/* -------------------------------------------------------------
 * Hostel Management Admin Panel - Core Stylesheet
 * -------------------------------------------------------------
 * Design System:
 * Primary:       #2E8B57 (SeaGreen)
 * Primary Dark:  #236B43
 * Background:    #F5F7F6
 * White:         #FFFFFF
 * Text:          #1F2937
 * Muted:         #6B7280
 * Border:        #E5E7EB
 * Success:       #16A34A
 * Warning:       #F59E0B
 * Danger:        #DC2626
 * ------------------------------------------------------------- */

*, *::before, *::after {
    box-sizing: border-box;
}

:root {
    --color-primary: #2E8B57;
    --color-primary-dark: #236B43;
    --color-primary-light: #EBF5F0;
    --color-primary-50: #F4FBF7;
    --color-bg: #F5F7F6;
    --color-card-bg: #FFFFFF;
    --color-text-main: #1F2937;
    --color-text-muted: #6B7280;
    --color-border: #E5E7EB;
    --color-border-light: #F3F4F6;
    --color-success: #16A34A;
    --color-warning: #F59E0B;
    --color-danger: #DC2626;
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --header-height: 64px;
}

html, body {
    width: 100%;
    min-height: 100%;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text-main);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Media element constraints to prevent overflow */
img, svg, video, canvas, audio, iframe {
    max-width: 100%;
    height: auto;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* Sidebar Custom Scrollbar */
.sidebar-scroll::-webkit-scrollbar {
    width: 4px;
}

.sidebar-scroll::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
}

.sidebar-scroll::-webkit-scrollbar-thumb {
    background: rgba(46, 139, 87, 0.3);
    border-radius: 4px;
}

/* Transitions */
.transition-sidebar {
    transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1), transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-dropdown {
    transition: opacity 0.15s ease-out, transform 0.15s ease-out;
}

.transition-fast {
    transition: all 0.15s ease-in-out;
}

/* Interactive Card Hover */
.admin-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    max-width: 100%;
    overflow-wrap: break-word;
}

.admin-card-hover:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -4px rgba(46, 139, 87, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    border-color: rgba(46, 139, 87, 0.3);
}

/* Primary Button Styling */
.btn-primary {
    background-color: var(--color-primary);
    color: #FFFFFF;
    font-weight: 500;
    border-radius: 0.5rem;
    padding: 0.625rem 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
    white-space: nowrap;
    text-decoration: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    box-shadow: 0 4px 12px rgba(46, 139, 87, 0.25);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-outline {
    background-color: #FFFFFF;
    color: var(--color-text-main);
    border: 1px solid var(--color-border);
    font-weight: 500;
    border-radius: 0.5rem;
    padding: 0.625rem 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    white-space: nowrap;
    text-decoration: none;
    cursor: pointer;
}

.btn-outline:hover {
    background-color: #F9FAFB;
    border-color: #D1D5DB;
    color: var(--color-primary);
}

/* Active Nav Link Marker */
.nav-link.active {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-weight: 600;
}

.nav-link.active .nav-icon {
    color: var(--color-primary);
}

.nav-link.active .active-indicator {
    opacity: 1;
}

/* Skeleton Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.skeleton-loading {
    background: linear-gradient(90deg, #F3F4F6 25%, #E5E7EB 50%, #F3F4F6 75%);
    background-size: 200% 100%;
    animation: shimmer 1.8s infinite;
}

/* Badge Styles */
.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
}

.badge-primary {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.badge-success {
    background-color: #DCFCE7;
    color: #15803D;
}

.badge-warning {
    background-color: #FEF3C7;
    color: #B45309;
}

.badge-danger {
    background-color: #FEE2E2;
    color: #B91C1C;
}

.badge-muted {
    background-color: #F3F4F6;
    color: #4B5563;
}

/* -------------------------------------------------------------
 * Responsive Layout & Component Enhancements
 * ------------------------------------------------------------- */

/* Universal Responsive Table Container */
.table-responsive, .responsive-table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 0.75rem;
}

.table-responsive::-webkit-scrollbar, 
.responsive-table-wrapper::-webkit-scrollbar {
    height: 5px;
}

.table-responsive::-webkit-scrollbar-thumb, 
.responsive-table-wrapper::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 4px;
}

/* Responsive Modal Styling */
.responsive-modal-container {
    max-width: calc(100vw - 24px);
    max-height: calc(100vh - 24px);
    width: 100%;
}

/* Form inputs responsive bounds */
input[type="text"], input[type="email"], input[type="password"],
input[type="number"], input[type="date"], input[type="tel"],
input[type="search"], select, textarea {
    max-width: 100%;
    box-sizing: border-box;
}

/* Text overflow safety */
.truncate-safe {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.break-words-safe {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* Horizontal tab list helper */
.tabs-nav-scroll {
    display: flex;
    align-items: center;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
}

.tabs-nav-scroll::-webkit-scrollbar {
    display: none; /* Safari and Chrome */
}

/* Breakpoint adjustments for ultra-small screens (320px - 375px) */
@media (max-width: 375px) {
    .btn-primary, .btn-outline {
        padding: 0.5rem 0.875rem;
        font-size: 0.75rem;
    }
    
    .badge-pill {
        padding: 0.2rem 0.4rem;
        font-size: 0.7rem;
    }
}