/* ==========================================================================
   Aiifi.ai - Main Stylesheet
   Dark professional theme with card-based layouts
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Colors - Modern light theme with cyan accents */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-card: #ffffff;
    --color-bg-card-hover: #f8fafc;

    --color-text-primary: #1e293b;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;

    --color-accent: #00c0d4;
    --color-accent-hover: #00a8ba;
    --color-accent-light: rgba(0, 192, 212, 0.1);
    --color-accent-bright: #00e5ff;

    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-border-form: #cccccc;

    --color-error-light: #ffcccc;
    --color-placeholder: #888888;
    --color-bg-tertiary: #e8e8e8;

    /* Header/Footer specific */
    --color-header-bg: #00c0d4;
    --color-footer-bg: #00c0d4;
    --color-header-text: #ffffff;
    --color-footer-link: #0d3d4d;

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-size-small: 0.8rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;

    /* Content widths */
    --content-width-narrow: 680px;
    --content-width-medium: 800px;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    background-color: var(--color-accent);
}

body {
    font-family: var(--font-body);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
}

h1 { font-size: 2rem; margin-bottom: var(--spacing-sm); }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

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

p:last-child {
    margin-bottom: 0;
}

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

.main-content {
    flex: 1;
    padding: 0;
    padding-bottom: var(--spacing-md);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-header-bg);
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 45px;
}

.logo {
    display: flex;
    align-items: center;
    height: 100%;
}

.logo img {
    height: 112px;
    width: auto;
    display: block;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-list a {
    color: var(--color-header-text);
    font-weight: 500;
    padding: 0;
    position: relative;
}

.nav-list a:hover {
    color: var(--color-header-text);
    opacity: 0.85;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-header-text);
    transition: width var(--transition-base);
}

.nav-list a:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background-color: var(--color-header-text);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 57px;
        left: 0;
        right: 0;
        background-color: var(--color-header-bg);
        padding: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    }

    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav-list a {
        display: block;
        padding: var(--spacing-sm);
        color: var(--color-header-text);
    }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background-color: var(--color-footer-bg);
    padding: 0;
    margin-top: auto;
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.footer-top {
    display: grid;
    grid-template-columns: auto auto 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    padding: var(--spacing-xs) 0;
}

.footer-brand {
    display: flex;
    align-items: center;
    height: 100%;
}

.footer-logo {
    display: flex;
    align-items: center;
    height: 100%;
}

.footer-logo img {
    height: 112px;
    width: auto;
    display: block;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.footer-links a {
    color: var(--color-header-text);
    font-weight: 400;
}

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

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

.footer-newsletter h3 {
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-xs);
    color: var(--color-header-text);
    font-weight: 500;
}

/* Shared form input styles */
.form-input {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border-form);
    border-radius: 0;
    color: var(--color-text-primary);
    font-family: var(--font-body);
    transition: border-color var(--transition-fast);
}

.form-input::placeholder {
    color: var(--color-placeholder);
}

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

.newsletter-form .form-group {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
    justify-content: flex-end;
}

.newsletter-form input[type="email"] {
    padding: 0.4rem 0.75rem;
    font-size: var(--font-size-small);
    width: 160px;
}

.newsletter-form button {
    padding: 0.4rem 0;
    background-color: transparent;
    color: var(--color-accent);
    border: none;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: var(--font-size-small);
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.newsletter-form button:hover {
    opacity: 0.8;
}

.form-message {
    margin-top: var(--spacing-xs);
}

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

.form-message.error {
    color: var(--color-error-light);
}

/* Honeypot field - hidden from humans */
.hp-field {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    width: 0;
    pointer-events: none;
}

.footer-bottom {
    text-align: center;
    padding: 2px 0;
    color: var(--color-header-text);
    font-size: 0.65rem;
    line-height: 1;
}

.footer-bottom p {
    margin: 0;
    padding: 0;
    color: inherit;
}

@media (max-width: 768px) {
    .footer-top {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-brand {
        justify-content: center;
    }

    .footer-links {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
    }

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

    .newsletter-form .form-group {
        flex-direction: column;
        align-items: center;
    }

    .newsletter-form input[type="email"] {
        width: 100%;
        max-width: 300px;
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
/* Shared hero styles */
.hero, .blog-hero {
    padding: var(--spacing-md) 0 var(--spacing-md);
    background-color: var(--color-bg-primary);
}

.hero h1, .blog-hero h1 {
    margin-bottom: var(--spacing-xs);
}


/* Homepage hero specifics */
.hero {
    text-align: center;
}

.hero-content {
    max-width: var(--content-width-medium);
    margin: 0 auto;
}

/* Blog page hero specifics */
.blog-hero p {
    font-size: var(--font-size-small);
    max-width: var(--content-width-medium);
}

.blog-hero .hero-features {
    font-size: var(--font-size-small);
}


/* --------------------------------------------------------------------------
   Section Titles
   -------------------------------------------------------------------------- */
.section-title {
    margin-bottom: var(--spacing-md);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.section-header .btn {
    font-size: var(--font-size-small);
    padding: 0.5rem 1.25rem;
}

/* --------------------------------------------------------------------------
   Cards (shared base styles)
   -------------------------------------------------------------------------- */
.card {
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
    transform: translateY(-2px);
}

.card img {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
    display: block;
}

.card-title {
    line-height: 1.4;
    margin: 0;
}

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

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

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

/* --------------------------------------------------------------------------
   Blog Cards
   -------------------------------------------------------------------------- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 992px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

.blog-card {
    background-color: var(--color-bg-card);
}

.blog-card-image {
    display: block;
    overflow: hidden;
    background-color: var(--color-bg-secondary);
}

.blog-card-image img {
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.03);
}

.blog-card-content {
    padding: var(--spacing-sm) 0;
}

.blog-card-meta {
    display: flex;
    gap: var(--spacing-sm);
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-xs);
}

.blog-card-title {
    margin-bottom: var(--spacing-xs);
}

.blog-card-excerpt {
    font-size: var(--font-size-small);
    margin-bottom: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-sm);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.pagination a {
    color: var(--color-text-secondary);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
}

.pagination a:hover {
    background-color: var(--color-bg-card-hover);
    color: var(--color-text-primary);
}

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

.pagination .disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   Reading Progress Bar
   -------------------------------------------------------------------------- */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-bright) 100%);
    z-index: 9999;
    transition: width 0.1s ease-out;
}

/* --------------------------------------------------------------------------
   Blog Post (Single)
   -------------------------------------------------------------------------- */
.blog-post {
    max-width: var(--content-width-narrow);
    margin: 0 auto;
    padding: var(--spacing-md) var(--container-padding);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.blog-post-header {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-accent);
}

.blog-post-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-small);
}

.blog-post-author .author-name {
    color: var(--color-text-primary);
    font-weight: 500;
}

.blog-post-author .post-date {
    color: var(--color-text-muted);
}

.blog-post-author .post-date::before {
    content: '·';
    margin-right: var(--spacing-xs);
}

.blog-post-title {
    margin-bottom: 0;
    line-height: 1.2;
    font-weight: 700;
}

/* Drop cap on first paragraph */
.blog-post-content > p:first-of-type::first-letter {
    float: left;
    font-size: 3.5rem;
    line-height: 1;
    font-weight: 700;
    color: var(--color-accent);
    margin-right: 0.5rem;
    margin-top: 0.1rem;
}

.blog-post-content h2 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.blog-post-content h3 {
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}


.blog-post-content a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid var(--color-accent);
    transition: border-color var(--transition-fast);
}

.blog-post-content a:hover {
    color: var(--color-accent-hover);
    border-bottom-color: transparent;
}

.blog-post-content img {
    border-radius: var(--radius-md);
    margin: var(--spacing-sm) 0;
}

/* Modern blockquote styling */
.blog-post-content blockquote {
    position: relative;
    border: none;
    background: linear-gradient(135deg, rgba(0, 192, 212, 0.08) 0%, rgba(0, 192, 212, 0.03) 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-md) 0;
    font-style: normal;
    font-weight: 500;
    color: var(--color-text-primary);
}

.blog-post-content blockquote::before {
    content: '"';
    position: absolute;
    left: 0.5rem;
    top: 0.25rem;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    font-family: Georgia, serif;
}

.blog-post-content blockquote cite {
    display: block;
    font-size: var(--font-size-small);
    font-style: italic;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

.blog-post-content ul,
.blog-post-content ol {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
}

.blog-post-content li {
    margin-bottom: 0.35rem;
    position: relative;
}

/* Styled list markers */
.blog-post-content ul li::marker {
    color: var(--color-accent);
}

.blog-post-content ol li::marker {
    color: var(--color-accent);
    font-weight: 600;
}

/* Related Posts Section */
.related-posts {
    max-width: var(--content-width-narrow);
    margin: 0 auto;
    padding: var(--spacing-md) var(--container-padding) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.related-posts h2 {
    margin-bottom: var(--spacing-sm);
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.related-post-card {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.related-post-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.related-post-card-content {
    padding: var(--spacing-sm);
}

.related-post-card-title {
    font-size: var(--font-size-small);
    line-height: 1.3;
}

.related-post-card-meta {
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

@media (max-width: 768px) {
    .related-posts-grid {
        grid-template-columns: 1fr;
    }
}


/* --------------------------------------------------------------------------
   Page Content (About, Contact, etc.)
   -------------------------------------------------------------------------- */
.page-content {
    max-width: var(--content-width-medium);
    margin: 0 auto;
    padding: var(--spacing-md) var(--container-padding) 0;
}


.page-content h2,
.about-content h2 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}


.page-content ul,
.page-content ol {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.page-content li {
    margin-bottom: var(--spacing-xs);
}

.page-content a {
    color: var(--color-accent);
    text-decoration: underline;
}

.page-content a:hover {
    color: var(--color-accent-hover);
}

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

/* --------------------------------------------------------------------------
   Contact Form
   -------------------------------------------------------------------------- */
.contact-section {
    max-width: var(--content-width-medium);
    margin: 0 auto;
    padding: var(--spacing-md) 0;
}

.contact-intro {
    text-align: center;
    margin-bottom: var(--spacing-md);
}



.contact-form-card {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    margin: 0 auto;
    max-width: var(--content-width-medium);
}

.contact-form-card h2 {
    text-align: center;
    font-style: italic;
    margin-bottom: var(--spacing-sm);
    font-weight: 400;
}

.contact-form {
    max-width: var(--content-width-narrow);
    margin: 0 auto;
}

.contact-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

@media (max-width: 768px) {
    .contact-form .form-row {
        grid-template-columns: 1fr;
    }
}

.contact-form .form-group {
    margin-bottom: var(--spacing-sm);
}

.contact-form label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 400;
    font-size: var(--font-size-small);
    color: var(--color-text-primary);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
}

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

.contact-form .form-actions {
    text-align: center;
    margin-top: var(--spacing-md);
}

.contact-form button {
    padding: 0.75rem 3rem;
    background-color: var(--color-accent);
    color: white;
    border: none;
    border-radius: 25px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.contact-form button:hover {
    background-color: var(--color-accent-hover);
}

/* --------------------------------------------------------------------------
   404 Page
   -------------------------------------------------------------------------- */
.error-page {
    text-align: center;
    padding: var(--spacing-2xl) var(--container-padding);
}

.error-page h1 {
    font-size: 6rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.error-page h2 {
    margin-bottom: var(--spacing-xs);
}


.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background-color: var(--color-accent);
    color: white;
    border-radius: 25px;
    font-weight: 500;
    font-size: var(--font-size-small);
    transition: background-color var(--transition-fast);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    margin-left: var(--spacing-sm);
}

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

/* --------------------------------------------------------------------------
   About Page
   -------------------------------------------------------------------------- */
.about-content {
    max-width: var(--content-width-medium);
    margin: 0 auto;
    padding: var(--spacing-md) var(--container-padding) 0;
}


.about-content h1 span {
    display: block;
}

.about-content h1 .about-tagline {
    text-align: right;
    margin-top: var(--spacing-sm);
}



.about-contact-section {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-md) 0;
    border-top: 3px solid var(--color-accent);
}

.about-contact-content {
    max-width: var(--content-width-medium);
    margin: 0 auto;
    text-align: center;
}

.about-contact-content h2 {
    margin-bottom: var(--spacing-xs);
}


/* Feature checklist in hero sections */
.hero-features {
    margin-top: var(--spacing-sm);
}