.contribute-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 4.5rem;
    padding: 4rem 0;
    position: relative;
}

.contribute-content {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.95) 0%, rgba(250, 252, 255, 0.95) 100%);
    border-radius: 28px;
    padding: 4.5rem;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.08);
    position: relative;
    line-height: 1.8;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    animation: fadeInUp 0.8s ease-out;
}

.contribute-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 15% 85%, rgba(26, 188, 156, 0.05) 0%, transparent 25%),
                radial-gradient(circle at 85% 15%, rgba(52, 152, 219, 0.05) 0%, transparent 25%);
    pointer-events: none;
}

.contribute-content h1 {
    font-size: 4rem;
    margin-bottom: 2.5rem;
    color: var(--primary);
    font-family: 'Playfair Display', serif;
    text-align: center;
    position: relative;
    padding-bottom: 1.8rem;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contribute-content h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 5px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    border-radius: 3px;
}

.contribute-content h1 span {
    display: block;
    font-size: 0.5em;
    margin-top: 0.8rem;
    font-weight: 300;
    letter-spacing: 1px;
}

.contribute-content h2 {
    font-size: 2.6rem;
    margin: 4.5rem 0 2.2rem;
    color: var(--primary-dark);
    position: relative;
    padding-left: 2.2rem;
    font-family: 'Playfair Display', serif;
    border-bottom: 2px solid rgba(22, 160, 133, 0.15);
    padding-bottom: 1rem;
    width: 100%;
}

.contribute-content h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 0 6px rgba(22, 160, 133, 0.2);
}

.contribute-nav {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.97) 0%, rgba(250, 252, 255, 0.97) 100%);
    border-radius: 22px;
    padding: 2.8rem;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.08);
    height: fit-content;
    position: sticky;
    top: 140px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    animation: fadeInUp 0.8s ease-out;
}

.contribute-nav h3 {
    font-size: 1.7rem;
    margin-bottom: 2.2rem;
    color: var(--primary);
    padding-bottom: 1.4rem;
    border-bottom: 2px solid var(--accent-light);
    font-family: 'Playfair Display', serif;
    text-align: center;
}

.contribute-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.contribute-nav a {
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    padding: 1.4rem 1.8rem;
    border-radius: 14px;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(22, 160, 133, 0.1);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.contribute-nav a:hover {
    color: white;
    border-color: var(--accent-light);
    transform: translateX(8px) scale(1.03);
    box-shadow: 0 10px 25px rgba(22, 160, 133, 0.2);
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
}

.contribute-nav a.active {
    background: rgba(22, 160, 133, 0.15);
    color: var(--accent);
    border-color: var(--accent-light);
    box-shadow: 0 7px 20px rgba(22, 160, 133, 0.15);
}

.initiative-card {
    background: linear-gradient(145deg, rgba(232, 244, 255, 0.9) 0%, rgba(214, 235, 255, 0.9) 100%);
    border-radius: 20px;
    padding: 3rem;
    margin: 3rem 0;
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-left: 6px solid var(--accent-secondary);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
}

.initiative-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.invitation-list { list-style: none; padding-left: 0; }
.invitation-list li { padding-left: 1.8rem; position: relative; margin-bottom: 0.8rem; }
.invitation-list li::before { content: '👉'; position: absolute; left: 0; font-size: 1.1rem; }

.form-section {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.95) 100%);
    border-radius: 20px;
    padding: 3rem;
    margin: 3rem 0;
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
}

.form-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent-light), var(--accent-secondary));
    border-radius: 3px 0 0 3px;
}

.form-group {
    margin-bottom: 1.8rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: var(--primary);
}

.contribute-content input[type="text"],
.contribute-content textarea {
    width: 100%;
    padding: 15px 22px;
    border: 2px solid rgba(22, 160, 133, 0.15);
    border-radius: 14px;
    background: white;
    transition: all 0.3s;
    font-family: inherit;
    font-size: 1rem;
}

.contribute-content input[type="text"]:focus,
.contribute-content textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(22, 160, 133, 0.1);
}

.contribute-content textarea {
    resize: vertical;
    min-height: 120px;
}

.form-note { color: var(--text-light); font-size: 0.95rem; margin-top: 0.5rem; line-height: 1.6; }

.file-upload-container {
    border: 2px dashed rgba(22, 160, 133, 0.2);
    border-radius: 14px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: rgba(22, 160, 133, 0.02);
    margin-bottom: 0.5rem;
    position: relative;
    width: 100%;
}

.file-upload-container:hover {
    background: rgba(22, 160, 133, 0.05);
    border-color: var(--accent);
}

.file-upload-container input[type="file"] {
    width: 100%;
    height: 100%;
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    cursor: pointer;
}

.file-preview {
    display: none;
    flex-direction: column;
    gap: 10px;
    margin-top: 1rem;
}

.file-preview.has-files {
    display: flex;
}

.file-item {
    padding: 12px 16px;
    background: #f8fafc;
    border-radius: 10px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid #e2e8f0;
}

.file-name {
    color: var(--primary);
    font-weight: 500;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 10px;
}

.file-size {
    color: var(--text-light);
    font-size: 0.85rem;
    margin-right: 15px;
}

.file-remove {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    font-size: 1rem;
    padding: 5px;
    border-radius: 5px;
    transition: all 0.2s;
}

.file-remove:hover {
    background: rgba(239, 68, 68, 0.1);
}

.type-nav {
    display: flex;
    background: rgba(22, 160, 133, 0.08);
    padding: 6px;
    border-radius: 16px;
    margin: 2rem 0 3rem;
    border: 1px solid rgba(22, 160, 133, 0.1);
}

.nav-item {
    flex: 1;
    padding: 14px;
    border: none;
    background: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-light);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.nav-item:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.5);
}

.nav-item.active {
    background: white;
    color: var(--accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
}

.section-tab {
    display: none;
    animation: fadeIn 0.5s ease;
}

.section-tab.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.submit-btn {
    width: 100%;
    padding: 1.2rem;
    background: linear-gradient(135deg, var(--accent), #1abc9c);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    box-shadow: 0 10px 25px rgba(22, 160, 133, 0.3);
    transition: all 0.3s;
    margin-top: 2rem;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(22, 160, 133, 0.4);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

.submit-btn i.fa-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.vote-message {
    padding: 12px 20px;
    border-radius: 10px;
    margin-top: 1rem;
    font-weight: 500;
    animation: fadeInUp 0.3s ease;
}

.vote-message.success {
    background: rgba(22, 160, 133, 0.1);
    color: var(--accent);
    border: 1px solid rgba(22, 160, 133, 0.2);
}

.vote-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .contribute-content { padding: 2rem 1.5rem; border-radius: 20px; margin: 0; width: calc(100% - 3rem); max-width: 100%; overflow-wrap: break-word; word-wrap: break-word; hyphens: auto; }
    .contribute-content h1 { font-size: 2.9rem; word-break: keep-all; }
    .contribute-content h2 { font-size: 2.2rem; word-break: keep-all; }
    .contribute-content p, .initiative-card p, .form-section p, .form-note, .invitation-list li { font-size: 1rem; line-height: 1.6; overflow-wrap: break-word; word-wrap: break-word; min-width: 0; }
    .contribute-method-card, .form-section, .initiative-card { padding: 2rem; margin: 2rem 0; width: 100%; box-sizing: border-box; }
    .contribute-step-item { margin-bottom: 1.8rem; padding: 1.2rem; display: flex; flex-direction: column; }
    .contribute-step-item::before { position: relative; top: auto; left: auto; margin-bottom: 0.8rem; align-self: flex-start; }
    .contribute-step-title { font-size: 1.2rem; padding-left: 0; margin-bottom: 0.8rem; order: 1; }
    .contribute-step-detail { font-size: 1rem; padding-left: 0; line-height: 1.6; order: 2; overflow-wrap: break-word; min-width: 0; }
    .contribute-step-detail ul { margin: 0.5rem 0; }
    .contribute-step-detail li { margin-bottom: 0.3rem; padding-left: 1rem; }
    .contribute-nav { padding: 1.8rem; margin: 0 0 2rem; }
    .contribute-nav a { padding: 1.2rem 1.5rem; min-width: 180px; }
    .warning-box, .form-section { padding: 1.8rem; margin: 1.8rem 0; }
    .contribute-container { 
        grid-template-columns: 1fr; 
        gap: 2rem;
        padding: 2rem 1rem;
    }
    .type-nav {
        flex-direction: column;
        gap: 5px;
    }
}

@media (max-width: 480px) {
    .contribute-container { padding: 1.5rem 0.5rem; width: 100%; box-sizing: border-box; }
    .contribute-content { padding: 1.5rem 1rem; margin: 0; width: 100%; min-width: 0; }
    .contribute-content h1 { font-size: 2.5rem; line-height: 1.3; }
    .contribute-content h2 { font-size: 2rem; padding-left: 1.2rem; line-height: 1.3; }
    .contribute-content h2::before { width: 12px; height: 12px; }
    .contribute-method-card, .form-section, .initiative-card { padding: 1.5rem; margin: 1.5rem 0; }
    .contribute-step-item { margin-bottom: 1.5rem; padding: 1rem; }
    .contribute-step-item::before { width: 24px; height: 24px; font-size: 0.9rem; margin-bottom: 0.6rem; }
    .contribute-step-title { font-size: 1.1rem; padding-left: 0; margin-bottom: 0.6rem; }
    .contribute-step-detail { font-size: 0.95rem; padding-left: 0; line-height: 1.5; word-break: break-word; hyphens: auto; }
    .contribute-nav { padding: 1.5rem; margin: 0 0 1.5rem; }
    .contribute-nav ul { flex-direction: column; }
    .contribute-nav a { min-width: auto; justify-content: flex-start; padding: 1rem 1.2rem; }
    .warning-box, .form-section { padding: 1.5rem; margin: 1.5rem 0; }
}