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

:root {
    --bg: #f0f2f5;
    --card-bg: #ffffff;
    --brand-bg: linear-gradient(135deg, #d32f2f 0%, #b71c1c 100%);
    --text: #1a1a2e;
    --text-secondary: #666;
    --input-bg: #f8f9fa;
    --input-border: #e0e0e0;
    --input-focus: #d32f2f;
    --accent: #d32f2f;
    --shadow: 0 25px 80px rgba(0, 0, 0, 0.15);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0a0a0f;
        --card-bg: #16161e;
        --brand-bg: linear-gradient(135deg, #d32f2f 0%, #8b0000 100%);
        --text: #ffffff;
        --text-secondary: #a0a0a0;
        --input-bg: #1e1e2a;
        --input-border: #2d2d3a;
        --input-focus: #ff4444;
        --accent: #ff4444;
        --shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
    }
}

body {
    font-family: 'Montserrat', sans-serif;
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
    position: relative;
}

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

.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.shape-1 {
    width: 600px; height: 600px;
    background: var(--accent);
    top: -200px; right: -200px;
    animation: float1 20s ease-in-out infinite;
}

.shape-2 {
    width: 400px; height: 400px;
    background: #ff6b6b;
    bottom: -100px; left: -100px;
    animation: float2 25s ease-in-out infinite;
}

.shape-3 {
    width: 300px; height: 300px;
    background: #ffa726;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    animation: float3 15s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-50px, 50px) scale(1.1); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.05); }
}

@keyframes float3 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.5; }
}

.bg-grid {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image: 
        linear-gradient(rgba(211, 47, 47, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(211, 47, 47, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

@media (prefers-color-scheme: dark) {
    .bg-shape { opacity: 0.15; }
    .bg-grid {
        background-image: 
            linear-gradient(rgba(255, 68, 68, 0.05) 1px, transparent 1px),
            linear-gradient(90deg, rgba(255, 68, 68, 0.05) 1px, transparent 1px);
    }
}

.login-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 950px;
}

.mobile-logo {
    display: none;
    flex-direction: row;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding: 12px 20px;
    background: var(--card-bg);
    border-radius: 16px;
    border: 2px solid var(--accent);
    box-shadow: 0 4px 20px rgba(211, 47, 47, 0.15);
}

.mobile-logo img {
    width: 50px;
    height: auto;
    border-radius: 10px;
}

.mobile-logo span {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
}

.login-card {
    display: flex;
    background: var(--card-bg);
    border-radius: 24px;
    box-shadow: var(--shadow);
    overflow: hidden;
    min-height: 550px;
    border: 2px solid var(--accent);
}

.card-form {
    flex: 1;
    padding: 50px 45px;
    display: flex;
    align-items: center;
}

.form-container {
    width: 100%;
}

.form-container h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 35px;
}

.card-brand {
    flex: 0 0 380px;
    background: var(--brand-bg);
    padding: 50px 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.card-brand::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.brand {
    position: relative;
    z-index: 1;
    text-align: center;
}

.brand-logo {
    width: 120px;
    height: auto;
    filter: brightness(0) invert(1) drop-shadow(0 4px 20px rgba(0, 0, 0, 0.3));
    margin-bottom: 25px;
}

.brand h2 {
    color: white;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 10px;
}

.brand p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
}

.auth-step {
    display: none;
}

.auth-step.active {
    display: block;
    animation: slideIn 0.3s ease;
}

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

.alert {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 25px;
    background: #ffebee;
    color: #c62828;
    border: 2px solid #c62828;
}

.alert-info {
    background: rgba(211, 47, 47, 0.1);
    color: var(--accent);
    border-color: var(--accent);
}

.alert.error-message {
    background: #ffebee;
    color: #c62828;
    border: 2px solid #c62828;
    animation: shake 0.4s ease;
}

.alert.error-message.critical {
    background: #c62828;
    color: white;
    border-color: #c62828;
}

.alert.success-message {
    background: #e8f5e9;
    color: #1b5e20;
    border: 2px solid #2e7d32;
}

@media (prefers-color-scheme: dark) {
    .alert { 
        background: rgba(198, 40, 40, 0.3); 
        color: #ff8a80; 
        border: 2px solid #ff5252;
    }
    .alert-info { 
        background: rgba(255, 68, 68, 0.2); 
        color: #ff6b6b; 
        border-color: #ff6b6b;
    }
    .alert.error-message {
        background: rgba(198, 40, 40, 0.3);
        color: #ff8a80;
        border: 2px solid #ff5252;
    }
    .alert.success-message { 
        background: rgba(46, 125, 50, 0.3); 
        color: #a5d6a7; 
        border: 2px solid #66bb6a;
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-8px); }
    40%, 80% { transform: translateX(8px); }
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    text-transform: none;
    letter-spacing: normal;
    user-select: none;
    line-height: 1;
}

.checkbox-label input[type="checkbox"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border: 2px solid var(--input-border);
    border-radius: 6px;
    background: var(--input-bg);
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: all 0.2s ease;
    margin: 0;
    display: inline-block;
    vertical-align: middle;
}

.checkbox-label input[type="checkbox"]:hover {
    border-color: var(--accent);
}

.checkbox-label input[type="checkbox"]:checked {
    background: var(--accent);
    border-color: var(--accent);
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '\2713';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: 700;
}

.checkbox-label input[type="checkbox"]:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.2);
}

.checkbox-label span {
    display: inline-block;
    vertical-align: middle;
    line-height: 1;
    padding-top: 1px;
}

.input-box {
    position: relative;
}

.input-box i {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 16px;
}

.input-box input {
    width: 100%;
    padding: 16px 18px 16px 50px;
    background: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: 14px;
    font-size: 16px;
    font-family: inherit;
    color: var(--text);
}

.input-box input:focus {
    outline: none;
    border-color: var(--input-focus);
    background: var(--card-bg);
}

.input-box input::placeholder {
    color: var(--text-secondary);
}

.code-inputs {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 10px;
}

.code-input {
    width: 52px;
    height: 60px;
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    font-family: inherit;
    background: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: 12px;
    color: var(--text);
}

.code-input:focus {
    outline: none;
    border-color: var(--input-focus);
    background: var(--card-bg);
}

.btn-main {
    width: 100%;
    padding: 16px 24px;
    background: var(--accent);
    border: none;
    border-radius: 14px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-main:hover {
    filter: brightness(1.1);
}

.btn-main:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-back {
    width: 100%;
    padding: 14px;
    background: transparent;
    border: 2px solid var(--input-border);
    border-radius: 14px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    margin-top: 12px;
}

.btn-back:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.resend-section {
    text-align: center;
    margin-top: 25px;
    font-size: 14px;
    color: var(--text-secondary);
}

#resend-link {
    display: block;
    margin-top: 8px;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

#resend-link.disabled {
    color: var(--text-secondary);
    pointer-events: none;
    display: none;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

@media (max-width: 900px) {
    .login-card {
        flex-direction: column;
        max-width: 450px;
        margin: 0 auto;
    }
    
    .card-brand {
        display: none;
    }
    
    .mobile-logo {
        display: flex;
    }
    
    .card-form {
        padding: 40px 30px;
    }
    
    .form-container h1 {
        font-size: 28px;
        text-align: center;
    }
    
    .subtitle {
        text-align: center;
    }
}

@media (max-width: 480px) {
    body {
        padding: 15px;
    }
    
    .mobile-logo {
        padding: 10px 18px;
    }
    
    .mobile-logo img {
        width: 45px;
    }
    
    .mobile-logo span {
        font-size: 18px;
    }
    
    .login-card {
        border-radius: 20px;
    }
    
    .card-form {
        padding: 30px 25px;
    }
    
    .form-container h1 {
        font-size: 24px;
    }
    
    .code-inputs {
        gap: 8px;
    }
    
    .code-input {
        width: 45px;
        height: 52px;
        font-size: 20px;
    }
    
    .btn-main, .btn-back {
        padding: 14px 20px;
        font-size: 15px;
    }
}
.info-message {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 25px;
    background: rgba(211, 47, 47, 0.1);
    color: var(--accent);
    border: 2px solid var(--accent);
}

.info-message.error-message {
    background: #ffebee !important;
    color: #c62828 !important;
    border: 2px solid #c62828 !important;
    animation: shake 0.4s ease;
}

.info-message.error-message.critical {
    background: #c62828 !important;
    color: white !important;
    border-color: #c62828 !important;
}

.info-message.success-message {
    background: #e8f5e9 !important;
    color: #1b5e20 !important;
    border: 2px solid #2e7d32 !important;
}

@media (prefers-color-scheme: dark) {
    .info-message { 
        background: rgba(255, 68, 68, 0.2); 
        color: #ff6b6b; 
        border-color: #ff6b6b;
    }
    .info-message.error-message {
        background: rgba(198, 40, 40, 0.3) !important;
        color: #ff8a80 !important;
        border: 2px solid #ff5252 !important;
    }
    .info-message.success-message { 
        background: rgba(46, 125, 50, 0.3) !important; 
        color: #a5d6a7 !important; 
        border: 2px solid #66bb6a !important;
    }
}