/* ==========================================
   Endee Design System - Global Styles v1.0
   Based on STYLE.md
   ========================================== */

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

:root {
    /* Light Theme Colors */
    --color-primary: #00A8E8;
    --color-primary-fg: #FFFFFF;
    --color-background: #FFFFFF;
    --color-card-background: #f7f8ff;
    --color-foreground: #14212B;
    --color-secondary: #F1F5F9;
    --color-secondary-fg: #14212B;
    --color-muted: #F1F5F9;
    --color-muted-fg: #64748B;
    --color-accent: #F1F5F9;
    --color-border: #E2E8F0;
    --color-destructive: #EF4444;
    --color-success: #22C55E;
    --color-warning: #F59E0B;
    --color-warning-rgb: 245, 158, 11;
    --color-code-bg: #F1F5F9;
    
    /* Gradient Colors */
    --gradient-primary-start: #14212B;
    --gradient-primary-end: #1E3A5F;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --glow-primary: 0 0 40px rgba(20, 33, 43, 0.15);
    
    /* Spacing (4px base) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-base: 16px;
    --space-lg: 20px;
    --space-xl: 24px;
    --space-2xl: 32px;
    --space-3xl: 48px;
    --space-4xl: 64px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-base: 12px;
    --radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    background: var(--color-background);
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    font-size: 16px;
    line-height: 1.625;
    color: var(--color-foreground);
    padding-top: 64px;
}

/* ==========================================
   NAVIGATION BAR - Height: 64px
   ========================================== */
.navbar {
    background: var(--color-background);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-base);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.navbar-brand {
    color: black !important;
    font-size: 20px;
    font-weight: 700;
    padding: var(--space-sm) var(--space-base);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.navbar-brand:hover {
    color: var(--color-primary) !important;
    opacity: 0.9;
}

/* Notification Button Styles */
.notification-dropdown-wrapper {
    position: relative;
}

.notification-btn {
    background: none;
    border: none;
    color: var(--color-foreground);
    font-size: 20px;
    padding: var(--space-sm) var(--space-base);
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.notification-btn:hover {
    color: var(--color-primary);
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--color-destructive);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 11px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.notification-dropdown {
    position: absolute !important;
    min-width: 350px;
    max-width: 400px;
    max-height: 500px;
    overflow-y: auto;
    padding: 0;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-base);
    margin-top: var(--space-sm);
    right: 0;
    top: 100%;
    z-index: 1000;
}

.notification-dropdown .dropdown-header {
    padding: var(--space-base);
    background: var(--color-secondary);
    border-bottom: 1px solid var(--color-border);
    border-radius: var(--radius-base) var(--radius-base) 0 0;
}

.notification-dropdown .dropdown-header h6 {
    margin: 0;
    font-weight: 600;
    color: var(--color-foreground);
    font-size: 14px;
}

.notification-item-link {
    text-decoration: none;
    display: block;
}

.notification-item-link:hover {
    text-decoration: none;
}

.notification-item {
    padding: var(--space-base);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-base);
}

.notification-item:hover {
    background: var(--color-accent);
}

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

.notification-item-content {
    flex: 1;
    min-width: 0;
}

.notification-item-arrow {
    color: var(--color-muted-fg);
    font-size: 12px;
    flex-shrink: 0;
}

.notification-item:hover .notification-item-arrow {
    color: var(--color-primary);
}

.notification-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-sm);
}

.notification-item-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--color-foreground);
    margin: 0;
}

.notification-item-meta {
    font-size: 12px;
    color: var(--color-muted-fg);
    margin: var(--space-xs) 0;
}

.notification-item-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.notification-btn-accept,
.notification-btn-reject {
    padding: 6px 12px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex: 1;
}

.notification-btn-accept {
    background: #28a745;
    color: white;
}

.notification-btn-accept:hover {
    background: #218838;
    transform: translateY(-1px);
}

.notification-btn-reject {
    background: var(--color-destructive);
    color: white;
}

.notification-btn-reject:hover {
    background: #dc3545;
    transform: translateY(-1px);
}

.notification-loading,
.notification-empty {
    padding: var(--space-2xl);
    text-align: center;
    color: var(--color-muted-fg);
}

.notification-loading i,
.notification-empty i {
    font-size: 32px;
    margin-bottom: var(--space-base);
    opacity: 0.5;
}

.notification-empty p {
    margin: 0;
    font-size: 14px;
}

.navbar-nav {
    display: flex;
    flex-direction: row;
    gap: 0;
    align-items: center;
}

.nav-link {
    color: var(--color-foreground) !important;
    padding: var(--space-sm) var(--space-base) !important;
    font-weight: 500;
    font-size: 14px;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    border-radius: var(--radius-sm);
    text-decoration: none;
}

.nav-link:hover {
    background: var(--color-accent);
    color: var(--color-primary) !important;
}

.nav-link.active {
    background: var(--color-accent);
    color: var(--color-primary) !important;
    font-weight: 600;
}

.navbar-toggler {
    border: 1px solid var(--color-border);
    color: var(--color-foreground);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2820, 33, 43, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Global Project Selector in Navbar */
.navbar-project-selector {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-left: var(--space-2xl);
    padding: var(--space-sm) var(--space-base);
    background: var(--color-secondary);
    border-radius: var(--radius-base);
    border: 1px solid var(--color-border);
}

.navbar-project-selector i {
    color: var(--color-primary);
    font-size: 18px;
}

.form-select-navbar {
    background: transparent;
    border: none;
    color: var(--color-foreground);
    font-weight: 600;
    font-size: 14px;
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    min-width: 180px;
    max-width: 250px;
    transition: color var(--transition-fast);
}

.form-select-navbar:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
    color: var(--color-primary);
}

.form-select-navbar option {
    background: var(--color-background);
    color: var(--color-foreground);
}

/* ==========================================
   SIDEBAR NAVIGATION - Width: 280px
   ========================================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 64px;
    width: 280px;
    height: calc(100vh - 64px);
    background: var(--color-background);
    border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    z-index: 999;
    overflow-y: auto;
    transition: transform var(--transition-base);
}

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

.sidebar-header h3 {
    color: var(--color-foreground);
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--color-muted-fg);
    font-size: 20px;
    cursor: pointer;
    padding: var(--space-xs);
    display: none;
    transition: color var(--transition-fast);
}

.sidebar-toggle:hover {
    color: var(--color-primary);
}

.sidebar-nav {
    padding: var(--space-lg) 0;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-item {
    margin: 0;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: var(--color-foreground);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    position: relative;
}

.sidebar-link:hover {
    background: var(--color-accent);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.sidebar-link.active {
    background: var(--color-accent);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    font-weight: 600;
}

.sidebar-link i {
    font-size: 20px;
    width: 20px;
    text-align: center;
}

.external-link-icon {
    margin-left: auto;
    font-size: 12px;
    opacity: 0.7;
}

/* Mobile Sidebar Toggle Button */
.sidebar-mobile-toggle {
    position: fixed;
    left: var(--space-lg);
    top: 80px;
    background: var(--color-primary);
    color: var(--color-primary-fg);
    border: none;
    border-radius: var(--radius-base);
    padding: var(--space-sm) var(--space-base);
    font-size: 18px;
    cursor: pointer;
    z-index: 1001;
    display: none;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
}

.sidebar-mobile-toggle:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
}

/* ==========================================
   MAIN CONTENT AREA
   ========================================== */
.main-content {
    padding: var(--space-2xl) var(--space-lg);
    min-height: calc(100vh - 64px);
    background: var(--color-background);
    transition: margin-left var(--transition-base);
}

/* ==========================================
   CARDS & CONTAINERS - Radius: 12px
   ========================================== */
.card {
    background: var(--color-background);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: box-shadow var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.page-header {
    background: var(--color-background);
    border-radius: var(--radius-base);
    padding: var(--space-2xl) var(--space-2xl);
    margin-bottom: var(--space-2xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.page-header h1 {
    color: var(--color-foreground);
    font-size: 36px;
    font-weight: 600;
    line-height: 1.3;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* ==========================================
   BUTTONS - Height: 40px, Radius: 12px
   ========================================== */
.btn-primary-custom {
    background: var(--color-primary);
    color: var(--color-primary-fg);
    border: none;
    padding: var(--space-sm) var(--space-base);
    border-radius: var(--radius-base);
    font-weight: 500;
    font-size: 14px;
    height: 40px;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.btn-primary-custom:hover {
    background: var(--color-primary);
    opacity: 0.9;
    color: var(--color-primary-fg);
}

.btn-primary-custom:active {
    opacity: 0.85;
}

.btn-secondary-custom {
    background: var(--color-secondary);
    color: var(--color-secondary-fg);
    border: none;
    padding: var(--space-sm) var(--space-base);
    border-radius: var(--radius-base);
    font-weight: 500;
    font-size: 14px;
    height: 40px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.btn-secondary-custom:hover {
    background: var(--color-secondary);
    opacity: 0.8;
    color: var(--color-secondary-fg);
}

.btn-secondary-custom:active {
    transform: scale(0.98);
}

/* ==========================================
   FORMS - Input Height: 40px
   ========================================== */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    font-weight: 500;
    color: var(--color-foreground);
    margin-bottom: var(--space-sm);
    display: block;
    font-size: 14px;
}

.form-control {
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    padding: var(--space-sm) var(--space-base);
    font-size: 14px;
    height: 40px;
    transition: all var(--transition-fast);
    background: var(--color-background);
    color: var(--color-foreground);
}

.form-control:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-color: var(--color-primary);
}

.form-control.is-invalid {
    border-color: var(--color-destructive);
}

textarea.form-control {
    height: auto;
    min-height: 80px;
    resize: vertical;
}

.invalid-feedback {
    display: block;
    color: var(--color-destructive);
    font-size: 12px;
    margin-top: var(--space-xs);
}

/* ==========================================
   ALERTS - Radius: 8px
   ========================================== */
.alert {
    border-radius: var(--radius-sm);
    padding: var(--space-base) var(--space-lg);
    margin-bottom: var(--space-lg);
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.alert-success {
    background-color: #D1FAE5;
    color: #065F46;
    border-color: #10B981;
}

.alert-danger {
    background-color: #FEE2E2;
    color: #991B1B;
    border-color: var(--color-destructive);
}

.alert-warning {
    background-color: #FEF3C7;
    color: #92400E;
    border-color: #F59E0B;
}

.alert-info {
    background-color: #DBEAFE;
    color: #1E40AF;
    border-color: #3B82F6;
}

.alert i {
    font-size: 20px;
}

/* ==========================================
   LOADING STATES
   ========================================== */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-muted);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.loading-overlay.show {
    display: flex;
}

.spinner-large {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-primary-fg);
    animation: spin 1s ease-in-out infinite;
}

/* ==========================================
   MODALS
   ========================================== */
.modal-content {
    border-radius: var(--radius-base);
    border: 1px solid var(--color-border);
}

.modal-header {
    background: linear-gradient(135deg, var(--gradient-primary-start) 0%, var(--gradient-primary-end) 100%);
    color: var(--color-primary-fg);
    border-radius: var(--radius-base) var(--radius-base) 0 0;
    padding: var(--space-lg) var(--space-2xl);
    border-bottom: none;
}

.modal-header .btn-close {
    filter: invert(1);
    opacity: 1;
}

.modal-title {
    font-weight: 600;
    font-size: 20px;
}

.modal-body {
    padding: var(--space-2xl);
}

.modal-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-lg) var(--space-2xl);
}

/* ==========================================
   BADGES
   ========================================== */
.badge {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-base);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

/* ==========================================
   TABLES
   ========================================== */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    background: var(--color-secondary);
    color: var(--color-foreground);
    font-weight: 600;
    font-size: 14px;
    padding: var(--space-md) var(--space-base);
    text-align: left;
    border-bottom: 2px solid var(--color-border);
}

.table td {
    padding: var(--space-md) var(--space-base);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-foreground);
    font-size: 14px;
}

.table tr:hover {
    background: var(--color-accent);
}

/* ==========================================
   RESPONSIVE BREAKPOINTS
   ========================================== */

/* Sidebar Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .sidebar-toggle {
        display: block;
    }

    .sidebar-mobile-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0 !important;
    }
}

/* Adjust main content when sidebar is visible */
@media (min-width: 769px) {
    .main-content.with-sidebar {
        margin-left: 280px;
    }
}

/* Mobile Responsive */
@media (max-width: 640px) {
    body {
        padding-top: 56px;
        font-size: 14px;
    }

    .navbar {
        height: 56px;
        padding: 0 var(--space-base);
    }

    .navbar-brand {
        font-size: 18px;
    }

    .navbar-nav {
        flex-direction: column;
        gap: 0;
    }

    .nav-link {
        padding: var(--space-md) var(--space-lg) !important;
    }

    .main-content {
        padding: var(--space-lg) var(--space-base);
    }

    .page-header {
        padding: var(--space-lg) var(--space-lg);
    }

    .page-header h1 {
        font-size: 28px;
    }

    .navbar-project-selector {
        margin-left: 0;
        margin-top: var(--space-sm);
        margin-bottom: var(--space-sm);
        width: 100%;
    }

    .form-select-navbar {
        min-width: auto;
        max-width: 100%;
        flex: 1;
    }

    .sidebar {
        top: 56px;
        height: calc(100vh - 56px);
    }

    .modal-body {
        padding: var(--space-lg);
    }

    .modal-footer {
        padding: var(--space-base) var(--space-lg);
    }

    .notification-dropdown {
        position: absolute !important;
        right: 0 !important;
        left: auto !important;
        min-width: 300px;
        max-width: calc(100vw - 32px);
    }
}

/* Tablet Responsive */
@media (min-width: 641px) and (max-width: 1024px) {
    .page-header h1 {
        font-size: 32px;
    }
}