:root {
    --bg-gradient: #07090e;
    --card-bg: rgba(18, 24, 38, 0.65);
    --input-bg: rgba(0, 0, 0, 0.2);
    --border-color: rgba(255, 255, 255, 0.08);
    --primary-color: #3b82f6;
    --primary-hover: #1e3a8a;
    --text-main: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.55);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-gradient);
    background-image: radial-gradient(circle at 50% 0%, rgba(30, 58, 138, 0.15), transparent 60%);
    color: var(--text-main);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.card-container {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    width: 100%;
    max-width: 440px;
    padding: 32px 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.header { text-align: center; margin-bottom: 24px; }
.header h1 { text-align: center; font-size: 22px; font-weight: 700; margin-bottom: 8px; letter-spacing: 0.5px; }
.header p { text-align: center; font-size: 13px; color: var(--text-muted); line-height: 1.5; }

.form-container { display: flex; flex-direction: column; gap: 16px; }

.input-group { display: flex; flex-direction: column; gap: 6px; text-align: left; }
.input-group label { font-size: 13px; font-weight: 500; color: var(--text-muted); text-align: left; }
.input-group input, .input-group select {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 15px;
    outline: none;
    transition: all 0.3s ease;
    color-scheme: dark; 
}
.input-group input:focus, .input-group select:focus { border-color: var(--primary-color); box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2); }


.input-group select option {
    background-color: #07090e; 
    color: #ffffff;
    font-size: 15px;
    padding: 12px;
}

button {
    cursor: pointer; font-size: 16px; font-weight: 600; padding: 16px;
    border-radius: 12px; border: none; transition: background 0.2s ease;
}
.btn-primary { background: linear-gradient(135deg, var(--primary-hover), var(--primary-color)); color: #ffffff; margin-top: 8px; }
.btn-primary:hover { opacity: 0.9; }

.hidden { display: none !important; }

.result-container {
    margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border-color);
    text-align: center; display: flex; flex-direction: column; align-items: center;
}
.result-container h2 { font-size: 16px; color: #10b981; margin-bottom: 16px; text-align: center; }
.qr-box { background: rgba(255, 255, 255, 0.9); padding: 16px; border-radius: 16px; margin-bottom: 20px; display: inline-block; }
.qr-box img { width: 220px; height: 220px; display: block; }

.btn-secondary {
    display: inline-block; background: transparent; color: var(--text-main);
    border: 1px solid var(--border-color); padding: 12px 24px; border-radius: 10px;
    text-decoration: none; font-weight: 500; font-size: 14px; transition: 0.2s;
}
.btn-secondary:hover { background: rgba(255, 255, 255, 0.05); border-color: rgba(255, 255, 255, 0.2); }

footer { margin-top: 32px; font-size: 12px; color: var(--text-muted); text-align: center; }