/* CSS Değişkenleri - Açık Tema (Varsayılan) */
:root {
    --primary-color: #4a6fa5;
    --secondary-color: #6d5baa;
    --background-color: #f5f5f5;
    --surface-color: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --border-color: #dddddd;
    --success-color: #28a745;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --border-radius: 10px;
    --transition: all 0.3s ease;
}

/* Koyu Tema Değişkenleri */
.dark-theme {
    --primary-color: #5d6bb0;
    --secondary-color: #7e6bc5;
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --text-color: #f0f0f0;
    --text-secondary: #b0b0b0;
    --border-color: #333333;
    --success-color: #34c759;
    --error-color: #ff3b30;
    --warning-color: #ffcc00;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

body {
    background-color: var(--background-color);
    color: var(--text-color);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Tema değiştirme butonu */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
}

#themeToggle {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50px;
    padding: 10px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

#themeToggle:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

/* Ana konteyner */
.container {
    width: 100%;
    max-width: 450px;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 30px;
    position: relative;
}

/* Geri dönüş butonu */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 20px;
    transition: var(--transition);
}

.back-btn:hover {
    color: var(--secondary-color);
    transform: translateX(-5px);
}

/* Başlık alanı */
.header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.logo i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

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

.header h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Giriş formu */
.login-form {
    margin-bottom: 25px;
}

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

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group label i {
    color: var(--primary-color);
}

.form-group input {
    width: 100%;
    padding: 14px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background-color: var(--surface-color);
    color: var(--text-color);
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
}

.password-container {
    position: relative;
}

.show-password {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
}

/* Form seçenekleri */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.remember-me input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.forgot-password:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Giriş butonu */
.login-btn {
    width: 100%;
    padding: 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    margin-bottom: 25px;
}

.login-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(109, 91, 170, 0.3);
}

.login-btn:active {
    transform: translateY(0);
}

/* Telegram bilgi alanı */
.telegram-info {
    background-color: rgba(74, 111, 165, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 15px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.telegram-info i {
    color: #0088cc;
    font-size: 1.5rem;
    margin-top: 2px;
}

.telegram-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.telegram-info strong {
    color: var(--primary-color);
}

/* Yükleniyor animasyonu */
.loading {
    text-align: center;
    margin-bottom: 20px;
}

.spinner {
    border: 4px solid rgba(74, 111, 165, 0.2);
    border-radius: 50%;
    border-top: 4px solid var(--primary-color);
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

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

/* Mesaj alanı */
.message {
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    text-align: center;
    font-weight: 600;
}

.message.success {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.message.error {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

/* Footer */
.footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.footer p {
    margin-bottom: 5px;
}

/* Yardımcı sınıflar */
.hidden {
    display: none !important;
}

/* Responsive tasarım */
@media (max-width: 500px) {
    .container {
        padding: 20px;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .header h2 {
        font-size: 1.3rem;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .theme-toggle {
        top: 10px;
        right: 10px;
    }
    
    #themeToggle span {
        display: none;
    }
    
    #themeToggle {
        padding: 10px;
        border-radius: 50%;
        width: 50px;
        height: 50px;
        justify-content: center;
    }
}