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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #6a0303;
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

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

header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

/* Not Ekleme Bölümü */
.add-note-section {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.btn-primary {
    background: #6a0303;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 44, 109, 0.4);
    background: #6a0303;
}

.btn-secondary {
    background: #6c757d;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: #5a6268;
}

.note-form {
    margin-top: 20px;
    transition: all 0.3s ease;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #6a0303;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group input[type="file"] {
    width: 100%;
    padding: 10px;
    border: 2px dashed #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #888;
    font-size: 13px;
}

/* Checkbox Styling */
.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: #555;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    border: 1px solid #c3e6cb;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    border: 1px solid #f5c6cb;
}

/* Notlar Izgara */
.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

.note-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
    position: relative;
}

.note-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.note-date {
    color: #6a0303;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.lock-icon {
    font-size: 16px;
    background: #fff3cd;
    padding: 4px 8px;
    border-radius: 5px;
}

.note-title {
    font-size: 20px;
    font-weight: 700;
    color: #333;
    margin-bottom: 12px;
}

.note-content {
    color: #555;
    line-height: 1.6;
    margin-bottom: 15px;
}

.note-media {
    margin-top: 15px;
    border-radius: 10px;
    overflow: hidden;
}

.note-media img,
.note-media video {
    width: 100%;
    height: auto;
    display: block;
}

.note-edited {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #e0e0e0;
    color: #888;
    font-size: 13px;
    font-style: italic;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    background: white;
    border-radius: 15px;
    color: #888;
    font-size: 18px;
}

/* Şifreli Not Stilleri */
.locked-note {
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
}

.locked-content {
    text-align: center;
    padding: 40px 20px;
}

.lock-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.lock-icon-big {
    font-size: 48px;
    opacity: 0.5;
}

.locked-content p {
    font-size: 18px;
    font-weight: 600;
    color: #666;
    margin: 10px 0;
}

.locked-content small {
    color: #999;
    font-size: 14px;
}

.unlocked-content {
    animation: fadeIn 0.5s ease;
}

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

/* Şifre Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content h3 {
    margin-bottom: 15px;
    color: #333;
    text-align: center;
}

.modal-content p {
    margin-bottom: 20px;
    color: #666;
    text-align: center;
}

.hint-box {
    background: #fff3cd;
    border: 1px solid #ffc107;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 15px;
    text-align: left;
}

.hint-box strong {
    color: #856404;
}

.hint-box span {
    color: #333;
    font-style: italic;
}

.modal-content input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 15px;
    margin-bottom: 20px;
}

.modal-content input:focus {
    outline: none;
    border-color: #6a0303;
}

.modal-buttons {
    display: flex;
    gap: 10px;
}

.modal-buttons button {
    flex: 1;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .notes-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .add-note-section {
        padding: 20px;
    }
    
    .form-actions,
    .modal-buttons {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
    
    .modal-content {
        width: 95%;
        padding: 20px;
    }
}

.hidden {
    display: none;
}