/* Paper Submission Page Styles */
:root {
    --sobie-primary: #2563eb;
    --sobie-secondary: #1e40af;
    --sobie-accent: #3b82f6;
    --sobie-light: #f8fafc;
    --sobie-dark: #1e293b;
    --sobie-gradient: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--sobie-light);
    color: var(--sobie-dark);
    line-height: 1.6;
}

.header {
    background: var(--sobie-gradient);
    padding: 1rem 0;
    color: white;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.submission-container {
    max-width: 900px;
    margin: 2rem auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.submission-header {
    background: var(--sobie-gradient);
    color: white;
    padding: 2rem;
    text-align: center;
}

.submission-content {
    padding: 2rem;
}

.form-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #e2e8f0;
}

.form-section:last-child {
    border-bottom: none;
}

.section-title {
    color: var(--sobie-primary);
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.submission-type-card {
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submission-type-card:hover {
    border-color: var(--sobie-accent);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.1);
}

.submission-type-card.selected {
    border-color: var(--sobie-primary);
    background: rgba(37, 99, 235, 0.05);
}

.track-card {
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.track-card:hover {
    border-color: var(--sobie-accent);
}

.track-card.selected {
    border-color: var(--sobie-primary);
    background: rgba(37, 99, 235, 0.05);
}

.file-upload-area {
    border: 2px dashed #d1d5db;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload-area:hover {
    border-color: var(--sobie-primary);
    background: rgba(37, 99, 235, 0.05);
}

.file-upload-area.dragover {
    border-color: var(--sobie-primary);
    background: rgba(37, 99, 235, 0.1);
}

.uploaded-file {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
    display: flex;
    justify-content: between;
    align-items: center;
}

.btn-primary-custom {
    background: var(--sobie-primary);
    border: none;
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: 10px;
    width: 100%;
    font-size: 1.1rem;
    color: white;
}

.btn-primary-custom:hover {
    background: var(--sobie-secondary);
    color: white;
}

.btn-primary-custom:disabled {
    background: #94a3b8;
    color: white;
    opacity: 0.7;
    cursor: not-allowed;
}

.guidelines-section {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.alert-info {
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.2);
    color: var(--sobie-dark);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--sobie-dark);
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 0.25rem 0;
}

.feature-list li::before {
    content: "✓";
    color: #10b981;
    font-weight: bold;
    margin-right: 0.5rem;
}

.requirements-list {
    list-style: none;
    padding-left: 0;
}

.requirements-list li {
    padding: 0.25rem 0;
}

.requirements-list li::before {
    content: "•";
    color: var(--sobie-primary);
    font-weight: bold;
    margin-right: 0.5rem;
}

.form-control:focus {
    border-color: var(--sobie-primary);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

.nav-link {
    color: var(--sobie-primary);
    text-decoration: none;
}

.nav-link:hover {
    color: var(--sobie-secondary);
}

.author-entry {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid #e9ecef;
}

.track-color {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 0.5rem;
}

.keyword-tag {
    display: inline-block;
    background: var(--sobie-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    margin: 0.25rem;
}

.keyword-input-container {
    position: relative;
}

.remove-keyword {
    background: none;
    border: none;
    color: white;
    margin-left: 0.5rem;
    cursor: pointer;
}