/**
 * Kyvvu Website - Modern Professional Styles
 * Based on dashboard design patterns
 */

/* === CSS Variables === */
:root {
    --color-primary: #FF7700;
    --color-primary-hover: #EE6600;
    --color-primary-light: #FFF5E6;
    --color-text: #2c3e50;
    --color-text-light: #7f8c8d;
    --color-border: #e1e8ed;
    --color-background: #ffffff;
    --color-background-alt: #f8f9fa;
    --color-white: #ffffff;
    
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Courier New', monospace;
    
    --max-width-content: 1200px;
    --max-width-text: 800px;
    --spacing: 20px;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-background-alt);
    color: var(--color-text);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === Modern Top Navigation === */
.site-nav {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-wrapper {
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: opacity 0.2s;
}

.nav-brand:hover {
    opacity: 0.8;
}

.nav-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    transition: transform 0.2s ease;
}

.nav-brand:hover .nav-logo {
    transform: scale(1.05);
}

.nav-site-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 35px;
    align-items: center;
    list-style: none;
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.2s;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
}

/* === Page Container === */
.page-container {
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 60px 30px 100px;
}

.content-wrapper {
    max-width: var(--max-width-text);
    margin: 0 auto;
}

/* === Hero Section (Homepage) === */
.hero {
    text-align: center;
    padding: 80px 0 60px;
}

.hero-logo {
    width: 140px;
    height: 140px;
    margin: 0 auto 30px;
    display: block;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(255, 119, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-logo:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(255, 119, 0, 0.25);
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 15px;
    letter-spacing: -2px;
    line-height: 1;
}

.hero-tagline {
    font-size: 1.5rem;
    color: var(--color-text-light);
    font-weight: 400;
    margin-bottom: 40px;
    line-height: 1.5;
    min-height: 3rem;
}

.hero-tagline::after {
    content: '|';
    margin-left: 5px;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* === Typography === */
h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 20px;
    letter-spacing: -1px;
    line-height: 1.2;
}

h2 {
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 50px 0 25px 0;
    letter-spacing: -0.5px;
    line-height: 1.3;
}

h3 {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 35px 0 20px 0;
    line-height: 1.4;
}

p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--color-text);
    line-height: 1.8;
}

ul, ol {
    margin: 25px 0 25px 35px;
}

li {
    margin-bottom: 12px;
    font-size: 1.1rem;
    color: var(--color-text);
    line-height: 1.7;
}

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

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

strong {
    font-weight: 600;
    color: #1a1a1a;
}

code {
    background-color: var(--color-background-alt);
    padding: 3px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.9em;
    color: #e83e8c;
    border: 1px solid var(--color-border);
}

pre {
    background-color: #f6f8fa;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 25px 0;
    border: 1px solid var(--color-border);
}

pre code {
    background: none;
    padding: 0;
    color: var(--color-text);
    border: none;
}

blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: 25px;
    margin: 30px 0;
    color: var(--color-text-light);
    font-style: italic;
    font-size: 1.15rem;
}

/* === Highlight Boxes === */
.highlight-box {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, #ffffff 100%);
    padding: 30px;
    border-radius: 12px;
    margin: 35px 0;
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.contact-box {
    background-color: var(--color-background);
    padding: 25px 30px;
    border-radius: 8px;
    margin: 30px 0;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

/* === Blog List === */
.blog-list {
    list-style: none;
    margin: 40px 0;
    padding: 0;
}

.blog-post-item {
    background-color: var(--color-background);
    padding: 35px;
    margin-bottom: 30px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.blog-post-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.post-link {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    display: block;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    transition: color 0.2s;
}

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

.post-meta {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
    display: flex;
    gap: 15px;
    align-items: center;
}

.post-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.post-excerpt {
    margin-top: 15px;
    color: var(--color-text);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* === Blog Post Page === */
.post-header {
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--color-border);
}

.post-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 20px;
    letter-spacing: -2px;
    line-height: 1.1;
}

.post-content {
    font-size: 1.15rem;
    line-height: 1.8;
}

.post-content h2 {
    margin-top: 60px;
    margin-bottom: 25px;
}

.post-content h3 {
    margin-top: 40px;
    margin-bottom: 20px;
}

.post-content img {
    max-width: 100%;
    height: auto;
    margin: 40px 0;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.post-footer {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 25px;
}

.tag {
    display: inline-block;
    padding: 6px 16px;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 20px;
    font-size: 0.85rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    border: 1px solid transparent;
}

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

/* === Recent Posts Widget === */
.recent-posts {
    background-color: var(--color-background);
    padding: 35px;
    border-radius: 12px;
    margin: 50px 0;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.recent-posts h3 {
    margin-top: 0;
    margin-bottom: 25px;
    font-size: 1.4rem;
    color: var(--color-text);
}

.recent-posts ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.recent-posts li {
    margin-bottom: 18px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--color-border);
}

.recent-posts li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.recent-posts a {
    color: var(--color-text);
    font-weight: 500;
    font-size: 1.05rem;
    transition: color 0.2s;
}

.recent-posts a:hover {
    color: var(--color-primary);
}

.recent-posts .post-date {
    color: var(--color-text-light);
    font-size: 0.85rem;
    display: block;
    margin-top: 5px;
}

/* === Back Link === */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-primary);
    text-decoration: none;
    margin-bottom: 30px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s;
}

.back-link:hover {
    gap: 12px;
}

.back-link::before {
    content: '←';
    font-size: 1.2rem;
}

/* === Footer === */
.site-footer {
    background-color: var(--color-background);
    border-top: 1px solid var(--color-border);
    padding: 20px 0;
    margin-top: 80px;
}

.footer-content {
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 30px;
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-light);
    text-decoration: none;
    transition: color 0.2s;
    font-weight: 400;
    font-size: 0.85rem;
}

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

/* === Buttons === */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

.btn-secondary {
    background-color: var(--color-background);
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

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

/* === Responsive === */
@media (max-width: 968px) {
    .nav-wrapper {
        padding: 0 20px;
    }

    .page-container {
        padding: 40px 20px 80px;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--color-text);
        padding: 5px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        padding: 20px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 15px 0;
        width: 100%;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links a::after {
        display: none;
    }

    .hero {
        padding: 50px 0 40px;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-tagline {
        font-size: 1.2rem;
    }

    .hero-logo {
        width: 100px;
        height: 100px;
    }

    h1 {
        font-size: 2.2rem;
    }

    h2 {
        font-size: 1.8rem;
        margin: 40px 0 20px;
    }

    h3 {
        font-size: 1.4rem;
    }

    .post-title {
        font-size: 2.5rem;
    }

    .blog-post-item {
        padding: 25px;
    }

    .post-link {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .nav-wrapper {
        padding: 0 15px;
        height: 60px;
    }

    .nav-site-title {
        font-size: 1.2rem;
    }

    .nav-logo {
        width: 32px;
        height: 32px;
    }

    .page-container {
        padding: 30px 15px 60px;
    }

    .hero {
        padding: 30px 0;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-tagline {
        font-size: 1rem;
    }

    .hero-logo {
        width: 80px;
        height: 80px;
    }

    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.2rem;
    }

    p, li {
        font-size: 1rem;
    }

    .post-title {
        font-size: 2rem;
    }

    .post-content {
        font-size: 1rem;
    }

    .blog-post-item {
        padding: 20px;
    }

    .highlight-box,
    .contact-box,
    .recent-posts {
        padding: 20px;
    }
}

/* === Utility Classes === */
.text-center {
    text-align: center;
}

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

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 10px !important; }
.mt-2 { margin-top: 20px !important; }
.mt-3 { margin-top: 30px !important; }
.mt-4 { margin-top: 40px !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 10px !important; }
.mb-2 { margin-bottom: 20px !important; }
.mb-3 { margin-bottom: 30px !important; }
.mb-4 { margin-bottom: 40px !important; }