/* 1. Visual Identity & Palette */
:root {
    --primary-base: #0B1A13; /* Deep Forest / Dark Green */
    --accent-glow: #87CEEB; /* Sky Blue / Cyan Glow (Alternative: #A0D2EB) */
    --text-light: #E0F2E9; /* Soft light green-white for readable text */
    --text-muted: rgba(224, 242, 233, 0.7);
    --line-thickness: 1px;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--primary-base);
    color: var(--text-light);
    overflow-x: hidden;
    /* Full-Viewport Fade-and-Slide background implementation base */
    background: linear-gradient(to bottom, var(--primary-base) 0%, var(--primary-base) 100%);
    background-attachment: fixed;
    transition: background 1s ease-out;
}

/* Base Gradient overlay shifting */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    /* Richer sky blue bleed */
    background: linear-gradient(to top, rgba(135, 206, 235, 0.4) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.5s ease-out;
    /* We map scroll 0->100 to translateY 100%->0% */
    transform: translateY(calc(100% - var(--scroll-percent, 0%)));
    pointer-events: none;
    z-index: -1;
}

body.scrolled::before {
    opacity: 1;
}

/* 2. Core Design Pillars: "Two-Bump" Motif */
.corner-bird {
    position: fixed;
    width: 60px;
    height: 60px;
    z-index: 100;
    pointer-events: none;
    transition: transform 0.3s ease-out;
}

.bird-tl {
    top: 40px;
    left: 40px;
}

.bird-br {
    bottom: 40px;
    right: 40px;
    transform: scale(-1, -1); /* Flips it structurally to face corner properly if desired, or keep upright */
}

/* Subtle flapping animation tied to scroll */
@keyframes flap {
    0% { transform: scaleY(1); }
    50% { transform: scaleY(0.6); }
    100% { transform: scaleY(1); }
}

.flap-action path {
    animation: flap 0.4s ease-in-out;
    transform-origin: center;
}

/* 5. Content Layout */
.scroll-container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10vh 5vw;
    position: relative;
    opacity: 0.2;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.section.active {
    opacity: 1;
    transform: translateY(0);
}

.content-wrapper {
    max-width: 800px;
    width: 100%;
    text-align: center;
}

/* Typography */
h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    color: var(--text-light);
}

h2 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 300;
    margin-bottom: 2rem;
    color: var(--text-light);
}

p {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    font-weight: 300;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

/* Scroll Prompt */
.scroll-prompt {
    margin-top: 4rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    opacity: 0.6;
}

.scroll-prompt span {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.prompt-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent-glow), transparent);
}

/* Links List */
.portfolio-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.portfolio-links a {
    text-decoration: none;
    color: var(--text-light);
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    transition: color 0.3s ease, transform 0.3s ease;
}

.portfolio-links a:hover {
    color: var(--accent-glow);
    transform: translateX(10px);
}

.arrow {
    font-size: 0.8em;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    color: var(--accent-glow);
}

.portfolio-links a:hover .arrow {
    opacity: 1;
    transform: translateX(0);
}

.contact-link {
    display: inline-block;
    color: var(--accent-glow);
    text-decoration: none;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease;
    padding-bottom: 0.2rem;
}

.contact-link:hover {
    border-color: var(--accent-glow);
}

/* The Horizontal Line Strategy */
.horizontal-line-wrapper {
    width: 100%;
    height: var(--line-thickness);
    display: flex;
    justify-content: center;
    align-items: center;
}

.horizontal-line {
    width: 0%;
    height: 100%;
    background-color: var(--accent-glow);
    transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.horizontal-line.grow {
    width: 100%;
}

/* 6. Navigation Overlay */
.main-nav {
    position: fixed;
    top: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 200;
    display: flex;
    gap: 1.5rem;
    align-items: center;
    background: rgba(11, 26, 19, 0.6);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    border: 1px solid rgba(135, 206, 235, 0.2);
    backdrop-filter: blur(10px);
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active-nav {
    color: var(--accent-glow);
}

.nav-separator {
    color: var(--text-muted);
    opacity: 0.5;
    font-weight: 300;
}

/* 7. Blog Layout Specifics */
.blog-wrapper {
    text-align: left;
    max-width: 700px;
    margin: 0 auto;
}

.blog-entry {
    margin: 4rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.blog-date {
    font-size: 0.9rem;
    color: var(--accent-glow);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.blog-title {
    margin-bottom: 0.5rem;
}

.blog-title a {
    text-decoration: none;
    color: var(--text-light);
    transition: color 0.3s ease;
}

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

.blog-excerpt {
    margin: 0;
    margin-bottom: 1.5rem;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    text-decoration: none;
    font-size: 1rem;
    border-bottom: 1px solid var(--accent-glow);
    padding-bottom: 0.2rem;
    align-self: flex-start;
    transition: color 0.3s ease, gap 0.3s ease;
}

.read-more:hover {
    color: var(--accent-glow);
    gap: 0.8rem;
}

.read-more .arrow {
    opacity: 1;
    transform: none;
    transition: transform 0.3s ease;
}

.read-more:hover .arrow {
    transform: translateX(5px);
}

.blog-separator {
    opacity: 0.3; /* Softer lines between blog posts */
    margin: 2rem 0;
}

/* 8. Individual Article Layout */
.article-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
}

.article-header h1 {
    font-size: clamp(2.5rem, 6vw, 5rem);
    line-height: 1.1;
    margin-top: 1rem;
    margin-bottom: 2rem;
    text-align: left;
}

.article-wrapper {
    max-width: 680px; /* Optimal reading width */
    margin: 0 auto;
    text-align: left;
}

.article-wrapper p {
    margin-left: 0;
    margin-right: 0;
    margin-bottom: 2rem;
    max-width: 100%;
}

.article-wrapper a {
    color: var(--accent-glow);
    text-decoration: none;
    transition: box-shadow 0.3s ease;
    box-shadow: 0 1px 0 rgba(135, 206, 235, 0.4);
}

.article-wrapper a:hover {
    box-shadow: 0 1px 0 rgba(135, 206, 235, 1);
}

.article-wrapper h2 {
    font-size: 2rem;
    margin-top: 4rem;
    margin-bottom: 1.5rem;
    color: var(--accent-glow);
    text-align: left;
}

.back-link-wrapper {
    margin-top: 6rem;
    display: flex;
    justify-content: center;
    width: 100%;
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .corner-bird {
        width: 40px;
        height: 40px;
    }
    .bird-tl {
        top: 20px;
        left: 20px;
    }
    .bird-br {
        bottom: 20px;
        right: 20px;
    }
    .section {
        padding: 5vh 8vw;
    }
}