/* FreeQrCodes - Ana CSS Dosyası */

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #48bb78;
    --danger: #f56565;
    --warning: #ed8936;
    --info: #4299e1;
    --dark: #2d3748;
    --light: #f7fafc;
    --border: #e2e8f0;
    --text: #2d3748;
    --text-light: #718096;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--light);
    min-height: 100vh;
}

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

/* Header - Modern Design */
.header {
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 1.25rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    transition: transform 0.3s;
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.username {
    font-weight: 600;
    color: var(--text);
}

.btn-logout,
.btn-login {
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-logout:hover,
.btn-login:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-register {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Eski header-content class'ı için backward compatibility */
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #e53e3e;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #38a169;
}

/* Cards */
.card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    margin-bottom: 2rem;
}

.card-header {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--dark);
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

select.form-control {
    cursor: pointer;
}

/* QR Preview */
.qr-preview-container {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    text-align: center;
    position: sticky;
    top: 100px;
}

.qr-preview {
    width: 100%;
    max-width: 400px;
    height: auto;
    margin: 0 auto;
    display: block;
    border-radius: 8px;
}

.qr-preview-loading {
    padding: 3rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Download Section */
.download-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 2rem;
    color: white;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.download-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.download-btn {
    background: white;
    color: var(--primary);
    padding: 1rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Radio and Checkbox */
.radio-label,
.checkbox-label {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

.radio-label:hover,
.checkbox-label:hover {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.05);
}

.radio-label input[type="radio"],
.checkbox-label input[type="checkbox"] {
    margin-right: 0.5rem;
}

.radio-label input[type="radio"]:checked + span,
.checkbox-label input[type="checkbox"]:checked + span {
    color: var(--primary);
    font-weight: 600;
}

/* Color Picker */
.color-picker-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.color-picker {
    width: 60px;
    height: 60px;
    border: 3px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.color-picker:hover {
    border-color: var(--primary);
    transform: scale(1.05);
}

/* Grid Layout */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* Alerts */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-success {
    background: #c6f6d5;
    color: #22543d;
    border-left: 4px solid var(--success);
}

.alert-danger {
    background: #fed7d7;
    color: #742a2a;
    border-left: 4px solid var(--danger);
}

.alert-info {
    background: #bee3f8;
    color: #2c5282;
    border-left: 4px solid var(--info);
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.footer-links {
    list-style: none;
}

.footer-links a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #cbd5e0;
}

/* Loading Spinner */
.spinner {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

/* Responsive */
@media (max-width: 768px) {
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .qr-preview-container {
        position: static;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.hidden { display: none; }
.visible { display: block; }