/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #f7f76d;
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-dark: #333333;
    --color-gray: #666666;
    --color-gray-light: #e5e5e5;
    --color-error: #dc2626;
}

body {
    font-family: 'Albert Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--color-white);
    color: var(--color-gray-dark);
    line-height: 1.6;
}

/* Header */
.app-header {
    background-color: var(--color-primary);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.app-header-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo {
    height: 35px;
    width: auto;
}

.logo-link {
    display: flex;
    align-items: center;
}

.back-link {
    color: var(--color-black);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: opacity 0.2s;
}

.back-link:hover {
    opacity: 0.7;
}

/* Main Content */
.app-main {
    min-height: calc(100vh - 200px);
    padding: 60px 20px;
}

.app-container {
    max-width: 900px;
    margin: 0 auto;
}

.app-intro {
    text-align: center;
    margin-bottom: 60px;
}

.app-intro h1 {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 16px;
}

.app-intro p {
    font-size: 18px;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

.deadline-info {
    background-color: #fffef0;
    border: 2px solid var(--color-primary);
    border-radius: 8px;
    padding: 20px;
    margin: 24px auto;
    max-width: 500px;
    text-align: center;
}

.deadline-text {
    font-size: 16px;
    color: var(--color-black);
    margin: 8px 0;
}

.deadline-text strong {
    font-weight: 700;
}

.form-tools {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 24px;
    flex-wrap: wrap;
}

/* Form Sections */
.form-section {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 40px 0;
    margin-bottom: 40px;
    transition: margin-bottom 0.3s ease, padding 0.3s ease;
}

.form-section.collapsed {
    margin-bottom: 16px;
    padding: 16px 0;
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 30px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-gray-light);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.section-title:hover {
    opacity: 0.8;
}

.section-toggle-icon {
    font-size: 24px;
    transition: transform 0.3s ease;
}

.section-title.collapsed .section-toggle-icon {
    transform: rotate(-90deg);
}

.section-content-wrapper {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    max-height: 10000px;
    opacity: 1;
}

.section-content-wrapper.collapsed {
    max-height: 0;
    opacity: 0;
}

.form-subsection {
    margin-top: 40px;
    padding-top: 30px;
    border-top: none;
}

.form-subsection h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: 12px;
}

.reference-group {
    background: transparent;
    padding: 0;
    margin-bottom: 24px;
}

.reference-group h5 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-gray-dark);
    margin-bottom: 16px;
}

/* Founder Blocks */
.founder-block {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--color-gray-light);
}

.founder-block:last-child {
    border-bottom: none;
}

.founder-header {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-gray-dark);
    margin-bottom: 24px;
}

/* Form Groups */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-gray-dark);
    margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="url"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: inherit;
    border: 2px solid var(--color-gray-light);
    border-radius: 8px;
    background-color: var(--color-white);
    color: var(--color-gray-dark);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(247, 247, 109, 0.2);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #999;
}

/* Radio Groups */
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 400;
    color: var(--color-gray-dark);
}

.radio-label input[type="radio"] {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    cursor: pointer;
    accent-color: var(--color-black);
}

.radio-label span {
    font-size: 15px;
}

/* Helper Text */
.helper-text {
    display: block;
    font-size: 13px;
    color: var(--color-gray);
    margin-top: 6px;
    font-style: italic;
}

/* Character Counter */
.char-counter {
    display: block;
    text-align: right;
    font-size: 13px;
    color: var(--color-gray);
    margin-top: 4px;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-black);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-black);
    border: 2px solid var(--color-gray-light);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    background-color: #fffef0;
}

.btn-tool {
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    background-color: var(--color-black);
    color: var(--color-white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-tool:hover {
    opacity: 0.8;
}

/* Form Actions */
.form-actions {
    text-align: center;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 2px solid var(--color-gray-light);
}

.form-actions .btn-primary {
    padding: 16px 48px;
    font-size: 18px;
}

/* Footer */
.app-footer {
    background-color: #fafafa;
    padding: 40px 20px;
    text-align: center;
    border-top: 1px solid var(--color-gray-light);
    margin-top: 60px;
}

.app-footer p {
    font-size: 14px;
    color: var(--color-gray);
}

.app-footer a {
    color: var(--color-black);
    font-weight: 600;
    text-decoration: none;
}

.app-footer a:hover {
    text-decoration: underline;
}

/* Validation Styles */
input:invalid:not(:placeholder-shown),
textarea:invalid:not(:placeholder-shown),
select:invalid:not(:placeholder-shown) {
    border-color: var(--color-error);
}

input:invalid:not(:placeholder-shown):focus,
textarea:invalid:not(:placeholder-shown):focus,
select:invalid:not(:placeholder-shown):focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .deadline-info {
        padding: 16px;
        margin: 20px auto;
    }

    .deadline-text {
        font-size: 14px;
    }

    .form-tools {
        flex-direction: column;
        gap: 12px;
    }

    .form-tools .btn-tool {
        width: 100%;
        text-align: center;
    }

    .app-header-content {
        padding: 0 16px;
    }

    .header-logo {
        height: 28px;
    }

    .back-link {
        font-size: 13px;
    }

    .app-main {
        padding: 40px 16px;
    }

    .form-section {
        padding: 24px 20px;
    }

    .section-title {
        font-size: 24px;
    }

    .radio-group {
        flex-direction: column;
        gap: 12px;
    }

    .form-actions .btn-primary {
        width: 100%;
    }

    .founder-header {
        font-size: 20px;
    }

    .reference-group {
        padding: 0;
    }
}

@media (max-width: 480px) {
    .app-intro h1 {
        font-size: 28px;
    }

    .app-intro p {
        font-size: 16px;
    }

    .form-section {
        padding: 20px 0;
    }

    .section-title {
        font-size: 22px;
    }

    .modal-content {
        margin: 10px;
    }

    .modal-title {
        font-size: 20px;
        padding: 20px 20px 16px;
    }

    .modal-body {
        padding: 20px;
        font-size: 14px;
    }

    .modal-code {
        font-size: 12px;
        padding: 12px;
    }

    .modal-close {
        right: 15px;
        top: 15px;
        font-size: 28px;
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn-secondary,
    .modal-footer .btn-primary {
        width: 100%;
    }
}

/* Loading State */
.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Success Message */
.success-message {
    background-color: transparent;
    border: none;
    border-radius: 0;
    padding: 60px 20px;
    margin-bottom: 40px;
    text-align: center;
}

.success-message h3 {
    color: var(--color-black);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.success-message p {
    color: var(--color-gray);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--color-white);
    margin: 20px;
    padding: 0;
    border-radius: 12px;
    max-width: 700px;
    width: 100%;
    position: relative;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 32px;
    font-weight: 300;
    color: var(--color-gray);
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--color-black);
}

.modal-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-black);
    padding: 30px 30px 20px;
    border-bottom: 2px solid var(--color-gray-light);
}

.modal-body {
    padding: 30px;
    color: var(--color-gray-dark);
    line-height: 1.6;
}

.modal-body p {
    margin-bottom: 16px;
}

.modal-body ol {
    margin: 16px 0 16px 20px;
    padding-left: 0;
}

.modal-body li {
    margin-bottom: 12px;
    padding-left: 8px;
}

.modal-example {
    margin-top: 24px;
    margin-bottom: 8px;
    font-weight: 600;
}

.modal-code {
    background-color: #f5f5f5;
    border: 1px solid var(--color-gray-light);
    border-radius: 6px;
    padding: 16px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: var(--color-gray-dark);
    overflow-x: auto;
    margin-bottom: 16px;
}

.modal-note {
    margin-top: 20px;
    font-style: italic;
    color: var(--color-gray);
    margin-bottom: 0;
}

.modal-footer {
    padding: 20px 30px 30px;
    text-align: center;
    display: flex;
    gap: 12px;
    justify-content: center;
}

.modal-footer .btn-secondary,
.modal-footer .btn-primary {
    min-width: 150px;
}

.submit-founder-group {
    background-color: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    margin-bottom: 32px;
}

.submit-founder-group:last-child {
    margin-bottom: 0;
}

.submit-founder-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-black);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-gray-light);
}

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

.submit-founder-group .form-group:last-child {
    margin-bottom: 0;
}

.submit-founder-group .form-group label {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-gray-dark);
    margin-bottom: 8px;
}

.submit-founder-group .form-group input[type="tel"],
.submit-founder-group .form-group input[type="email"] {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: inherit;
    border: 2px solid var(--color-gray-light);
    border-radius: 8px;
    background-color: var(--color-white);
    color: var(--color-gray-dark);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.submit-founder-group .form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(247, 247, 109, 0.2);
}

.submit-founder-group .form-group input::placeholder {
    color: #999;
}

.submit-founder-group .helper-text {
    display: block;
    font-size: 13px;
    color: var(--color-gray);
    margin-top: 6px;
    font-style: italic;
}