/* Base Styles */
:root {
    /* Color Palette (Acorns-inspired) */
    --primary-color: #4E9F3D;  /* Green */
    --primary-light: #9DDA8F;
    --secondary-color: #2D5A27;
    --accent-color: #F8B400;
    --light-gray: #F7F7F7;
    --medium-gray: #E0E0E0;
    --dark-gray: #333333;
    --white: #FFFFFF;
    
    /* Typography */
    --font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --heading-weight: 600;
    --body-weight: 400;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    
    /* Borders */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.1);
    
    /* Animation (per our animation guidelines) */
    --transition-fast: 150ms ease-out;
    --transition-normal: 300ms ease-out;
    --transition-slow: 500ms ease-out;
}

/* Dark mode support */
[data-theme="dark"] {
    --primary-color: #3D8C3A;
    --primary-light: #6BAB68;
    --secondary-color: #1D401D;
    --accent-color: #DDA000;
    --light-gray: #222222;
    --medium-gray: #444444;
    --dark-gray: #E0E0E0;
    --white: #121212;
}

/* Accessibility - Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fast: 0ms;
        --transition-normal: 0ms;
        --transition-slow: 0ms;
    }
}

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

/* Base Elements */
body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
    color: var(--dark-gray);
    background-color: var(--light-gray);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--heading-weight);
    margin-bottom: var(--spacing-md);
    color: var(--dark-gray);
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

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

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

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

/* Focus states for accessibility */
a:focus, button:focus, input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    padding: 0 15px;
    flex: 1;
}

/* For screen readers - accessibility */
.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;
}

/* Skip to content - accessibility */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    z-index: 100;
    transition: top var(--transition-normal);
}

.skip-to-content:focus {
    top: 0;
}

/* Site Header */
.site-header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md) 0;
    position: relative;
    z-index: 10;
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.navbar-brand {
    font-weight: var(--heading-weight);
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
}

.navbar-brand img {
    margin-right: var(--spacing-sm);
    height: 40px;
}

.navbar-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin-left: var(--spacing-md);
}

.nav-link {
    color: var(--dark-gray);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--light-gray);
}

.nav-link.active {
    font-weight: var(--heading-weight);
    color: var(--primary-color);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    display: none;
    background-color: var(--white);
    min-width: 160px;
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xs) 0;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--dark-gray);
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--light-gray);
}

/* Buttons */
.btn {
    display: inline-block;
    font-weight: var(--heading-weight);
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

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

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

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

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

.btn-accent:hover {
    background-color: darken(var(--accent-color), 10%);
    border-color: darken(var(--accent-color), 10%);
}

/* Cards */
.card {
    background-color: var(--white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: box-shadow var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-title {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
}

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

.card-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--medium-gray);
}

/* Hero Sections */
.hero {
    padding: var(--spacing-xl) 0;
    background-color: var(--white);
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--dark-gray);
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--heading-weight);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: none;
}

.form-hint {
    display: block;
    font-size: 0.875rem;
    color: var(--dark-gray);
    margin-top: var(--spacing-xs);
}

.form-error {
    color: #e53935;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

/* Alerts and Notifications */
.alert {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    border-left: 4px solid transparent;
}

.alert-success {
    background-color: #e8f5e9;
    border-left-color: #4caf50;
    color: #2e7d32;
}

.alert-info {
    background-color: #e3f2fd;
    border-left-color: #2196f3;
    color: #0d47a1;
}

.alert-warning {
    background-color: #fff8e1;
    border-left-color: #ffc107;
    color: #ff8f00;
}

.alert-error {
    background-color: #ffebee;
    border-left-color: #f44336;
    color: #c62828;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-lg);
}

.table th, 
.table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--medium-gray);
}

.table th {
    font-weight: var(--heading-weight);
    background-color: var(--light-gray);
}

.table tbody tr:hover {
    background-color: rgba(0,0,0,0.02);
}

/* Footer */
.site-footer {
    background-color: var(--white);
    box-shadow: 0 -2px 4px rgba(0,0,0,0.05);
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-nav-item {
    margin-right: var(--spacing-md);
}

.footer-nav-link {
    color: var(--dark-gray);
    text-decoration: none;
}

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

.footer-social {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-social-item {
    margin-left: var(--spacing-sm);
}

.footer-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    transition: background-color var(--transition-fast);
}

.footer-social-link:hover {
    background-color: var(--primary-light);
    color: var(--white);
}

/* Responsive Design - Mobile First */
@media (min-width: 576px) {
    .container {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
    }
}

@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* Mobile Styles */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .navbar-nav {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-item {
        margin: var(--spacing-xs) 0;
    }
    
    .dropdown-menu {
        position: static;
        box-shadow: none;
        padding-left: var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
}

/* Universal Header & Minimal Footer */
.universal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.account-access {
    display: flex;
    align-items: center;
}

.account-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--dark-gray);
    transition: background-color var(--transition-fast);
}

.account-icon:hover {
    background-color: var(--light-gray);
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: background-color var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--light-gray);
}

.footer-minimal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    font-size: 0.875rem;
}

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

.footer-links li {
    margin-left: var(--spacing-md);
}

.footer-links a {
    color: var(--dark-gray);
    text-decoration: none;
}

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

.copyright {
    margin: 0;
}

@media (max-width: 576px) {
    .footer-minimal {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        margin-top: var(--spacing-sm);
    }
    
    .footer-links li:first-child {
        margin-left: 0;
    }
}

/* Site Navigation */
.site-navigation {
    background-color: var(--white);
    border-bottom: 1px solid var(--medium-gray);
    padding: var(--spacing-sm) 0;
}

.site-navigation .navbar {
    padding: 0;
}

.welcome-navigation {
    background-color: var(--white);
}

.welcome-cta {
    margin-left: auto;
}

.auth-card {
    border: none;
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

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

@media (max-width: 992px) {
    .welcome-cta {
        margin-top: var(--spacing-md);
        margin-left: 0;
    }
}