/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Geru Brand Colors */
    --geru-blue: #00B8FF;
    --geru-blue-dark: #0096c7;
    --geru-blue-light: #AFE2FF;
    --geru-black: #100000;
    --geru-dark-gray: #1a1a1a;
    --geru-gray: #333333;
    --geru-light-gray: #666666;
    --geru-accent: #FFD700;
    
    /* Updated Color System */
    --primary-color: var(--geru-blue);
    --primary-dark: var(--geru-blue-dark);
    --primary-light: var(--geru-blue-light);
    --secondary-color: var(--geru-accent);
    --accent-color: #ff6b35;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --bg-card: #ffffff;
    --bg-hover: #f1f3f4;
    --bg-dark: var(--geru-black);
    --bg-dark-secondary: var(--geru-dark-gray);
    
    --text-primary: var(--geru-gray);
    --text-secondary: var(--geru-light-gray);
    --text-muted: #999999;
    --text-white: #ffffff;
    --text-dark: var(--geru-black);
    
    --border-color: #e1e5e9;
    --border-light: #f0f2f5;
    --border-dark: rgba(255, 255, 255, 0.1);
    
    --success-color: #28a745;
    --warning-color: #ffc107;
    --error-color: #dc3545;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-xs: 0.25rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-geru: 0 8px 32px rgba(0, 180, 216, 0.3);
    
    /* Fonts */
    --font-family: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Inter Tight', sans-serif;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

/* Ensure all text elements use Inter Tight */
p, span, div, label, button, input, textarea, select, a, li, td, th {
    font-family: var(--font-family);
}

/* Specific UI elements */
.btn, .form-control, .modal, .toast, .navbar {
    font-family: var(--font-family);
}

/* Preserve monospace for code */
code, pre, .code {
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace !important;
}

/* Navigation */
.navbar {
    background: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xs) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    height: 32px;
    width: auto;
    filter: brightness(0) invert(1);
}

.brand-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-white);
    background: linear-gradient(135deg, var(--geru-blue), var(--geru-blue-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.08);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--geru-blue);
    object-fit: cover;
}

.user-details {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.user-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-white);
}

.user-email {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.7);
}

.logout-btn {
    background: linear-gradient(135deg, var(--error-color), #e63946);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
}

.logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 50px);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* Modern Buttons */
.btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-geru);
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--bg-tertiary), #dee2e6);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #dee2e6, #ced4da);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

/* Enhanced Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    transition: all 0.3s ease;
    background: var(--bg-card);
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.1);
    transform: translateY(-1px);
}

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

/* Enhanced Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    color: var(--text-dark);
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.close-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

/* Toast Notifications */
#toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 10001;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.toast {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    color: white;
    font-weight: 500;
    animation: toastSlideIn 0.3s ease;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

.toast.success {
    background: linear-gradient(135deg, var(--success-color), #20c997);
}

.toast.error {
    background: linear-gradient(135deg, var(--error-color), #e63946);
}

.toast.warning {
    background: linear-gradient(135deg, var(--warning-color), #ffca2c);
    color: var(--text-dark);
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-2xl);
}

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

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-sm);
        height: 44px;
    }

    .nav-menu {
        gap: var(--spacing-sm);
    }

    .user-details {
        display: none;
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .modal-content {
        margin: var(--spacing-md);
    }

    #toast-container {
        top: 50px;
        right: var(--spacing-sm);
    }

    .toast {
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .brand-text {
        font-size: 1rem;
    }

    .main-content {
        padding: var(--spacing-sm);
    }

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