@import url('https://fonts.googleapis.com/css2?family=Lato:wght@300;400;700&display=swap');

/* 2. Global Styles & Color Palette */
:root {
    --dark-blue-gray: #2C3E50; /* For headers, footers, and main headings */
    --calm-blue: #3498DB;      /* For links and interactive elements */
    --silver: #BDC3C7;         /* A lighter gray for accents or secondary text */
    --light-gray-bg: #F0F4F8; /* The fallback background color */
    --white: #FFFFFF;          /* The background for our main content sections */
    --body-text-color: #5D6D7E;/* A soft gray for paragraph text */
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Lato', sans-serif;
    color: var(--body-text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    text-align: center;
    /* The Flowing Ether background */
    background: linear-gradient(-45deg, #F0F4F8, #dde4eb, #caced1, #F0F4F8);
    background-size: 400% 400%;
    animation: gradientFlow 15s ease infinite;
}

/* 3. Header, Footer, & Navigation */
header {
    background-image: url('header-banner.jpg');
    background-size: cover;
    background-position: center;
    height: 40vh;
    padding: 0;
    border-top: 8px solid var(--dark-blue-gray);
    border-bottom: 8px solid var(--dark-blue-gray);
}

nav {
    background-color: var(--white);
    padding: 1rem;
    border-bottom: 1px solid #dee4e9;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: var(--dark-blue-gray);
    font-weight: 700;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

nav a:hover {
    color: var(--calm-blue);
    border-bottom-color: var(--calm-blue);
}

footer {
    background-color: var(--dark-blue-gray);
    color: var(--light-gray-bg);
    padding: 1.5rem;
    font-size: 0.9rem;
}

footer em {
    color: var(--silver);
}

/* 4. Main Content & Sections */
main {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

section {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: left;
}

section h2, section h3 {
    color: var(--dark-blue-gray);
    margin-top: 0;
}

section h2 {
    text-align: center;
    font-size: 2rem;
}

section h3 {
    font-size: 1.5rem;
}

/* 5. Article Page Styles */
.article-container {
    padding: 0;
}

.page-title {
    text-align: center;
    border-bottom: 1px solid #dee4e9;
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
}

article {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

article:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.08);
}

article h3 {
    margin-top: 0;
    color: var(--dark-blue-gray);
    font-size: 1.8rem;
}

.meta-data {
    font-size: 0.9rem;
    color: var(--silver);
    font-style: italic;
    margin-top: -1rem;
    margin-bottom: 2rem;
}

article p {
    line-height: 1.7;
}

/* 6. Animations & Interactive Sparkle */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

main section, 
main article {
    animation: fadeIn 0.8s ease-out forwards;
}

@keyframes gradientFlow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* --- 9. Flowing Wave Background --- */

.wave-container {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 15vh;
    z-index: -1; /* Puts the waves behind all other content */
}

.waves {
    position: relative;
    width: 100%;
    height: 15vh;
    margin-bottom: -7px; /* Fix for slight gap */
}

.parallax > use {
    animation: move-forever 25s cubic-bezier(.55,.5,.45,.5) infinite;
}

.parallax > use:nth-child(1) {
    animation-delay: -2s;
    animation-duration: 7s; /* Slowest wave on top */
}

.parallax > use:nth-child(2) {
    animation-delay: -3s;
    animation-duration: 10s;
}

.parallax > use:nth-child(3) {
    animation-delay: -4s;
    animation-duration: 13s;
}

.parallax > use:nth-child(4) {
    animation-delay: -5s;
    animation-duration: 20s; /* Fastest wave in the back */
}

/* This is the animation that moves the waves horizontally */
@keyframes move-forever {
    0% {
        transform: translate3d(-90px,0,0);
    }
    100% { 
        transform: translate3d(85px,0,0);
    }
}

/* REPLACE the old .article-image rule with this one */
.article-image {
    width: 100%;
    max-width: 600px;
    display: inline-block; /* Changed from block */
    vertical-align: middle;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    margin: 0; /* Removed margin */
}

/* --- 11. Figure and Caption Styling --- */

/* This replaces the old .image-wrapper for better semantics */
.article-figure {
    text-align: center;
    margin: 2rem 0; 
}

/* This styles the visible caption text below the image */
figcaption {
    padding: 0.8rem;
    font-size: 0.9rem;
    font-style: italic;
    color: var(--body-text-color);
}