/* =============================================================================
   GCC Admin Core CSS Framework
   Foundation styles, design tokens, and utilities for admin interface
   ============================================================================= */

/* ===== CSS CUSTOM PROPERTIES (DESIGN TOKENS) ===== */
:root {
    /* Brand Colors - GCC Primary Palette */
    --gcc-green-primary: #447638;
    --gcc-green-secondary: #92C83E;
    --gcc-green-light: #e8f5e1;
    --gcc-green-dark: #2d4f25;

    --gcc-blue-primary: #00AEEF;
    --gcc-blue-dark: #002B76;
    --gcc-blue-light: #e6f7ff;
    --gcc-blue-secondary: #0095d8;

    /* Admin UI Color System */
    --admin-primary: var(--gcc-green-secondary);
    --admin-primary-hover: var(--gcc-green-primary);
    --admin-primary-light: var(--gcc-green-light);

    --admin-success: var(--gcc-green-secondary);
    --admin-success-light: var(--gcc-green-light);
    --admin-success-dark: var(--gcc-green-dark);

    --admin-warning: #ffc107;
    --admin-warning-light: #fff8e1;
    --admin-warning-dark: #ffa000;

    --admin-danger: #ff5252;
    --admin-danger-light: #ffebee;
    --admin-danger-dark: #d32f2f;

    --admin-info: var(--gcc-blue-dark);
    --admin-info-light: var(--gcc-blue-light);
    --admin-info-dark: #001a4d;

    /* Background Colors */
    --admin-bg-primary: #ffffff;
    --admin-bg-secondary: #f9f9f9;
    --admin-bg-accent: #f5f7fa;
    --admin-bg-muted: #f0f2f5;
    --admin-bg-dark: #2c3e50;

    /* Border Colors */
    --admin-border-primary: #ddd;
    --admin-border-secondary: #eee;
    --admin-border-light: #f0f0f0;
    --admin-border-dark: #ccc;
    --admin-border-focus: var(--admin-primary);

    /* Text Colors */
    --admin-text-primary: #333;
    --admin-text-secondary: #666;
    --admin-text-muted: #999;
    --admin-text-light: #bbb;
    --admin-text-inverse: #ffffff;
    --admin-text-link: var(--admin-primary);
    --admin-text-link-hover: var(--admin-primary-hover);

    /* Spacing Scale (8px base unit) */
    --admin-space-xs: 4px;
    --admin-space-sm: 8px;
    --admin-space-md: 16px;
    --admin-space-lg: 24px;
    --admin-space-xl: 32px;
    --admin-space-2xl: 48px;
    --admin-space-3xl: 64px;

    /* Typography Scale */
    --admin-font-family-primary: 'Century Gothic', CenturyGothic, AppleGothic, sans-serif;
    --admin-font-family-mono: 'Consolas', 'Monaco', 'Courier New', monospace;

    --admin-font-size-xs: 12px;
    --admin-font-size-sm: 14px;
    --admin-font-size-base: 16px;
    --admin-font-size-lg: 18px;
    --admin-font-size-xl: 20px;
    --admin-font-size-2xl: 24px;
    --admin-font-size-3xl: 32px;

    --admin-font-weight-light: 300;
    --admin-font-weight-normal: 400;
    --admin-font-weight-medium: 500;
    --admin-font-weight-semibold: 600;
    --admin-font-weight-bold: 700;

    --admin-line-height-tight: 1.2;
    --admin-line-height-normal: 1.5;
    --admin-line-height-relaxed: 1.7;

    /* Border Radius */
    --admin-radius-xs: 2px;
    --admin-radius-sm: 4px;
    --admin-radius-md: 6px;
    --admin-radius-lg: 8px;
    --admin-radius-xl: 12px;
    --admin-radius-full: 50%;

    /* Shadows */
    --admin-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --admin-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --admin-shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --admin-shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    --admin-shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.25);
    --admin-shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --admin-transition-fast: 0.15s ease;
    --admin-transition-normal: 0.3s ease;
    --admin-transition-slow: 0.5s ease;

    /* Z-Index Scale */
    --admin-z-dropdown: 1000;
    --admin-z-sticky: 1020;
    --admin-z-fixed: 1030;
    --admin-z-modal-backdrop: 1040;
    --admin-z-modal: 1050;
    --admin-z-popover: 1060;
    --admin-z-tooltip: 1070;
    --admin-z-toast: 10000; /* Must be higher than modal backdrop (9998) and modal content (9999) */

    /* Layout */
    --admin-container-max-width: 1800px;
    --admin-sidebar-width: 280px;
    --admin-header-height: 64px;

    /* Responsive Breakpoints */
    --admin-breakpoint-sm: 576px;
    --admin-breakpoint-md: 768px;
    --admin-breakpoint-lg: 1024px;
    --admin-breakpoint-xl: 1200px;
    --admin-breakpoint-2xl: 1400px;
}

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

/* Admin body class for admin pages */
.admin-body {
    font-family: var(--admin-font-family-primary);
    font-size: var(--admin-font-size-base);
    line-height: var(--admin-line-height-normal);
    color: var(--admin-text-primary);
    background-color: var(--admin-bg-secondary);
    margin: 0;
    padding: 0;
}

/* ===== TYPOGRAPHY ===== */
.admin-h1, .admin-h2, .admin-h3, .admin-h4, .admin-h5, .admin-h6 {
    font-family: var(--admin-font-family-primary);
    font-weight: var(--admin-font-weight-semibold);
    line-height: var(--admin-line-height-tight);
    color: var(--admin-text-primary);
    margin: 0 0 var(--admin-space-md) 0;
}

.admin-h1 { font-size: var(--admin-font-size-3xl); }
.admin-h2 { font-size: var(--admin-font-size-2xl); }
.admin-h3 { font-size: var(--admin-font-size-xl); }
.admin-h4 { font-size: var(--admin-font-size-lg); }
.admin-h5 { font-size: var(--admin-font-size-base); }
.admin-h6 { font-size: var(--admin-font-size-sm); }

.admin-text-xs { font-size: var(--admin-font-size-xs); }
.admin-text-sm { font-size: var(--admin-font-size-sm); }
.admin-text-base { font-size: var(--admin-font-size-base); }
.admin-text-lg { font-size: var(--admin-font-size-lg); }
.admin-text-xl { font-size: var(--admin-font-size-xl); }

.admin-text-light { font-weight: var(--admin-font-weight-light); }
.admin-text-normal { font-weight: var(--admin-font-weight-normal); }
.admin-text-medium { font-weight: var(--admin-font-weight-medium); }
.admin-text-semibold { font-weight: var(--admin-font-weight-semibold); }
.admin-text-bold { font-weight: var(--admin-font-weight-bold); }

.admin-text-primary { color: var(--admin-text-primary); }
.admin-text-secondary { color: var(--admin-text-secondary); }
.admin-text-muted { color: var(--admin-text-muted); }
.admin-text-success { color: var(--admin-success); }
.admin-text-warning { color: var(--admin-warning); }
.admin-text-danger { color: var(--admin-danger); }
.admin-text-info { color: var(--admin-info); }

/* ===== UTILITY CLASSES ===== */

/* Spacing Utilities */
.admin-m-0 { margin: 0; }
.admin-m-xs { margin: var(--admin-space-xs); }
.admin-m-sm { margin: var(--admin-space-sm); }
.admin-m-md { margin: var(--admin-space-md); }
.admin-m-lg { margin: var(--admin-space-lg); }
.admin-m-xl { margin: var(--admin-space-xl); }

.admin-mt-0 { margin-top: 0; }
.admin-mt-xs { margin-top: var(--admin-space-xs); }
.admin-mt-sm { margin-top: var(--admin-space-sm); }
.admin-mt-md { margin-top: var(--admin-space-md); }
.admin-mt-lg { margin-top: var(--admin-space-lg); }
.admin-mt-xl { margin-top: var(--admin-space-xl); }

.admin-mb-0 { margin-bottom: 0; }
.admin-mb-xs { margin-bottom: var(--admin-space-xs); }
.admin-mb-sm { margin-bottom: var(--admin-space-sm); }
.admin-mb-md { margin-bottom: var(--admin-space-md); }
.admin-mb-lg { margin-bottom: var(--admin-space-lg); }
.admin-mb-xl { margin-bottom: var(--admin-space-xl); }

.admin-p-0 { padding: 0; }
.admin-p-xs { padding: var(--admin-space-xs); }
.admin-p-sm { padding: var(--admin-space-sm); }
.admin-p-md { padding: var(--admin-space-md); }
.admin-p-lg { padding: var(--admin-space-lg); }
.admin-p-xl { padding: var(--admin-space-xl); }

/* Background Utilities */
.admin-bg-primary { background-color: var(--admin-bg-primary); }
.admin-bg-secondary { background-color: var(--admin-bg-secondary); }
.admin-bg-accent { background-color: var(--admin-bg-accent); }
.admin-bg-success { background-color: var(--admin-success-light); }
.admin-bg-warning { background-color: var(--admin-warning-light); }
.admin-bg-danger { background-color: var(--admin-danger-light); }
.admin-bg-info { background-color: var(--admin-info-light); }

/* Border Utilities */
.admin-border { border: 1px solid var(--admin-border-primary); }
.admin-border-0 { border: none; }
.admin-border-top { border-top: 1px solid var(--admin-border-primary); }
.admin-border-bottom { border-bottom: 1px solid var(--admin-border-primary); }
.admin-border-left { border-left: 1px solid var(--admin-border-primary); }
.admin-border-right { border-right: 1px solid var(--admin-border-primary); }

.admin-rounded { border-radius: var(--admin-radius-md); }
.admin-rounded-sm { border-radius: var(--admin-radius-sm); }
.admin-rounded-lg { border-radius: var(--admin-radius-lg); }
.admin-rounded-full { border-radius: var(--admin-radius-full); }

/* Shadow Utilities */
.admin-shadow { box-shadow: var(--admin-shadow-md); }
.admin-shadow-sm { box-shadow: var(--admin-shadow-sm); }
.admin-shadow-lg { box-shadow: var(--admin-shadow-lg); }
.admin-shadow-none { box-shadow: none; }

/* Display Utilities */
.admin-block { display: block; }
.admin-inline { display: inline; }
.admin-inline-block { display: inline-block; }
.admin-flex { display: flex; }
.admin-inline-flex { display: inline-flex; }
.admin-grid { display: grid; }
.admin-hidden { display: none; }

/* Flexbox Utilities */
.admin-flex-row { flex-direction: row; }
.admin-flex-col { flex-direction: column; }
.admin-flex-wrap { flex-wrap: wrap; }
.admin-flex-nowrap { flex-wrap: nowrap; }
.admin-flex-1 { flex: 1; }
.admin-flex-auto { flex: auto; }
.admin-flex-none { flex: none; }

.admin-justify-start { justify-content: flex-start; }
.admin-justify-end { justify-content: flex-end; }
.admin-justify-center { justify-content: center; }
.admin-justify-between { justify-content: space-between; }
.admin-justify-around { justify-content: space-around; }

.admin-items-start { align-items: flex-start; }
.admin-items-end { align-items: flex-end; }
.admin-items-center { align-items: center; }
.admin-items-baseline { align-items: baseline; }
.admin-items-stretch { align-items: stretch; }

/* Text Alignment */
.admin-text-left { text-align: left; }
.admin-text-center { text-align: center; }
.admin-text-right { text-align: right; }

/* Position Utilities */
.admin-relative { position: relative; }
.admin-absolute { position: absolute; }
.admin-fixed { position: fixed; }
.admin-sticky { position: sticky; }

/* Width/Height Utilities */
.admin-w-full { width: 100%; }
.admin-w-auto { width: auto; }
.admin-h-full { height: 100%; }
.admin-h-auto { height: auto; }

/* Overflow Utilities */
.admin-overflow-hidden { overflow: hidden; }
.admin-overflow-auto { overflow: auto; }
.admin-overflow-x-auto { overflow-x: auto; }
.admin-overflow-y-auto { overflow-y: auto; }

/* ===== SCREEN READER UTILITIES ===== */
.admin-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;
}

.admin-not-sr-only {
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* ===== FOCUS STATES ===== */
.admin-focus-outline:focus {
    outline: 2px solid var(--admin-primary);
    outline-offset: 2px;
}

.admin-focus-ring:focus {
    box-shadow: 0 0 0 3px rgba(0, 174, 239, 0.15);
    outline: none;
}

/* ===== RESPONSIVE UTILITIES ===== */
@media (max-width: 767px) {
    .admin-hidden-mobile { display: none !important; }
    .admin-block-mobile { display: block !important; }
    .admin-flex-mobile { display: flex !important; }
    .admin-grid-mobile { display: grid !important; }
}

@media (min-width: 768px) {
    .admin-hidden-tablet { display: none !important; }
    .admin-block-tablet { display: block !important; }
    .admin-flex-tablet { display: flex !important; }
    .admin-grid-tablet { display: grid !important; }
}

@media (min-width: 1024px) {
    .admin-hidden-desktop { display: none !important; }
    .admin-block-desktop { display: block !important; }
    .admin-flex-desktop { display: flex !important; }
    .admin-grid-desktop { display: grid !important; }
}

/* ===== PRINT STYLES ===== */
@media print {
    .admin-no-print { display: none !important; }

    .admin-container {
        max-width: none !important;
        padding: 0 !important;
    }

    .admin-shadow,
    .admin-shadow-sm,
    .admin-shadow-lg {
        box-shadow: none !important;
    }
}

/* ===== MODAL SYSTEM ===== */
.admin-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.85); /* US-015: 85% black opacity */
    backdrop-filter: blur(3px); /* US-015: 3px blur effect */
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--admin-z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--admin-transition-normal),
                visibility var(--admin-transition-normal);
}

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

.admin-modal-dialog {
    background: var(--admin-bg-primary);
    border-radius: var(--admin-radius-lg);
    box-shadow: var(--admin-shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    z-index: var(--admin-z-modal);
    transform: scale(0.9) translateY(-20px);
    opacity: 0;
    transition: transform var(--admin-transition-normal),
                opacity var(--admin-transition-normal);
}

.admin-modal-overlay.show .admin-modal-dialog {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.admin-modal-header {
    padding: var(--admin-space-lg);
    border-bottom: 1px solid var(--admin-border-secondary);
}

.admin-modal-title {
    font-size: var(--admin-font-size-xl);
    font-weight: var(--admin-font-weight-semibold);
    color: var(--admin-text-primary);
    margin: 0;
}

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

.admin-modal-message {
    font-size: var(--admin-font-size-base);
    color: var(--admin-text-secondary);
    line-height: var(--admin-line-height-relaxed);
    margin: 0;
}

.admin-modal-footer {
    padding: var(--admin-space-lg);
    border-top: 1px solid var(--admin-border-secondary);
    display: flex;
    gap: var(--admin-space-md);
    justify-content: flex-end;
}

.admin-modal-footer.admin-modal-footer--centered {
    justify-content: center;
}

/* Modal Buttons */
.admin-modal-btn {
    padding: 12px 24px;
    font-size: var(--admin-font-size-base);
    font-weight: var(--admin-font-weight-medium);
    border-radius: var(--admin-radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--admin-transition-fast);
    min-width: 100px;
    font-family: var(--admin-font-family-primary);
}

.admin-modal-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--admin-shadow-sm);
}

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

.admin-modal-btn:focus {
    outline: 2px solid var(--admin-primary);
    outline-offset: 2px;
}

.admin-modal-btn--danger {
    background-color: var(--admin-danger);
    color: var(--admin-text-inverse);
}

.admin-modal-btn--danger:hover {
    background-color: var(--admin-danger-dark);
}

.admin-modal-btn--success {
    background-color: var(--admin-success);
    color: var(--admin-text-inverse);
}

.admin-modal-btn--success:hover {
    background-color: var(--admin-success-dark);
}

.admin-modal-btn--primary {
    background-color: var(--admin-primary);
    color: var(--admin-text-inverse);
}

.admin-modal-btn--primary:hover {
    background-color: var(--admin-primary-hover);
}

.admin-modal-btn--secondary {
    background-color: var(--admin-bg-accent);
    color: var(--admin-text-primary);
    border: 1px solid var(--admin-border-primary);
}

.admin-modal-btn--secondary:hover {
    background-color: var(--admin-bg-muted);
}

.admin-modal-btn--full {
    width: 100%;
}

/* Progress Bar in Modals */
.admin-modal-progress {
    margin: var(--admin-space-md) 0;
}

.admin-modal-progress-bar {
    background-color: var(--admin-bg-muted);
    height: 8px;
    border-radius: var(--admin-radius-sm);
    overflow: hidden;
    position: relative;
}

.admin-modal-progress-fill {
    background-color: var(--admin-success);
    height: 100%;
    border-radius: var(--admin-radius-sm);
    transition: width var(--admin-transition-normal);
    position: relative;
    overflow: hidden;
}

.admin-modal-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, 0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.2) 50%,
        rgba(255, 255, 255, 0.2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 50px 50px;
    animation: admin-progress-stripes 1s linear infinite;
}

@keyframes admin-progress-stripes {
    0% { background-position: 0 0; }
    100% { background-position: 50px 50px; }
}

.admin-modal-progress-text {
    font-size: var(--admin-font-size-sm);
    color: var(--admin-text-secondary);
    margin-top: var(--admin-space-sm);
    text-align: center;
}

/* Indeterminate Progress (for unknown durations) */
.admin-modal-progress-fill.indeterminate {
    width: 100% !important;
    background: linear-gradient(
        90deg,
        var(--admin-bg-muted) 0%,
        var(--admin-success) 50%,
        var(--admin-bg-muted) 100%
    );
    background-size: 200% 100%;
    animation: admin-progress-indeterminate 1.5s ease-in-out infinite;
}

@keyframes admin-progress-indeterminate {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Mobile Responsive Modals */
@media (max-width: 767px) {
    .admin-modal-dialog {
        width: 95%;
        margin: var(--admin-space-md);
    }

    .admin-modal-header,
    .admin-modal-body,
    .admin-modal-footer {
        padding: var(--admin-space-md);
    }

    .admin-modal-footer {
        flex-direction: column-reverse;
    }

    .admin-modal-btn {
        width: 100%;
    }

    .admin-modal-title {
        font-size: var(--admin-font-size-lg);
    }
}

/* Accessibility - Reduce Motion */
@media (prefers-reduced-motion: reduce) {
    .admin-modal-overlay,
    .admin-modal-dialog,
    .admin-modal-btn,
    .admin-modal-progress-fill {
        transition: none;
        animation: none;
    }

    .admin-modal-progress-fill::after {
        display: none;
    }
}