:root {
    --bg-color: #0c0c0c;
    --card-color: #1a1a1a;
    --primary-color: #BB86FC; /* Purple-ish modern color */
    --secondary-color: #3700B3; /* Darker purple */
    --text-color: #e0e0e0;
    --text-muted: #999;
    --green-success: #03DAC6; /* Teal for success */
    --red-error: #CF6679; /* Red for error */
    --border-color: #333;
    --input-bg: #2a2a2a;
}

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

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 10px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
    letter-spacing: -0.05em;
}

header p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.card {
    background-color: var(--card-color);
    padding: 25px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    margin-bottom: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 12px 15px;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    -webkit-appearance: none; /* For iOS Safari */
    -moz-appearance: none; /* For Firefox */
    appearance: none;
}

.form-group select {
    background-image: url('data:image/svg+xml;utf8,<svg fill="%23e0e0e0" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(187, 134, 252, 0.3);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.primary-btn {
    width: 100%;
    padding: 18px;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 10px;
    border: none;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(187, 134, 252, 0.4);
}

.primary-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.progress-section {
    text-align: center;
}

#progress-bar-container {
    width: 100%;
    background-color: var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
    height: 25px;
}

#progress-bar {
    width: 0%;
    height: 100%;
    background-color: var(--green-success);
    transition: width 0.3s ease;
    border-radius: 10px;
}

#progress-text {
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 600;
}

footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    padding: 30px 0 10px;
}