/**
 * @file main.css (微調宇宙深淵紫調版)
 */

:root {
  /* 保留原本深空底色並混入極深暗紫，建立色差深淵 */
  --bg-space-dark: #03020a;       
  --bg-abyss-purple: #0f0a21;     /* 新增：深淵紫核心層 */
  --text-stellar-white: #f5f5fa;  
  --text-nebula-gray: #a5a5c0;   
  --accent-star-glow: #7bb5ff;   /* 保留原有恆星藍 */
  --accent-nebula-purple: #a48cff; /* 新增：星雲紫高光點 */
  --font-studio-core: 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-studio-core);
  background-color: var(--bg-space-dark);
  color: var(--text-stellar-white);
  overflow-x: hidden;
}

/* 背景畫布：融合暗紫星團漸層 (Retuned Radial Color Space) */
#starfield-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 60% 40%, var(--bg-abyss-purple) 0%, var(--bg-space-dark) 100%);
}

.viewport-section {
  min-height: 100vh;
  width: 100vw;
  padding: 120px 10% 80px 10%;
  position: relative;
}

.section-title {
  font-size: 2.5rem;
  letter-spacing: 4px;
  margin-bottom: 3rem;
  color: var(--text-stellar-white);
  border-left: 4px solid var(--accent-nebula-purple); /* 標題左側條更換為星雲紫 */
  padding-left: 15px;
}

/* ==========================================================================
   需求 4: 頁尾元件基礎排版規範 (Studio Footer Specification)
   ========================================================================== */
.studio-footer {
  width: 100vw;
  padding: 4rem 10% 2rem 10%;
  background: rgba(3, 2, 10, 0.85);
  border-top: 1px solid rgba(164, 140, 255, 0.08); /* 紫光微弱分界線 */
  backdrop-filter: blur(8px);
  position: relative;
  z-index: 10;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
}

.footer-quote {
  font-size: 0.95rem;
  color: var(--accent-nebula-purple);
  font-style: italic;
  letter-spacing: 2px;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-nebula-gray);
  letter-spacing: 1px;
}