:root {
    --primary-color: #4a90e2;
    --secondary-color: #2c3e50;
    --background-color: #f5f7fa;
    --text-color: #333;
    --border-color: #ddd;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

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

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

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.conversion-types select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background-color: white;
}

/* Main Content Styles */
main {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.converter-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 2rem;
    margin-top: 2rem;
}

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

.file-drop-area:hover {
    border-color: var(--primary-color);
}

.file-input {
    display: none;
}

.drop-text {
    color: var(--text-color);
}

.file-info {
    font-size: 0.9rem;
    color: #666;
    margin-top: 0.5rem;
}

.conversion-controls {
    margin-top: 2rem;
    text-align: center;
}

.convert-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.convert-btn:hover {
    background-color: #357abd;
}

.convert-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

/* Loading Indicator */
.loading-indicator {
    margin-top: 1rem;
}

.spinner {
    border: 4px solid rgba(0,0,0,0.1);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.hidden {
    display: none;
}

/* Footer Styles */
.footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 1rem 0;
    text-align: center;
}

.footer p {
    margin: 0.5rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .converter-container {
        padding: 1rem;
    }

    .file-drop-area {
        padding: 1rem;
    }
}

@keyframes fadeInOut {
    0% {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
    10% {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    90% {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
}

@keyframes fadeOut {
    0% {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
}

/* PDF Sayfa Bölücü Modal Stilleri */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.modal-content h3 {
    margin-top: 0;
    color: #333;
    font-size: 1.5rem;
}

.page-range-inputs {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0;
}

.page-range-inputs div {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.page-range-inputs label {
    font-weight: 500;
    color: #555;
}

.page-range-inputs input {
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.modal-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.modal-buttons button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.modal-buttons .cancel-btn {
    background-color: #f1f1f1;
    color: #333;
}

.modal-buttons .cancel-btn:hover {
    background-color: #e0e0e0;
}

.modal-buttons .confirm-btn {
    background-color: #4CAF50;
    color: white;
}

.modal-buttons .confirm-btn:hover {
    background-color: #45a049;
}