:root {
    --glass-bg: rgba(255, 255, 255, 0.12);
    --glass-border: rgba(255, 255, 255, 0.2);
    --input-bg: rgba(255, 255, 255, 0.95);
    --primary: #3b82f6;
    --success: #10b981;
}

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

html, body {
    height: 100%;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    padding: 20px;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.auth-container {
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
}

.auth-title {
    color: white;
    text-align: center;
    margin-bottom: 24px;
    font-weight: 700;
    font-size: 32px;
    letter-spacing: -0.5px;
}

.auth-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px 32px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.form-group label {
    display: block;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
}

.input-group {
    position: relative;
}

.input-group-prepend {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #64748b;
    pointer-events: none;
    z-index: 2;
    transition: color 0.3s ease;
}

.input-group .form-control {
    width: 100%;
    padding: 13px 16px 13px 46px;
    background: var(--input-bg);
    border: 2px solid transparent;
    border-radius: 12px;
    font-size: 15px;
    color: #1e293b;
    transition: all 0.3s ease;
    font-weight: 500;
}

.input-group .form-control::placeholder {
    color: #94a3b8;
}

.input-group .form-control:focus {
    outline: none;
    background: white;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.input-group .form-control:focus ~ .input-group-prepend,
.input-group:focus-within .input-group-prepend {
    color: var(--primary);
}

.custom-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
}

.custom-control-input {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

.custom-control-label {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    cursor: pointer;
    user-select: none;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(16, 185, 129, 0.5);
}

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

.auth-link {
    text-align: center;
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
    margin: 0;
}

.auth-link a {
    color: #60a5fa;
    font-weight: 700;
    text-decoration: none;
    transition: color 0.3s ease;
}

.auth-link a:hover {
    color: #93c5fd;
}

.divider {
    position: relative;
    text-align: center;
    margin: 28px 0 24px 0;
}

.divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background: rgba(255, 255, 255, 0.2);
}

.divider span {
    position: relative;
    background: transparent;
    padding: 0 16px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.google-button {
    width: 100%;
    padding: 14px;
    background: white;
    border: none;
    border-radius: 12px;
    color: #3c4043;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.google-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
}

.google-button::before {
    content: '';
    width: 20px;
    height: 20px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48"><path fill="%234285F4" d="M24 9.5c3.54 0 6.71 1.22 9.21 3.6l6.85-6.85C35.9 2.38 30.47 0 24 0 14.62 0 6.51 5.38 2.56 13.22l7.98 6.19C12.43 13.72 17.74 9.5 24 9.5z"/><path fill="%2334A853" d="M46.98 24.55c0-1.57-.15-3.09-.38-4.55H24v9.02h12.94c-.58 2.96-2.26 5.48-4.78 7.18l7.73 6c4.51-4.18 7.09-10.36 7.09-17.65z"/><path fill="%23FBBC05" d="M10.53 28.59c-.48-1.45-.76-2.99-.76-4.59s.27-3.14.76-4.59l-7.98-6.19C.92 16.46 0 20.12 0 24c0 3.88.92 7.54 2.56 10.78l7.97-6.19z"/><path fill="%23EA4335" d="M24 48c6.48 0 11.93-2.13 15.89-5.81l-7.73-6c-2.15 1.45-4.92 2.3-8.16 2.3-6.26 0-11.57-4.22-13.47-9.91l-7.98 6.19C6.51 42.62 14.62 48 24 48z"/></svg>') no-repeat center;
    background-size: contain;
}

.alert {
    padding: 12px 16px;
    background: rgba(239, 68, 68, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 10px;
    color: #fee;
    font-size: 14px;
}

.alert .close {
    float: right;
    background: none;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    opacity: 0.8;
}

.alert .close:hover {
    opacity: 1;
}

@media (max-width: 576px) {
    body {
        padding: 16px;
    }

    .auth-title {
        font-size: 26px;
        margin-bottom: 20px;
    }

    .auth-card {
        padding: 32px 24px;
    }

    .input-group .form-control {
        padding: 12px 14px 12px 44px;
        font-size: 14px;
    }

    .btn-submit {
        padding: 13px;
        font-size: 15px;
    }
}