/* Базовые стили */
:root {
    --primary: #2563eb;
    --primary-light: #60a5fa;
    --primary-dark: #1d4ed8;
    --secondary: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1e293b;
    --dark-light: #334155;
    --light: #ffffff;
    --gray-light: #f8fafc;
    --gray: #e2e8f0;
    --gray-dark: #64748b;
    --border: #cbd5e1;
    --card-shadow: 0 2px 8px rgba(0,0,0,0.06);
    --transition: all 0.2s ease;
    --radius: 12px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    color: var(--dark);
    line-height: 1.4;
    font-size: 14px;
    min-height: 100vh;
    padding: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    width: 100%;
    max-width: 440px;
    min-height: 600px;
    background: var(--light);
    border-radius: var(--radius);
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    overflow: hidden;
    position: relative;
}

.auth-header {
    padding: 20px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    position: relative;
    overflow: hidden;
    min-height: 120px;
}

.auth-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.3;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    position: relative;
    z-index: 1;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.3);
}

.logo-text {
    font-size: 24px;
    font-weight: 800;
    color: white;
}

.logo-text span {
    color: rgba(255,255,255,0.9);
}

.auth-tagline {
    font-size: 13px;
    color: rgba(255,255,255,0.9);
    margin-top: 8px;
    position: relative;
    z-index: 1;
}

.auth-content {
    padding: 30px 25px;
    min-height: 480px;
}

.auth-tabs {
    display: flex;
    background: var(--gray-light);
    border-radius: 10px;
    padding: 4px;
    margin-bottom: 30px;
    position: relative;
}

.auth-tab {
    flex: 1;
    padding: 12px;
    border: none;
    background: none;
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-dark);
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    z-index: 1;
}

.auth-tab.active {
    color: var(--primary);
}

.auth-tab-slider {
    position: absolute;
    top: 4px;
    left: 4px;
    width: calc(50% - 4px);
    height: calc(100% - 8px);
    background: var(--light);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.auth-tab-slider.register {
    transform: translateX(100%);
}

.auth-form {
    display: none;
    animation: fadeIn 0.3s ease;
}

.auth-form.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 13px;
    color: var(--dark);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.form-label.required::after {
    content: ' *';
    color: var(--danger);
}

.password-toggle {
    background: none;
    border: none;
    color: var(--gray-dark);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
}

.input-group {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    padding-left: 44px;
    border: 2px solid var(--gray);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    background: var(--light);
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input.error {
    border-color: var(--danger);
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-dark);
    font-size: 16px;
}

.social-auth {
    margin: 25px 0;
    position: relative;
    text-align: center;
}

.social-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.social-divider::before,
.social-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray);
}

.social-divider span {
    font-size: 12px;
    color: var(--gray-dark);
    font-weight: 500;
}

.social-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.social-btn {
    padding: 12px;
    border: 2px solid var(--gray);
    border-radius: 10px;
    background: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.social-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

.social-btn.google { color: #ea4335; }
.social-btn.google:hover { border-color: #ea4335; background: rgba(234, 67, 53, 0.05); }
.social-btn.vk { color: #4c75a3; }
.social-btn.vk:hover { border-color: #4c75a3; background: rgba(76, 117, 163, 0.05); }
.social-btn.telegram { color: #0088cc; }
.social-btn.telegram:hover { border-color: #0088cc; background: rgba(0, 136, 204, 0.05); }
.social-btn.yandex { color: #ffcc00; }
.social-btn.yandex:hover { border-color: #ffcc00; background: rgba(255, 204, 0, 0.05); }

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 2px;
}

.checkbox-group input:checked + .checkbox-custom {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-group input:checked + .checkbox-custom::after {
    content: '✓';
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.checkbox-label {
    font-size: 13px;
    color: var(--dark);
    line-height: 1.5;
}

.checkbox-label a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.checkbox-label a:hover {
    text-decoration: underline;
}

.auth-button {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 25px 0 20px;
}

.auth-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.forgot-password {
    text-align: center;
    margin-top: 20px;
}

.forgot-password a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 13px;
}

.auth-notification {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 13px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.notification-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.notification-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.auth-alternative {
    text-align: center;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid var(--gray);
}

.auth-alternative p {
    color: var(--gray-dark);
    font-size: 13px;
    margin-bottom: 12px;
}

.switch-auth {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.auth-info {
    background: var(--gray-light);
    border-radius: 10px;
    padding: 15px;
    margin-top: 20px;
    font-size: 12px;
    color: var(--gray-dark);
    line-height: 1.5;
}

.auth-info i {
    color: var(--primary);
    margin-right: 8px;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.modal-content {
    background: var(--light);
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: white;
    z-index: 1;
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
}

.close-modal {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--gray-dark);
    cursor: pointer;
}

.modal-body {
    padding: 20px;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}

@media (max-width: 480px) {
    body {
        padding: 10px;
        align-items: flex-start;
    }
    
    .auth-container {
        min-height: auto;
    }
    
    .auth-header {
        padding: 15px;
        min-height: 100px;
    }
    
    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .auth-content {
        padding: 20px;
    }
    
    .social-buttons {
        grid-template-columns: 1fr;
    }
}

/* Прогресс регистрации */
.registration-progress {
    margin-bottom: 25px;
}

.progress-steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    position: relative;
}

.progress-steps::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--gray);
    z-index: 1;
}

.progress-bar {
    position: absolute;
    top: 15px;
    left: 20px;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
    z-index: 2;
}

.progress-step {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gray-light);
    border: 2px solid var(--gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: var(--gray-dark);
    position: relative;
    z-index: 3;
    transition: var(--transition);
}

.progress-step.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.progress-step.completed {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.progress-step.completed::after {
    content: '✓';
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    padding: 0 5px;
}

.progress-label {
    font-size: 11px;
    color: var(--gray-dark);
    text-align: center;
    width: 70px;
}

.progress-label.active {
    color: var(--primary);
    font-weight: 600;
}

/* Верификация телефона */
.phone-verification {
    text-align: center;
}

.verification-code {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin: 20px 0;
}

.code-input {
    width: 50px;
    height: 60px;
    border: 2px solid var(--gray);
    border-radius: 10px;
    font-size: 24px;
    text-align: center;
    font-weight: 700;
    color: var(--dark);
    background: var(--light);
    transition: var(--transition);
}

.code-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.code-input.filled {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.resend-code {
    margin-top: 20px;
    font-size: 13px;
    color: var(--gray-dark);
}

.resend-code a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.resend-code a:hover {
    text-decoration: underline;
}

.register-step {
    display: none;
}

.register-step.active {
    display: block;
}

.input-suffix {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-dark);
    font-size: 14px;
    cursor: pointer;
}

.auth-button.loading {
    opacity: 0.8;
    cursor: not-allowed;
}

.auth-button:active {
    transform: translateY(0);
}

.hidden { display: none; }
.text-xs { font-size: 12px; }
.text-sm { font-size: 13px; }
.mt-3 { margin-top: 12px; }
.mb-3 { margin-bottom: 12px; }
.flex { display: flex; }
.justify-center { justify-content: center; }
.gap-2 { gap: 8px; }

@media (max-width: 360px) {
    .code-input {
        width: 40px;
        height: 50px;
        font-size: 18px;
    }
    
    .progress-step {
        width: 28px;
        height: 28px;
        font-size: 11px;
    }
    
    .progress-steps::before,
    .progress-bar {
        top: 13px;
    }
}