:root {
    /* Font Family */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

    /* Brand Colors - Sophisticated Blue */
    --color-primary: #3b82f6; 
    --color-primary-hover: #2563eb;
    --color-primary-light: rgba(59, 130, 246, 0.1);
    
    /* Dark Mode Palette (Deep Tech) */
    --color-bg-main: #0b0f1a;
    --color-bg-card: #151b2d;
    --color-bg-sidebar: #0f172a;
    --color-bg-input: #1e293b;
    --color-border: #2d3748;
    --color-card-shadow: rgba(0, 0, 0, 0.4);
    
    /* Text Colors */
    --color-text-main: #f1f5f9;
    --color-text-muted: #94a3b8;
    
    /* Status Colors - Optimized for OLT Monitoring */
    --color-success: #10b981; /* Online / Normal */
    --color-error: #f43f5e;   /* Offline / Critical */
    --color-warning: #f59e0b; /* Warning / Alarm */
    --color-info: #0ea5e9;    /* System Info */
    
    /* Radius & Spacing */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition-speed: 0.2s;
    --modal-transition: 0.3s;
}

/* Modal Animations */
:root {
    --modal-transition: 0.3s;
}

.modal-overlay {
    transition: opacity var(--modal-transition) ease-out;
    opacity: 0;
    visibility: hidden;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    transition: transform var(--modal-transition) cubic-bezier(0.34, 1.56, 0.64, 1), opacity var(--modal-transition) ease-out;
    transform: scale(0.95) translateY(-10px);
    opacity: 0;
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

/* Closing state */
.modal-overlay.modal-closing {
    opacity: 0;
    pointer-events: none;
    visibility: visible; /* Keep it visible during opacity transition */
}

.modal-overlay.modal-closing .modal-content {
    transform: scale(0.95) translateY(10px);
    opacity: 0;
}

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

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

.animate-spin-slow {
    animation: spin 2s linear infinite;
}

[data-theme='light'] {
    /* Light Mode Palette (Clean Enterprise) */
    --color-bg-main: #f1f5f9;
    --color-bg-card: #ffffff;
    --color-bg-sidebar: #ffffff;
    --color-bg-input: #f8fafc;
    --color-border: #e2e8f0;
    --color-card-shadow: rgba(0, 0, 0, 0.05);
    
    /* Text Colors */
    --color-text-main: #0f172a;
    --color-text-muted: #64748b;

    /* Refined Light Status Colors */
    --color-success: #059669;
    --color-error: #e11d48;
    --color-warning: #d97706;
    --color-info: #0284c7;
}

/* Base Styles */
body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-main) !important;
    color: var(--color-text-main) !important;
    -webkit-font-smoothing: antialiased;
}

/* Modern Card Style */
.card-hover {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 6px -1px var(--color-card-shadow);
    transition: all var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px var(--color-card-shadow);
    border-color: var(--color-primary);
}

/* Professional Sidebar */
.sidebar { 
    transition: all var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
    background-color: var(--color-bg-sidebar) !important;
    border-right: 1px solid var(--color-border) !important;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.2);
}

.nav-link {
    border-radius: 12px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 6px;
    font-weight: 500;
    border: 1px solid transparent;
}

.nav-link:hover {
    background-color: var(--color-bg-input) !important;
    color: var(--color-primary) !important;
    transform: translateX(4px);
    border-color: var(--color-border);
}

.nav-link.active {
    background-color: var(--color-primary) !important;
    color: white !important;
    box-shadow: 0 8px 20px -4px rgba(59, 130, 246, 0.4);
    transform: translateX(4px);
}

.nav-link i {
    transition: transform 0.2s ease;
}

.nav-link:hover i {
    transform: scale(1.1);
}

/* Status Indicator Pulse */
.status-pulse {
    position: relative;
    display: inline-flex;
}

.status-pulse::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    opacity: 0.5;
}

.status-pulse.online::after { background-color: var(--color-success); }
.status-pulse.offline::after { background-color: var(--color-error); }

[data-theme='light'] .status-pulse::after { opacity: 0.3; }

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.5; }
    70% { transform: scale(2.5); opacity: 0; }
    100% { transform: scale(1); opacity: 0; }
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-main);
}

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

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

/* Transition for Theme Switching */
* {
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.hidden {
    display: none !important;
}

/* Theme Icon Toggle Logic */
[data-theme="dark"] .theme-icon-light {
    display: none !important;
}
[data-theme="light"] .theme-icon-dark {
    display: none !important;
}

/* Component Styles */
.disabled {
    opacity: 0.6;
    pointer-events: none;
}

/* Theme Utility Classes */
.bg-theme-main { background-color: var(--color-bg-main) !important; }
.bg-theme-card { background-color: var(--color-bg-card) !important; }
.bg-theme-input { background-color: var(--color-bg-input) !important; }
.bg-theme-sidebar { background-color: var(--color-bg-sidebar) !important; }
.bg-theme-primary { background-color: var(--color-primary) !important; }
.bg-theme-success { background-color: var(--color-success) !important; }
.bg-theme-error { background-color: var(--color-error) !important; }
.bg-theme-warning { background-color: var(--color-warning) !important; }
.bg-theme-info { background-color: var(--color-info) !important; }

.border-theme-border { border-color: var(--color-border) !important; }
.border-theme-primary { border-color: var(--color-primary) !important; }

.text-theme-main { color: var(--color-text-main) !important; }
.text-theme-muted { color: var(--color-text-muted) !important; }
.text-theme-primary { color: var(--color-primary) !important; }
.text-theme-success { color: var(--color-success) !important; }
.text-theme-error { color: var(--color-error) !important; }
.text-theme-warning { color: var(--color-warning) !important; }
.text-theme-info { color: var(--color-info) !important; }

.bg-theme-success-light { background-color: rgba(16, 185, 129, 0.1) !important; }
.bg-theme-error-light { background-color: rgba(244, 63, 94, 0.1) !important; }
.bg-theme-warning-light { background-color: rgba(245, 158, 11, 0.1) !important; }
.bg-theme-info-light { background-color: rgba(14, 165, 233, 0.1) !important; }

[data-theme='light'] .bg-theme-success-light { background-color: rgba(5, 150, 105, 0.1) !important; }
[data-theme='light'] .bg-theme-error-light { background-color: rgba(225, 29, 72, 0.1) !important; }
[data-theme='light'] .bg-theme-warning-light { background-color: rgba(217, 119, 6, 0.1) !important; }
[data-theme='light'] .bg-theme-info-light { background-color: rgba(2, 132, 199, 0.1) !important; }

/* Force Overrides for Tailwind and Generic Classes */
.bg-gray-950 { background-color: #05070a !important; }
.bg-gray-900 { background-color: var(--color-bg-main) !important; }
.bg-gray-800 { background-color: var(--color-bg-card) !important; }
.bg-gray-700 { background-color: var(--color-bg-input) !important; }
.bg-slate-900 { background-color: var(--color-bg-main) !important; }
.bg-slate-800 { background-color: var(--color-bg-card) !important; }
.border-gray-700, .border-gray-600, .border-gray-800, .border-slate-700 { border-color: var(--color-border) !important; }
.text-white { color: var(--color-text-main) !important; }
.text-gray-100, .text-slate-100 { color: var(--color-text-main) !important; }
.text-gray-300, .text-gray-400, .text-gray-500, .text-slate-400 { color: var(--color-text-muted) !important; }
.bg-blue-600, .bg-blue-500 { background-color: var(--color-primary) !important; }
.hover\:bg-blue-700:hover, .hover\:bg-blue-600:hover { background-color: var(--color-primary-hover) !important; }
.text-blue-500, .text-blue-400 { color: var(--color-primary) !important; }
.bg-green-600, .bg-emerald-600 { background-color: var(--color-success) !important; }
.bg-red-600, .bg-rose-600 { background-color: var(--color-error) !important; }
.bg-yellow-600, .bg-amber-600 { background-color: var(--color-warning) !important; }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg-main); }
::-webkit-scrollbar-thumb { 
    background: var(--color-border); 
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* Status Indicators */
.status-online {
    position: relative;
}
.status-online::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 9999px;
    background: var(--color-success);
    opacity: 0.4;
    animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes ping {
    75%, 100% { transform: scale(2); opacity: 0; }
}
.sidebar-open { transform: translateX(0); }
.sidebar-closed { transform: translateX(-100%); }
.card-hover:hover { transform: translateY(-2px); box-shadow: 0 10px 40px rgba(0,0,0,0.15); }
.table-scroll { overflow-x: auto; }
.table-scroll::-webkit-scrollbar {
    height: 4px;
}
.table-scroll::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 10px;
}
.loader { 
    border: 3px solid var(--color-bg-input); 
    border-top: 3px solid var(--color-primary); 
    border-radius: 50%; 
    width: 20px; 
    height: 20px; 
    animation: spin 1s linear infinite; 
}
/* Pro Spinner Animations */
@keyframes pro-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.pro-spinner-ring {
    border-top-color: #3b82f6 !important;
    animation: pro-spin 0.8s linear infinite !important;
}

.pro-spinner-pulse {
    animation: pulse 1s cubic-bezier(0.4, 0, 0.6, 1) infinite !important;
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
@keyframes loading {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(0); }
    100% { transform: translateX(100%); }
}

/* Custom styles for floating actions */
#floatingActions {
    transition: opacity 0.2s ease, transform 0.1s ease;
    will-change: left, top, opacity;
}

#floatingActions > div {
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

/* Toastr Customization */
#toast-container > .toast {
    font-size: 13px !important;
    padding-top: 10px !important;
    padding-bottom: 10px !important;
    min-height: auto !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
    position: relative;
    opacity: 0;
    transform: translateX(-100%);
    transition: transform 0.2s cubic-bezier(0, 0, 0.2, 1), opacity 0.2s linear;
}

#toast-container > .toast.visible {
    opacity: 1 !important;
    transform: translateX(0) !important;
}

/* Fallback for Toastr's internal showing */
.toast {
    animation: toast-slide-in 0.2s cubic-bezier(0, 0, 0.2, 1) forwards;
}

@keyframes toast-slide-in {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Target specifically when Toastr is hiding */
#toast-container > .toast[style*="display: none"],
#toast-container > .toast.toast-hiding {
    animation: toast-slide-out 0.15s cubic-bezier(0.4, 0, 1, 1) forwards !important;
    display: block !important; /* Force display during animation */
}

@keyframes toast-slide-out {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(-100%); opacity: 0; }
}

#toast-container.toast-top-left {
    top: 20px !important;
    left: 20px !important;
}

.table-scroll {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.toast-message {
    font-size: 13px !important;
}

[data-theme='light'] #floatingActions > div {
    background-color: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 0, 0, 0.1);
}

@keyframes loading {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Mobile adjustment */
@media (max-width: 1023px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.active { transform: translateX(0); }
    
    /* Ensure main content doesn't have margin on mobile */
    .lg\:ml-64 {
        margin-left: 0 !important;
    }
}
@media (max-width: 640px) {
    table {
        font-size: 0.75rem; /* text-xs */
    }
    th, td {
        padding-left: 0.5rem !important;
        padding-right: 0.5rem !important;
    }
}

/* Sidebar Overlay */
.sidebar-overlay {
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* Sidebar & Layout Fixes */
.lg\:pl-64 {
    padding-left: 16rem; /* 64 * 0.25rem */
}

@media (max-width: 1023px) {
    .lg\:pl-64 {
        padding-left: 0 !important;
    }
}

/* Section Fade Animation */
.section {
    display: none;
    opacity: 0;
    width: 100%;
}

.section.active {
    display: block;
    animation: fadeIn 0.5s ease forwards;
}

/* Loading Overlay */
#loadingOverlay {
    transition: opacity var(--modal-transition) ease-out, visibility var(--modal-transition) linear;
    opacity: 0;
    visibility: hidden;
    display: flex !important; /* Always flex but hidden via visibility/opacity */
}

#loadingOverlay.active {
    opacity: 1;
    visibility: visible;
}

#loadingOverlay > div {
    transition: transform var(--modal-transition) cubic-bezier(0.34, 1.56, 0.64, 1), opacity var(--modal-transition) ease-out;
    transform: scale(0.95) translateY(-10px);
    opacity: 0;
}

#loadingOverlay.active > div {
    transform: scale(1) translateY(0);
    opacity: 1;
}

#loadingOverlay.modal-closing {
    opacity: 0;
    visibility: visible;
}

#loadingOverlay.modal-closing > div {
    transform: scale(0.95) translateY(10px);
    opacity: 0;
}

/* Modal Overlay fix to be truly global */
.modal-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 9999 !important;
    background-color: rgba(0, 0, 0, 0.7) !important;
    backdrop-filter: blur(4px) !important;
}

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