/* ===== CSS Variables - HydroBlue ISO Theme ===== */
:root {
    /* Color Palette - HydroBlue ISO */
    --primary-blue: #0b61ff;
    --primary-blue-dark: #084fd8;
    --dark-navy: #072035;
    --dark-text: #07122a;
    --medium-blue: #1e3a8a;
    --light-blue-bg: #f4f7fb;
    --light-blue-border: #e6eef9;
    --light-blue-subtle: #eef2ff;
    --white: #ffffff;
    --off-white: #fbfdff;
    --slate-gray: #475569;
    --light-gray: #64748b;
    --border-gray: #f1f5f9;
    --success-green: #065f46;
    --success-bg: #ecffef;
    --warning-orange: #f97316;
    --warning-bg: #fffbeb;
    --error-red: #ef4444;
    --error-bg: #fef2f2;
    
    /* Shadow */
    --shadow-light: 0 8px 20px rgba(12, 22, 42, 0.04);
    --shadow-medium: 0 4px 12px rgba(12, 22, 42, 0.08);
    --shadow-large: 0 10px 30px rgba(12, 22, 42, 0.12);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 32px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 12px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-index layers */
    --z-sidebar: 100;
    --z-header: 200;
    --z-modal: 1000;
    --z-tooltip: 1100;
    
    /* Layout */
    --sidebar-width: 260px;
    --header-height: 60px;
    --footer-height: 48px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background-color: var(--light-blue-bg);
    color: var(--dark-text);
    line-height: 1.5;
    overflow-x: hidden;
    font-size: 13px;
}

/* ===== App Container ===== */
.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* ===== Sidebar Styles - HydroBlue ISO ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--white);
    border-right: 1px solid var(--light-blue-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: var(--z-sidebar);
    transition: transform var(--transition-normal);
    box-shadow: 2px 0 10px var(--shadow-light);
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--light-blue-border);
    background-color: var(--off-white);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.logo-icon {
    font-size: 20px;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue), #3b82f6);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(11, 97, 255, 0.15);
}

.logo-text h1 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark-navy);
    margin-bottom: 2px;
    letter-spacing: -0.2px;
}

.logo-subtitle {
    font-size: 11px;
    color: var(--slate-gray);
    font-weight: 500;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.system-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: var(--light-gray);
    padding-top: var(--spacing-sm);
    border-top: 1px dashed var(--light-blue-border);
}

.version {
    background: var(--light-blue-subtle);
    color: var(--primary-blue);
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 600;
    border: 1px solid var(--light-blue-border);
}

.last-saved {
    font-style: italic;
}

/* Navigation Tree */
.nav-tree {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.nav-item {
    position: relative;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

.nav-content {
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-left: 3px solid transparent;
    min-height: 36px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    color: var(--dark-text);
}

.nav-item:hover > .nav-content {
    background-color: var(--light-blue-subtle);
    border-left-color: var(--primary-blue);
    color: var(--primary-blue);
}

.nav-item.active > .nav-content {
    background-color: var(--light-blue-subtle);
    border-left-color: var(--primary-blue);
    color: var(--primary-blue);
    font-weight: 600;
}

.nav-item.level-0 > .nav-content {
    font-weight: 600;
    font-size: 13px;
    background-color: var(--off-white);
}

.nav-item.level-1 > .nav-content {
    padding-left: calc(var(--spacing-md) + 20px);
    font-size: 12px;
}

.nav-item.level-2 > .nav-content {
    padding-left: calc(var(--spacing-md) + 36px);
    font-size: 12px;
    color: var(--slate-gray);
}

.nav-item.level-3 > .nav-content {
    padding-left: calc(var(--spacing-md) + 52px);
    font-size: 11px;
    color: var(--light-gray);
}

.nav-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 10px;
    flex-shrink: 0;
}

.level-0 .nav-icon {
    background-color: var(--primary-blue);
    color: white;
}

.level-1 .nav-icon {
    background-color: #3b82f6;
    color: white;
}

.level-2 .nav-icon {
    background-color: #60a5fa;
    color: var(--dark-navy);
}

.level-3 .nav-icon {
    background-color: var(--light-blue-border);
    color: var(--slate-gray);
}

.expand-icon {
    margin-left: auto;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background-color: var(--light-blue-border);
    color: var(--primary-blue);
    transition: all var(--transition-fast);
    font-size: 10px;
    flex-shrink: 0;
}

.nav-children {
    display: none;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--light-blue-border);
    background-color: var(--off-white);
}

.sidebar-footer .btn {
    width: 100%;
    margin-bottom: var(--spacing-sm);
    background: var(--white);
    color: var(--dark-navy);
    border: 1px solid var(--light-blue-border);
}

.sidebar-footer .btn:hover {
    background: var(--light-blue-subtle);
    border-color: var(--primary-blue);
}

.user-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--white);
    border-radius: var(--radius-md);
    border: 1px solid var(--light-blue-border);
}

.user-avatar {
    width: 28px;
    height: 28px;
    background-color: var(--light-blue-subtle);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--primary-blue);
}

.user-info {
    display: flex;
    flex-direction: column;
    font-size: 12px;
    flex: 1;
}

.user-info span:first-child {
    font-weight: 600;
    color: var(--dark-navy);
}

.user-role {
    font-size: 11px;
    color: var(--light-gray);
}

/* ===== Main Content Area ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

/* Content Header */
.content-header {
    height: var(--header-height);
    background-color: var(--white);
    border-bottom: 1px solid var(--light-blue-border);
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    box-shadow: 0 2px 8px var(--shadow-light);
}

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

.btn-menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--light-blue-border);
    border-radius: var(--radius-sm);
    color: var(--slate-gray);
    cursor: pointer;
    padding: 8px;
    width: 32px;
    height: 32px;
    transition: all var(--transition-fast);
}

.btn-menu-toggle:hover {
    background-color: var(--light-blue-subtle);
    color: var(--primary-blue);
}

.menu-icon {
    font-size: 16px;
    font-weight: bold;
}

.page-info h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-xs);
}

.breadcrumb {
    font-size: 11px;
    color: var(--light-gray);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.breadcrumb a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--primary-blue-dark);
    text-decoration: underline;
}

.breadcrumb .breadcrumb-separator {
    color: var(--light-gray);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

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

/* Content Area */
.content-area {
    flex: 1;
    position: relative;
    overflow: hidden;
    background-color: var(--light-blue-bg);
}

#contentFrame {
    width: 100%;
    height: 100%;
    border: none;
    background-color: var(--white);
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    display: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--light-blue-border);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

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

.loading-text {
    color: var(--slate-gray);
    font-size: 13px;
}

/* Content Footer */
.content-footer {
    height: var(--footer-height);
    background-color: var(--white);
    border-top: 1px solid var(--light-blue-border);
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--light-gray);
}

.footer-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.footer-links a {
    color: var(--primary-blue);
    text-decoration: none;
    margin-right: var(--spacing-lg);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-blue-dark);
    text-decoration: underline;
}

.footer-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.data-status {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    background-color: var(--light-blue-subtle);
    color: var(--primary-blue);
    font-style: italic;
}

.iso-compliance {
    background: var(--light-blue-subtle);
    color: var(--primary-blue);
    padding: 3px 8px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.3px;
}

/* ===== Button Styles - HydroBlue ISO ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 8px 16px;
    border: 1px solid var(--light-blue-border);
    border-radius: var(--radius-md);
    background-color: var(--white);
    color: var(--dark-navy);
    font-family: 'Inter', Arial, sans-serif;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    user-select: none;
}

.btn:hover {
    background-color: var(--light-blue-subtle);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: 12px;
}

.btn-primary {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-blue-dark);
    border-color: var(--primary-blue-dark);
    color: white;
}

.btn-secondary {
    background-color: var(--white);
    border-color: var(--light-blue-border);
    color: var(--dark-navy);
}

.btn-secondary:hover {
    background-color: var(--light-blue-subtle);
    border-color: var(--primary-blue);
    color: var(--dark-navy);
}

.btn-danger {
    background-color: var(--error-red);
    border-color: var(--error-red);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
    border-color: #dc2626;
    color: white;
}

.btn-success {
    background-color: var(--success-green);
    border-color: var(--success-green);
    color: white;
    font-weight: 600;
}

.btn-success:hover {
    background-color: #047857;
    border-color: #047857;
    color: white;
}

.btn-save {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
    color: white;
}

.btn-export {
    background-color: var(--white);
    border-color: var(--light-blue-border);
    color: var(--dark-navy);
}

.btn-export:hover {
    background-color: var(--light-blue-subtle);
    border-color: var(--primary-blue);
}

/* Progress Indicator */
.progress-indicator {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    min-width: 200px;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--light-blue-border);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-blue), #3b82f6);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-text {
    font-size: 11px;
    color: var(--light-gray);
    font-weight: 500;
}

/* ===== Modal Container ===== */
.modal-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(7, 32, 53, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-lg);
}

.modal {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-large);
    border: 1px solid var(--light-blue-border);
}

.modal-header {
    margin-bottom: var(--spacing-lg);
}

.modal-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-xs);
}

.modal-body {
    margin-bottom: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

.hidden { display: none !important; }
.visible { display: block !important; }

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.status-complete {
    background-color: var(--success-bg);
    color: var(--success-green);
    border: 1px solid rgba(6, 95, 70, 0.2);
}

.status-inprogress {
    background-color: #f0f9ff;
    color: #0369a1;
    border: 1px solid rgba(3, 105, 161, 0.2);
}

.status-pending {
    background-color: var(--warning-bg);
    color: var(--warning-orange);
    border: 1px solid rgba(249, 115, 22, 0.2);
}

.status-overdue {
    background-color: var(--error-bg);
    color: var(--error-red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Tooltip */
.tooltip {
    position: relative;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--dark-navy);
    color: var(--white);
    font-size: 11px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    z-index: var(--z-tooltip);
    border: 1px solid var(--light-blue-border);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 220px;
    }
    
    .sidebar {
        position: absolute;
        left: -260px;
        height: 100%;
        transition: left 0.3s;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .btn-menu-toggle {
        display: flex;
    }
    
    .content-header {
        padding: 0 var(--spacing-md);
    }
    
    .header-actions {
        flex-wrap: wrap;
        justify-content: flex-end;
    }
    
    .progress-indicator {
        min-width: 150px;
    }
    
    .footer-left, .footer-right {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .content-header,
    .content-footer,
    .btn {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    #contentFrame {
        position: static !important;
        height: auto !important;
    }
}