/**
 * Modern UI Polish for DRC Assist
 * Implements consistent spacing, typography, hover states, tooltips, and fixes overlays
 */

/* ===== CONSISTENT SPACING SYSTEM ===== */
:root {
    /* Spacing Scale - 8px base */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-xxl: 3rem;     /* 48px */
    
    /* Typography Scale */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-xxl: 1.5rem;    /* 24px */
    --font-size-xxxl: 2rem;     /* 32px */
    
    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Border Radius */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transition Speeds */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ===== TYPOGRAPHY IMPROVEMENTS ===== */
h1, .h1 {
    font-size: var(--font-size-xxxl);
    font-weight: 700;
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-lg);
    color: #ffffff;
    letter-spacing: -0.025em;
}

h2, .h2 {
    font-size: var(--font-size-xxl);
    font-weight: 600;
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
    color: #f8f9fa;
    letter-spacing: -0.015em;
}

h3, .h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-md);
    color: #f8f9fa;
}

h4, .h4 {
    font-size: var(--font-size-lg);
    font-weight: 500;
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-sm);
    color: #e9ecef;
}

h5, .h5 {
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-sm);
    color: #e9ecef;
}

h6, .h6 {
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-sm);
    color: #dee2e6;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Body text improvements */
p {
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
    color: #e9ecef;
}

.lead {
    font-size: var(--font-size-lg);
    font-weight: 400;
    line-height: var(--line-height-relaxed);
    color: #f8f9fa;
}

/* ===== CONSISTENT SPACING ===== */
.section-spacing {
    padding: var(--spacing-xxl) 0;
}

.card-spacing {
    margin-bottom: var(--spacing-xl);
}

.element-spacing > * + * {
    margin-top: var(--spacing-md);
}

.tight-spacing > * + * {
    margin-top: var(--spacing-sm);
}

.loose-spacing > * + * {
    margin-top: var(--spacing-lg);
}

/* ===== ENHANCED HOVER STATES ===== */
.card {
    transition: all var(--transition-normal);
    border: 1px solid #374151;
    background: #1a1d29;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: #6366f1;
}

.card-interactive:hover {
    background: #1f2937;
    cursor: pointer;
}

/* Button hover enhancements */
.btn {
    transition: all var(--transition-normal);
    border-radius: var(--border-radius-md);
    font-weight: 500;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left var(--transition-fast);
}

.btn:hover::before {
    left: 100%;
}

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

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

.btn-primary {
    background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5b21b6 0%, #7c3aed 100%);
}

.btn-outline-primary {
    border: 2px solid #7c3aed;
    color: #a855f7;
    background: transparent;
}

.btn-outline-primary:hover {
    background: #7c3aed;
    color: #ffffff;
    border-color: #7c3aed;
}

/* Link hover states */
a {
    transition: color var(--transition-fast);
    text-decoration: none;
}

a:hover {
    color: #a855f7;
    text-decoration: underline;
    text-decoration-color: #7c3aed;
    text-underline-offset: 0.25rem;
}

/* ===== TOOLTIPS ===== */
.tooltip {
    --bs-tooltip-bg: #1f2937;
    --bs-tooltip-color: #f8f9fa;
    --bs-tooltip-border-color: #374151;
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
}

.tooltip-inner {
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 300px;
    text-align: left;
    line-height: var(--line-height-normal);
}

/* Custom tooltip trigger */
.tooltip-trigger {
    position: relative;
    cursor: help;
    color: #6b7280;
    transition: color var(--transition-fast);
}

.tooltip-trigger:hover {
    color: #9ca3af;
}

/* ===== CONTEXTUAL HELP ICONS ===== */
.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50%;
    color: #a855f7;
    font-size: var(--font-size-xs);
    margin-left: var(--spacing-xs);
    cursor: help;
    transition: all var(--transition-fast);
}

.help-icon:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: #6366f1;
    color: #d8b4fe;
    transform: scale(1.1);
}

.help-text {
    font-size: var(--font-size-sm);
    color: #9ca3af;
    margin-top: var(--spacing-xs);
    line-height: var(--line-height-normal);
}

/* ===== FLOATING ACTION BUTTON FIXES ===== */
.quick-access-fab {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 1040; /* Below modals (1050) but above content */
    transition: all var(--transition-normal);
}

/* Prevent FAB from overlaying content on small screens */
@media (max-width: 768px) {
    .quick-access-fab {
        bottom: var(--spacing-lg);
        right: var(--spacing-md);
        transform: scale(0.9);
    }
    
    /* Add bottom padding to main content to prevent overlap */
    .main-content,
    .content-wrapper {
        padding-bottom: 120px !important;
    }
}

/* FAB hover states */
.fab-trigger {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    border: none;
    color: white;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.fab-trigger:hover {
    background: linear-gradient(135deg, #5b21b6 0%, #7c3aed 100%);
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.fab-trigger:active {
    transform: scale(0.95);
}

/* FAB menu items */
.fab-menu {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: #1f2937;
    border: 1px solid #374151;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-xl);
    min-width: 200px;
    opacity: 0;
    transform: translateY(10px) scale(0.95);
    transition: all var(--transition-normal);
    pointer-events: none;
}

.fab-menu.show {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
}

.fab-menu-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    color: #f8f9fa;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    transition: background-color var(--transition-fast);
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

.fab-menu-item:hover {
    background: #374151;
    color: #ffffff;
}

.fab-menu-item i {
    margin-right: var(--spacing-sm);
    width: 1.25rem;
    text-align: center;
}

/* ===== FORM ENHANCEMENTS ===== */
.form-label {
    font-weight: 500;
    color: #f8f9fa;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
}

.form-control,
.form-select {
    background: #1f2937;
    border: 1px solid #374151;
    color: #f8f9fa;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-fast);
    font-size: var(--font-size-base);
}

.form-control:focus,
.form-select:focus {
    background: #111827;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    color: #ffffff;
}

.form-control::placeholder {
    color: #9ca3af;
}

/* ===== TABLE ENHANCEMENTS ===== */
.table {
    --bs-table-bg: #1a1d29;
    --bs-table-border-color: #374151;
    --bs-table-hover-bg: #1f2937;
    --bs-table-hover-color: #ffffff;
}

.table th {
    background: #111827;
    color: #f8f9fa;
    font-weight: 600;
    border-bottom: 2px solid #374151;
    padding: var(--spacing-md);
}

.table td {
    padding: var(--spacing-md);
    vertical-align: middle;
    border-bottom: 1px solid #374151;
}

.table tbody tr:hover {
    background: var(--bs-table-hover-bg);
    cursor: pointer;
}

/* ===== BADGE ENHANCEMENTS ===== */
.badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* ===== ALERT ENHANCEMENTS ===== */
.alert {
    border: none;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border-left-color: #22c55e;
    color: #86efac;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: #f59e0b;
    color: #fde68a;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border-left-color: #ef4444;
    color: #fca5a5;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border-left-color: #3b82f6;
    color: #93c5fd;
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 768px) {
    :root {
        --spacing-xs: 0.125rem;   /* 2px */
        --spacing-sm: 0.375rem;   /* 6px */
        --spacing-md: 0.75rem;    /* 12px */
        --spacing-lg: 1.25rem;    /* 20px */
        --spacing-xl: 1.75rem;    /* 28px */
        --spacing-xxl: 2.5rem;    /* 40px */
    }
    
    h1, .h1 { font-size: 1.75rem; }
    h2, .h2 { font-size: 1.5rem; }
    h3, .h3 { font-size: 1.25rem; }
    
    .card {
        margin-bottom: var(--spacing-lg);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    .card {
        border-width: 2px;
        border-color: #ffffff;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .form-control,
    .form-select {
        border-width: 2px;
    }
}

/* Focus visible for keyboard navigation */
.btn:focus-visible,
.form-control:focus-visible,
.form-select:focus-visible,
a:focus-visible {
    outline: 3px solid #6366f1;
    outline-offset: 2px;
}