/* ================================================
   General Queen - Main Stylesheet
   ================================================ */

/* ================================================
   CSS VARIABLES & DESIGN TOKENS
   ================================================ */

:root {
    /* Colors */
    --primary-color: #6C63FF;
    --secondary-color: #8B5CF6;
    --accent-color: #FF6B6B;
    --background-color: #FFFFFF;
    --text-color: #1F2937;
    --border-color: #E5E7EB;
    --light-gray: #F3F4F6;
    --dark-gray: #6B7280;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --background-color: #1F2937;
    --text-color: #F3F4F6;
    --border-color: #374151;
    --light-gray: #374151;
    --dark-gray: #9CA3AF;
}

/* ================================================
   GLOBAL STYLES
   ================================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-secondary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-color);
    background-color: var(--background-color);
    transition: background-color var(--transition-base), color var(--transition-base);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--secondary-color);
}

button, input, textarea, select {
    font-family: inherit;
}

/* ================================================
   TYPOGRAPHY
   ================================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
    font-weight: 700;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-md);
}

small {
    font-size: 0.875rem;
}

.text-muted {
    color: var(--dark-gray);
}

.text-light {
    color: #ADB5BD;
}

/* Theme-aware alternatives to Bootstrap's static bg-light/text-dark utilities,
   which stay locked to light-mode colors even when data-bs-theme is dark. */
.bg-surface {
    background-color: var(--light-gray);
}

.text-theme {
    color: var(--text-color) !important;
}

/* ================================================
   BUTTONS & INTERACTIVE ELEMENTS
   ================================================ */

.btn {
    font-family: var(--font-primary);
    font-weight: 500;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

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

.btn-accent {
    background-color: var(--accent-color);
    color: white;
}

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

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1.125rem;
}

/* ================================================
   CARDS & CONTAINERS
   ================================================ */

.card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background-color: var(--background-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-body {
    padding: var(--spacing-xl);
}

.card-header {
    background-color: var(--light-gray);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg);
}

.card-footer {
    background-color: var(--light-gray);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg);
}

.card-img-top {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* ================================================
   FORMS & INPUTS
   ================================================ */

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

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.1);
}

.form-label {
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-primary);
}

.form-check-input {
    width: 1.25em;
    height: 1.25em;
    border-radius: var(--radius-sm);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.input-group-text {
    background-color: var(--light-gray);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

/* ================================================
   ALERTS
   ================================================ */

.alert {
    border: none;
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    border-left-color: #10B981;
    background-color: #F0FDF4;
    color: #065F46;
}

.alert-danger {
    border-left-color: var(--accent-color);
    background-color: #FEF2F2;
    color: #7F1D1D;
}

.alert-warning {
    border-left-color: #F59E0B;
    background-color: #FFFBEB;
    color: #78350F;
}

.alert-info {
    border-left-color: var(--primary-color);
    background-color: #F0F9FF;
    color: #1E3A8A;
}

/* ================================================
   NAVIGATION
   ================================================ */

.navbar {
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.navbar > .container-fluid {
    align-items: center;
}

.navbar-collapse {
    align-items: center;
}

.navbar-nav {
    align-items: center;
}

.navbar-brand {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    color: var(--text-color) !important;
}

.nav-link {
    display: flex;
    align-items: center;
    height: 100%;
    font-weight: 500;
    /* Reserve the active-state border on every link so adding/removing it
       doesn't shift height and misalign items in the row. */
    border-bottom: 2px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

.nav-link.active {
    color: var(--primary-color) !important;
    border-bottom-color: var(--primary-color);
}

/* Icon-only nav buttons (theme toggle) must match .nav-link's box model
   exactly -- combining Bootstrap's .btn with .nav-link causes mismatched
   padding/line-height and visibly misaligns them from adjacent links. */
.navbar-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.75rem;
    border: none;
    background: transparent;
    border-bottom: 2px solid transparent;
    color: var(--text-color);
    line-height: 1;
    transition: color var(--transition-fast);
}

.navbar-icon-btn:hover {
    color: var(--primary-color);
}

.dropdown-menu {
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-lg);
    min-width: 16rem;
}

.dropdown-item {
    white-space: normal;
}

/* ================================================
   PAGINATION
   ================================================ */

.pagination {
    gap: var(--spacing-sm);
}

.page-link {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
}

.page-link:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.page-link.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ================================================
   UTILITIES
   ================================================ */

.container-fluid {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.section-padding {
    padding-top: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
}

.section-margin {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hover-lift {
    transition: all var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.fade-in {
    animation: fadeIn var(--transition-base) ease-in;
}

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

/* ================================================
   SCROLLBAR STYLING
   ================================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--dark-gray);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* ================================================
   ACCESSIBILITY
   ================================================ */

:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ================================================
   PRINT STYLES
   ================================================ */

@media print {
    body {
        background: white;
        color: black;
    }

    .navbar, footer, .btn-print-hide {
        display: none;
    }
}

/* ================================================
   TAP TARGET SIZING (mobile usability)
   ================================================ */

.navbar-toggler,
#theme-toggle {
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Images always fit their container on any screen size */
img {
    max-width: 100%;
    height: auto;
}

.card-img-top {
    max-width: 100%;
}