/* Terra-Vital Engineering - W142 產業展示網站樣式 */
:root {
    --primary-brown: #3E2723; /* 深培腐植土 */
    --accent-green: #689F38;  /* 光合脈動綠 */
    --mineral-yellow: #FBC02D; /* 礦質矽砂黃 */
    --water-blue: #4FC3F7;    /* 潔淨循環水 */
    --text-light: #F5F5F5;
    --text-dark: #212121;
    --bg-light: #FAFAFA;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
}

.mono-font {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* 導覽列樣式 */
.navbar {
    background-color: rgba(62, 39, 35, 0.95) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--accent-green);
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--accent-green) !important;
}

.nav-link {
    color: var(--text-light) !important;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--accent-green) !important;
}

/* 按鈕樣式 */
.btn-terra {
    background-color: var(--accent-green);
    color: white;
    border-radius: 0;
    padding: 10px 25px;
    font-weight: 600;
    border: none;
    transition: all 0.3s;
}

.btn-terra:hover {
    background-color: #558B2F;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(104, 159, 56, 0.3);
}

/* 區塊標題 */
.section-title {
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 40px;
    font-weight: 800;
    color: var(--primary-brown);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background-color: var(--accent-green);
}

/* 頁尾樣式 */
footer {
    background-color: var(--primary-brown);
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-logo {
    color: var(--accent-green);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.footer-link {
    color: #BDBDBD;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-link:hover {
    color: var(--accent-green);
}

/* 共通動畫 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}