@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --success: #22c55e;
    --border: #334155;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.hidden { display: none !important; }
.active { display: block !important; }
.mt-20 { margin-top: 20px; }
.text-center { text-align: center; }

/* Navbar */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
}
.nav-brand { font-size: 1.5rem; font-weight: 700; }
.highlight { color: var(--accent); }
.nav-menu button {
    background: none;
    border: none;
    color: var(--text-primary);
    margin-left: 15px;
    cursor: pointer;
    font-weight: 600;
    transition: color 0.3s;
}
.nav-menu button:hover { color: var(--accent); }

/* Containers */
#app-container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}
.view-section { display: none; animation: fadeIn 0.4s ease-in; }

/* Cards */
.card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
}
.login-card { max-width: 400px; margin: auto; text-align: center; }
.content-card { max-width: 800px; margin: auto; }

/* Typography */
h1, h2, h3 { margin-bottom: 15px; }
p { margin-bottom: 15px; color: var(--text-secondary); }

/* Forms & Inputs */
input[type="text"], input[type="password"], select, textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-color);
    color: var(--text-primary);
    outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }

/* Password Container */
.pwd-container { display: flex; position: relative; }
#toggle-pwd {
    position: absolute; right: 10px; top: 12px;
    background: none; border: none; cursor: pointer; color: white;
}

/* Buttons */
button {
    padding: 10px 20px; border-radius: 6px; font-weight: 600;
    cursor: pointer; transition: 0.3s; border: none;
}
.btn-primary { background: var(--accent); color: #fff; width: 100%; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: transparent; border: 1px solid var(--accent); color: var(--accent); width: 100%; }
.btn-secondary:hover { background: rgba(56, 189, 248, 0.1); }
.btn-large { font-size: 1.1rem; padding: 15px 30px; }
hr { border: 0; height: 1px; background: var(--border); margin: 20px 0; }

/* Hero */
.hero { text-align: center; padding: 50px 0; }
.hero h1 { font-size: 2.5rem; }

/* Progress Bar */
.progress-bar { width: 100%; height: 8px; background: var(--border); border-radius: 4px; margin-bottom: 20px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); width: 33%; transition: width 0.3s; }

/* Materi & Visuals */
.materi-page { display: none; }
.info-card { background: rgba(56, 189, 248, 0.1); padding: 15px; border-left: 4px solid var(--accent); border-radius: 4px; margin-bottom: 15px; }

/* Flow Diagram (Piramida Terbalik) */
.flow-diagram { display: flex; flex-direction: column; align-items: center; margin: 20px 0; }
.box { background: var(--accent); color: #000; font-weight: bold; padding: 10px; margin: 2px 0; border-radius: 4px; text-align: center; }
.large { width: 100%; } .medium { width: 80%; background: #7dd3fc; } .normal { width: 60%; background: #bae6fd; } .small { width: 40%; background: #e0f2fe; }

/* Alur Visual CT */
.visual-alur { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 10px; }
.alur-item { background: var(--border); padding: 10px; border-radius: 8px; text-align: center; font-size: 0.9rem; }

/* Drag and Drop */
.dnd-wrapper { display: flex; flex-direction: column; gap: 15px; }
.dnd-source, .dnd-target { min-height: 100px; border: 2px dashed var(--border); padding: 10px; border-radius: 8px; background: rgba(0,0,0,0.2); }
.dnd-target { border-color: var(--accent); }
.drag-item { background: var(--card-bg); padding: 10px; margin-bottom: 5px; border: 1px solid var(--border); border-radius: 4px; cursor: grab; }
.placeholder-text { text-align: center; color: var(--text-secondary); }

/* Soal Evaluasi */
.question-block { margin-bottom: 20px; padding: 15px; background: rgba(255,255,255,0.05); border-radius: 8px; }
.question-block p { font-weight: bold; color: var(--text-primary); }

/* Score */
.score-display { font-size: 3rem; font-weight: bold; margin: 20px 0; }

/* Table Dashboard */
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px; border-bottom: 1px solid var(--border); text-align: left; }
th { background: rgba(56, 189, 248, 0.1); color: var(--accent); }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Nav Buttons */
.nav-buttons { display: flex; gap: 10px; margin-top: 20px; }