon {
    margin-left: auto;
    transition: transform 0.3s ease;
    font-size: 12px;
}

.nav-item.expanded .nav-expand-icon {
    transform: rotate(90deg);
}

.sidebar.collapsed .nav-expand-icon {
    display: none;
}