@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Newsreader:wght@600;700;800&display=swap');

:root {
    /* Typography */
    --font-heading: 'Newsreader', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Colors - Light Mode */
    --color-text-primary: #0f172a;
    --color-text-secondary: #64748b;
    --color-accent: #2563eb;
    --color-accent-hover: #1e40af;
    --color-border: #e2e8f0;
    --color-bg: #ffffff;
    --color-bg-subtle: #f8fafc;
    
    /* RGB values for semi-transparent overlays */
    --color-bg-rgb: 255, 255, 255;
    --color-bg-subtle-rgb: 248, 250, 252;
    
    /* Spacing Scale (8px base) */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    
    /* Layout */
    --container-max: clamp(720px, 90vw, 1200px);
    --content-max: 800px;

    /* Semantic colors */
    --color-success: #198754;
    --color-warning: #fd7e14;
    --color-muted: #6c757d;
    --card-shadow: 0 1px 3px rgba(2,6,23,0.06);
}

/* Dark Mode - Reader-friendly palette optimized for reduced eye strain */
[data-theme="dark"] {
    /* Dark mode colors with warm tones for comfortable reading */
    --color-text-primary: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-accent: #60a5fa;
    --color-accent-hover: #93c5fd;
    --color-border: #334155;
    --color-bg: #0f172a;
    --color-bg-subtle: #1e293b;
    --color-success: #16a34a;
    --color-warning: #f59e0b;
    --color-muted: #94a3b8;
    --card-shadow: 0 1px 3px rgba(2,6,23,0.45);
    
    /* RGB values for semi-transparent overlays */
    --color-bg-rgb: 15, 23, 42;
    --color-bg-subtle-rgb: 30, 41, 59;
}

html, body {
    font-family: var(--font-body);
    color: var(--color-text-primary);
    background-color: var(--color-bg-subtle);
    font-size: 16px;
    line-height: 1.6;
}

/* Prevent background scroll when mobile nav is open */
body.no-scroll {
    overflow: hidden;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent-hover);
    text-decoration: none;
}

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

.btn-primary {
    color: #fff;
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    transition: all 0.2s ease;
    border-radius: 6px;
}

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

.btn-outline-primary {
    transition: all 0.2s ease;
    border-radius: 6px;
}

/* Button icon spacing */
.btn i,
.btn span[class^="bi-"],
.btn span[class^="fa-"] {
    margin-right: 0.5rem;
}

.btn i:last-child,
.btn span[class^="bi-"]:last-child,
.btn span[class^="fa-"]:last-child {
    margin-right: 0;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.content {
    padding-top: var(--spacing-xl);
    max-width: var(--container-max);
    margin: 0 auto;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

h1:focus {
    outline: none;
}

h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

h5 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

h6 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

.prose { 
    max-width: var(--content-max); 
    line-height: 1.8; 
    font-size: 1.125rem;
    color: var(--color-text-primary);
}
.prose h1 { 
    font-family: var(--font-heading);
    margin-top: 2em;
    margin-bottom: 0.8em;
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}
.prose h2 { 
    font-family: var(--font-heading);
    margin-top: 1.8em;
    margin-bottom: 0.7em;
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}
.prose h3 { 
    font-family: var(--font-heading);
    margin-top: 1.6em;
    margin-bottom: 0.6em;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--color-text-primary);
}
.prose p { 
    margin: 1.25em 0;
    line-height: 1.8;
}
.prose pre { 
    overflow-x: auto; 
    padding: 1rem; 
    border-radius: 8px;
    background-color: #1f2937;
    color: #f3f4f6;
    margin: 1.5em 0;
}
.prose code {
    background-color: #f3f4f6;
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
    color: #e11d48;
}
.prose pre code {
    background: none;
    padding: 0;
    color: inherit;
}
.prose img {
    border-radius: 8px;
    margin: 2em 0;
}
.prose a {
    color: #2563eb;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}
.prose a:hover {
    color: #1e40af;
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1050;
}

/* Card Styles */
.post-card {
    background: var(--color-bg);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: all 0.2s ease;
    border: 1px solid var(--color-border);
}

.post-card:hover {
    border-color: var(--color-accent);
}

.post-card-image {
    width: 100%;
    aspect-ratio: 16/9;
    height: auto;
    max-height: 360px;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: var(--spacing-sm);
}

.post-card-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin: var(--spacing-xs) 0;
    color: var(--color-text-primary);
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.post-card-title a {
    color: inherit;
    text-decoration: none;
}

.post-card-title a:hover {
    color: var(--color-accent);
}

.post-card-meta {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.post-card-meta a {
    color: var(--color-accent);
    font-weight: 500;
}

.post-card-summary {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.category-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-bg-subtle);
    color: var(--color-accent);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-right: var(--spacing-xs);
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.page-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin: 0;
}

/* Navigation Menu Styles */
.nav-header {
    padding: 48px 24px 32px;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    border-bottom: 1px solid var(--color-border);
    position: relative;
}

.nav-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent) 50%, transparent);
    opacity: 0.3;
}

.brand-logo {
    text-decoration: none;
    display: block;
    position: relative;
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    transition: all 0.3s ease;
    line-height: 1.2;
}

.brand-logo:hover .brand-name {
    color: var(--color-accent);
    transform: translateY(-1px);
}

.nav-menu {
    display: flex;
    flex-direction: column;
    padding: 32px 0;
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.nav-text {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    margin: 2px 12px;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border-radius: 8px;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--color-accent);
    border-radius: 0 2px 2px 0;
    transition: height 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover {
    color: var(--color-text-primary);
    background-color: var(--color-bg-subtle);
    transform: translateX(4px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.nav-link:hover::before {
    height: 60%;
}

.nav-link.active {
    color: var(--color-accent);
    background-color: rgba(37, 99, 235, 0.08);
    font-weight: 600;
    transform: translateX(4px);
}

.nav-link.active::before {
    height: 70%;
}

.nav-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
    margin: 24px 32px;
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    position: absolute;
    top: 24px;
    right: 24px;
    padding: 8px;
    z-index: 1000;
}

.nav-toggle-label span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

@media (max-width: 640px) {
    .nav-toggle-label {
        display: flex;
    }

    .nav-menu {
        display: none;
    }

    .nav-toggle:checked ~ .nav-menu {
        display: flex;
    }

    .nav-toggle:checked ~ .nav-toggle-label span:first-child {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle:checked ~ .nav-toggle-label span:last-child {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}