:root {
    --bg: #0d1117;
    --card: #161b22;
    --accent: #58a6ff;
    --text: #c9d1d9;
    --border: #30363d;
    --success: #238636;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    margin: 0;
    line-height: 1.6;
}

/* Navigation with Logo */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    height: 70px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-logo {
    height: 45px;
    width: auto;
    object-fit: contain;
}

nav ul { display: flex; list-style: none; gap: 25px; }
nav a { color: var(--text); text-decoration: none; font-size: 0.9rem; font-weight: 500; }
nav a:hover { color: var(--accent); }

/* Layout */
header { text-align: center; padding: 60px 20px; border-bottom: 1px solid var(--border); }
header h1 { margin: 0; color: #fff; }

main { max-width: 900px; margin: auto; padding: 20px; }

section {
    background: var(--card);
    margin: 30px 0;
    padding: 30px;
    border-radius: 10px;
    border: 1px solid var(--border);
}

h2 { font-size: 1.3rem; margin-top: 0; color: var(--accent); border-bottom: 1px solid var(--border); padding-bottom: 10px; }

/* Dashboard */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin-top: 20px; }
.stat-card { background: var(--bg); padding: 20px; border-radius: 8px; border: 1px solid var(--border); text-align: center; }

.progress-bar { background: #30363d; height: 8px; border-radius: 4px; margin: 15px 0; }
.progress-fill { background: var(--accent); height: 100%; border-radius: 4px; }

.data-circle { 
    width: 60px; height: 60px; border: 2px solid var(--success); border-radius: 50%; 
    line-height: 60px; margin: 10px auto; color: var(--success); font-weight: bold; 
}

/* Roadmap */
.roadmap-step { border-left: 3px solid var(--border); padding: 0 0 25px 25px; position: relative; }
.roadmap-step.completed { border-left-color: var(--success); }
.roadmap-step.current { border-left-color: var(--accent); }

/* Search & List */
.search-box input {
    width: 100%; padding: 12px; background: var(--bg); border: 1px solid var(--border);
    color: white; border-radius: 6px; margin-bottom: 20px; box-sizing: border-box;
}

ul#certList { list-style: none; padding: 0; }
ul#certList li { 
    display: flex; justify-content: space-between; padding: 15px 0; 
    border-bottom: 1px solid var(--border); font-size: 0.95rem; 
}
ul#certList li strong { color: var(--accent); font-family: monospace; }