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

:root {
    --bg-color: #050a14;
    --panel-bg: rgba(10, 20, 40, 0.85);
    --cyan: #00ffff;
    --dark-blue: #003366;
    --green: #00ff66;
    --yellow: #ffff00;
    --orange: #ff9900;
    --red: #ff3333;
    --text-main: #e0f2fe;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Rajdhani', sans-serif;
    overflow-x: hidden;
}

.hidden { display: none !important; }
.page-section { padding: 20px; padding-top: 80px; min-height: calc(100vh - 60px); }

/* ================= ALARM BANNER ================= */
#alarm-banner {
    position: fixed;
    top: 60px; left: 0; width: 100%;
    background: rgba(255, 0, 0, 0.95);
    color: white;
    text-align: center;
    padding: 10px;
    font-size: 1.3rem;
    font-family: 'Orbitron', sans-serif;
    z-index: 9998;
    border-bottom: 2px solid #ffaaaa;
    box-shadow: 0 0 20px rgba(255,0,0,0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
}
.blink-icon { animation: blink 0.5s infinite; }

/* ================= NAVIGATION ================= */
#top-nav {
    position: fixed; top: 0; left: 0; width: 100%; height: 60px;
    background: rgba(5, 10, 20, 0.95); border-bottom: 2px solid var(--cyan);
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 30px; z-index: 9999; backdrop-filter: blur(10px);
}
.nav-brand { font-family: 'Orbitron', sans-serif; font-size: 1.5rem; color: var(--cyan); }
.nav-menu { display: flex; gap: 10px; }
.nav-btn {
    background: transparent; border: 1px solid transparent; color: var(--text-main);
    padding: 8px 15px; font-family: 'Orbitron', sans-serif; font-size: 0.95rem;
    cursor: pointer; transition: 0.3s; border-radius: 4px;
}
.nav-btn:hover { border: 1px solid var(--cyan); color: var(--cyan); }
.nav-btn.active { background: rgba(0,255,255,0.15); border: 1px solid var(--cyan); color: var(--cyan); }

/* ================= LANDING PAGE ================= */
#landing-page {
    height: 100vh; display: flex; justify-content: center; align-items: center;
    background: radial-gradient(circle at center, #0a1128 0%, #02040a 100%); text-align: center; position: relative;
}
.glitch { font-family: 'Orbitron', sans-serif; font-size: 4.5rem; color: var(--cyan); text-shadow: 0 0 15px var(--cyan); margin-bottom: 5px; }
.subtitle { font-size: 2rem; color: var(--green); letter-spacing: 3px; margin-bottom: 10px; }
#btn-enter {
    margin-top: 30px; background: transparent; border: 2px solid var(--cyan); color: var(--cyan);
    padding: 15px 40px; font-size: 1.2rem; font-family: 'Orbitron', sans-serif; cursor: pointer; transition: 0.3s; border-radius: 5px;
}
#btn-enter:hover { background: var(--cyan); color: var(--bg-color); box-shadow: 0 0 20px var(--cyan); }
.credit-text { margin-top: 40px; font-size: 0.85rem; color: rgba(255,255,255,0.4); letter-spacing: 2px; }

/* ================= DUAL ANIMATION PANEL ================= */
.dual-anim-panel {
    display: flex; gap: 20px; margin-bottom: 20px;
}
.anim-box {
    background: rgba(0,0,0,0.5); border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 10px; padding: 15px; position: relative; overflow: hidden;
}
.anim-box h4 {
    font-family: 'Orbitron', sans-serif; color: var(--cyan); border-bottom: 1px solid rgba(0,255,255,0.2);
    padding-bottom: 8px; margin-bottom: 15px; font-size: 1rem;
}
/* RAIL VISUALIZATION */
.rail-box { flex: 1; min-height: 160px; display: flex; flex-direction: column; }
.rail-container {
    flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; padding-bottom: 10px;
}
.rail-cross-section {
    display: flex; flex-direction: column; align-items: center;
    transform-origin: bottom center;
    transition: transform 0.2s linear;
}
.r-head { width: 45px; height: 18px; background: #888; border-radius: 5px 5px 0 0; transition: background 0.3s, box-shadow 0.3s; }
.r-web { width: 12px; height: 45px; background: #888; transition: background 0.3s, box-shadow 0.3s; }
.r-foot { width: 60px; height: 15px; background: #888; border-radius: 2px; transition: background 0.3s, box-shadow 0.3s; }
.rail-ground { width: 80%; height: 4px; background: #444; border-radius: 2px; margin-top: 2px; }

/* TRAIN VISUALIZATION */
.train-box { flex: 2; min-height: 160px; display: flex; flex-direction: column; justify-content: flex-end; padding-bottom: 25px; }
.atp-status {
    position: absolute; top: 15px; right: 15px; font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem; padding: 5px 10px; border-radius: 5px; background: rgba(0,255,102,0.2);
    color: var(--green); border: 1px solid var(--green); transition: 0.3s;
}
.atp-active { background: rgba(255,51,51,0.2); color: var(--red); border-color: var(--red); animation: blink 0.5s infinite; }
.rail-track { width: 100%; height: 4px; background: #555; position: absolute; bottom: 25px; box-shadow: 0 0 8px var(--cyan); }
.train { position: absolute; bottom: 29px; left: -300px; display: flex; animation: trainMove linear infinite; animation-play-state: paused; }
.train-head { width: 70px; height: 45px; background: var(--cyan); border-radius: 0 25px 0 0; box-shadow: 0 0 15px var(--cyan); position: relative; }
.train-head::after { content: ''; position: absolute; right: -40px; top: 20px; width: 60px; height: 20px; background: linear-gradient(90deg, rgba(255,255,255,0.8), transparent); border-radius: 50%; }
.train-body { width: 90px; height: 45px; background: var(--dark-blue); margin-left: 5px; border: 1px solid var(--cyan); border-radius: 2px; }
@keyframes trainMove { 0% { transform: translateX(0); left: -300px; } 100% { transform: translateX(100vw); left: 100%; } }

/* SIMULATION CONTROL */
.sim-control-wrapper { text-align: center; margin-bottom: 25px; }
#btn-sim-toggle {
    background: rgba(0,255,102,0.1); border: 2px solid var(--green); color: var(--green);
    padding: 12px 30px; font-size: 1.2rem; font-family: 'Orbitron', sans-serif; cursor: pointer;
    border-radius: 30px; transition: 0.3s; box-shadow: 0 0 15px rgba(0,255,102,0.2);
}
#btn-sim-toggle:hover { background: var(--green); color: var(--bg-color); }
#btn-sim-toggle.sim-active {
    background: rgba(255,51,51,0.1); border: 2px solid var(--red); color: var(--red); box-shadow: 0 0 15px rgba(255,51,51,0.2);
}
#btn-sim-toggle.sim-active:hover { background: var(--red); color: white; }

/* DASHBOARD GRID & CONTROLS */
.dashboard-grid { display: grid; grid-template-columns: 1fr 2fr 1fr; grid-gap: 20px; }
.panel { background: var(--panel-bg); border: 1px solid rgba(0, 255, 255, 0.2); border-radius: 10px; padding: 20px; }
.panel h3 { font-family: 'Orbitron', sans-serif; color: var(--cyan); margin-bottom: 15px; border-bottom: 1px solid rgba(0,255,255,0.2); padding-bottom: 10px; }
.panel-desc { font-size: 0.85rem; color: #aaa; margin-bottom: 15px; }
.input-category { color: #8ab4f8; font-size: 0.9rem; text-transform: uppercase; margin-bottom: 10px; margin-top: 15px; letter-spacing: 1px; }

/* SLIDERS */
.slider-group { margin-bottom: 15px; }
.slider-group label { display: block; margin-bottom: 5px; font-weight: bold; color: #ccc; font-size: 0.95rem;}
.val-highlight { color: var(--cyan); font-family: 'Orbitron', sans-serif; font-size: 1.1rem; }
input[type=range] { -webkit-appearance: none; width: 100%; background: transparent; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; height: 18px; width: 18px; border-radius: 50%; background: var(--cyan); cursor: pointer; margin-top: -6px; box-shadow: 0 0 10px var(--cyan); }
input[type=range]::-webkit-slider-runnable-track { width: 100%; height: 6px; cursor: pointer; background: rgba(0,255,255,0.2); border-radius: 3px; border: 1px solid rgba(0,255,255,0.5); }

/* SENSOR CARDS */
.sensor-grid { display: grid; grid-template-columns: 1fr 1fr; grid-gap: 15px; }
.card { background: rgba(0, 0, 0, 0.6); border: 1px solid rgba(0,255,255,0.3); border-radius: 8px; padding: 15px; display: flex; align-items: center; transition: 0.3s; }
.card-icon { font-size: 2.5rem; color: var(--cyan); margin-right: 15px; width: 40px; text-align: center; }
.card-info h2 { font-family: 'Orbitron', sans-serif; font-size: 1.8rem; margin: 3px 0; }
.card-info p { font-size: 0.9rem; color: #ccc; }
.status { font-weight: bold; padding: 3px 8px; border-radius: 4px; font-size: 0.8rem; display: inline-block; }
.green { background: rgba(0,255,102,0.2); color: var(--green); border: 1px solid var(--green); }
.red { background: rgba(255,51,51,0.2); color: var(--red); border: 1px solid var(--red); box-shadow: 0 0 10px var(--red); }
.orange { background: rgba(255,153,0,0.2); color: var(--orange); border: 1px solid var(--orange); }

/* RHI GAUGE */
.gauge-container { display: flex; justify-content: center; align-items: center; position: relative; height: 230px; }
.circular-chart { display: block; margin: 0 auto; max-width: 90%; max-height: 230px; }
.circle-bg { fill: none; stroke: rgba(255, 255, 255, 0.05); stroke-width: 3.8; }
.circle { fill: none; stroke-width: 2.8; stroke-linecap: round; transition: stroke-dasharray 0.5s ease-out, stroke 0.5s; stroke: var(--green); }
.gauge-text { position: absolute; text-align: center; }
#rhi-value { font-family: 'Orbitron', sans-serif; font-size: 3rem; font-weight: bold; }
#rhi-category { font-size: 1.1rem; font-weight: bold; letter-spacing: 2px; }
.cat-excellent { color: var(--green); } .cat-good { color: var(--cyan); } .cat-warning { color: var(--orange); } .cat-critical { color: var(--red); }

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ================= HISTORY SECTION ================= */
.history-panel { min-height: 80vh; }
.history-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid rgba(0,255,255,0.2); margin-bottom: 15px; padding-bottom: 10px; }
.history-header h3 { border: none; margin: 0; padding: 0; }
.btn-clear { background: rgba(255,51,51,0.2); border: 1px solid var(--red); color: var(--red); padding: 8px 15px; border-radius: 5px; cursor: pointer; font-family: 'Orbitron', sans-serif; transition: 0.3s; }
.btn-clear:hover { background: var(--red); color: white; }
.table-container { width: 100%; overflow-x: auto; background: rgba(0,0,0,0.4); border-radius: 8px; border: 1px solid rgba(0,255,255,0.3); }
table { width: 100%; border-collapse: collapse; font-size: 1rem; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid rgba(0,255,255,0.1); }
th { background: rgba(0,255,255,0.1); color: var(--cyan); font-family: 'Orbitron', sans-serif; font-size: 0.9rem; }
tr:hover { background: rgba(0,255,255,0.05); }
.risk-col { width: 35%; color: #ffcccc; line-height: 1.4; font-size: 0.95rem; }
.badge { display: inline-block; padding: 3px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: bold; margin: 2px; }
.badge-danger { background: rgba(255,51,51,0.2); border: 1px solid var(--red); color: var(--red); }

footer { text-align: center; color: rgba(255,255,255,0.4); padding: 15px; border-top: 1px solid rgba(0,255,255,0.2); margin-top: 20px;}
.credit-text-footer { font-size: 0.8rem; margin-top: 5px; color: #666; letter-spacing: 1px; }

@media(max-width: 1200px) { .dashboard-grid { grid-template-columns: 1fr; } .dual-anim-panel { flex-direction: column; } }