/* --- styles.css (Final Presentation Version) --- */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;700&display=swap');

:root {
    --bg-primary: #FFFFFF;
    --bg-alternate: #F9F9FC;
    --text-primary: #131212;
    --text-secondary: #222121;
    --text-muted: #888888;
    --border-color: rgba(0, 0, 0, 0.08);
    --pastel-accent-one: #c3aed6; /* Softer Lavender */
    --pastel-accent-two: #f2c6de; /* Softer Pink */
    --glow-color: rgba(195, 174, 214, 0.3);

    --font-primary: 'Outfit', sans-serif;
    --navbar-height: 70px;
    --border-radius: 16px;
    --transition-speed: 0.3s;
}

/* --- Base & Scrollbar --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--navbar-height); }
body { font-family: var(--font-primary); background-color: var(--bg-primary); color: var(--text-primary); line-height: 1.7; overflow-x: hidden; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-alternate); }
::-webkit-scrollbar-thumb { background: var(--pastel-accent-one); border-radius: 4px; }

/* --- Layout & Typography --- */
.container { width: 90%; max-width: 1100px; margin: 0 auto; padding: 0 15px; }
.content-section { padding: 100px 0; }
.content-section.alternate-bg { background-color: var(--bg-alternate); }
.section-title { text-align: center; font-size: clamp(2.2rem, 4vw, 3rem); font-weight: 700; margin-bottom: 20px; position: relative; padding-bottom: 15px; text-wrap: balance; }
.section-title::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 80px; height: 4px; background: linear-gradient(90deg, var(--pastel-accent-one), var(--pastel-accent-two)); border-radius: 2px; }
.section-subtitle { text-align: center; max-width: 700px; margin: -10px auto 60px auto; color: var(--text-secondary); font-size: 1.1rem; }
h3 { font-size: clamp(1.5rem, 3vw, 1.9rem); margin-top: 3rem; margin-bottom: 1.5rem; font-weight: 600; }
p, ul { color: var(--text-secondary); font-size: 1.1rem; line-height: 1.8; margin-bottom: 1.2rem; }
ul { list-style-position: outside; padding-left: 20px; }
a { color: var(--pastel-accent-one); text-decoration: none; font-weight: 500; transition: color var(--transition-speed); }
a:hover { color: var(--pastel-accent-two); }

/* --- Navbar --- */
.navbar { position: fixed; top: 0; left: 0; width: 100%; background-color: rgba(255, 255, 255, 0.7); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); padding: 0.8rem 0; z-index: 1000; height: var(--navbar-height); display: flex; align-items: center; border-bottom: 1px solid transparent; transition: background-color var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed); }
.navbar.scrolled { background-color: rgba(255, 255, 255, 0.85); border-color: var(--border-color); box-shadow: 0 2px 20px rgba(0,0,0,0.05); }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.8rem; font-weight: 700; }
.nav-links { list-style: none; display: flex; align-items: center; gap: 1.5rem; }
.cta-button-nav { background: linear-gradient(90deg, var(--pastel-accent-one), var(--pastel-accent-two)); color: white !important; padding: 0.6rem 1.2rem; border-radius: var(--border-radius); font-weight: 500; transition: transform var(--transition-speed), box-shadow var(--transition-speed); border: none; background-size: 200% auto; }
.cta-button-nav:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.1); background-position: right center; }

/* --- Hero Section --- */
.hero-section { height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; position: relative; overflow: hidden; background: linear-gradient(135deg, #f5d0e4, #c3aed6); }
#threejs-canvas-container { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; }
.hero-content { position: relative; z-index: 2; padding: 2rem; background: rgba(0,0,0,0.1); border-radius: var(--border-radius); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.1); }
.hero-content h1 { text-shadow: 0 2px 10px rgba(0,0,0,0.2); font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700; margin-bottom: 1.5rem; line-height: 1.1; letter-spacing: -2px; color: white; }
.cta-button { display: inline-block; background: white; color: var(--text-primary); padding: 1rem 2.5rem; text-decoration: none; font-size: 1.1rem; font-weight: 500; border-radius: 50px; transition: transform var(--transition-speed), box-shadow var(--transition-speed); box-shadow: 0 5px 20px rgba(0,0,0,0.1); border: none; cursor: pointer; }
.cta-button:hover { transform: translateY(-4px) scale(1.03); box-shadow: 0 8px 30px rgba(0,0,0,0.15); }

/* --- Main Content Containers & Cards --- */
.overview-container, .rvc-container, .results-container, .conclusion-container, .eda-container { max-width: 800px; margin: 0 auto; }
.content-image { width: 100%; height: auto; border-radius: var(--border-radius); }
.interactive-card { perspective: 1000px; background: var(--bg-primary); padding: 30px; border-radius: var(--border-radius); border: 1px solid var(--border-color); box-shadow: 0 4px 15px rgba(0,0,0,0.05); will-change: transform; transition: transform 0.1s linear, box-shadow var(--transition-speed) ease; }
.interactive-card:not(:last-child) { margin-bottom: 40px; }
.interactive-card:hover { transform: translateY(-5px); box-shadow: 0 10px 30px var(--glow-color); }
.caption { text-align: center; font-size: 0.9rem; color: var(--text-muted); margin: 15px 0 0 0; }

/* --- FIXED CARD LAYOUTS --- */
.eda-grid, .results-grid { display: grid; grid-template-columns: 1fr; gap: 40px; margin-top: 40px; }
.audio-grid { display: grid; grid-template-columns: 1fr; gap: 15px; margin-top: 2rem; }
.audio-grid div { background-color: var(--bg-alternate); padding: 15px; border-radius: 8px; border: 1px solid var(--border-color); }
audio { width: 100%; }

/* --- Code Highlighting --- */
.code-block { margin: 2rem 0; border-radius: var(--border-radius); overflow: hidden; box-shadow: 0 5px 20px rgba(0,0,0,0.1); }
pre[class*="language-"] { padding: 1.5em; margin: 0; font-size: 0.9em; line-height: 1.6; }

/* --- Resources & Footer --- */
.columns-container { display: flex; gap: 40px; flex-wrap: wrap; }
.column { flex: 1; min-width: 300px; }
.project-links-container { display: flex; flex-direction: column; gap: 15px; }
.project-link.cta-button { width: 100%; text-align: center; background: var(--bg-alternate); color: var(--text-primary); border: 1px solid var(--border-color); box-shadow: none; font-size: 1rem; padding: 0.8rem 1.5rem; }
.footer { background-color: #1a1a1a; color: #aab2bd; text-align: center; padding: 40px 0; margin-top: 50px; }

/* --- Responsive Adjustments --- */
@media (max-width: 768px) { .navbar { height: auto; } .navbar .container { flex-direction: column; padding: 10px 0; } .nav-links { margin-top: 10px; } html { scroll-padding-top: 120px; } }