:root {
    --primary-color: #0088cc; 
    --primary-light: rgba(0, 136, 204, 0.1);
    --primary-dark: #006699;
    --light-bg: #ffffff;
    --light-bg-alt: #f8f9fa;
    --dark-bg: #18222d;
    --dark-bg-alt: #212e3c;
    --light-text: #2c2c2c;
    --light-text-secondary: #6c757d;
    --dark-text: #e9ecef;
    --dark-text-secondary: #adb5bd;
    --border-radius: 12px;
    --transition: all 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
    --shadow-light: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.25);
    --error-color: #e74c3c;
    --success-color: #2ecc71;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    transition: var(--transition);
}

body {
    background-color: var(--light-bg);
    color: var(--light-text);
    line-height: 1.6;
    font-size: 16px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
}

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blur-bg {
    position: absolute;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, var(--primary-color) 0%, rgba(0,136,204,0) 70%);
    opacity: 0.08;
    filter: blur(80px);
    z-index: -1;
}

.dark-mode .blur-bg {
    opacity: 0.12;
}

.blur-1 {
    top: -10%;
    left: -10%;
}

.blur-2 {
    bottom: -10%;
    right: -10%;
}

.container {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.login-box {
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.dark-mode .login-box {
    background-color: var(--dark-bg-alt);
    box-shadow: var(--shadow-dark);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--light-bg-alt);
}

.dark-mode .header {
    border-bottom-color: var(--dark-bg);
}

.logo {
    font-size: 24px;
    font-weight: 800;
    text-decoration: none;
    color: var(--light-text);
    display: flex;
    align-items: center;
    letter-spacing: -0.03em;
}

.dark-mode .logo {
    color: var(--dark-text);
}

.logo img {
    margin-right: 10px;
    width: 30px;
    height: 30px;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--light-bg-alt);
    color: var(--light-text);
    transition: var(--transition);
}

.dark-mode .theme-toggle {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

.theme-toggle:hover {
    transform: rotate(15deg);
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.content {
    padding: 32px 24px;
}

h1 {
    font-size: 28px;
    margin-bottom: 12px;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: var(--light-text-secondary);
    margin-bottom: 32px;
    font-size: 15px;
}

.dark-mode .subtitle {
    color: var(--dark-text-secondary);
}

.alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    font-size: 14px;
}

.alert svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-error {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--error-color);
}

.dark-mode .alert-error {
    background-color: rgba(231, 76, 60, 0.15);
}

.alert-success {
    background-color: rgba(46, 204, 113, 0.1);
    color: var(--success-color);
}

.dark-mode .alert-success {
    background-color: rgba(46, 204, 113, 0.15);
}

.login-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.telegram-login {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.telegram-login iframe {
    margin: 0 auto; /* Center iframe */
    max-width: 100%;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--light-text-secondary);
    font-size: 14px;
    margin: 8px 0;
}

.dark-mode .divider {
    color: var(--dark-text-secondary);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--light-bg-alt);
}

.dark-mode .divider::before,
.dark-mode .divider::after {
    border-bottom-color: var(--dark-bg);
}

.divider span {
    padding: 0 10px;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
    box-shadow: 0 4px 15px rgba(0, 136, 204, 0.2);
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 136, 204, 0.3);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    box-shadow: none;
}

.dark-mode .btn-outline {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.footer {
    padding: 24px;
    border-top: 1px solid var(--light-bg-alt);
    text-align: center;
    font-size: 14px;
    color: var(--light-text-secondary);
}

.dark-mode .footer {
    border-top-color: var(--dark-bg);
    color: var(--dark-text-secondary);
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer a:hover {
    text-decoration: underline;
}

/* Модальное окно поддержки */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
}

.dark-mode .modal-content {
    background-color: var(--dark-bg-alt);
    box-shadow: var(--shadow-dark);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--light-bg-alt);
}

.dark-mode .modal-header {
    border-bottom-color: var(--dark-bg);
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--light-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px;
}

.dark-mode .close-modal {
    color: var(--dark-text-secondary);
}

.close-modal:hover {
    color: var(--light-text);
}

.dark-mode .close-modal:hover {
    color: var(--dark-text);
}

.modal-body {
    padding: 24px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    border-radius: var(--border-radius);
    background-color: var(--light-bg-alt);
    color: var(--light-text);
    text-decoration: none;
    transition: var(--transition);
}

.dark-mode .contact-method {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

.contact-method svg {
    color: var(--primary-color);
}

.contact-method:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.dark-mode .contact-method:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Адаптивность */
@media (max-width: 480px) {
    h1 {
        font-size: 24px;
    }

    .subtitle {
        font-size: 14px;
    }

    .content {
        padding: 24px 16px;
    }

    .header, .footer {
        padding: 16px;
    }
    
    .btn {
        padding: 12px 20px;
    }
}