/**
 * Murphy Software Labs — Global Design System
 * Color Palette: Option C "Slate & Sky" (Steel Blue + Warm Gray)
 * 
 * DESIGN PRINCIPLES:
 * - No gradients (solid colors only)
 * - Clean, professional aesthetic
 * - Responsive and accessible
 */

/* ======================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ====================================== */

:root {
    /* Primary Blue */
    --color-primary: #0369A1;
    --color-primary-hover: #075985;
    --color-primary-light: #E0F2FE;

    /* Accents */
    --color-accent: #38BDF8;
    --color-accent-muted: #7DD3FC;

    /* Neutrals */
    --color-background: #FAFAFA;
    --color-surface: #F5F5F5;
    --color-surface-elevated: #FFFFFF;
    --color-text: #262626;
    --color-text-muted: #737373;
    --color-text-light: #A3A3A3;
    --color-border: #D4D4D4;
    --color-border-light: #E5E5E5;

    /* Status Colors */
    --color-success: #22C55E;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --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 */

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --space-xs: 0.25rem;
    /* 4px */
    --space-sm: 0.5rem;
    /* 8px */
    --space-md: 1rem;
    /* 16px */
    --space-lg: 1.5rem;
    /* 24px */
    --space-xl: 2rem;
    /* 32px */
    --space-2xl: 3rem;
    /* 48px */
    --space-3xl: 4rem;
    /* 64px */

    /* Border Radius */
    --radius-sm: 0.25rem;
    /* 4px */
    --radius-md: 0.5rem;
    /* 8px */
    --radius-lg: 0.75rem;
    /* 12px */
    --radius-xl: 1rem;
    /* 16px */
    --radius-full: 9999px;

    /* 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 -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --container-max-width: 1200px;
    --content-max-width: 800px;
}

/* ======================================
   CSS RESET (Minimal)
   ====================================== */

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

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

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

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-text);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-md);
}

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(--space-md);
}

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

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

a:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

ul,
ol {
    padding-left: var(--space-lg);
    margin-bottom: var(--space-md);
}

li {
    margin-bottom: var(--space-xs);
}

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

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.content-width {
    max-width: var(--content-max-width);
}

/* ======================================
   BUTTON COMPONENTS
   ====================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:hover {
    text-decoration: none;
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
    background-color: var(--color-primary);
    color: #FFFFFF;
    border-color: var(--color-primary);
}

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

/* Secondary Button (Outline) */
.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

/* Button Sizes */
.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
}

/* ======================================
   CARD COMPONENT (Base)
   ====================================== */

.card {
    background-color: var(--color-surface-elevated);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal);
}

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

/* ======================================
   FORM ELEMENTS (Base)
   ====================================== */

.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-light);
}

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

/* ======================================
   BADGE COMPONENT
   ====================================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.badge-success {
    background-color: #DCFCE7;
    color: #166534;
}

.badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-muted {
    background-color: var(--color-surface);
    color: var(--color-text-muted);
}

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

.section {
    padding: var(--space-3xl) 0;
}

.section-sm {
    padding: var(--space-2xl) 0;
}

.section-lg {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header h2 {
    margin-bottom: var(--space-sm);
}

.section-header p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto;
}

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

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

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

.text-primary {
    color: var(--color-primary);
}

.text-success {
    color: var(--color-success);
}

.text-warning {
    color: var(--color-warning);
}

.text-danger {
    color: var(--color-danger);
}

.text-sm {
    font-size: var(--font-size-sm);
}

.text-lg {
    font-size: var(--font-size-lg);
}

.text-xl {
    font-size: var(--font-size-xl);
}

.font-medium {
    font-weight: var(--font-weight-medium);
}

.font-semibold {
    font-weight: var(--font-weight-semibold);
}

.font-bold {
    font-weight: var(--font-weight-bold);
}

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

.mt-0 {
    margin-top: 0;
}

.mt-sm {
    margin-top: var(--space-sm);
}

.mt-md {
    margin-top: var(--space-md);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.mt-xl {
    margin-top: var(--space-xl);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-sm {
    margin-bottom: var(--space-sm);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

.mb-xl {
    margin-bottom: var(--space-xl);
}

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

.site-header {
    background-color: var(--color-surface-elevated);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.nav-logo {
    text-decoration: none !important;
}

.nav-logo:hover {
    text-decoration: none !important;
}

/* Hybrid Logo Styles */
.logo-composite {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    height: 40px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-name {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    letter-spacing: -0.01em;
}

.logo-labs {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle-bar {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition-fast);
}

.nav-menu {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-surface-elevated);
    border-bottom: 1px solid var(--color-border-light);
    flex-direction: column;
}

.nav-menu--open {
    display: flex;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: block;
    padding: var(--space-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-surface);
    text-decoration: none;
}

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

/* Nav Actions (Login/Logout) */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

/* Mobile auth links (hidden on desktop) */
.nav-item--mobile-auth {
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
}

/* ======================================
   SITE FOOTER
   ====================================== */

.site-footer {
    background-color: var(--color-text);
    color: var(--color-surface);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-logo {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: #FFFFFF;
    margin-bottom: var(--space-xs);
}

.footer-logo-link img {
    height: 40px;
    width: auto;
    object-fit: contain;
    margin-bottom: var(--space-xs);
}

.footer-tagline {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin: 0;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-links a {
    color: var(--color-surface);
    text-decoration: none;
    font-size: var(--font-size-sm);
}

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

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--space-xs);
}

.footer-legacy {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    margin: 0;
}

/* ======================================
   RESPONSIVE BREAKPOINTS
   ====================================== */

/* Tablet (768px and up) */
@media (min-width: 768px) {
    h1 {
        font-size: var(--font-size-5xl);
    }

    h2 {
        font-size: var(--font-size-4xl);
    }

    .container {
        padding: 0 var(--space-lg);
    }

    /* Navigation - Desktop layout */
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        display: flex;
        flex-direction: row;
        position: static;
        background: none;
        border: none;
        gap: var(--space-xs);
    }

    .nav-link {
        padding: var(--space-sm) var(--space-md);
        border-radius: var(--radius-md);
    }

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

    /* Footer - Desktop layout */
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-xl);
    }
}