/*
 * ====================================
 * TUTORLINK PLATFORM - REFINED STYLES
 * ====================================
 * 
 * Refined and extended CSS supporting:
 * - index.php, login.php, logout.php, header.php, footer.php
 * - WCAG 2.1 AA compliance
 * - Mobile-first responsive design
 * - Consistent branding and accessibility
 * - Profile wizard and dashboard functionality
 * 
 * Version: 2.0.0
 * Last Updated: 2025
 */

/* ========================================
   CSS VARIABLES & BRAND COLORS
======================================== */
:root {
    /* Primary Brand Colors */
    --primary-color: #2563eb;           /* TutorLink Blue */
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary-color: #f59e0b;         /* TutorLink Gold */
    --secondary-dark: #d97706;
    --secondary-light: #fef3c7;
    
    /* Semantic Colors */
    --success-color: #10b981;
    --success-light: #d1fae5;
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    --error-color: #ef4444;
    --error-light: #fecaca;
    --info-color: #3b82f6;
    --info-light: #dbeafe;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Text Colors */
    --text-color: var(--gray-900);
    --text-dark: var(--gray-800);
    --text-muted: var(--gray-600);
    --text-light: var(--gray-500);
    
    /* Background Colors */
    --bg-color: var(--white);
    --bg-light: var(--gray-50);
    --bg-dark: var(--gray-100);
    --light-bg: var(--gray-50);
    
    /* Border Colors */
    --border-color: var(--gray-300);
    --border-light: var(--gray-200);
    --border-dark: var(--gray-400);
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-heading: var(--font-family-base);
    --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-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    
    /* Spacing Scale */
    --spacing-1: 0.25rem;   /* 4px */
    --spacing-2: 0.5rem;    /* 8px */
    --spacing-3: 0.75rem;   /* 12px */
    --spacing-4: 1rem;      /* 16px */
    --spacing-5: 1.25rem;   /* 20px */
    --spacing-6: 1.5rem;    /* 24px */
    --spacing-7: 1.75rem;   /* 28px */
    --spacing-8: 2rem;      /* 32px */
    --spacing-10: 2.5rem;   /* 40px */
    --spacing-12: 3rem;     /* 48px */
    --spacing-16: 4rem;     /* 64px */
    --spacing-20: 5rem;     /* 80px */
    
    /* Border Radius */
    --border-radius: 0.5rem;
    --border-radius-sm: 0.25rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    --border-radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    
    /* Transitions */
    --transition-base: all 0.2s ease-in-out;
    --transition-fast: all 0.15s ease-in-out;
    --transition-slow: all 0.3s ease-in-out;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ========================================
   BASE STYLES & RESET
======================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   ACCESSIBILITY & FOCUS STYLES
======================================== */
.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;
}

.sr-only-focusable:focus {
    position: static;
    width: auto;
    height: auto;
    padding: var(--spacing-2) var(--spacing-4);
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: var(--primary-color);
    color: var(--white);
    border-radius: var(--border-radius);
    text-decoration: none;
    z-index: var(--z-tooltip);
}

/* High contrast focus indicators for WCAG compliance */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

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

/* ========================================
   TYPOGRAPHY
======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 600;
    line-height: var(--line-height-tight);
    color: var(--text-dark);
    margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--text-color);
}

a {
    color: var(--primary-color);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: var(--transition-base);
}

a:hover {
    color: var(--primary-dark);
    text-decoration-thickness: 2px;
}

a:focus {
    color: var(--primary-dark);
    text-decoration-thickness: 2px;
}

/* ========================================
   LAYOUT & CONTAINERS
======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--spacing-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-8);
    }
}

main {
    min-height: 100vh;
    padding-top: 80px; /* Account for fixed header */
}

/* ========================================
   HEADER & NAVIGATION
======================================== */
header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    height: 80px;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    gap: var(--spacing-4);
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
}

.logo-image {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius);
    object-fit: contain;
}

.logo-text h1 {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-tight);
    margin: 0;
    color: var(--primary-color);
}

.logo-text span {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--border-radius);
    transition: var(--transition-base);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

/* Mobile menu toggle - for future implementation */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    padding: var(--spacing-2);
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-color);
    transition: var(--transition-base);
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* Hide until mobile menu is implemented */
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
}

/* ========================================
   BUTTONS & INTERACTIVE ELEMENTS
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1;
    text-decoration: none;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
    min-height: 44px; /* WCAG touch target size */
}

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

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    text-decoration: none;
}

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

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

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

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
    min-height: 48px;
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    min-height: 36px;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ========================================
   FORMS & INPUT ELEMENTS
======================================== */
.form-group {
    margin-bottom: var(--spacing-6);
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-base);
}

.form-label.required::after {
    content: ' *';
    color: var(--error-color);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-color);
    background-color: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition-base);
    font-family: var(--font-family-base);
    min-height: 44px; /* WCAG touch target size */
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--error-color);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* Enhanced form validation styles */
.form-input:valid:not(:focus):not(:placeholder-shown) {
    border-color: var(--success-color);
}

.form-input:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--error-color);
}

/* Checkbox and Radio Styling */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin: 0;
    flex-shrink: 0;
    margin-top: 2px; /* Align with first line of text */
}

.form-check-label {
    margin: 0;
    cursor: pointer;
    line-height: var(--line-height-normal);
}

/* File Upload Styling */
.file-input-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
}

.file-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-input-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-light);
    color: var(--text-muted);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
    min-height: 80px;
}

.file-input-label:hover {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
    color: var(--primary-color);
}

/* ========================================
   FORM SPECIFIC STYLES
======================================== */
.form-container {
    max-width: 600px;
    margin: var(--spacing-8) auto;
    background: var(--white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.form-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-8);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.form-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    pointer-events: none;
}

.form-header h1 {
    color: var(--white);
    margin: 0 0 var(--spacing-2) 0;
    font-size: var(--font-size-3xl);
    position: relative;
    z-index: 1;
}

.form-header p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    font-size: var(--font-size-lg);
    position: relative;
    z-index: 1;
}

.form-body {
    padding: var(--spacing-8);
}

.form-footer {
    text-align: center;
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--border-light);
}

.form-footer p {
    color: var(--text-muted);
    margin: 0;
}

.form-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* Form Sections */
.form-section {
    margin-bottom: var(--spacing-8);
    padding-bottom: var(--spacing-6);
    border-bottom: 1px solid var(--border-light);
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.form-section h3 {
    color: var(--text-dark);
    margin-bottom: var(--spacing-6);
    font-size: var(--font-size-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

/* Type Selection */
.type-selection {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
}

@media (max-width: 640px) {
    .type-selection {
        grid-template-columns: 1fr;
    }
}

.type-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    background-color: var(--white);
    position: relative;
}

.type-option:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.type-option.active {
    border-color: var(--primary-color);
    background: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.type-option.active::before {
    content: '✓';
    position: absolute;
    top: 10px;
    right: 15px;
    background: var(--primary-color);
    color: var(--white);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
}

.type-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.type-info h4 {
    margin-bottom: var(--spacing-1);
    color: var(--text-dark);
    font-size: var(--font-size-lg);
}

.type-info p {
    margin-bottom: 0;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* ========================================
   ALERT & NOTIFICATION STYLES
======================================== */
.alert {
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-6);
    border-left: 4px solid;
    font-weight: 500;
}

.alert p {
    margin: 0;
}

.alert-success {
    background-color: var(--success-light);
    border-color: var(--success-color);
    color: var(--success-color);
}

.alert-warning {
    background-color: var(--warning-light);
    border-color: var(--warning-color);
    color: var(--warning-color);
}

.alert-error {
    background-color: var(--error-light);
    border-color: var(--error-color);
    color: var(--error-color);
}

.alert-info {
    background-color: var(--info-light);
    border-color: var(--info-color);
    color: var(--info-color);
}

/* ========================================
   PROGRESS INDICATORS
======================================== */
.progress-container {
    background-color: var(--gray-200);
    border-radius: var(--border-radius-full);
    height: 8px;
    overflow: hidden;
    margin: var(--spacing-4) 0;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    height: 100%;
    border-radius: var(--border-radius-full);
    transition: width 0.3s ease;
}

.step-indicator {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: var(--spacing-6) 0;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
}

.step-item:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 60%;
    width: calc(100% - 40px);
    height: 2px;
    background-color: var(--border-color);
    z-index: 0;
}

.step-item.completed:not(:last-child)::after {
    background-color: var(--primary-color);
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--gray-300);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    position: relative;
    z-index: 1;
}

.step-item.active .step-number {
    background-color: var(--primary-color);
}

.step-item.completed .step-number {
    background-color: var(--success-color);
}

.step-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-align: center;
}

.step-item.active .step-label {
    color: var(--primary-color);
    font-weight: 500;
}

/* ========================================
   FOOTER STYLES
======================================== */
.site-footer {
    background-color: var(--gray-900);
    color: var(--gray-300);
    padding: var(--spacing-12) 0 var(--spacing-6);
    margin-top: var(--spacing-16);
}

.footer-content {
    display: grid;
    grid-template-columns: 200px repeat(4, 1fr);
    gap: var(--spacing-8);
    align-items: start;
    margin-bottom: var(--spacing-8);
}

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-6);
    }
    
    .footer-logo-section {
        grid-column: 1 / -1;
        margin-bottom: var(--spacing-4);
    }
}

@media (max-width: 640px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.footer-logo-image {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    object-fit: contain;
}

.footer-logo-text .footer-tagline {
    font-size: var(--font-size-xs);
    color: var(--primary-color);
    margin: 0;
    line-height: var(--line-height-tight);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-2);
}

.footer-links a {
    color: var(--gray-300);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition-base);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--gray-700);
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: var(--font-size-xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
    z-index: var(--z-fixed);
    display: none;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   HOMEPAGE SPECIFIC STYLES
======================================== */
.hero-section {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 100%);
    padding: var(--spacing-16) 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-6);
    line-height: var(--line-height-tight);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-muted);
    margin-bottom: var(--spacing-8);
    line-height: var(--line-height-relaxed);
}

.search-form {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-lg);
    margin: var(--spacing-8) 0;
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: var(--spacing-4);
    align-items: end;
}

@media (max-width: 768px) {
    .search-form {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
}

/* ========================================
   DASHBOARD & PROFILE WIZARD STYLES
======================================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
    margin: var(--spacing-8) 0;
}

.dashboard-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-base);
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
}

.dashboard-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--border-light);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.card-content {
    color: var(--text-color);
}

/* Profile Wizard Specific */
.wizard-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.wizard-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-8);
    text-align: center;
}

.wizard-body {
    padding: var(--spacing-8);
}

.wizard-navigation {
    display: flex;
    justify-content: space-between;
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--border-light);
}

/* ========================================
   ERROR & VALIDATION STYLES
======================================== */
.error-message {
    color: var(--error-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.field-error {
    border-color: var(--error-color) !important;
}

.field-error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Loading States */
.loading {
    position: relative;
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ========================================
   UTILITY CLASSES
======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-none { display: none; }

.flex-column { flex-direction: column; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 640px) {
    :root {
        --spacing-8: 1.5rem;
        --spacing-12: 2rem;
        --spacing-16: 2.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .form-container,
    .wizard-container {
        margin: var(--spacing-4) var(--spacing-4);
        border-radius: var(--border-radius-lg);
    }
    
    .form-body,
    .wizard-body {
        padding: var(--spacing-6);
    }
}

/* ========================================
   PRINT STYLES
======================================== */
@media print {
    .btn,
    .navbar,
    .site-footer,
    .back-to-top {
        display: none;
    }
    
    body {
        color: black;
        background: white;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
}

/* ========================================
   DARK MODE SUPPORT (Future Enhancement)
======================================== */
@media (prefers-color-scheme: dark) {
    /* Dark mode variables can be added here in future updates */
}

/* ========================================
   HIGH CONTRAST MODE (WCAG AAA)
======================================== */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-color: #000000;
        --bg-color: #ffffff;
    }
    
    .btn {
        border-width: 3px;
    }
    
    a {
        text-decoration-thickness: 2px;
    }
}

/* ========================================
   REDUCED MOTION (Accessibility)
======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    ::before,
    ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ========================================
   COMPONENTS SPECIFIC STYLES
======================================== */

/* Notification/Toast styles */
.notification {
    position: fixed;
    top: var(--spacing-6);
    right: var(--spacing-6);
    max-width: 400px;
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--border-radius);
    color: var(--white);
    font-weight: 500;
    z-index: var(--z-tooltip);
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background-color: var(--success-color);
}

.notification.error {
    background-color: var(--error-color);
}

.notification.warning {
    background-color: var(--warning-color);
}

.notification.info {
    background-color: var(--info-color);
}

/* Modal styles */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

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

.modal {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: scale(0.95);
    transition: var(--transition-base);
}

.modal-backdrop.show .modal {
    transform: scale(1);
}

.modal-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--border-light);
}

.modal-body {
    padding: var(--spacing-6);
}

.modal-footer {
    padding: var(--spacing-6);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-4);
}