:root {
    --bg: #050a18;
    --card: #111b2d;
    --primary: #00f2ff;
    --secondary: #7000ff;
    --text: #ffffff;
    --border: #233554;
    --danger: #ff4d4d;
    --safe: #00ff88;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.app-wrapper {
    width: 100%;
    max-width: 600px;
    padding: 20px;
    text-align: center;
}

.brand {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--primary);
}

.tagline {
    color: #8892b0;
    margin-bottom: 40px;
}

.main-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.tab-container {
    display: flex;
    background: rgba(0,0,0,0.2);
}

.tab-link {
    flex: 1;
    padding: 15px;
    border: none;
    background: none;
    color: #8892b0;
    cursor: pointer;
    font-weight: 600;
    transition: 0.3s;
}

.tab-link.active {
    color: var(--primary);
    background: var(--card);
    border-bottom: 2px solid var(--primary);
}

.tab-panel {
    display: none;
    padding: 40px;
}

.tab-panel.active {
    display: block;
}

.upload-box {
    border: 2px dashed var(--border);
    border-radius: 15px;
    padding: 30px;
    transition: 0.3s;
}

.upload-box:hover {
    border-color: var(--primary);
}

.icon-group {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.input-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input[type="text"] {
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #0a1224;
    color: white;
}

button {
    cursor: pointer;
    border: none;
    transition: 0.3s;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    color: white;
    padding: 12px;
    border-radius: 8px;
    font-weight: bold;
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 8px 20px;
    border-radius: 5px;
}

.result-box {
    padding: 30px;
    border-top: 1px solid var(--border);
}

.hidden { display: none; }

.loader {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin { to { transform: rotate(360deg); } }

.meter-bg {
    height: 10px;
    background: var(--border);
    border-radius: 5px;
    margin: 15px 0;
}

.meter-bar {
    height: 100%;
    width: 0;
    border-radius: 5px;
    transition: 1s ease-out;
}

footer {
    margin-top: 30px;
    font-size: 0.8rem;
    color: #495670;
}