/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
    /* Brand Colors */
    --tcra-blue: #0d2c4d;
    --tcra-blue-light: #1a4066;
    --tcra-blue-dark: #08213e;
    --tcra-green: #1e5a32;
    --tcra-green-light: #2d7a47;
    --tcra-gold: #fdd100;
    --tcra-gold-light: #fde047;
    
    /* Neutral Colors */
    --background: #f4f6f9;
    --surface: #ffffff;
    --surface-elevated: #fafbff;
    --text-primary: #1f2d3d;
    --text-secondary: #5a6d81;
    --text-muted: #8b9eb5;
    --border: #e4e7ed;
    --border-light: #f0f2f5;
    
    /* Status Colors */
    --success: #28a745;
    --success-light: #e6f7ff;
    --success-border: #91d5ff;
    --warning: #ffc107;
    --warning-light: #fff8e1;
    --warning-border: #ffe082;
    --error: #dc3545;
    --error-light: #f9ebea;
    --error-border: #f5b7b1;
    --info: #1f6b9c;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.2s ease-in-out;
    --transition-slow: 0.3s ease-in-out;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-full: 9999px;
}

/* ===== RESET & BASE STYLES ===== */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    font-size: var(--font-size-base);
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(13, 44, 77, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(30, 90, 50, 0.03) 0%, transparent 50%);
}

/* ===== UTILITY CLASSES ===== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

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

/* ===== HEADER STYLES ===== */
header {
    background-color: var(--surface);
    color: var(--tcra-blue);
    padding: var(--space-md) var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 3px solid var(--tcra-blue);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(8px);
}

.header-brand {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
    transition: transform var(--transition-normal);
}

.logo img:hover {
    transform: scale(1.05);
}

.header-text {
    margin-left: var(--space-lg);
}

header h1 {
    margin: 0;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--tcra-blue), var(--tcra-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    margin: 0;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===== MAIN LAYOUT ===== */
main {
    max-width: 1400px;
    margin: var(--space-xl) auto;
    padding: 0 var(--space-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-lg);
    animation: fadeIn 0.6s ease-out;
}

@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
        padding: 0 var(--space-md);
        gap: var(--space-md);
    }
}

/* ===== CARD STYLES ===== */
.tool-card {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-light);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--tcra-blue), var(--tcra-green), var(--tcra-gold));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.tool-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.tool-card:hover::before {
    opacity: 1;
}

.wide-card {
    grid-column: 1 / -1;
}

.tool-card h2 {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    margin: 0 0 var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--border);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    position: relative;
}

.tool-card h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--tcra-blue), var(--tcra-green));
    transition: width var(--transition-normal);
}

.tool-card:hover h2::after {
    width: 80px;
}

.tool-card h2 i {
    color: var(--tcra-green);
    font-size: var(--font-size-lg);
    transition: transform var(--transition-normal);
}

.tool-card:hover h2 i {
    transform: scale(1.1);
}

/* ===== FORM ELEMENTS ===== */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

input, select, textarea {
    width: 100%;
    box-sizing: border-box;
    font-family: inherit;
    font-size: var(--font-size-base);
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-md);
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    background-color: var(--surface);
    transition: all var(--transition-normal);
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--tcra-blue);
    box-shadow: 0 0 0 3px rgba(13, 44, 77, 0.1);
    transform: translateY(-1px);
}

input:hover, select:hover, textarea:hover {
    border-color: var(--tcra-blue-light);
}

input::placeholder, textarea::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.5;
}

/* ===== BUTTON STYLES ===== */
.button-group {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

button {
    background: linear-gradient(135deg, var(--tcra-blue), var(--tcra-blue-light));
    color: var(--surface);
    font-weight: 600;
    padding: var(--space-sm) var(--space-md);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: var(--font-size-base);
    position: relative;
    overflow: hidden;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
}

button::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 var(--transition-slow);
}

button:hover {
    background: linear-gradient(135deg, var(--tcra-blue-dark), var(--tcra-blue));
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

button:hover::before {
    left: 100%;
}

button:active {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

button i {
    font-size: var(--font-size-sm);
}

/* Button Variants */
.btn-secondary {
    background: linear-gradient(135deg, var(--tcra-green), var(--tcra-green-light));
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #1a4d2b, var(--tcra-green));
}

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

.btn-outline:hover {
    background: var(--tcra-blue);
    color: var(--surface);
}

/* ===== COMMUNICATIONS DASHBOARD ===== */
.comms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin: var(--space-md) 0 var(--space-lg);
}

.operator-widget {
    background: var(--surface-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.operator-widget::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border);
    transition: background var(--transition-normal);
}

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

.operator-widget h3 {
    font-size: var(--font-size-lg);
    margin: 0 0 var(--space-md);
    color: var(--text-primary);
    font-weight: 600;
}

.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
}

.status-dot {
    height: 12px;
    width: 12px;
    border-radius: var(--radius-full);
    display: inline-block;
    position: relative;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.8);
}

.status-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: var(--radius-full);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    70% { transform: translate(-50%, -50%) scale(1.4); opacity: 0; }
    100% { transform: translate(-50%, -50%) scale(1.4); opacity: 0; }
}

.status-text {
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Status States */
.ok .status-dot {
    background: var(--success);
}

.ok .status-dot::after {
    background: var(--success);
}

.ok .status-text {
    color: var(--success);
}

.ok.operator-widget::before {
    background: var(--success);
}

.degraded .status-dot {
    background: var(--warning);
}

.degraded .status-dot::after {
    background: var(--warning);
}

.degraded .status-text {
    color: var(--warning);
}

.degraded.operator-widget::before {
    background: var(--warning);
}

.outage .status-dot {
    background: var(--error);
}

.outage .status-dot::after {
    background: var(--error);
}

.outage .status-text {
    color: var(--error);
}

.outage.operator-widget::before {
    background: var(--error);
}

/* ===== RESULT AREAS ===== */
.result-area {
    margin-top: var(--space-md);
    padding: var(--space-md);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    border: 1px solid;
    position: relative;
    line-height: 1.5;
}

.result-area.ok {
    background: var(--success-light);
    color: var(--info);
    border-color: var(--success-border);
}

.result-area.error {
    background: var(--error-light);
    color: #c0392b;
    border-color: var(--error-border);
}

.result-area.warning {
    background: var(--warning-light);
    color: #8b6914;
    border-color: var(--warning-border);
}

/* ===== LOADING STATES ===== */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top: 2px solid var(--tcra-blue);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .comms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    header {
        padding: var(--space-md);
    }
    
    .header-text {
        margin-left: var(--space-md);
    }
    
    header h1 {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
        padding: var(--space-md);
    }
    
    .header-text {
        margin-left: 0;
        margin-top: var(--space-sm);
    }
    
    .comms-grid {
        grid-template-columns: 1fr;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-color-scheme: dark) {
    /* Dark mode support could be added here */
}

/* Focus indicators for keyboard navigation */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--tcra-blue);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    header {
        box-shadow: none;
        border-bottom: 2px solid var(--tcra-blue);
    }
    
    .tool-card {
        box-shadow: none;
        border: 1px solid var(--border);
        break-inside: avoid;
    }
    
    button {
        display: none;
    }
}