* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

/* Nagłówek */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    padding: 15px 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.logo h2 {
    color: #333;
    font-weight: 600;
}

.nav {
    display: flex;
    gap: 20px;
}

.nav-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: #f8f9fa;
}

.welcome-text {
    color: #666;
    font-weight: 500;
}

/* Strona główna */
.main-content {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
}

.hero {
    text-align: center;
    background: white;
    padding: 50px;
    border-radius: 15px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    max-width: 800px;
    width: 100%;
}

.hero h1 {
    color: #333;
    font-size: 3em;
    margin-bottom: 10px;
    font-weight: 700;
}

.hero-subtitle {
    color: #666;
    font-size: 1.2em;
    margin-bottom: 40px;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.feature {
    padding: 20px;
    text-align: center;
}

.feature-icon {
    font-size: 3em;
    margin-bottom: 15px;
    display: block;
}

.feature h3 {
    color: #333;
    margin-bottom: 10px;
    font-weight: 600;
}

.feature p {
    color: #666;
    line-height: 1.5;
}

/* Przycisk download */
.download-btn-main {
    display: inline-block;
    padding: 18px 40px;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-size: 1.3em;
    font-weight: 600;
    margin: 30px 0 15px;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.download-info {
    color: #666;
    font-size: 0.9em;
}

/* Formularze */
.container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 450px;
    padding: 40px;
    margin: 0 auto;
}

.container h1 {
    color: #333;
    text-align: center;
    margin-bottom: 10px;
    font-weight: 600;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

input:focus {
    border-color: #667eea;
    outline: none;
}

button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

button:active {
    transform: translateY(0);
}

.auth-links {
    text-align: center;
    margin-top: 20px;
}

.auth-links a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.auth-links a:hover {
    text-decoration: underline;
}

.message {
    margin-top: 20px;
    padding: 12px;
    border-radius: 5px;
    text-align: center;
    display: none;
}

.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.loading {
    display: none;
    text-align: center;
    margin-top: 10px;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: #667eea;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

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