/* Stanford Red Color Scheme */
:root {
    --stanford-red: #8C1515;
    --stanford-red-dark: #6D0F0F;
    --stanford-red-light: #B1040E;
    --background: #f5f5f5;
    --white: #ffffff;
    --text-dark: #2e2d29;
    --text-light: #5f5e5a;
    --border: #d5d5d4;
    --success: #175e54;
    --error: #8C1515;
}

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

body {
    font-family: 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Navigation */
.navbar {
    background-color: var(--stanford-red);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-container h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#userDisplay {
    font-weight: 500;
}

/* Login Box */
.login-box {
    max-width: 400px;
    margin: 100px auto;
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Signup Section */
.signup-section {
    margin-top: 2rem;
    padding-top: 2rem;
}

.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.5rem 0;
}

.signup-section h3 {
    color: var(--stanford-red);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Terms Agreement Styles */
.terms-agreement {
    margin: 1rem 0;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--text-dark);
}

.checkbox-label input[type="checkbox"] {
    margin-right: 0.5rem;
    margin-top: 0.1rem;
    cursor: pointer;
}

.terms-link {
    color: var(--stanford-red);
    text-decoration: underline;
    font-weight: 500;
}

.terms-link:hover {
    color: var(--stanford-red-dark);
    text-decoration: none;
}

.checkbox-label input[type="checkbox"]:required:invalid {
    border-color: var(--error);
}

.checkbox-label input[type="checkbox"]:required:invalid + .checkmark {
    border-color: var(--error);
}

.login-box h1 {
    color: var(--stanford-red);
    font-size: 2rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* Forms */
.form-section {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border);
}

.form-section:last-of-type {
    border-bottom: none;
    margin-bottom: 2rem;
}

.section-title {
    color: var(--stanford-red);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--stanford-red-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.field-guidance {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
    padding: 0.75rem;
    background-color: rgba(140, 21, 21, 0.05);
    border-left: 3px solid var(--stanford-red-light);
    border-radius: 0 4px 4px 0;
}

.field-guidance p {
    margin-bottom: 0.75rem;
}

.field-guidance ul {
    margin: 0.75rem 0 0 1.5rem;
    padding: 0;
}

.field-guidance li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--stanford-red);
}

.form-group textarea {
    resize: vertical;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-primary {
    background-color: var(--stanford-red);
    color: var(--white);
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--stanford-red-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 1px solid var(--white);
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.1);
}

.navbar .btn-secondary {
    width: auto;
}

/* Dashboard */
.dashboard {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-top: 20px;
}

.dashboard h1 {
    color: var(--stanford-red);
    margin-bottom: 1.5rem;
}

.action-bar {
    margin-bottom: 2rem;
}

/* Submit Form */
.submit-form {
    background-color: var(--background);
    padding: 30px;
    border-radius: 8px;
    margin-bottom: 2rem;
    border: 2px solid var(--stanford-red);
}

.submit-form h2 {
    color: var(--stanford-red);
    margin-bottom: 1.5rem;
}

.submit-form.hidden {
    display: none;
}

.form-buttons {
    display: flex;
    gap: 1rem;
}

.form-buttons .btn-primary,
.form-buttons .btn-secondary {
    width: auto;
    flex: 1;
}

.form-buttons .btn-secondary {
    background-color: var(--text-light);
    color: var(--white);
    border: none;
}

.form-buttons .btn-secondary:hover {
    background-color: var(--text-dark);
}

/* Results List */
.results-list {
    margin-top: 2rem;
}

.result-card {
    background-color: var(--background);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 4px solid var(--stanford-red);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.result-card h3 {
    color: var(--stanford-red);
    margin: 0;
    flex: 1;
}

.btn-delete {
    background-color: #dc3545;
    color: var(--white);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s;
    white-space: nowrap;
}

.btn-delete:hover {
    background-color: #c82333;
}

.btn-edit {
    background-color: var(--stanford-red);
    color: var(--white);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s;
    white-space: nowrap;
}

.btn-edit:hover {
    background-color: var(--stanford-red-dark);
}

.result-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.result-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.result-section {
    margin-bottom: 1rem;
}

.result-section strong {
    display: block;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

/* Hypothesis Management */
.hypothesis-entry {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    align-items: center;
}

.hypothesis-input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
}

.hypothesis-input:focus {
    outline: none;
    border-color: var(--stanford-red);
}

.btn-add,
.btn-remove {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-add {
    background-color: var(--stanford-red);
    color: var(--white);
    margin-top: 0.5rem;
}

.btn-add:hover {
    background-color: var(--stanford-red-dark);
}

.btn-remove {
    background-color: #dc3545;
    color: var(--white);
    white-space: nowrap;
}

.btn-remove:hover {
    background-color: #c82333;
}

.required-note {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: normal;
}

/* File Upload Section */
.file-upload-section {
    margin-top: 1rem;
}

.file-upload-section.enhanced {
    margin-top: 1rem;
}

.file-upload-area {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    background-color: var(--background);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.file-upload-area:hover {
    border-color: var(--stanford-red-light);
    background-color: rgba(140, 21, 21, 0.02);
}

.file-upload-area.dragover {
    border-color: var(--stanford-red);
    background-color: rgba(140, 21, 21, 0.05);
    transform: scale(1.02);
}

.file-upload-content {
    pointer-events: none;
}

.upload-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.upload-text {
    font-size: 1rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.upload-link {
    color: var(--stanford-red);
    text-decoration: underline;
    font-weight: 600;
}

.upload-note {
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 0;
}

.file-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

input[type="file"] {
    display: block;
    margin-top: 0.5rem;
    padding: 0.5rem;
    font-size: 0.9rem;
}

.file-name {
    display: block;
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--stanford-red-light);
    color: var(--white);
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: 4px;
    text-align: center;
}

.file-attachment {
    color: var(--stanford-red);
    font-weight: 500;
}

/* Hypotheses List Display */
.hypotheses-list {
    margin: 0.5rem 0 0 1.5rem;
    padding: 0;
}

.hypotheses-list li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

/* Welcome Message */
.welcome-message {
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
}

/* Messages */
.info-text {
    text-align: center;
    color: var(--text-light);
    margin-top: 1rem;
}

.error-message {
    color: var(--error);
    text-align: center;
    margin-top: 1rem;
    font-weight: 500;
}

.success-message {
    color: var(--success);
    text-align: center;
    margin-top: 1rem;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .login-box {
        margin: 50px 20px;
        padding: 30px;
    }

    .dashboard {
        padding: 20px;
    }

    .submit-form {
        padding: 20px;
    }

    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    /* Mobile form improvements */
    .form-section {
        margin-bottom: 2rem;
        padding-bottom: 1.5rem;
    }

    .section-title {
        font-size: 1.1rem;
        margin-bottom: 1rem;
    }

    .form-group {
        margin-bottom: 1.5rem;
    }

    .field-guidance {
        font-size: 0.85rem;
        padding: 0.5rem;
        margin-bottom: 0.75rem;
    }

    .field-guidance ul {
        margin-left: 1rem;
    }

    .file-upload-area {
        padding: 1.5rem 1rem;
    }

    .upload-text {
        font-size: 0.9rem;
    }

    .upload-note {
        font-size: 0.8rem;
    }

    /* Better touch targets */
    .btn-primary,
    .btn-secondary,
    .btn-add,
    .btn-remove,
    .btn-delete, .btn-edit {
        min-height: 44px;
        font-size: 1rem;
    }

    /* Mobile result header */
    .result-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .result-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .btn-delete, .btn-edit {
        margin: 0;
        width: 100%;
    }

    .form-group input,
    .form-group textarea {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 1rem 0.75rem;
    }
}